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A ballistic chronograph or gun chronograph is a measuring instrument used to measure the velocity of a projectile in flight, typically fired from a gun or other firearm. The instrument is often useful for tasks such as gauging the utility of a firearm or safety of non-lethal projectiles fired from items such as a paintball gun or BB gun .
A Roskopf, pin-lever, or pin-pallet escapement is an inexpensive, less accurate version of the lever escapement, used in mechanical alarm clocks, kitchen timers, mantel clocks and, until the 1970s, cheap watches now known as pin lever watches. It was popularized by German watchmaker Georges Frederic Roskopf in its "proletarian watch" from 1867 ...
Pallet fork with jewel pallets (pink) The pallet fork is above the balance wheel in this watch movement. The pallet fork is a component of the lever escapement of a mechanical watch. [1] The pallet fork and the lever form one component that sits between the escape wheel and the balance wheel. Its purpose is to lock the escape wheel, and release ...
We can now use momentum conservation for the bullet-pendulum system to get the speed of the bullet, , before it struck the pendulum. Equating the momentum of the bullet before it impacts the pendulum to that of the bullet-pendulum system as soon as the bullet strikes the pendulum (and using v 1 = 2 ⋅ g ⋅ h {\displaystyle v_{1}={\sqrt {2 ...
The Poljot Strela is a Russian hand-wound chronograph movement. Strela is Russian for "arrow". [1] Poljot produced the famous and popular "Schaltradchronographs" with the brands "Poljot", "Sekonda" and "Strela". [2] The price of an uncased chronograph-caliber 3133 is approximately EUR 35.00. [3]
The Waltham Watch Company, also known as the American Waltham Watch Co. and the American Watch Co., was a company that produced about 40 million watches, clocks, speedometers, compasses, time delay fuses, and other precision instruments in the United States of America between 1850 and 1957.
A chronograph is a watch with an added duration timer, often a stopwatch complication (as explained above), while a chronometer watch is a timepiece that has met an industry-standard test for performance under pre-defined conditions: a chronometer is a high quality mechanical or a thermo-compensated movement that has been tested and certified ...
A mechanical chronometer is a spring-driven escapement timekeeper, like a watch, but its parts are more massively built. Changes in the elasticity of the balance spring caused by variations in temperature are compensated for by devices built into it. [2] Chronometers often included other innovations to increase their efficiency and precision.