Key and installation double cylinder for a security lock
OwnerErnst Kellerinventor
Life of this patent
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Abstract
A key and an installation double cylinder for a security lock is disclosed with two cylinder halves, a cylinder core and tumblers which are constructed as core pins and housing pins and can be brought into line by means of the key, which can be inserted into the keyway to release the cylinder core for rotation. The key has, at its bit, a lengthening element by which the tumblers in an oppositely located cylinder half can be brought into line for free turning. The cylinder half on the outside of the door can have a solid rotor of hardened steel which protects the cylinder half on the inside.
Claims12
A key and installation double cylinder for a security lock comprising:
- a key having a bit;
- a first cylinder half for positioning at an inner side of an access portal;
- a second cylinder half for positioning at an outer side of said access portal;
- a cylinder core and tumblers which are constructed as core pins and housing pins and can be brought into line by means of said key, said tumblers being located in said first cylinder half only, said second cylinder half being free of core pins and housing pins, said cylinder core including a rotor disposed in said second cylinder, said rotor being solid except for a keyway;
- said key for being inserted into the keyway to release the cylinder core for rotation;
- said key having, at its bit, a lengthening element by which the tumblers in an oppositely located cylinder half can be brought into line for free turning upon an insertion of said key from an outer side of the double cylinder, said key having a standard element which is disposed in said rotor upon insertion of said key from the outer side of the double cylinder, said lengthening element being connected by a swivel to said standard element.
Dependencies are inferred from the claim text.