Roto Frank Eisenwarenfabrik Aktiengesellschaft

Roto Frank Eisenwarenfabrik Aktien

Manfred Hotzl

Latch-operable multibolt lock

An electromechanical lock system has a lock cylinder including a body, a rotatable core forming a key passage, and carrying at least one magnet, tumblers engageable between the core and the body and shiftable between positions blocking rotation of the core in the body and freeing positions permitting such rotation, a sensor juxtaposable with the magnet in an angular position of the core in the body, anda coupling member juxtaposed with an inner end of the core, forming an inner extension of the passage, and rotatable in the body independently of the core. A mechanically operable element is coupled mechanically to the coupling member and an electrically operable element is coupled electrically to the sensor. A long key engageable in the passage has a bitting fittable with the tumblers to set same in the freeing positions and is of a length sufficient to reach into the coupling member so that insertion of the long key fully into the passage and subsequent rotation of the key turns the core and the coupling member to operate both the mechanical and electrical elements. A short key engageable in the passage has a bitting fittable with the tumblers to set same in the freeing positions and is of a length insufficient to reach into the coupling member so that insertion of the short key fully into the passage and subsequent rotation of the key turns only the core to operate only the electrical element while not operating the mechanical element.

Electromechanical lock system

A door lock having upper and lower vertically spaced actuator seats centered on respective vertically spaced upper and lower axes has a handle assembly having inner and outer mounting plates horizontally flanking the door lock. An upper stem fitted in the upper actuator seat and supported on the inner plate can rotate about the upper actuator axis and carries an inner handle. A lower stem fitted in the lower actuator seat and supported on the outer plate can rotate about the lower axis. An outer stem separate from the inner stem and supported on the outer plate can rotate about the upper axis coaxially with the inner stem and carries an outer handle. Gearing interconnects the outer and lower stems for rotation of the lower stem about the lower axis on rotation of the outer stem about the upper axis.

Handle assembly for dual-stem door lock

A lock assembly has a main lock housing, a bolt movable in the housing between a locked position projecting from the housing and an unlocked position largely recessed in the housing and a double cylinder having an outside key-operable part rotatable by an appropriately bitted key and an inside part rotatable by the outside part and also rotatable independently of the outside part. The inside part carries an actuator movable on rotation of either part. A gear linkage between the actuator and the bolt displaces the bolt. A secondary housing is provided adjacent the lock housing and an actuator element coupled and movable with the linkage extends from the lock housing to the secondary housing. The element moves relative to the secondary housing on movement of the bolt between its positions. An electric motor on the secondary housing connected to the element is energizable for displacing same and thereby also displacing the bolt between its positions. A key-operated switch connected to the electric motor energizes this motor to allow electrical as well as manual actuation of the locking same.

Electrically and manually key-controlled lock

A lock assembly has a main lock housing, a bolt movable in the housing between a locked position projecting from the housing and an unlocked position largely recessed in the housing, a key-operable mechanism having an actuator movable by turning of an appropriately bitted key in the mechanism, and a linkage between the actuator and the bolt for displacing the bolt by means of the actuator. A secondary housing is provided adjacent the lock housing and an actuator element coupled and movable with the linkage extends from the lock housing to the secondary housing. The element moves in one direction relative to the secondary housing on movement of the bolt from the locked to the unlocked position and in the opposite direction on movement of the bolt from the unlocked to the locked position. An electric motor on the secondary housing connected to the element is energizable for displacing same in both directions and thereby also displacing the bolt between its positions. Switches on the secondary housing juxtaposed with the element and connected to the motor detect movement of the element in either direction when actuated through the linkage by the key and energize the motor to move the element in the same direction it is already moving in.

Power-assist slide lock

A latch has a housing, a main bolt displaceable in the housing between a fully extended position projecting fully from the housing and a retracted position generally withdrawn into the housing, and a spring engaged between the main bolt and the housing for urging the main bolt with a predetermined spring force into the fully extended position. At least one secondary bolt is similarly displaceable relative to the housing between an extended and a retracted position. A lockout mechanism in the housing connected between the main bolt and the secondary bolt prevents the secondary bolt from being displaced from its withdrawn into its extended position except when the main bolt is in its fully extended position. The bolt is engageable in a keeper provided with a spring-loaded flap that inhibits the bolt from extending thereinto into its fully extended position and that normally retains it in an intermediate position.

Growing community of inventors

Graz, Austria

Manfred Hotzl