Electricity: motive power systems – Periodic – repetitious or successive operations control of... – Variable periods or intervals between controlling operations
Patent
1982-09-07
1985-10-01
Shoop, Jr., William M.
Electricity: motive power systems
Periodic, repetitious or successive operations control of...
Variable periods or intervals between controlling operations
318DIG2, 15250C, H02P 104
Patent
active
045448701
ABSTRACT:
In an intermittent windshield wiper system in which the time between wiping cycles depends upon the degree of dryness of the windshield and upon the speed of the wiper blades on the downstroke of the wiping cycle toward the dwell position of the wiper blades, a circuit is provided to regulate the speed of the motor on the down stroke making use of the same transistor device that is used in controlling the energization of the motor to achieve intermittent operation. The motor is a three-brush motor and speed regulation is achieved by deriving signals from one or two of the brushes and applying it to the input electrode of the transistor device. The regulated speed of the motor can be manually controlled to provide a manual adjustment to the sensitivity of the system to the degree of dryness of the windshield. The motor may be electrodynamically braked at the end of each wiping cycle and the electrodynamic braking circuit is also used to apply reverse current to the motor when the windshield wiper system is turned off to drive the windshield wiper blades to a depressed park position.
REFERENCES:
patent: 3351836 (1967-11-01), Kearns
patent: 3458889 (1969-08-01), Tann
patent: 3483459 (1966-03-01), Kearns
patent: 3532952 (1970-10-01), Cagnon et al.
patent: 3581178 (1971-05-01), Kearns
patent: 3582747 (1971-06-01), Kearns
patent: 3602790 (1971-08-01), Kearns
patent: 3623181 (1971-11-01), Bailly
patent: 3721115 (1973-03-01), Kearns
patent: 3728603 (1973-04-01), Kearns
patent: 3774091 (1973-11-01), Kearns
patent: 3876919 (1975-04-01), Kearns
patent: 4158159 (1979-06-01), Orris et al.
patent: 4275477 (1981-06-01), Kato
patent: 4339698 (1982-07-01), Kearns
patent: 4494059 (1985-01-01), Kearns
Kearns Robert W.
Kearns Timothy B.
Kearns Robert W.
Ro Bentsu
Shoop Jr. William M.
LandOfFree
Intermittant windshield wiper control system with improved motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Intermittant windshield wiper control system with improved motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Intermittant windshield wiper control system with improved motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1444589