Title: Door interlock security device

Abstract: A transfer-chamber two-door interlock security device includes a rocker arm which can be rocked between first and second door locking positions. If the rocker arm is in a first-door locking position and the second door is opened, a latch flange on the rocker arm engages an edge of the open door to thereby prevent the rocker arm from rocking.

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Inventors: Jett, III, Edgar A. (Richmond, VA, US)
Phillips, Maurice L. (Richmond, VA, US)

Application Number: 601668
Filing Date: 1975-08-04
Publication_date: 1977-03-15
Assignee: Carmine Foods, Inc. (Richmond, VA)
Primary Class(es): 49/68 292/218
Other Classes:
US Patent Ref:

356269	Jan, 1887	Branch	292/218.
1603404	Oct, 1926	Proctor	49/68.
1632683	Jun, 1927	Tracy	49/68.
3174193	Mar, 1965	Smith	49/68.

Other Refs:
Primary Examiner: Downey, Kenneth
Assistant Examiner:
Attorney: Griffin, Branigan and Butler