US Patent: 494,518 - Brake mechanism


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US Patent: 494,518

Brake mechanism

Patentee:

Henry Bolthoff (exact or similar names) - Denver, CO

USPTO Classifications:

188/77R

Tool Categories:

material handling : industrial elevators and lifts

specialty machines : mining apparatus

Assignees:

None

Manufacturer:

Hendrie & Bolthoff Manufacturing & Supply CO. - Denver, CO

Witnesses:

Muriel Strode

William McConnell

Patent Dates:
Applied:	May 09, 1892
Granted:	Mar. 28, 1893

Patent Pictures:

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Vintage Machinery entry for Hendrie & Bolthoff Mfg. & Supply Co.

Description:

Seen in an 1898 Hendrie & Bolthoff catalog, "Our Double Cylinder Quadruple Friction Hoist. The fixtures comprise steam pipes as shown in cut, patent balanced throttle valve, oil cups, nickel-plated double sight-feed lubricator, oil cans, set steel forged wrenches and foundation bolt ends."