Communications: electrical – Digital comparator systems
Patent
1975-06-09
1976-08-17
Pitts, Harold I.
Communications: electrical
Digital comparator systems
235 617R, H04Q 300
Patent
active
039757137
ABSTRACT:
The device to generate signals to actuate electronic switches of the present invention has as its object to control the starting and duration of operation of a load connected to a power source and is actuated upon introducing a coded magnetic recording medium into a logic circuit comparator having a predetermined code; if the codes of the magnetic recording medium and the comparator coincide, a luminous electronic component is turned on to advise the user that he can operate a lever connected to a perforator which perforates the recording medium and sends a signal which combines with a coinciding signal generated by the logic circuit comparator when its code coincides with that of the magnetic recording medium introduced. This combined signal actuates a first programmable timer connected between the load and the electronic switch permitting supplying the load for a given time period. There is also included a second programmable timer connected to the electronic switch which permits initial supplying to the load through a switch having positionable electric contacts connected to the load input.
REFERENCES:
patent: 3344258 (1967-09-01), Michels
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