Remote emergency power shutoff and alarm system
First Claim
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1. A remotely controllable shutoff and alarm system for use in connection with a machine, said shutoff and alarm system comprising:
- at least one portable transmitter comprising a signal generator and a manual reset switch, said signal generator capable of generating and transmitting a shutoff signal when activated by a user;
a receiver unit comprising a signal receiver and a manual reset switch, said receiver unit capable of receiving the shutoff signal from the transmitter, and being operable, when connected to said machine, to temporarily interrupt operation of at least a portion thereof; and
an alarm generator for generating an audible alarm in response to receipt of a shutoff signal by the receiver unit;
wherein the system will not allow normal operation of the machine to resume, after the shutoff signal has been sent by the transmitter, until both the manual reset switches of the transmitter and the receiver unit have been switched to a run position;
wherein the system is adapted for use with a movable machine having wheels and an engine.
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Abstract
A remotely controllable shutoff system is operable to temporarily disable a machine, for the safety of persons and property close to the machine. The system includes a remote transmitter assembly, equipped with a shutoff actuator, and a receiver unit also including a manual reset mechanism. When a shutoff signal is generated by the transmitter, the receiver unit is capable of immobilizing the machine or a designated section thereof. Operation of the machine may be resumed only after resetting at least one manual reset mechanism on the remote transmitter and/or the receiving unit.
88 Citations
16 Claims
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1. A remotely controllable shutoff and alarm system for use in connection with a machine, said shutoff and alarm system comprising:
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at least one portable transmitter comprising a signal generator and a manual reset switch, said signal generator capable of generating and transmitting a shutoff signal when activated by a user; a receiver unit comprising a signal receiver and a manual reset switch, said receiver unit capable of receiving the shutoff signal from the transmitter, and being operable, when connected to said machine, to temporarily interrupt operation of at least a portion thereof; and an alarm generator for generating an audible alarm in response to receipt of a shutoff signal by the receiver unit; wherein the system will not allow normal operation of the machine to resume, after the shutoff signal has been sent by the transmitter, until both the manual reset switches of the transmitter and the receiver unit have been switched to a run position; wherein the system is adapted for use with a movable machine having wheels and an engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A remotely controllable shutoff system for use in connection with a machine, said shutoff system comprising:
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at least two portable transmitters, each of said transmitters comprising a signal generator for generating and transmitting a shutoff signal when activated by a user;
wherein said signal generator comprises a pair of activation buttons connected in series so that both buttons must be activated simultaneously to generate said shutoff signal, and each of said transmitters further comprising a first reset switch; anda receiver unit, comprising a signal receiver and a second reset switch, said receiver unit capable of receiving the shutoff signal from each of the transmitters, and being operable, when connected to a machine, to interrupt operation of at least a portion thereof; wherein the system will not allow normal operation of the machine to resume, after the shutoff signal has been sent by any one of the transmitters, until the both the first and second reset switches have been switched to respective run positions; wherein the system is adapted for use with a movable machine having wheels and an engine. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification