Patent ID: 6935663

Claim:
An electronically-operable door strike having a height, a width and a depth, comprising: a base to which is fixedly secured a pair of spaced apart support blocks each having an end panel; a shaft pin secured to said support blocks; a latch bolt keeper supported by and rotatable about said shaft pin; a turning spring mounted circumferentially around said shaft pin, said turning spring disposed to urge said latch bolt keeper into a latch bolt securing position; a stop lever pivotally secured at one end and having on its opposite free end a means for engaging the free end of a lock lever which is pivotally secured at one end opposite its said free end, said stop lever being urged into its engaging position with said lock lever by a spring and said lock lever being urged into its engaging position with said stop lever by a second spring, said stop lever and said lock lever when engaged preventing said latch bolt keeper from rotating about said shaft pin from the latch bolt securing position to a latch bolt releasing position; a solenoid, comprising (a) a shell having a ferrous metal front cap with a hole disposed therein and a rear cap of non-ferrous material with a hole disposed therein; (b) a wire coil wound on a spool within said shell; and (c) a plunger moveable within said spool and disposed within said holes in said front and rear caps to define a first air gap between said plunger and said spool, said plunger comprising a plunger tip of non-ferrous metal and a plunger body of ferrous metal; wherein said height of said door strike is about 1 11/16 inches, said width is about 1 1/32 inches and said depth is about 1 inch; and where upon said wire coil becoming electrically energized, said front cap acts as a magnet and pulls said plunger toward it causing a portion of said plunger tip to exit said front cap through the hole disposed therein and strike said lock lever, thus pivoting said lock lever until the lock lever is stopped by an end panel, thus defining a second air gap between said plunger body and said front cap, and disengaging said lock lever from said stop lever thereby permitting said latch bolt keeper to be rotated into said latch bolt releasing position.