Key operated security switch to prevent unauthorized use of equi

Details Key operated security switch to prevent unauthorized use of equi Key operated security switch to prevent unauthorized use of equi

1984-03-21

1985-11-12

Marcus, Stephen

Electricity: circuit makers and breakers

Switch activation inhibitor

Removable actuator

200292, 70360, H01H 2708

Patent

active

045530068

ABSTRACT:
A key operated security switch has a housing containing a fixed contact. The housing has a slider provided with contact means movable therewith for slidable, non-rotary movement in the housing. A plurality of locking pins are slidably mounted in recesses formed in the housing and are spring-urged partly into the housing and partly into said slider so as to lock the slider relative to the housing. A plurality of plungers engage at one end with the adjacent ends of said locking pins and at the other end are engageable by the stepped edge of a key inserted into the slot of a barrel rotatably mounted in the housing. The stepped edge of the key projects through the slot of the barrel but does not engage the plungers during insertion or withdrawal. Rotation of the barrel by the key after insertion brings the stepped edge of the key into engagement with at least some of the adjacent ends of the plungers in order to depress them and move the associated locking pins so that none of the locking pins will project into the slider, thereby permitting sliding movement of the slider. Turning movement of the barrel also engages the barrel with the slider whereby axial movement of the barrel and the key will effect similar sliding movement of said slider.

REFERENCES:
patent: 2011944 (1935-08-01), Lodispoto
patent: 2910860 (1959-11-01), Camba
patent: 4099395 (1978-07-01), Garza
patent: 4146761 (1979-03-01), Sung

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