Switch for controlling door locks
OwnerDieter Reichertinventor
Life of this patent
Estimating the term…
Abstract
The switch comprises a stator which is rigidly secured to a lock cylinder case and a rotor which is rigidly fixed to a lock cylinder. The rotor rotates within the stator which has two concentric and partially overlapping circular arc conductors. The rotor drives an elliptical slip ring in a groove between the conductors and between one of the conductors and a slide surface where the conductors do not overlap. The frictional connection between the conductors and the slip ring holds the slip ring from being fully drawn out of contact with both conductors when the locking cyclinder is turned from closed to neutral position and holds the slip ring from being drawn into contact with both conductors when the locking cylinder is turned from open to neutral position.
Claims17
A switch for controlling door locks, which door locks comprise a non-rotatable locking cylinder case, a locking cylinder which can be rotated from outside by an inserted door key, a resetting spring for returning the locking cylinder to a neutral position from an "open" position and to the neutral position from a "closed" position, which switch comprises:
- a stator which is rigidly and non-rotatably connected to the locking cylinder case and is coaxial with the geometric longitudinal axis of the door lock,
- a rotor which is rigidly and non-rotatably connected to the locking cylinder of the door lock, is coaxial to the geometric longitudinal axis of the door lock and rotatably mounted by the stator and has a driver thereon,
- said stator being provided with two electric conductors of circular arc form which extend coaxially and concentrically with one another and overlap in a first angular section, but not in the second angular section, a non-conductive slide surface in the second angular section, and an electrically conductive slip ring between the conductors which contacts both the conductors and comprises an aperture in which said driver of said rotor engages,
- the frictional connection between said slip ring and said conductors and said slide surface being such that said slip ring can only be moved out of a position of rest by said driver,
- said slip ring and said aperture for engaging said driver having an angular length such that said slip ring is drawn between said conductors when the locking cylinder is turned into the "closed" position, but not fully drawn out of this position of contacting the conductors when the locking cylinder is returned to the neutral position, and such that the slip ring is drawn into the area of said slide surface when said locking cylinder is rotated into the "open" position, but not fully drawn out of this position, which does not make contact with at least one of said conductors, when the locking cylinder is returned to the neutral position.
Dependencies are inferred from the claim text.