Patents by Inventor Jon D. C. McGregor

Jon D. C. McGregor has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4843850
    Abstract: The time release lock has three lock positions; open, a first locked position without time delay and a second locked position with time delay. The lock has a tongue which is withdrawn in the open position, extended to a certain extent in the first locked position and extended to a further extent in the second locked position. The lock can only be moved from the second locked position to the first locked position under influence of a timer.
    Type: Grant
    Filed: October 28, 1987
    Date of Patent: July 4, 1989
    Inventor: Jon D. C. McGregor
  • Patent number: 4425853
    Abstract: A cash safe having a receptacle to hold cash inserted through a slot, an opening for removal of cash from the receptacle, a closure positionable to cover the opening, a locking device for locking the closure in position, and a clockwork timer operable on actuation of the locking device to prevent the locking device from being deactuated for a time period. The cash safe in one embodiment is arranged for actuation of the locking device by turning a knob which also winds up the clockwork timer. A key lock is operable to latch the timer so that operation of the timer to begin the time period is inhibited until release of the key lock. In another embodiment a key lock actuates the locking device and at the same time winds up the timer which inhibits timing by the timer of the time period until the key lock is moved to a condition for opening the safe. Provision is also made for actuation of a marker device to mark the contents of the safe when the safe is removed from a surface on which it rests.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: January 17, 1984
    Inventors: Jon D. C. McGregor, Deanna E. Richards