Frangible Guard Or Protector For Key Patents (Class 340/302)
  • Patent number: 6774809
    Abstract: A PC card slot and an information processing device using the PC card slot are provided which are capable of having a user recognize a state of a PC card so that the user should not pull out the PC card carelessly or accidentally during access to the PC card or before completion of software termination procedures. The PC card slot is equipped with a PC card interface and a light emitting unit which goes on or off in response to a state of the PC card connected to the PC card interface.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: August 10, 2004
    Assignee: NEC Corporation
    Inventor: Yoshiaki Fukazawa
  • Patent number: 6304830
    Abstract: An automatic keyboard testing apparatus includes a pair of support arms fixed to a machine frame for supporting a keyboard to be tested therebetween. A clamping device secures the keyboard between the support arms. A test module has testing units for operating/testing pushbuttons, a knob and indictors of the keyboard. A key actuating device comprises a plurality of key depressing elements movably mounted thereto. Each key depressing element forms a pressurized air stream outlet for applying a pressurized air stream to a corresponding key of the keyboard for actuating the key. A conveyor mechanism moves the key actuating device across the keyboard for sequentially actuating the keys of the keyboard. A keyboard coupling device electrically couples the keyboard to a processor-based determination device to receive signals therefrom for determining if the tested keyboard is properly functioning.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: October 16, 2001
    Assignee: Behavior Tech Computer Corp.
    Inventor: Kevin Lee
  • Patent number: 5835014
    Abstract: Protection of manual override lock and key systems for an electronic security system is provided by an annunciator system which is activated when access to a manual override keyhole is attempted.
    Type: Grant
    Filed: May 15, 1995
    Date of Patent: November 10, 1998
    Inventor: Peter S. Morello
  • Patent number: 4267549
    Abstract: A fire alarm pull station protector is provided comprising a wall mounted framing member and a cover adapted to abuttingly engage the framing member. The cover is pivotally connected to the framing member by hinge means having a laterally displacement pivotal axis to permit the cover to remain disengaged from the framing member once the cover has been opened to gain access to the fire alarm pull station. The cover includes a first, preferably opaque, portion which conceals a local alarm and switch unit, as well as a substantially transparent portion which provides a substantially unobstructed view of the pull station.
    Type: Grant
    Filed: January 31, 1980
    Date of Patent: May 12, 1981
    Inventor: John D. Taylor