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:
Mar. 15, 1983
Filed:
Jan. 21, 1981
George M Burgess, Webster, NY (US);
John D. Brush & Co., Inc., Rochester, NY (US);
Abstract
A combination lock to be installed on a panel such as a safe door, with a manually operable knob and dial at the front of the panel and the main part of the combination mechanism at the rear of the panel. A rotary operating spindle attached to the dial and a stationary bushing surrounding the spindle extend through the thickness of the panel and are made of non-metallic material having low heat conductivity, such as nylon. An operating or driving wheel or disk fixed to the rear end of the spindle has a projection for engaging and rotating a locking wheel or disk rotatable on the bushing in front of the operating disk, and this locking wheel engages and rotates another locking wheel in front of it. When radial slots in the locking wheel and the operating wheel are all in a predetermined alignment, a spring moves a finger on a slide member into the aligned slots, and this moves the latch bolt to an unlocked position. A cam portion on the operating disk moves the slide member back to normal locking position when the dial is turned. A spring connection between the latch bolt and the slide member allows the latch bolt to retract even though the locking disk slots are not aligned for unlocking, so the safe door may be closed even when the lock is in locked position.