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Malleable Brass
A malleable brass is obtained by alloying 33 parts of copper and 25 parts zinc; the copper is first thrown into the pot, which is covered…
Metal Cement
Take plaster of Paris, and mix it to proper thickness by using water containing about one-fourth of gum Arabic. This cement is excellent…
Munger's Improved Chronometer Escapement
In this escapement, which is illustrated in Fig. 64, the detent and staff are in one piece, with a notch in the head to hold the locking…
Master Clock
A clock which is carefully regulated and used to correct others, by electricity or otherwise. 2. The original clock model from which others…
Management
Those who have never used the cyanide bath may desire some additional particulars regarding its management. The anodes in such a bath…
Micrometer Caliper
Fig. 140 is a full size cut of the Brown & Sharp Mfg. Co.'s micrometer caliper. It measures from one-thousandth of an inch to one-half…
Making the Anchor
This form of anchor presents no difficulties in making it, but, of course, more care is necessary than in an ordinary escapement. The…
Mudge
Nevil Maskelyne, 8vo, London, 1792. Investigations, founded on the theory of Motion, for determinating the Times of Vibrations of Watch…
Magnetism
The agent or force in nature which gives rise to the phenomena of attraction, polarity, etc., exhibited by the loadstone, magnet, etc. A…
Mainspring
The ribbon of steel which serves to produce the motive power for a watch, chronometer, or clock. It is said to be the invention of Peter…
Millimeters and Fractions
Compiled by L. A. Grosclaude, Geneva. No. of turns spring is capable of developing. Theoretical No. Real No. 5 5 1/2 6 6 1/2 7 7 1/2 8 9 10…
Mainspring Punch
A punch used by watchmakers for perforating mainsprings. It is inserted in a vise when used. These punches are also made in the form of…
Mainspring Winder
A good mainspring winder is a necessary adjunct to every watchmaker's bench. The Stark potent winder, shown in Fig. 231, is a very superior…
Mandrel
A cheap form of lathe, but little used in this country, being superseded by the American lathe. It is known also as the Swiss Universal
Mass
The amount of matter a body contains. It must not be confounded with weight, for the mass of a body remains the same, no matter in what…
Material Cup
This cup will be found very useful to those who keep small material in bottles. The material, being placed in the cup, spreads out over the…
Milling Cutters
It has been a difficult matter for mechanics to understand the proper angle for a cutter to mill, or burr the stock, so that it will bend…
Milling Fixture
This attachment is fitted to the slide rest and holds the wire chuck vertically under the center of the lathe, so that articles held in the…
Male Centers – Minute Wheel Pinion
Conically pointed pins; the opposite of female centers. A chronometer hung in gimbals, for use at sea in determining longitude.
Miter Gears
Gears whose shafts are at right angles to each other and whose diameters are equal. All miter gears are bevel gears, but all bevel gears…
Modulus of Elasticity
The measure of the elastic force of any substance, expressed by the ratio of a pressure on a given unit of the substance to the…
Momentum
The amount of motion in a body, which is obtained by multiplying its mass by its velocity. MOSELEY, CHARLES S. Mr. Moseley has been…
Movement Box
A metal box with glass sides, for holding watch movements while timing, etc., before casing. In the Rockford box, shown in Fig. 239, stem…
Movement Cover
A glass shade to protect a movement, or portions of a movement from dust and from being lost while undergoing repairs. Fig. 240 illustrates…
Movement Holder
A metal frame, as shown in Fig. 241, having three adjustable arms for holding the movement by clamping on to the plate. It is useful in…
Mudge Thomas
The inventor of the lever escapement and a maker of marine chronometers. He was born at Exeter, England, in 1715. He was apprenticed to the…
Millimeters
Number of Oscillations per Hour. Length in Millimeters. Variation in Length for One Minute in 24 Hours in Millimeters. 20,000 32.2 0.04…
Minute
Loss, Lengthen by Millimeters. Gain, Shorten by Millimeters. Number of Oscillations per Hour. Length in Meters. To Produce in 24 Hours 1…
Mercurial Compensation
In the mercurial pendulum with a glass jar, the mercury does not answer so quickly to a change of temperature as the steel rod, and…
Minute Wheel Stud – Melting Points
The pin or stud upon which minute wheel pinion revolves. Is the tendency of an elastic body to produce motion.