Robert A Sims

US Patent:

40566870, Nov 1, 1977

Filed:

Aug 16, 1976

Appl. No.:

5/714592

Inventors:

Robert Dennis Sims - Addison IL

Assignee:

Western Electric Company - New York NY

International Classification:

H04M 322
H04B 346

US Classification:

179 16F

Abstract:

A common control circuit is disclosed for controlling bypassing relays to disconnect telephone line auxiliary circuits from their respective lines preparatory to line testing or for other desired purposes. The control circuit responds to a bypass request signal applied to a line by operating an associated bypassing relay and by activating a timing circuit. The timing circuit and other circuitry cooperate to hold the bypassing relay operated for a time interval sufficient for fulfilling the purpose of the bypass. For serving a bypass request received while another request is being served, the appropriate bypassing relay is operated when the subsequent request is received and the timing circuit is reactivated to insure a sufficient test time for the subsequent request. All operated bypassing relays are held operated until the expiration of a time interval during which no new bypass requests are received. The control circuit includes monitoring circuitry operative to detect selected internal and external failure conditions.

US Patent:

42536057, Mar 3, 1981

Filed:

May 23, 1979

Appl. No.:

6/042101

Inventors:

Robert L. Sims - White Bear Lake MN

International Classification:

E01B 200

US Classification:

238 8

Abstract:

A pair of channel members are fastened by lag bolts between the rails, and a single channel member is fastened on each outer side thereof, each channel member being formed of a pair of U-shaped steel channels welded together in side by side relationship. A metal plate is welded across the upper, open portions of each channel member, the upper surface of the metal plates being coated with epoxy and a non-skid aggregate.