Showcase lock for sliding doors

A lock for use on by-passing type doors to lock the doors in a closed position with adjacent end portions to the doors in spaced overlapping relation, the lock comprising, an elongated keeper plate, means for mounting the keeper plate on one of the doors with one side of the plate overlying one face of that door, a pair of keeper flanges along opposite side edges of the keeper plate projecting inwardly toward each other and spaced from the other side of the keeper plate to define a pair of opposed lengthwise extending grooves at said other side of the keeper plate opening toward each other, means defining a row of stops at said other side of the keeper plate intermediate the keeper flanges, a lock housing having means defining a pair of parallel housing flanges disposed in a plane at one side of the housing and projecting outwardly away from each other and dimensioned to be slidably received in the pair of lengthwise extending grooves in the keeper plate, the lock housing being engageable with an edge of the other door when the housing flanges are disposed in the grooves in the keeper plate, said lock housing having a plug bore therein disposed perpendicular to the plane of said housing flanges and a lock cavity at the inner end of said plug bore, a key operated plug mounted for turning in said plug bore, latch means at said one side of the housing intermediate said housing flanges and adapted to engage the stops on the keeper plate, said latch means including a generally U-shaped spring member having a latch arm and an actuator arm resiliently interconnected at one end by a bight portion, means mounting said U-shaped spring member in the lock cavity with the actuator arm extending crosswise of the axis of the plug bore adjacent the inner end of the key operated plug and with the latch arm extending crosswise of the axis of the plug bore and spaced relatively farther from the inner end of the key operated plug, means mounting said latch arm on the lock housing for rocking movement about an axis intermediate its ends and crosswise of a plane through latch arm and actuator arm, and cam means on the end of the key operated plug engageable with the actuator arm for tilting the actuator arm in response to turning of the key operated plug to move the latch means between a latch position for engaging the stops and a release position for disengaging the stops.

A lock for use on by-passing type doors to lock the doors in a closed position with adjacent end portions to the doors in spaced overlapping relation, the lock comprising, an elongated keeper plate, means for mounting the keeper plate on one face of that door, a pair of keeper flanges along opposite side edges of the keeper plate projecting inwardly toward each other and spaced from the other side of the keeper plate to define a pair of opposed lengthwise extending grooves at said other side of the keeper plate opening toward each other, means defining a row of stops at said other side of the keeper plate intermediate the keeper flanges, a lock housing formed of an impact resistant synthetic resin material, a metal face plate fixedly attached to the housing at one side thereof and having relatively parallel opposite side edge portions defining a pair of parallel housing flanges fixed to the housing and disposed in a plane at said one side of the housing and projecting outwardly away from each other and dimensioned to be slidably received in the pair of lengthwise extending grooves in the keeper plate to slidably support the housing on the keeper plate, the lock housing being engageable with an edge of the other door when the housing flanges are disposed in the grooves in the keeper plate, latch means at said one side of the housing intermediate said housing flanges and adapted to engage said stops on the keeper plate, a key operated plug mounted for turning only in said lock housing, and means responsive to turning of said key operated plug for moving said latch means relative to said housing flanges in a direction transverse to the plate thereof between a latch position for engaging the stops and a release position for disengaging the stops.

A lock for use on by-passing type closure doors to lock the doors in a closed position with adjacent end portions of the doors in spaced overlapping relation, the lock comprising, an elongated keeper member having means defining a row of stops therealong, means for mounting the keeper member on one of the doors, a lock housing having guide means at one side thereof for guidably engaging said keeper member, said lock housing having a plug bore therein disposed perpendicular to said one side of the housing and a lock cavity at the inner end of the plug bore, a key operated plug turnable in said plug bore, a latch comprising a generally U-shaped spring member having an elongated latch arm and an elongated actuator arm integrally interconnected at one end by a bight portion, means mounting the U-shaped spring member in the lock cavity with the actuator arm extending crosswise of the axis of the plug bore adjacent the inner end of the key operated plug and with the latch arm extending crosswise of the axis of the plug bore and spaced relatively farther from the inner end of the key operated plug, said means mounting the U-shaped spring member in lock cavity including means mounting the latch arm on the housing for rocking movement about an axis intermediate the ends of the latch arm and crosswise of plane through the latch and actuator arms, and cam means on the end of the key operated plug engageable with the actuator arm for tilting the actuator arm in response in turning of the key operated plug.