Patent ID: 6750780
Filing Date: 2004-06-15
Classification: G08C

Abstract:
A remote control device for a machine comprising:a transmitter separate from the machine at the disposal of an operator; a receiver on the machine including an accomplishment circuit operatively connected with the machine; wherein said transmitter includes a first transmitting section of luminous infrared waves and a second transmitting section of electromagnetic waves which cooperate with said receiver; and wherein said receiver includes a first receiving section of luminous infrared waves and a second receiving section of electromagnetic waves, said receiver including electronic means for producing a permission signal for activation of said accomplishment circuit only if said first receiving section receives said luminous infrared waves emitted by said first transmitting section, electromagnetic waves can then be transmitted through said accomplishment circuit of said second receiving section only after receiving and only as long said luminous infrared waves are received through said first receiving section.