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Edward Ormerod developed and patented the "Ormerod" safety link or detaching hook, known in mining circles as a "butterfly". This elegant device was inserted into the winding rope in such a way that if the lift cage was accidentally overwound the link would be pulled into a bell through which the winding rope passed.
The latch hook tool traces its origin to the invention of the latch needle. Invented in 1847, the latch needle was part of a knitting machine that wrapped yarn around the latch and pushed through a canvas before pulling it through and knotting the yarn to the canvas. [6] In the 1920s, the tool was created by combining the hand hook with the ...
A cabin hook latch. A cabin hook is a hooked bar that engages into a staple. [7] [8] The bar is usually attached permanently to a ring or staple that is fixed with screws or nails to woodwork or a wall at the same level as the eye screw. The eye screw is usually screwed into the adjacent wall or onto the door itself.
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Gull-wing doors have a somewhat questionable reputation because of early examples like the Mercedes and the Bricklin. [7] The 300 SL needed the door design, as its tubular frame race car chassis design had a very high door sill, which in combination with a low roof would make a standard door opening very low and small.
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The Alfa Romeo 33 Stradale was the first car with butterfly doors.. Butterfly doors were first seen on the Alfa Romeo 33 Stradale in 1967. [2]These doors were commonly used in Group C and IMSA GTP prototypes, as they preserved the aerodynamic shape of the canopy while allowing the driver to enter and exit the car more quickly than conventional and gullwing doors.
The 19-inch (482.6 mm) standard rack arrangement is widely used throughout the telecommunications, computing, audio, video, entertainment and other industries, though the Western Electric 23-inch standard, with holes on 1-inch (25.4 mm) centers, is still used in legacy ILEC/CLEC facilities.
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