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After failing to interest manufacturers, Thompson sold his self-centering design to Phillips in 1935. [4] Phillips formed the Phillips Screw Company in 1934. After refining the design (U.S. Patent #2,046,343, U.S. Patents #2,046,837 to 2,046,840) for the American Screw Company of Providence, Rhode Island, Phillips succeeded in bringing the design to industrial manufacturing and promoting its ...
Screwdriver with rubber handle. The tool used to drive a slotted screw head is called a standard, common blade, flat-blade, slot-head, straight, flat, flat-tip, [ 6 ] or " flat-head " [ 7 ] screwdriver. This last usage can be confusing, because the term flat-head also describes a screw with a flat top, designed to install in a countersunk hole.
List of screw drives. At a minimum, a screw drive is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. [1][2] Usually, it also involves a mating tool, such as a screwdriver, that is used to turn it. Some of the less-common drives are classified as being "tamper-resistant".
A lathe of 1871, equipped with leadscrew and change gears for single-point screw-cutting A Brown & Sharpe single-spindle screw machine. Fasteners had become widespread involving concepts such as dowels and pins, wedging, mortises and tenons, dovetails, nailing (with or without clenching the nail ends), forge welding, and many kinds of binding with cord made of leather or fiber, using many ...
A Torx T8 screw head on a hard disk drive. Torx (pronounced / tɔːrks /) is a trademark for a type of screw drive characterized by a 6-point star-shaped pattern, developed in 1967 [1] by Camcar Textron. [a] A popular generic name for the drive is star, as in star screwdriver or star bits. The official generic name, standardized by the ...
In woodworking and construction, a nail is a small object made of metal (or wood, called a tree nail or "trunnel") which is used as a fastener, as a peg to hang something, or sometimes as a decoration. [ 1 ] Generally, nails have a sharp point on one end and a flattened head on the other, but headless nails are available.
Cam out. Cam out (also cam-out or camming out) is a process by which a screwdriver slips out of the head of a screw being driven once the torque required to turn the screw exceeds a certain amount. [1] Repeatedly camming out damages the screw, and possibly also the screwdriver, and should normally be avoided.
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 ...
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