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A common type of internal broach is the keyway broach (C & D). It uses a special fixture called a horn to support the broach and properly locate the part with relation to the broach. [9] A concentricity broach is a special type of spline cutting broach which cuts both the minor diameter and the spline form to ensure precise concentricity. [9]
There are three main steps in broaching a keyway: First, the workpiece is set on the arbor press and the bushing is placed in the opening of the workpiece. Next, the broach is inserted and pushed through, cutting the keyway. Finally, shims are placed between the bushing and the broach to achieve the correct depth necessary for the key. [6]
The segment of a key which enters the keyway of a lock and has key cuts machined into it. On a bit key the blade is called a bit. [3] Bolt stump In lever tumbler locks, a bolt stump is a rectangular part located above the talon, and passes through the slot in the levers as the bolt moves. [4] Bottom pin See key pin. Break
The company Richter from Rudolstadt began producing large amounts of Tangram-like puzzles of different shapes, the so-called "Anker-puzzles" in about 1891. In 1893, Angelo John Lewis, using the pen name "Professor Hoffman", wrote a book called Puzzles; Old and New. It contained, among other things, more than 40 descriptions of puzzles with ...
A common variation on the standard Fill-In is using numbers, instead of specific words, sometimes called "cross numbers". [1] [8] In this puzzle, the entries could be listed as the number, a mathematical expression, or even an important year. [8] A more complex variation on the Fill-In is the "diagramless" Fill-In, where the grid is initially ...
A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.
Once all pins are picked, the tension wrench is then used to turn the plug and open the lock. There are two basic types of tension: "bottom of the keyway" and "top of the keyway". The bottom of the keyway wrenches is typically shaped like a letter "L", although the vertical part of the letter is elongated in comparison to the horizontal part.
Watts Brothers Tool Works is a tool manufacturer located in Wilmerding, Pennsylvania.They are known for manufacturing drill bits that can drill square holes, [1] [2] including blind holes, which cannot be made with other methods such as broaching.