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Switch lock

  • US 4,890,467 A
  • Filed: 05/31/1988
  • Issued: 01/02/1990
  • Est. Priority Date: 05/31/1988
  • Status: Expired due to Term
First Claim
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1. A lock actuated switch comprising a housing and a lock cylinder, the housing including a terminal housing portion and a support portion, the terminal housing having a lower terminal end, the support portion having an open terminal end and being in integral coaxial relationship at its other end with the terminal housing portion, the support portion having a wall defining a longitudinal bore, the lock cylinder including a body portion, a switch portion and a shaft portion, the switch portion being integral with and extending axially from the body portion, the switch portion including a tubular housing portion, the tubular housing portion having a channel formed therein, the tubular housing portion having sides and having a first opening fabricated through one side thereof and a second opening fabricated through the other side thereof and in opposed relation with the first opening, the channel formed in the tubular housing portion opened at one side by the first opening and at the other side by the second opening, the channel having an upper inner surface, a lower inner surface and a pair of side surfaces, the upper and lower inner surfaces being in spaced parallel relation to each other and the pair of side surfaces being in spaced parallel relation to each other and in right angle relationship with the upper inner and lower inner surfaces a first stop portion extending from the lower inner surface adjacent the first opening and a second stop portion extending from the lower inner surface adjacent the second opening, a rectangular third stop portion extending from the upper inner surface adjacent the first opening and a fourth stop portion extending downward from the upper inner surface adjacent the second opening, a first contact holder comprising a back, the back having a first side edge and a second side edge, a first arm extending in right angle relation from the first side edge thereof and a second arm extending in right angle relation from the second side edge, each of the arms including an open key hole slot, the arms being in spaced parallel relation to each other and each of them having an external surface, the external surface of the first arm including an integral ramp portion positioned on one side thereof, the ramp portion merging therewith in close proximity to the back and terminated at its other end by a first stop remote from the back, the external surface of the second arm including an integral wedge shaped ramp portion positioned on the the external surface, merging into the external surface in close proximity to the back and terminating at its other end by a second stop remote from the back, a first movable contact moveable mounted in the area defined by the back, first arm and second arm of the first contact holder and the housing having fixed contacts, the first moveable contact engaging the fixed contact, a second contact holder of similar construction as the first contact holder and having a second movable contact mounted therein, the second movable contact similar in all respects to the first movable contact, the assembly of first contact holder and first movable contact positioned within the channel of the switch portion with the first stop of the ramp portion abutting the fourth stop portion of the upper inner surface, the second stop of the ramp portion abutting the second stop portion of the lower inner surface and a portion of the first movable contact extending through the second opening, a helical spring having a first terminal end and a second terminal end being positioned within the cavity of the switch portion with first terminal end bearing against the back of the first contact holder and the second terminal end bearing against the back of the second contact holder, the assembly of the second contact holder and second movable contact being positioned within the cavity of the switch portion with the first stop bearing against the third stop portion and the second stop abutting the first stop portion of the lower inner surface and a portion of the second movable contact extending through the first opening, the first and second moveable contact engaging the fixed terminals.

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