Locks – Special application – For control and machine elements
Reexamination Certificate
1999-12-16
2001-12-25
Gall, Lloyd A. (Department: 3627)
Locks
Special application
For control and machine elements
C070S093000, C070S416000, C070S429000, C292S264000
Reexamination Certificate
active
06332344
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates, in general, to security chains, and, in particular, to security chains which are attached to deadbolts.
DESCRIPTION OF THE PRIOR ART
In the prior art various types of security chains have been proposed. For example, U.S. Pat. No. 2,970,465 to Falk, Jr. et al discloses a security chain which is secured on the door frame adjacent the door and which has a projection on the end of the chain which is engaged with a fastener on the door to prevent the door from being completely opened.
The patent to Golden discloses a security chain which is secured on the door frame adjacent the door and which has a projection on the end of the chain which is engaged with a dead bolt lock.
The patent to Kaden discloses a security chain which is secured on the door frame adjacent the door and which has a loop on the end of the chain which is engaged with the door knob to prevent the door from being completely opened.
The patent to Nakanishi discloses a security chain which is secured on the door frame adjacent the door and which has a loop on the end of the chain which is engaged with the knob on a dead bolt to prevent the door from being completely opened.
SUMMARY OF THE INVENTION
The present invention is directed to a security device which is mounted on a door adjacent a deadbolt lock. The security device is a chain which will have a ring at one end which is passed around the knob on the deadbolt to prevent the deadbolt knob from being turned and, therefore, opened.
It is an object of the present invention to provide a new and improved security chain for a deadbolt lock.
It is an object of the present invention to provide a new and improved security chain for a deadbolt lock which can be installed on any door.
It is an object of the present invention to provide a new and improved security chain for a deadbolt lock which will prevent the deadbolt lock from being operated.
These and other objects and advantages of the present invention will be fully apparent from the following description, when taken in connection with the annexed drawings.
REFERENCES:
patent: 1074359 (1913-09-01), Heimbaugh
patent: 1700135 (1929-01-01), Lanes
patent: 1715295 (1929-05-01), Kaden
patent: 2798753 (1957-07-01), Wade
patent: 2935864 (1960-05-01), Golden
patent: 2970465 (1961-02-01), Falk, Jr. et al.
patent: 3263462 (1966-08-01), Suroff et al.
patent: 3414306 (1968-12-01), Bernstein
patent: 3423974 (1969-01-01), Bernsley
patent: 3451708 (1969-06-01), Brooks
patent: 3853343 (1974-12-01), Hunter
patent: 4106800 (1978-08-01), Nakanishi
patent: 4827745 (1989-05-01), Baugh
patent: 5193373 (1993-03-01), Hunt
patent: 5327632 (1994-07-01), Moore
patent: 5465595 (1995-11-01), Sheppard
patent: 5651279 (1997-07-01), Berton et al.
patent: 5950465 (1999-09-01), Schultz et al.
patent: 6182485 (2001-02-01), Moore
patent: 338136 (1921-06-01), None
patent: 916488 (1946-08-01), None
patent: 154980 (1920-12-01), None
patent: 351049 (1931-06-01), None
patent: 2130634 (1984-06-01), None
patent: 2269203 A (1994-02-01), None
Gall Lloyd A.
McGlynn Joseph H.
Patent & Trademark Services
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