US4123694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for a wiper driving motor
Assignee: ITT Inc
•
Filing: 1976-12-29
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Granted: 1978-10-31
•
Expires: 1996-12-29
Abstract
Abstract A circuit arrangement for a wiper motor, of the type comprising a controllable switching element for switching a motor operating circuit, wherein the switching element is controllable by a manually actuable operating switch and by a disconnection signal of a limit switch. The disconnection signal of the limit switch is directly conducted to the switching element through the motor supply lead itself. Thus, an inexpensive single-conductor cabling arrangement is realized.
Inventors
- 👤 Marcel Andrei-Alexandru
- 👤 Gunther Gille
- 👤 Horst Goertler
- 👤 Hans Prohaska
- 👤 Walter Steeb
- 👤 Wolfgang Spieth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:10
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/08; Y; Y10; Y10S; Y10S318/00; Y10S318/02
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
116 words
A circuit arrangement for driving a wiper motor, comprising: a controllable switching element for switching a motor operating circuit, a limit switch having a pair of normally closed contacts serially coupled with said switch element and said limit switch being mechanically coupled to the output of said wiper motor and being responsive thereto to open said normally closed contacts during a portion of the operating cycle of said wiper motor to provide a disconnection signal, said switching element being controllable by a manually actuable operating switch and by said disconnection signal of said limit switch, and wherein the disconnection signal of the limit switch is directly conducted to the switching element through the motor supply lead.
Claim 2
Dependent Claim
116 words
A circuit arrangement for driving a wiper motor, comprising: a controllable switching element for switching a motor operating circuit, a limit switch having a pair of normally closed contacts serially coupled with said switch element and said limit switch being mechanically coupled to the output of said wiper motor and being responsive thereto to open said normally closed contacts during a portion of the operating cycle of said wiper motor to provide a disconnection signal, said switching element being controllable by a manually actuable operating switch and by said disconnection signal of said limit switch, and wherein the disconnection signal of the limit switch is directly conducted to the switching element through the motor supply lead.
Claim 3
Dependent Claim
35 words
The circuit arrangement according to claim 1, wherein the limit switch is a circuit-breaker which is directly connected with the motor supply lead and the switching element responds to a change in the motor current.
Claim 4
Dependent Claim
37 words
The circuit arrangement according to claim 2, wherein the switching element is operated as a storage unit which maintains the motor current until it is interrupted by the limit switch when the operating switch is switched off.
Claim 5
Dependent Claim
47 words
The circuit arrangement according to claim 3, wherein the switching element is a current relay the winding of which is series connected with the limit switch to the motor operating circuit and the movable switching contact of which closes the motor operating circuit in the operating position.
Claim 6
Dependent Claim
29 words
The circuit arrangement according to claim 4, wherein the movable switching contacts may be directly changed over into the operating position by a driver rod of the operating switch.
Claim 7
Dependent Claim
23 words
The circuit arrangement according to claim 4, characterized wherein the switching path is bridged through the movable switching contact of the operating switch.
Claim 8
Dependent Claim
24 words
The circuit arrangement according to claim 6, wherein in the rest position the movable switching contact closes a short circuit for the driving motor.
Claim 9
Dependent Claim
26 words
The circuit arrangement according to claim 7, wherein the current relay is provided with an auxiliary winding which may be energized through the movable switching contact.
Claim 10
Dependent Claim
25 words
The circuit arrangement according to claim 1, wherein the switching element is a thyristor the firing circuit of which is controllable through the operating switch.
Claim 11
Dependent Claim
22 words
The circuit arrangement according to claim 9, wherein the switching path of the limit switch is bridged by a by-pass switching element.
Claim 12
Dependent Claim
15 words
The circuit arrangement according to claim 10, wherein the by-pass switching element is a resistor.
Claim 13
Dependent Claim
15 words
The circuit arrangement according to claim 10, wherein the by-pass switching element is a relay.
Claim 14
Dependent Claim
27 words
The circuit arrangement according to claim 10, wherein the by-pass switching element is a bimetal switch the filament winding of which is connected with the motor circuit.
Claim 15
Dependent Claim
32 words
The circuit arrangement according to claim 13, wherein the filament winding is serially connected with the limit switch and the switching path of the bimetal switch is closed in its rest position.
Claim 16
Dependent Claim
33 words
The circuit arrangement according to claim 13, wherein the filament winding is connected in parallel to the limit switch and the switching path of the bimetal switch is opened in its rest position.
Claim 17
Dependent Claim
33 words
The circuit arrangement according to claim 13, wherein the bimetal switch also provides an overcurrent circuit-breaker and is further provided with an additional set of contacts connected in series with the limit switch.
Claim 18
Dependent Claim
25 words
The circuit arrangement according to claim 1, wherein the limit switch is monostable in which during the instable switching phase changes interrupts the motor current.
Claim 19
Dependent Claim
43 words
The circuit arrangement according to claim 17, wherein the limit switch includes an energy storage unit which is charged in the stable switching phase and the energy of which is released in the instable switching phase provides a short duration interruption of current.
Claim 20
Dependent Claim
16 words
The circuit arrangement according to claim 18, wherein a spring element provides said energy storage unit.
Claim 21
Dependent Claim
71 words
The circuit arrangement according to claim 19, wherein the limit switch includes a pendulum which may be deflected against the tension of the spring element from a rest position in the stable switching phase, whereby the spring element is initially tensioned, and said pendulum in the instable switching phase swings beyond the rest position in reverse direction and thereby for a short duration removes a contact spring from a stationary contact.
Claim 22
Dependent Claim
43 words
The circuit arrangement according to claim 19, wherein a contact spring directly provides an energy storage unit which rests on a contact path of a switch wafer in the stable switching phase and slides over a contact gap in the instable switching phase.
Claim 23
Dependent Claim
50 words
The circuit arrangement according to claim 21, wherein the contact spring is deflected by an eccentric cam on the switch wafer in the plane of the contact path transversally to its longitudinal direction and that it is thereby initially tensioned and slides over a contact gap when it springs back.
Claim 24
Dependent Claim
53 words
The circuit arrangement according to claim 21, wherein the contact spring is deflected by a switching cam with an ascending contact flank projecting from the plane of the contact path so that it is thereby initially tensioned and during its springing back slides over the inclined flank being provided with a contact gap.
Claim 25
Dependent Claim
54 words
The circuit arrangement according to claim 21, wherein the contact spring is deflected and thereby initially tensioned by a tripping pin mounted on the switch wafer in guide motion of the contact path and during its springing back slides over a contact gap in opposite direction to the guide motion of the contact path.
Claim 26
Dependent Claim
39 words
The circuit arrangement according to claim 21, wherein said contact spring is provided with a generally U-shaped free end thereof for initially tension engaging a recess of the contact path and which during untensioning slides over a contact gap.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |