Patent ID: 9222281
Filing Date: 2015-12-29
Classification: E05B,H01H,Y10T

Abstract:
1. A cylinder lock monitor for monitoring a position of a cylinder lock including a rotatable element having an axis of rotation, the cylinder lock monitor comprising: a cylinder lock monitor housing adapted to be positioned proximate to the rotating element of the cylinder lock, the cylinder lock monitor housing having an inner end and defining an inner cavity opening through the inner end of the housing; a plunger having an inner end and disposed in the cavity of the housing, the plunger configured for non-rotating axial movement relative to the housing along the axis of rotation of the rotatable element between a first position where the inner end of the plunger extends from the opening in the inner end of the housing and a second position where the inner end of the plunger is contiguous with the inner end of the housing; a spring disposed in the cavity of the housing for biasing the plunger toward the first position; and a switch operatively associated with the housing, the switch in electrical communication with an indicator and adapted to be reactive to any change in position of the rotatable element of the cylinder lock, wherein the inner end of the plunger is adapted to contact the rotatable element between and including the first and second positions of the plunger during rotation of the rotatable element relative to the plunger.