Recording unit
AssigneeHugin Kassaregister AB
InventorSven Englund
Life of this patent
Estimating the term…
Abstract
A cylinder lock wherein the insertion and rotation of a selected one of associated keys results in a projection of certain pins, mounted in a row parallel to the axis of the cylinder, radially beyond the cylinder surface in response to the irregularities of the key. The displaced pins effect a closing of contacts in a pattern to produce selected circuit functions. According to the invention the pins, when activated, deflect overlying respective parallel flexible wires extending transversely of the pin row. The deflected wires urge, via an insulated member, overlying movable contact reeds to engage overlying fixed contact members, so that circuits are closed as determined by the irregularities of the key.
Claims7
A key-operated switch comprising:
- a block having a bore therein;
- a key-operated cylinder rotatably mounted in the bore of said block, said cylinder adapted to receive any of a plurality of associated keys,
- a row of pins mounted in a row parallel to the axis of said cylinder and adapted for sliding radial movement within said cylinder, said pins adapted to be displaced and project beyond the surface of said cylinder, said displacements corresponding to the irregularities of a selected key when inserted in said cylinder;
- a set of spring members including parallel sections of flexible wire mounted on said block, each of said wire sections extending across the path of travel of a corresponding one of said pins and in a direction transverse to said pin row;
- a set of contact reeds mounted on said block and adjacent said spring member, each of said reeds aligned with a corresponding one of said pins and being adapted for displacement responsive to displacement of said corresponding spring member;
- insulating means for electrically insulating said spring members from said contact reeds;
- and
- a set of contact members fixedly mounted on said block and adjacent said contact reeds, each of said contact members being aligned with a corresponding contact reed, and being positioned to contact said corresponding contact reed displaced by said corresponding spring member when a key is inserted in said cylinder.
Dependencies are inferred from the claim text.