List of screw drives - Wikipedia Coin-slot drives are so-called because of the curved bottom of the recess that facilitates driving them with a suitable coin, are often used on items where the user is not likely to have a screwdriver when needed, such as on thumb-screws … Template talk:Screw drives - Wikipedia have sort of an enlarged slot, with those sides of the normal slot on which the screwdriver bears, when tightening the screw, being flat and offset by a normal amount, but the corresponding surfaces for loosening missing: instead, the would … When a Phillips Is Not a Phillips!: 30 Steps (with Pictures)
Why did this guy Phillips think we needed a new type of ...
History of the Bolt - Nord-Lock Group Initially, screw threads for fasteners were made by hand but soon, due to a significant increase in demand, it was necessary to speed up the production process. In Britain in 1760, J and W Wyatt introduced a factory process for the mass production of screw threads. Phillips screw and driver - The Oregon Encyclopedia The Phillips screw and driver, originally invented by Portlander John P. Thompson, dramatically increased the speed of manufacturing and made the Phillips screwdriver a necessity in every toolbox. Thompson applied for the patent rights on a "Screw" (U.S. Patent 1908080) with an innovative “cruciform groove” and a matching "Screw driver" (U.S. Patent 1908081) in 1932.
Screw - Wikipedia
5 Types of Screwdrivers Every DIYer Should Know - Bob Vila Screwdrivers have only two purposes: to insert screws and to remove them. .... by a Canadian inventor who was tired of damaging slotted screws every time the ... Wikijunior:How Things Work/Screw - Wikibooks, open books for an ... Historians do not know who invented the screw. ... common types of screw heads were round with simple slots that were turned ...
Screwdriver Basics
Historical Background on Screw Threads - Bolt Science Historical Background. It is considered by some that the screw thread was invented in about 400BC by Archytas ... Screws with fine pitches are essential in a wide ... The history of the screw - Wagner Werkzeugsysteme Müller GmbH The history of the screw ... Screws were also used in the railway construction. 20th century End of story? Certainly not! Special technical demands arising from
Another Turn of the Wood Screw ... screws were produced by the late 18th century. ... invented the first cold worked fly press to make screw head blanks ...
Discover Mid-America | Common Sense Antiques Discover Mid-America — August 2007. ... blunt tip and the off center slot. ... Screws with these characteristics were produced until early in the 19th century.
Oct 18, 2012 · The screw on the right is a modern gimlet screw, post 1848, with tapered shaft, even threads, pointed tip and centered slot. Photo courtesy Fred Taylor. The handmade nails of the period derived much of their holding power from the ability to drive the nail through two surfaces and bend it over on the back side, i.e. “clinch” it tight. When were screws first made - answers.com Screws were used for some industrial tools and for firearms. The slotted screw needed a tool to turn it, so someone made a tool to do that. The first screwdrivers were known as a turnscrew. History of Screws and Screwdrivers - The Inventors Mass Production of Screws. In 1770, English instrument maker, Jesse Ramsden (1735-1800) invented the first satisfactory screw-cutting lathe. Ramsden inspired other inventors. In 1797, Englishmen, Henry Maudslay (1771-1831) invented a large screw-cutting lathe that made it possible to mass-produce accurately sized screws. System for Dating Country and Primitive Furniture, Part