Patent US3702959A successfully refreshed from Google Patents.
US3702959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control mounting, notably for motorized lift truck
Assignee: BREV ET D APPLIC TECHNOLOGIQUE
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Filing: 1971-04-07
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Granted: 1972-11-14
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Expires: 1991-04-07
Abstract
Abstract This electric mounting, including a coupler and a reversing switch, is intended primarily but not exclusively for controlling the operation of a fork lift truck and comprises essentially in a twin-battery and d.c. motor driving assembly incorporating a twoposition switch providing a low starting speed and a higher or normal travel speed, a reversing switch for operating the motor in either direction, and a safety cut-out switch adapted to be actuated by an obstacle likely to be struck by the front of the truck, a pair of relays of known type having a built-in front contact actuated by the inner end of its plunger core and to which a back contact is added on the outer end of said plunger core.
Inventors
- 👤 Andre Le Gloan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:29
CPC Classifications
B; B60; B60K; B60K1/00; B60L; B60L15/00; B60L15/02; B60L15/04; B61; B61L; B61L5/00; B61L5/10; H; H02; H02P; H02P7/00; H02P7/03; B60L2200/00; B60L2200/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
296 words
An electric mounting for controlling the energizing circuit of a d.c. motor for driving a movable element comprising a coupler for connecting two poles of said energizing circuit to first and second batteries of substantially identical characteristics, said first and second batteries each including a first terminal of one polarity and a second terminal of another polarity, said first terminal of said first battery being connected to said first pole of said energizing circuit and said second terminal of said second battery being connected to said second pole of said energizing circuit, said coupler including first and second relays each having a set of back contacts and a set of front contacts, the back contacts of said first and second relays on one side thereof being connected to each other, the back contact of said first relay on the other side thereof being connected to the first terminal of said second battery, the back contact of said second relay on the other side thereof being connected to the said second terminal of said first battery, the front contact of said first relay on one side thereof being connected to the second terminal of said second battery, the front contact of said first relay on the other side thereof being connected to the second terminal of said first battery, the front contact of said second relay on one side thereof being connected to the first terminal of said first battery, the front contact of said second relay on the other side thereof being connected to the first terminal of said second battery, and means to simultaneously energize said first and second relays for starting said movable mechanical element at low speed, and to simultaneously de-energize said relays for operating the movable element at a higher, normal speed.
Claim 2
Dependent Claim
296 words
An electric mounting for controlling the energizing circuit of a d.c. motor for driving a movable element comprising a coupler for connecting two poles of said energizing circuit to first and second batteries of substantially identical characteristics, said first and second batteries each including a first terminal of one polarity and a second terminal of another polarity, said first terminal of said first battery being connected to said first pole of said energizing circuit and said second terminal of said second battery being connected to said second pole of said energizing circuit, said coupler including first and second relays each having a set of back contacts and a set of front contacts, the back contacts of said first and second relays on one side thereof being connected to each other, the back contact of said first relay on the other side thereof being connected to the first terminal of said second battery, the back contact of said second relay on the other side thereof being connected to the said second terminal of said first battery, the front contact of said first relay on one side thereof being connected to the second terminal of said second battery, the front contact of said first relay on the other side thereof being connected to the second terminal of said first battery, the front contact of said second relay on one side thereof being connected to the first terminal of said first battery, the front contact of said second relay on the other side thereof being connected to the first terminal of said second battery, and means to simultaneously energize said first and second relays for starting said movable mechanical element at low speed, and to simultaneously de-energize said relays for operating the movable element at a higher, normal speed.
Claim 3
Dependent Claim
227 words
An electrical mounting according to claim 1 further comprising an armature and a field winding connected in series to each other, a reversing switch for reversing the direction of rotation of said d.c. motor, said reversing switch including third forward motion and fourth reverse motion relays, each of said third and fourth relays including a set of back contacts and a set of front contacts, the back contacts of said third and fourth relays on one side thereof being connected to one of the terminals of said armature, the back contact of said third relay on the other side thereof being connected to the front contact of said third relay on one side thereof, the back contact of said fourth relay on the other side thereof being connected to the front contact of said fourth relay on one side thereof, the front contact of said third relay on one side thereof also being connected to one side of said field winding and the front contact of said fourth relay on said one side thereof also being connected to the other side of said field winding, the front contact of said third and fourth relays on the other side thereof being connected to said first pole of said energizing circuit, and the second pole of said energizing circuit being connected to the other side of the said armature.
Claim 4
Dependent Claim
71 words
The invention according to claim 2 further comprising safety means including a push-button switch mounted to the front of said movable mechanical element, said safety means being adapted, when said push-button switch is actuated, to control the energization means of said first and second relays, and, if said third relay is pre-energized to further de-energize said third relay and energize said fourth relay thereby reversing the direction of said movable element.
Claim 5
Dependent Claim
110 words
The invention according to claim 2 wherein at least one of said first, second, third and fourth relays includes a coil and a plunger core having one end disposed within said coil and adapted to actuate the set of front contacts thereof, the back contact set of said relay including a first contact stud disposed on the outer end of said plunger coure of said relay and a second contact stud, and an insulating support for the second contact stud of the said back contact provided outside of said coil and in front of said front contact stud for engaging said second contact stud only when said relay is de-energized.
Claim 6
Dependent Claim
113 words
The invention according to claim 4 further comprising a coil return spring for said plunger core, a screw-threaded rod of insulating material connected to said plunger core, a metal washer disposed on the outer end of said rod, a washer of insulating material disposed on said metal washer, a metal clamping nut engaging said screw-threaded rod and constituting the first contact stud of said back contact, wherein one end of a first conductor is inserted between said insulating washer and said nut, a metal bracket and a metal bolt adapted to secure said bracket to said insulating support wherein a second conductor is adapted to be inserted between said bracket and said bolt.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |