Electricity: motive power systems – Periodic – repetitious or successive operations control of... – Variable periods or intervals between controlling operations
Patent
1976-01-27
1977-07-19
Schaefer, Robert K.
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
Variable periods or intervals between controlling operations
318443, 318DIG2, 307 10R, 1525012, H02P 700
Patent
active
040371468
ABSTRACT:
A wiper switch of a wiper assembly includes a stopping position contact, an intermittent wiping position contact and a low-speed position contact which are respectively connected to a memory circuit, a trigger circuit and a preference circuit, wherein when the wiper switch is transferred from the stopping position to the intermittent wiping position the memory circuit generates a low level signal, whereas the memory circuit generates a high level signal when the wiper switch is transferred from the low-speed wiping position to the intermittent wiping position. A flip-flop connected to the memory circuit and the preference circuit generates a low level signal or a high level signal depending on the closing sequence of the wiper switch. The oscillation time constant of an oscillator circuit connected to the flip-flop varies depending on whether the flip-flop is generating the low level signal or the high level signal and consequently the time constant for the intermittent wiping operation of the wiper assembly varies depending on the selected closing sequence of the wiper switch.
REFERENCES:
patent: 3407345 (1968-10-01), Fruehauf et al.
patent: 3487282 (1969-12-01), Gasiorek et al.
patent: 3549974 (1970-12-01), Bruegge
patent: 3745362 (1973-07-01), Ballou
patent: 3883845 (1974-09-01), Smallbone et al.
Indyk Eugene S.
Nippondenso Co. Ltd.
Schaefer Robert K.
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