Patent Model - Screw-Driver
Maker and role
Cal Thomas (b.1837, d.Post 1884), Patentee
Production date
May 23 1882
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Object detail
Media/Materials
Wood, iron, brass
Measurements
8 x 1 1/2" (20.3 x 3.8cm)
Description
Thomas' patent "relates to improvements in screw-drivers in which clamping-jaws are used for holding the screw in contact with the driver when entering it into the material into which it is to be driven; and the objects of my improvements are to provide certain novel devices and combinations thereof, which, when properly arranged, shall constitute a screw-driver, which, when a screw is properly placed in it, will hold it in position for being entered into the substance into which it is to be driven..." (Patent Number 258,329)
Collection
Object number
2015.14.3417a,b
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