{"id":40,"date":"2020-11-21T13:44:09","date_gmt":"2020-11-21T13:44:09","guid":{"rendered":"https:\/\/new.bwcmg.org\/?page_id=40"},"modified":"2021-01-18T15:27:38","modified_gmt":"2021-01-18T15:27:38","slug":"glossary","status":"publish","type":"page","link":"https:\/\/bwcmg.org\/index.php\/glossary\/","title":{"rendered":"Glossary"},"content":{"rendered":"\t\t
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GLOSSARY<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t
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\r\n\r\n
\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n A<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Anchor <\/td>\n \n A part of an escapement of the same name. It looks like an upside-down anchor.\n <\/td>\n <\/tr>\n
\n Arbor <\/td>\n \n The name given to mechanical shafts in horology.\n <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n B<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n
\n Balance <\/td>\n \n Looks like a wheel and provides the mass for escapements which do not depend of pendulums.\n <\/td>\n <\/tr>\n
\n Balance spring <\/td>\n \n A spiral spring, one end of which is fixed to the balance and the other end to the frame, which, with the balance, forms an oscillator\n <\/td>\n <\/tr>\n
\n Barrel <\/td>\n \n The case in which the mainspring is contained.\n <\/td>\n <\/tr>\n
\n Beat <\/td>\n \n The even tick-tock of a clock or watch.\n <\/td>\n <\/tr>\n
\n Bezel <\/td>\n \n The frame holding the glass in front of a clock or watch.\n <\/td>\n <\/tr>\n
\n Brocot escapement <\/td>\n \n A type of deadbeat escapement using semi-cylindrical pins.\n <\/td>\n <\/tr>\n
\n Bush <\/td>\n \n An annular insertion of brass into the plate to provide a fresh bearing surface for the pivot.\n <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n C<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Cannon pinion <\/td>\n \n The pinion, having a long extension, which fits on the centre arbor and holds the minute hand.\n <\/td>\n <\/tr>\n
\n Case screws <\/td>\n \n The screws which hold the movement in the case. <\/td>\n <\/tr>\n
\n Centre seconds <\/td>\n \n Having a second hand concentric with the hour and minute hands. <\/td>\n <\/tr>\n
\n Centre wheel <\/td>\n \n The wheel on the centre arbor. <\/td>\n <\/tr>\n
\n Chiming <\/td>\n \n Producing a musical sequence of notes, often at the quarter hours. <\/td>\n <\/tr>\n
\n Chronograph <\/td>\n \n A clock or watch which records intervals of time. The hands can be stopped or started at will without stopping the mechanism and interfering with the timekeeping. <\/td>\n <\/tr>\n
\n Chronometer <\/td>\n \n A very accurate timekeeper. <\/td>\n <\/tr>\n
\n Click <\/td>\n \n A sprung detent which stops a ratchet wheel from turning backwards. <\/td>\n <\/tr>\n
\n Cock <\/td>\n \n A small plate holding one or two pivots only. <\/td>\n <\/tr>\n
\n Countwheel striking <\/td>\n \n An early and simple method of controlling the number of strokes sounded at the hour. <\/td>\n <\/tr>\n
\n Crown wheel <\/td>\n \n A wheel where the teeth face along the arbor and used in the verge escapement. <\/td>\n <\/tr>\n
\n Cylinder escapement <\/td>\n \n A balance wheel escapement driven by the escape wheel engaging in a cutaway cylinder. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n D<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Deatbeat <\/td>\n \n A type of escapement without recoil. <\/td>\n <\/tr>\n
\n Dial <\/td>\n \n The plate on which the numerals are marked. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n E<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Escapement <\/td>\n \n The device which controls the speed of the clock or watch time train. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n F<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Fly <\/td>\n \n The rotating flat plate or governor which controls the speed of the striking or chiming trains. <\/td>\n <\/tr>\n
\n Full plate <\/td>\n \n Where the back plate covers the whole of the watch movement. <\/td>\n <\/tr>\n
\n Fusee <\/td>\n \n A tapered pulley device which evens out the pull of the mainspring. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n G<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Going train <\/td>\n \n The train of wheels and pinions driving the escapement. <\/td>\n <\/tr>\n
\n Gut line <\/td>\n \n A line used to connect weights to the movement or to connect the mainspring to the fusee. Can be made from natural gut or can be artificial. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n H<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Hairspring <\/td>\n \n See Balance Spring <\/td>\n <\/tr>\n
\n Half plate <\/td>\n \n Where the back plate of the watch covers only about half of the movement. Separate small plates called Cocks hold the escapement and fourth wheel pivots. <\/td>\n <\/tr>\n
\n Hole <\/td>\n \n A circular hole in the plate in which a pivot runs. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n I<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Impulse <\/td>\n \n The small push given to the balance or pendulum once or twice each oscillation. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n J<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Jewel <\/td>\n \n A precious or artificial stone used as a pivot hole or as an end cap for a pivot. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n K<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Keywind <\/td>\n \n Wound by a key. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n L<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Lever escapement <\/td>\n \n An escapement where an anchor shaped lever provides the impulse to the balance. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n M<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Mainspring <\/td>\n \n A spiral spring, usually in a barrel, used as the motive force of a clock or watch. <\/td>\n <\/tr>\n
\n Motion work <\/td>\n \n The wheels and pinions linking the minute and hour hands together. <\/td>\n <\/tr>\n
\n Movement <\/td>\n \n The 'works' of a clock or watch. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n O<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Olive <\/td>\n \n A small plunger in a watch case used in conjunction with the winding button to allow the hands to be set. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n P<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n
\n Pallet <\/td>\n \n The teeth, usually only two, that engage in the escape wheel. <\/td>\n <\/tr>\n
\n Pendulum <\/td>\n \n A mass on the end of a rod which when acted upon by gravity provides the constant period oscillator for clocks. <\/td>\n <\/tr>\n
\n Perpetual calendar <\/td>\n \n An automatic calendar in a watch or clock which takes account of the varying lengths of months and of leap years. <\/td>\n <\/tr>\n
\n Pin pallet <\/td>\n \n A type of lever escapement using pins on the lever to obtain impulse. <\/td>\n <\/tr>\n
\n Pinions <\/td>\n \n A name for small gears, usually made of steel, driven by the larger wheels. <\/td>\n <\/tr>\n
\n Pivot <\/td>\n \n A fine extension of an arbor, running in a pivot hole. <\/td>\n <\/tr>\n
\n Plate <\/td>\n \n The back or front sheet of metal of a watch or clock movement in which the pivots run. <\/td>\n <\/tr>\n
\n Platform Escapement <\/td>\n \n A self-contained and removable balance escapement. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n R<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n
\n Rack striking <\/td>\n \n A mechanism which superseded countwheel striking to control the number of strokes sounded at the hour. Allowed the use of repeater work. <\/td>\n <\/tr>\n
\n Ratchet wheel <\/td>\n \n A toothed wheel used in conjunction with a click to allow rotation in one direction only. <\/td>\n <\/tr>\n
\n Rating nut <\/td>\n \n The nut above or below a pendulum used to alter its length and so the rate at which the clock goes. <\/td>\n <\/tr>\n
\n Regulation <\/td>\n \n The process of changing the rate of a clock or watch. <\/td>\n <\/tr>\n
\n Regulator <\/td>\n \n The lever or other device used principally with balance escapements to alter the rate. <\/td>\n <\/tr>\n
\n Repeater <\/td>\n \n A clock or watch which can strike the last hour, with in some cases, the quarter and even the minutes at will. <\/td>\n <\/tr>\n
\n Run <\/td>\n \n Usually uncontrolled running of a movement <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n S<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n
\n Split seconds <\/td>\n \n Having two second hands, each of which can be stopped at will. <\/td>\n <\/tr>\n
\n Spring lug <\/td>\n \n The telescopic bar on a watch used to hold the strap. <\/td>\n <\/tr>\n
\n Stemwind <\/td>\n \n A watch wound by a knob or button, not with a key. <\/td>\n <\/tr>\n
\n Stop work <\/td>\n \n A mechanism connected to the winding to prevent overwinding. <\/td>\n <\/tr>\n
\n Stopwatch <\/td>\n \n A watch whose mechanism can be stopped or started at will. Used for timing events. See chronograph. <\/td>\n <\/tr>\n
\n Striking <\/td>\n \n Sounding the hours and perhaps the half-hours as well. <\/td>\n <\/tr>\n
\n Striking train <\/td>\n \n The train of wheels and pinions controlling the striking <\/td>\n <\/tr>\n
\n Suspension <\/td>\n \n A fine strip of steel, or sometimes silk thread, on which the pendulum hangs. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n T<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Three-quarter plate <\/td>\n \n Where the back plate of a watch covers 3\/4 of the movement, with the escapement pivoted in separate cocks. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n V<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Verge <\/td>\n \n An early type of escapement where a crown wheel drives steel flags on the balance or pendulum arbor. <\/td>\n <\/tr>\n
\n Visible escapement <\/td>\n \n An escapement mounted on the dial of a clock. Often a Brocot escapement. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n W<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n
\n Waterproof <\/td>\n \n A vague term. See the notes on water resistant watches. <\/td>\n <\/tr>\n
\n Wheels <\/td>\n \n The larger gears that drive pinions in movements. <\/td>\n <\/tr>\n
\n Winding button <\/td>\n \n The knob on a watch case that is used for winding. <\/td>\n <\/tr>\n
\n Winding square <\/td>\n \n The squared end of the mainspring arbor on which the key is fitted. <\/td>\n <\/tr>\n
\n Winding stem <\/td>\n \n The small shaft in the movement on which the winding button is fixed. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n <\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t
\r\n\r\n
\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n A<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Anchor <\/td>\n \n A part of an escapement of the same name. It looks like an upside-down anchor.\n <\/td>\n <\/tr>\n
\n Arbor <\/td>\n \n The name given to mechanical shafts in horology.\n <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n B<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n
\n Balance <\/td>\n \n Looks like a wheel and provides the mass for escapements which do not depend of pendulums.\n <\/td>\n <\/tr>\n
\n Balance spring <\/td>\n \n A spiral spring, one end of which is fixed to the balance and the other end to the frame, which, with the balance, forms an oscillator\n <\/td>\n <\/tr>\n
\n Barrel <\/td>\n \n The case in which the mainspring is contained.\n <\/td>\n <\/tr>\n
\n Beat <\/td>\n \n The even tick-tock of a clock or watch.\n <\/td>\n <\/tr>\n
\n Bezel <\/td>\n \n The frame holding the glass in front of a clock or watch.\n <\/td>\n <\/tr>\n
\n Brocot escapement <\/td>\n \n A type of deadbeat escapement using semi-cylindrical pins.\n <\/td>\n <\/tr>\n
\n Bush <\/td>\n \n An annular insertion of brass into the plate to provide a fresh bearing surface for the pivot.\n <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n C<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n
\n Cannon pinion <\/td>\n \n The pinion, having a long extension, which fits on the centre arbor and holds the minute hand.\n <\/td>\n <\/tr>\n
\n Case screws <\/td>\n \n The screws which hold the movement in the case. <\/td>\n <\/tr>\n
\n Centre seconds <\/td>\n \n Having a second hand concentric with the hour and minute hands. <\/td>\n <\/tr>\n
\n Centre wheel <\/td>\n \n The wheel on the centre arbor. <\/td>\n <\/tr>\n
\n Chiming <\/td>\n \n Producing a musical sequence of notes, often at the quarter hours. <\/td>\n <\/tr>\n
\n Chronograph <\/td>\n \n A clock or watch which records intervals of time. The hands can be stopped or started at will without stopping the mechanism and interfering with the timekeeping. <\/td>\n <\/tr>\n
\n Chronometer <\/td>\n \n A very accurate timekeeper. <\/td>\n <\/tr>\n
\n Click <\/td>\n \n A sprung detent which stops a ratchet wheel from turning backwards. <\/td>\n <\/tr>\n
\n Cock <\/td>\n \n A small plate holding one or two pivots only. <\/td>\n <\/tr>\n
\n Countwheel striking <\/td>\n \n An early and simple method of controlling the number of strokes sounded at the hour. <\/td>\n <\/tr>\n
\n Crown wheel <\/td>\n \n A wheel where the teeth face along the arbor and used in the verge escapement. <\/td>\n <\/tr>\n
\n Cylinder escapement <\/td>\n \n A balance wheel escapement driven by the escape wheel engaging in a cutaway cylinder. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n D<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Deatbeat <\/td>\n \n A type of escapement without recoil. <\/td>\n <\/tr>\n
\n Dial <\/td>\n \n The plate on which the numerals are marked. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n E<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Escapement <\/td>\n \n The device which controls the speed of the clock or watch time train. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n F<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Fly <\/td>\n \n The rotating flat plate or governor which controls the speed of the striking or chiming trains. <\/td>\n <\/tr>\n
\n Full plate <\/td>\n \n Where the back plate covers the whole of the watch movement. <\/td>\n <\/tr>\n
\n Fusee <\/td>\n \n A tapered pulley device which evens out the pull of the mainspring. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n G<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Going train <\/td>\n \n The train of wheels and pinions driving the escapement. <\/td>\n <\/tr>\n
\n Gut line <\/td>\n \n A line used to connect weights to the movement or to connect the mainspring to the fusee. Can be made from natural gut or can be artificial. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n H<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Hairspring <\/td>\n \n See Balance Spring <\/td>\n <\/tr>\n
\n Half plate <\/td>\n \n Where the back plate of the watch covers only about half of the movement. Separate small plates called Cocks hold the escapement and fourth wheel pivots. <\/td>\n <\/tr>\n
\n Hole <\/td>\n \n A circular hole in the plate in which a pivot runs. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n I<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Impulse <\/td>\n \n The small push given to the balance or pendulum once or twice each oscillation. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n J<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Jewel <\/td>\n \n A precious or artificial stone used as a pivot hole or as an end cap for a pivot. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n K<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Keywind <\/td>\n \n Wound by a key. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n L<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Lever escapement <\/td>\n \n An escapement where an anchor shaped lever provides the impulse to the balance. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n M<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n
\n Mainspring <\/td>\n \n A spiral spring, usually in a barrel, used as the motive force of a clock or watch. <\/td>\n <\/tr>\n
\n Motion work <\/td>\n \n The wheels and pinions linking the minute and hour hands together. <\/td>\n <\/tr>\n
\n Movement <\/td>\n \n The 'works' of a clock or watch. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n O<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Olive <\/td>\n \n A small plunger in a watch case used in conjunction with the winding button to allow the hands to be set. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n P<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n
\n Pallet <\/td>\n \n The teeth, usually only two, that engage in the escape wheel. <\/td>\n <\/tr>\n
\n Pendulum <\/td>\n \n A mass on the end of a rod which when acted upon by gravity provides the constant period oscillator for clocks. <\/td>\n <\/tr>\n
\n Perpetual calendar <\/td>\n \n An automatic calendar in a watch or clock which takes account of the varying lengths of months and of leap years. <\/td>\n <\/tr>\n
\n Pin pallet <\/td>\n \n A type of lever escapement using pins on the lever to obtain impulse. <\/td>\n <\/tr>\n
\n Pinions <\/td>\n \n A name for small gears, usually made of steel, driven by the larger wheels. <\/td>\n <\/tr>\n
\n Pivot <\/td>\n \n A fine extension of an arbor, running in a pivot hole. <\/td>\n <\/tr>\n
\n Plate <\/td>\n \n The back or front sheet of metal of a watch or clock movement in which the pivots run. <\/td>\n <\/tr>\n
\n Platform Escapement <\/td>\n \n A self-contained and removable balance escapement. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n R<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n
\n Rack striking <\/td>\n \n A mechanism which superseded countwheel striking to control the number of strokes sounded at the hour. Allowed the use of repeater work. <\/td>\n <\/tr>\n
\n Ratchet wheel <\/td>\n \n A toothed wheel used in conjunction with a click to allow rotation in one direction only. <\/td>\n <\/tr>\n
\n Rating nut <\/td>\n \n The nut above or below a pendulum used to alter its length and so the rate at which the clock goes. <\/td>\n <\/tr>\n
\n Regulation <\/td>\n \n The process of changing the rate of a clock or watch. <\/td>\n <\/tr>\n
\n Regulator <\/td>\n \n The lever or other device used principally with balance escapements to alter the rate. <\/td>\n <\/tr>\n
\n Repeater <\/td>\n \n A clock or watch which can strike the last hour, with in some cases, the quarter and even the minutes at will. <\/td>\n <\/tr>\n
\n Run <\/td>\n \n Usually uncontrolled running of a movement <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n S<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n \n \n \n
\n Split seconds <\/td>\n \n Having two second hands, each of which can be stopped at will. <\/td>\n <\/tr>\n
\n Spring lug <\/td>\n \n The telescopic bar on a watch used to hold the strap. <\/td>\n <\/tr>\n
\n Stemwind <\/td>\n \n A watch wound by a knob or button, not with a key. <\/td>\n <\/tr>\n
\n Stop work <\/td>\n \n A mechanism connected to the winding to prevent overwinding. <\/td>\n <\/tr>\n
\n Stopwatch <\/td>\n \n A watch whose mechanism can be stopped or started at will. Used for timing events. See chronograph. <\/td>\n <\/tr>\n
\n Striking <\/td>\n \n Sounding the hours and perhaps the half-hours as well. <\/td>\n <\/tr>\n
\n Striking train <\/td>\n \n The train of wheels and pinions controlling the striking <\/td>\n <\/tr>\n
\n Suspension <\/td>\n \n A fine strip of steel, or sometimes silk thread, on which the pendulum hangs. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n T<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n
\n Three-quarter plate <\/td>\n \n Where the back plate of a watch covers 3\/4 of the movement, with the escapement pivoted in separate cocks. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n V<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n
\n Verge <\/td>\n \n An early type of escapement where a crown wheel drives steel flags on the balance or pendulum arbor. <\/td>\n <\/tr>\n
\n Visible escapement <\/td>\n \n An escapement mounted on the dial of a clock. Often a Brocot escapement. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n
\r\n
\r\n \r\n \r\n W<\/span>\r\n\r\n \r\n
\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n
\r\n \r\n <\/i> <\/div>\r\n\r\n <\/div>\r\n\r\n \r\n <\/a>\r\n <\/div>\r\n\r\n
\r\n\r\n
\r\n \n \n \n \n \n \n \n \n
\n Waterproof <\/td>\n \n A vague term. See the notes on water resistant watches. <\/td>\n <\/tr>\n
\n Wheels <\/td>\n \n The larger gears that drive pinions in movements. <\/td>\n <\/tr>\n
\n Winding button <\/td>\n \n The knob on a watch case that is used for winding. <\/td>\n <\/tr>\n
\n Winding square <\/td>\n \n The squared end of the mainspring arbor on which the key is fitted. <\/td>\n <\/tr>\n
\n Winding stem <\/td>\n \n The small shaft in the movement on which the winding button is fixed. <\/td>\n <\/tr>\n <\/tbody>\n<\/table> <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n <\/div>\r\n <\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

GLOSSARY A Anchor A part of an escapement of the same name. It looks like an upside-down anchor. Arbor The name given to mechanical shafts in horology. B Balance Looks like a wheel and provides the mass for escapements which do not depend of pendulums. Balance spring A spiral spring, one end of which is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-40","page","type-page","status-publish","hentry","entry"],"_links":{"self":[{"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/pages\/40"}],"collection":[{"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/comments?post=40"}],"version-history":[{"count":31,"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/pages\/40\/revisions"}],"predecessor-version":[{"id":726,"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/pages\/40\/revisions\/726"}],"wp:attachment":[{"href":"https:\/\/bwcmg.org\/index.php\/wp-json\/wp\/v2\/media?parent=40"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}