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A hex key (also, hex wrench, Allen key and Allen wrench or Inbus) is a simple driver for bolts or screws that have heads with internal hexagonal recesses ( sockets ). Hex keys are formed from a single piece of hard hexagonal steel rod, having blunt ends that fit snugly into similarly shaped screw sockets. The rods are bent to 90º, forming two ...
Originally named Allen Manufacturing Company, the business produced hexagonal set screws and wrenches to fasten them. The terms "Allen wrench" (American English) and "Allen key" (British English) [ 3] are derived from the Allen brand name and refer to the generic product category "hex keys". W.G. Allen [ 4] filed the first related patent in ...
Hopkins & Allen Arms Company was an American firearms manufacturing company based in Norwich, Connecticut, that was founded in 1868 by Charles W. Allen, Charles A. Converse, Horace Briggs, Samuel S. Hopkins and Charles W. Hopkins. The Hopkins brothers ran the company's day-to-day operations until it went bankrupt in 1916 and was subsequently ...
In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt , screw or rivet , when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat ...
Broaching is a machining process that uses a toothed tool, called a broach, to remove material. There are two main types of broaching: linear and rotary. In linear broaching, which is the more common process, the broach is run linearly against a surface of the workpiece to produce the cut. Linear broaches are used in a broaching machine, which ...
Eight-contact DIP switch with 0.3" wide 16-pin (DIP16N) footprint. In microelectronics, a dual in-line package ( DIP or DIL) [ 1] is an electronic component package with a rectangular housing and two parallel rows of electrical connecting pins. The package may be through-hole mounted to a printed circuit board (PCB) or inserted in a socket.
Barrel flute bears 1837 patent date, hammer is marked "Allen's Patent". Ethan Allen (September 2, 1808 – January 7, 1871) was a major American arms maker from Massachusetts. He is unrelated to the revolutionary Ethan Allen. His first firearm, the "Pocket rifle" was developed in 1836, and his first patent was granted in 1837.
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