The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Oct. 21, 1976
Russell W Waldo, St. Paul, MN (US);
Ideal Security Hardware Corporation, St. Paul, MN (US);
Abstract
An automatically locking crossbolt deadlock having a crossbolt yieldingly urged toward locking engagement with a cooperating strike when the deadlock and strike are mounted on a door and door frame respectively. An actuator lever releasably holds the crossbolt in a retracted or unlocking position while the door is open, and includes a portion which engages the strike, upon closing of the door, to cause the actuator lever to automatically release the crossbolt for movement into locking engagement with the strike. A cam and drive lever operate to move the crossbolt out of engagement with the strike to permit opening of the door, and a latch is engageable with the crossbolt, when the crossbolt is moved to its retracted position, to hold the same retracted until the door is opened and the actuating lever engages the crossbolt.