US Patent: 1,888,222 - Screw Driver


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US Patent: 1,888,222

Screw Driver

Patentees:

Harry B. Curtis (exact or similar names) - Huntington, Fairfield County, CT

Arthur E. Keating (exact or similar names) - Bridgeport, Fairfield County, CT

USPTO Classifications:

279/102, 279/43.2, 279/96, 81/177.1, 81/436

Tool Categories:

screwdrivers

Assignees:

Bridgeport Hardware Mfg. Co. - Bridgeport, Fairfield County, CT

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Nov. 26, 1931
Granted:	Nov. 22, 1932

Patent Pictures: [ 1 | 2 ]

Harry B. Curtis & Arthur E. Keating patent Nov. 22, 1932 - sheet 1

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Description:

Handle structure for a removable screwdriver bit, including the internal metallic portion with a roughened exterior. The portion at the lower portion of the handle may be formed with flat sides suitable for manipulation by a wrench. The interior end of the bit has a slight taper so it will firmly wedge in the metallic holder. The bulk of the handle is formed of preferably insulating material which is molded around the metallic bit holder.