Driver alert device
AssigneeLawrence Peska Associates, Inc.
InventorGlenfield Warner
Life of this patent
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Abstract
Alert apparatus worn by a driver includes a motion responsive switch including a pendant wiper associated with a plurality of closely spaced contacts surrounded by an auxiliary contact. A plurality of resistors of different values are respectively coupled to different ones of the contacts for randomly placing different ones of the resistors in a circuit for charging a selected capacitor coupled to the wiper. An amplifier and switching circuit energizes an alarm when the capacitor is charged to a predetermined level and the auxiliary contact is coupled to the capacitor to enable its discharge as the wiper is accellerated against the auxiliary contact in response to deliberate shaking movement by the operator.
Claims5
An alarm system for keeping alert a motor vehicle operator which comprises:
- an alarm, a motion switch responsive to movements of the vehicle operator, and which switch includes a plurality of contacts disposed for random contact with a pendant, and means for periodically initiating and terminating operation of said alarm responsive to the position of said motion switch, said means for initiating and terminating including a first capacitor which is charged by an electric current passed through said pendent, a plurality of resistors of different value which are respectively connected to said plurality of contacts of said motion switch, said different resistance values causing charging of said first capacitor at varying rates.
Dependencies are inferred from the claim text.