Title: Safety system

Abstract: Normally disabled electrical and mechanical devices are caused to be enabled to operate by remote control signals having predetermined distinctive characteristics, such signals originating from enabling control equipment transported by an authorized person or persons. Receiving equipment providing output enabling signals only in response to received signals having the predetermined distinctive characteristics is preferably made integral with the mechanical or electrical devices involved and is coupled through appropriate electronic or electro-mechanical devices to the disabling means in the mechanical or electrical devices to be enabled.

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Other info:

Inventors: Barker, James N. (Ontario, CA, US)
Cartwright, Edward A. (Montclair, CA, US)

Application Number: 620357
Filing Date: 1975-10-07
Publication_date: 1977-01-18
Assignee: Precision Thin Film Corporation (Los Angeles, CA)
Primary Class(es): 42/70.01 42/70.11
Other Classes:
US Patent Ref:

1076530	Oct, 1913	Tepins	42/84.
3400393	Sep, 1968	Ash	42/84.
3553877	Jan, 1971	Welch et al.	42/70.
3673725	Jul, 1972	Cravener	42/70.
3725939	Apr, 1973	Saltzstein	70/277.

Other Refs:
Primary Examiner: Jordan, Charles T.
Assistant Examiner:
Attorney: Bissell; Henry M.