P
Poising the Balance
In merely poising a balance for a cheap movement there is no great difficulty, that is, putting it in equipoise sufficient for the…
Paris
This is a good cement for attaching letters to windows. Apply warm to heated surfaces where possible. Cement for Glass and Metals. The…
Pivoting Chuck
The Gem patent pivoting chuck, shown in Figs. 79 and 80, is intended as a substitute for wax for pivoting and like work. By the means of…
Pickling of Metals
Metals are pickled for the purpose of removing the oxide and producing a lustrous surface. An excellent pickle for brass consists of ten…
Polishing Agents
Various polishing agents are used by watchmakers, jewelers, gold and silversmiths, a few of which are here described. Where the article…
Pneumatic Clock
One of a series of clocks governed by pulsations of air, sent to them at regular intervals through tubes which are controlled and operated…
Parliament
Vulliamy and other leading clockmakers, who were invited to tender for the work, all demurred to a stipulation that the clock should be…
Pinion and Wire Gauge
The jewelers' gauge shown in Fig. 141, will be found very useful in measuring pinions, wire or flat metal. The DECIMALS EQUALING PARTS OF…
Phil
Trans., London, 1678. Concerning a movement that measures Time after a peculiar manner; being a Clock descendant on an Inclined Plane. Rev…
Pantograph Engine
A machine or instrument for copying on the same, an enlarged or a reduced scale. Making a Pantograph. In beginning a pantograph attachment…
Parachute
A mechanical contrivance used in some of the older watches, by which the endstone was held against the hole jewel by a spring sufficiently…
Pendule Watches
A name given to watches of early construction having on one arm, or cross-piece of the balance, a representation of the bob of a pendulum…
Pendulum
A body suspended from a fixed point in such a manner as to swing freely to and fro by the alternate action of gravity and momentum. The…
Pendulum Error
The long and short vibrations of a free pendulum will only be isochronous if the path described is a cycloid, which is a curve described by…
Pocket Chronometer – Pillar Plate
A pocket watch with chronometer escapement. That portion of an escapement by means of which the escape wheel gives impulse to the balance.
Pinion Grinder and Polisher
The ends of the leaves of pinions, when ground flat and polished, add very much to the beauty of a job when completed. Proceed to turn down…
Pin Pallet Escapement
This escapement is not often met with except in French clocks, and the escapement is generally exported. It is difficult to keep the oil on…
Pin Vise
An improved form of pin vise is that shown in Fig. 250, manufactured by A. J. Logan. It is hollow throughout its entire length and closes…
Pin Wheel Escapement
An escapement for clocks which is now rarely used. It was invented by Lepaute about 1753. It is open to the same objections that the pin…
Pivot Polisher
The pivot polisher is used for grinding and polishing conical and straight pivots and shoulders. It is also useful for drilling, polishing…
Pivoted Detent
A detent which is mounted upon a pivoted arbor around which is a small spiral spring which causes it to return to the locking position.
Plate
In a watch or clock the plates form the framework of the movement and in which the holes for the pivots of the train run. The plate in…
Poising Tool
A tool consisting of two parallel jaws mounted upon a base in such a way that they may be opened or closed to suit the length of the arbor…
Polishing
See Cleansing, Pickling and Polishing. For polishing of steel, pivots, etc. See Steel, Pivots, etc. POOLE, JOHN. An English chronometer…
Potential Energy
Ability to develop power. A weight or spring when wound possesses potential energy or power to do work. The force multiplied by the…
Push Piece
The movable part of a pendant used for opening the case. The small movable projection on the side of a case which is pushed in when setting…
Parts Brass Parts Zinc
Parts Tin. Refractory 4.00 1.00 Readily Fusible, 5.00 4.00 Half White, 12 00 5.00 1.00 White, 40.00 2 00 8.00 Very Ductile, 78.25 17 25
Parts Gold
Parts Silver. Parts Copper. Parts Zinc. Hard solder for 750 fine 9.0 2.0 1.0 Soft solder for 750 fine 12.0 7.0 3.0 Solder for 583 fine 3.0…
Pinion – Parts Fine Silver
The smaller of two toothed wheels which are geared into one another. The tooth of a pinion is called a pinion leaf. The end of an arbor or…