Patents Assigned to Airtech Limited
  • Detection of unsafe voltages on mobile equipment
    Patent number: 4791517
    Abstract: Protective equipment detects the existence of an unsafe potential (V.sub.2) between earth and mobile equipment such as a mobile cabin. A metal plate (14) is mounted below the chassis (10) of the cabin, and the voltage (V.sub.3) between the metal plate (14) and the chassis (10) is detected by an amplifier (16). The amplifier output feeds a threshold detector (18) which senses when the voltage (V.sub.3) reaches a level corresponding to a predetermined dangerous potential (V.sub.2) of the chassis (10) with respect to ground (12).
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: December 13, 1988
    Assignee: Airtech Limited
    Inventor: Jeffrey Park