David H Goldsmith

US Patent:

44362463, Mar 13, 1984

Filed:

Aug 3, 1979

Appl. No.:

6/035920

Inventors:

David S. Goldsmith - Highland Park IL

International Classification:

E01B 2300

US Classification:

238 14

Abstract:

A vehicle traction device adapted to provide a traction base for a drive wheel of an automotive vehicle, comprising in combination, a length of cylindrical pipe stock, metal washers space and fastened at intervals along the length of this pipe stock in surrounding relation thereto, end portions of metal angle stock, the pipe stock intersecting with this angle stock generally at the convex surface centers and with the pipe and angle stock major axes at right angles to one another, these components being welded together so as to constitute a unitized whole.

US Patent:

39510328, Apr 20, 1976

Filed:

Jul 23, 1974

Appl. No.:

5/490989

Inventors:

Louis F. LaPorta - Chicago IL
David S. Goldsmith - Chicago IL

International Classification:

G10D 1304

US Classification:

84419

Abstract:

This invention relates to a foot-operated Bowden type cable mechanism which is operatively associated with a padded damping plate whose incidence with the underside of a timpano membrane, for example, terminates its vibration. If the device of the invention is actuated prior to the delivery of an exciting blow, operation is as a muffler or mute. In an alternate embodiment, an electromechanical actuator is mounted so as to allow the silent and hand-free muffling or silencing of a timpano. Typically, the actuator is a direct current energized solenoid mounted internally to the drum. This solenoid is of the push type, the magnetically nonsusceptible plunger-extension being directed upwards and conveying to the underside of the timpano membrane the camping plate with overlying padding whose incidence with the membrane mutes or terminates its vibration. A foot switch permits hands-free operation.