Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Patent
1982-01-25
1984-06-19
Scott, J. R.
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
200 617, 200 6181, 200 6182, 361 2, H01H 316
Patent
active
044554621
ABSTRACT:
A dual interlock switch assembly is provided which has particular although not exclusive application to X-ray units to prevent the unit from being energized whenever the access door is opened. The assembly includes a plug, formed of insulating material such as epoxy glass, mounted on the access door, and a tubular socket mounted on the cabinet which receives the plug when the door is closed. The plug has two mutually separated conductive segments bonded to its end, and one of the segments initially interconnects a first pair of spring-loaded conductive pins mounted in the socket, and the other segment subsequently interconnects a second pair of spring-loaded conductive pins mounted in the tubular socket as the door is closed, with the process being repeated in reverse when the door is opened. The conductive pins are connected into the circuitry of the X-ray unit in a manner such that the unit is de-energized when the door is opened and energized when the door is closed without arcing.
REFERENCES:
patent: 595963 (1897-12-01), McCaughey
patent: 2305749 (1942-12-01), Voigt
patent: 2437777 (1948-03-01), Zajc
patent: 3147468 (1964-09-01), Daniels
patent: 3627959 (1971-12-01), Chapell
patent: 3659063 (1972-04-01), Peterson
patent: 3729603 (1973-04-01), Foltz
patent: 3984733 (1976-10-01), DeLucia
Beecher Keith D.
Scott J. R.
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