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Laying Out the Escapement (We must first determine)
In laying out the escapement we must first determine the size of the escape wheel and also the number of teeth it is to have. We will make…
Locomotive Clock
A clock adapted to be carried in the cab of a locomotive, and so constructed as to withstand the jarring and heat variations of the…
Luminous or Phosphorescent Dial
A dial covered with varnish or a solution of white wax in turpentine, over which is dusted powdered sulphide of barium. Such a dial is…
Laying Out the Escapement (Having decided upon the size)
Having decided upon the size of escape wheel and the number of teeth the anchor is to cover, draw a circle representing the escape wheel…
Lacquer
The ordinary lacquer of commerce is composed of spirits of wine and clear shellac in the proportion of 1 OZ. of shellac to a pint of…
Lantern Pinion
A pinion formed of two circular brass, or other metal plates, and connected by means of short steel wires. LAP. A disc used in conjunction…
Lathe (Mechanical device used)
A mechanical device used for shaping articles by causing them to revolve while being brought into contact with cutting tools. Those who…
Lepine Movement
An extremely thin bar movement. Lepine introduced his improvements in 1776 and they consisted of the suppression of the pillar plate, the…
Le Roy
JULIEN. A celebrated French horologist. He was the inventor of the horizontal mechanism for turret clocks. He introduced improvements in…
Lever Escapement
(The student will do well to read: The Detached Lever Escapement, by Moritz Grossman; Modern Horology in Theory and Practice, by Claudius…
Locking
The amount the escape tooth overlaps the pallet at the time it leaves the impulse face. The part where the escape tooth strikes the pallet.
Lathe (Mandrel is worked by means)
The mandrel is worked by means of a handle, and is usually made with wheel and pinion, although a round belt or gut is sometimes used. It…
Laws of Pendulums
There are three laws in regard to the movement of simple pendulums that are well to remember. 1. The number of vibrations performed by…
Length of Pendulums
One-second pendulums are long enough for all but turret clocks, and longer than two-second pendulums should not be used. The very long…
Length of Balance Pivots
Saunier recommends the removal of the endstone to see that the pivot projects enough beyond the pivot hole when the plate is inverted…
Left-Handed Screws
A screw plate for left-handed screws can easily be made by screwing a good piece of steel of the desired size into a right-handed screw…
Lead
Melts at Deg. F. 1 1 25 558 7 1 1/2 1 334 2 1 10 541 8 2 1 340 3 1 5 511 9 3 1 356 4 1 3 482 10 4 1 365 5 1 2 441 11 5 1 378 6 1 1 37 12 6…