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US 4,867,496 AGranted
Electrically operable strike
AssigneeTrine Products Corporation
InventorJay J. Thomas
Life of this patent
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AssigneeTrine Products Corporation
InventorJay J. Thomas
Estimating the term…
A fire rated electrically operable strike in which a pivotable keeper is prevented from pivoting by a locking member which is spring biased into a position in which pivoting of the keeper is prevented until the locking member is moved from its normal, locking position by the electrical energization of a solenoid which actuates an armature connected to the locking member. The locking member has a recess into which a spring biased ball extends when the locking member is in its locking position. The materials from which the ball and its mounting are made and the relative dimensions thereof are selected so that when the temperature to which the strike is subjected is greater than normal, such as by reason of a fire, but less than a temperature at which the locking member biasing spring is ineffective, the ball expands and the mounting for the ball changes size so that the ball cannot retract from the recess in the locking member, and the locking member is held in its keeper locking position.
In an electrically operable strike comprising a keeper movable from a first, locked position to a second release position, a locking member movable from a first position in which it prevents movement of said keeper from its said first position to a second position in which said keeper is permitted to move into its said second position and electrically energizable solenoid means connected to said locking member for moving said locking member from its said first position to its said second position, the improvement comprising thermally responsive detent means actuated when the temperature exceeds 600.degree. F., said detent means engaging said locking member at least upon actuation and preventing movement of said locking member from its said first position to its said second position.
In an electrically operable strike comprising a keeper movable from a first, locked position to a second, release position, a locking member movable from a first position in which it prevents movement of said keeper from its said first position to a second position in which said keeper is permitted to move into its said second position, a face plate and electrically energizable solenoid means connected to said locking member for moving said locking member from its said first position to its said second position, the improvement comprising a case adjustably mounted on said face plate for movement toward and away from the face of said face plate and wherein said keeper and said locking member are movably mounted on said case.
Dependencies are inferred from the claim text.