Ronald Chris Todd

US Patent:

43575641, Nov 2, 1982

Filed:

Apr 9, 1979

Appl. No.:

6/027998

Inventors:

Andrew F. Deming - Alliance OH
Ronald C. Todd - Gibsonia PA

Assignee:

The Alliance Manufacturing Company - Alliance OH

International Classification:

H02P 122
H02P 320

US Classification:

318280

Abstract:

A motorized operator is used for control of a closure, e. g. , a garage door operator. Where the garage door is an upward opening door, there are four conditions for operation of the control system, namely stop-down, run-up, stop-up, and run-down. The present operator is one wherein safety conditions prevail, in that the run-down condition may not be established by a simple single closing of a switch because this might be effected carelessly or accidentally. The run-down condition is only established by plural closings of a switch. Gate means are provided within the control system so that the plural actuations of the switch will establish the run-down condition and this may be established only when the door is in the stop-up condition. The plural actuations of the switch must take place within a predetermined time period in order to establish the run-down condition.