Phototherapeutic device and method
DCFirst Claim
1. In a microprocessor to control a mechanism which performs timed intervals of work, the improvement comprising:
- means to control the length of time of each of said intervals of work;
means to shut down said mechanism upon expiration of said length of time; and
first failsafe means to monitor said microprocessor and said mechanism during said length of time and to shut down said mechanism during said length of time and to shut down said mechanism if a malfunction in said microprocessor or said mechanism is detected.
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Abstract
A microprocessor to control and to prevent failure in mechanisms, particularly those that perform timed intervals of work. The microprocessor controls the length of each interval of work, and limits the mechanism to perform only a predetermined number of work intervals, after which it deactivates the device, allowing the mechanism to reactivate only after entry of a coded number or operation of a key switch. The microprocessor monitors all functions of the mechanism and includes a first failsafe circuit that shuts down the mechanism in the event of malfunction. A second failsafe circuit monitors the first failsafe circuit, and bypasses it to shut down the mechanism in the event of malfunction in the first failsafe circuit.
24 Citations
8 Claims
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1. In a microprocessor to control a mechanism which performs timed intervals of work, the improvement comprising:
- means to control the length of time of each of said intervals of work;
means to shut down said mechanism upon expiration of said length of time; and
first failsafe means to monitor said microprocessor and said mechanism during said length of time and to shut down said mechanism during said length of time and to shut down said mechanism if a malfunction in said microprocessor or said mechanism is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- means to control the length of time of each of said intervals of work;
Specification