US3970160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for electrically powered transportation means
Assignee: Individual
•
Filing: 1973-11-06
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Granted: 1976-07-20
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Expires: 1993-11-06
Abstract
Abstract A steering control for an electrically powered vehicle having a pair of traction wheels on each side of the vehicle's frame, each of said wheels being driven by a synchronous type motor. The rotor field producing coils of each motor being separately controlled by the accelerator control of the vehicle and a frequency changing circuit which selectively changes the rotational speed of individual motors. The frequency changing circuit includes frequency divider switches and frequency counters connected to the rotor field producing coils; the wipers of said frequency divider switches are connected to the steering control in such manner as the output of each frequency dividing counter is varied independently. A battery included in such vehicle for producing electric power needed for the motors can be charged by a generator or alternator. Current from the battery to each motor is pulsed, and energy charging the battery from the generator or alternator is also pulsed, the latter pulses being interposed in time between the pulses from the battery to the motors. Steering sensitivity may be changed with an increase in speed by linkage between the accelerator and the frequency divider switches, so that as the speed of the vehicle increases, its turning radius is also changed in response to a given arc of turn of the control steering.
Inventors
- 👤 William Nowick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:55
CPC Classifications
B; B60; B60K; B60K1/00; B60K1/02; B60L; B60L15/00; B60L15/20; B60L15/2036; B60L50/00; B60L50/30; B60L50/50; B60L50/51; B62; B62D; B62D11/00; B62D11/02; B62D11/04; B60L2220/00; B60L2220/10; B60L2220/12; B60L2220/14; B60L2220/18; B60L2220/40; B60L2220/44; B60L2240/00; B60L2240/10; B60L2240/12; B60L2240/40; B60L2240/42; B60L2240/421; B60L2250/00; B60L2250/26; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/72
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
167 words
An electrically powered transportation means which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each of said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each determining the current frequency which separately synchronously determines substantially exactly the rotational speed of its corresponding said motors, electrical power producing means for the rotor field of each of said motors, and speed controlling means which performs the functions of separately and directly fixing the frequency of each said drive field producing means whereby said transportation means is propelled at a predetermined speed and steered in response to the separately governed rotational speeds of each of said motors.
Claim 2
Dependent Claim
167 words
An electrically powered transportation means which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each of said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each determining the current frequency which separately synchronously determines substantially exactly the rotational speed of its corresponding said motors, electrical power producing means for the rotor field of each of said motors, and speed controlling means which performs the functions of separately and directly fixing the frequency of each said drive field producing means whereby said transportation means is propelled at a predetermined speed and steered in response to the separately governed rotational speeds of each of said motors.
Claim 3
Dependent Claim
22 words
An electrically powered transportation means in accordance with claim 1, wherein said controlling means comprises an accelerator pedal and a steering wheel.
Claim 4
Dependent Claim
18 words
An electrically powered transportation means in accordance with claim 1, wherein said controlling means comprises externally applied signals.
Claim 5
Dependent Claim
16 words
An electrically powered transportation means in accordance with claim 3, wherein said signals comprise electromagnetic signals.
Claim 6
Dependent Claim
183 words
An electrically powered vehicle which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each separately synchronously governing the rotational speed of each of said motors, electrical power producing means for the rotor field of each of said motors, and controlling means controlling each said drive field producing means whereby said transportation means is propelled and steered in response to the separately governed rotational speeds of each of said motors, each said drive field producing means including at least one switching means, said switching means opening and closing electrical current to said drive field producing means in response to a signal generated by a signal producing means included in said controlling means.
Claim 7
Dependent Claim
183 words
An electrically powered vehicle which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each separately synchronously governing the rotational speed of each of said motors, electrical power producing means for the rotor field of each of said motors, and controlling means controlling each said drive field producing means whereby said transportation means is propelled and steered in response to the separately governed rotational speeds of each of said motors, each said drive field producing means including at least one switching means, said switching means opening and closing electrical current to said drive field producing means in response to a signal generated by a signal producing means included in said controlling means.
Claim 8
Dependent Claim
18 words
An electrically powered transportation means in accordance with claim 5 wherein said switching means comprises a power switch.
Claim 9
Dependent Claim
46 words
An electrically powered transportation means in accordance with claim 5 wherein said controlling means includes a variable frequency generator, accelerator means connected to said variable frequency generator, and a frequency changing circuit, each said signal producing means included as a part of said frequency changing circuit.
Claim 10
Dependent Claim
21 words
An electrically powered transportation means in accordance with claim 7 wherein said variable frequency generator comprises a variable frequency pulse generator.
Claim 11
Dependent Claim
58 words
An electrically powered transportation means in accordance with claim 7 wherein each said signal producing means includes a frequency changing means, said frequency changing means each receiving signals from said variable frequency generator, frequency changing switch means cooperating with said frequency changing means whereby the frequency output of each of said frequency changing means may be independently varied.
Claim 12
Dependent Claim
22 words
An electrically powered transportation means in accordance with claim 9 wherein each said frequency changing means is a programmable frequency dividing counter.
Claim 13
Dependent Claim
44 words
An electrically powered transportation means in accordance with claim 5 wherein further switching means is provided for each of said drive field producing means, said further switching means adapted selectively to reverse the rotation of its respective motor in response to said controlling means.
Claim 14
Dependent Claim
204 words
An electrically powered transportation means which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each separately synchronously governing the rotational speed of each of said motors, electrical power producing means for the rotor field of each of said motors, and controlling means controlling each said drive field producing means whereby said transportation means is propelled and steered in response to the separately governed rotational speeds of each of said motors, the transportation means further including electrical power means wherein said electrical power producing means comprises an electrical energy source and a battery, a circuit between said batteryy and each of said motors including pulse producing means providing said drive fields of said motors, and means for charging said battery by said energy source whereby said battery is charged between said pulses.
Claim 15
Dependent Claim
204 words
An electrically powered transportation means which comprises frame means, a pair of propelling rotatable means on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each said motors being connected to each of said rotatable means for turning said rotatable means at a rotational speed having a controlled predetermined relationship to the corresponding connected motor's rotational speed, each said motor including a torque producing drive field and a rotor field, a pair of electrical drive field producing means each separately synchronously governing the rotational speed of each of said motors, electrical power producing means for the rotor field of each of said motors, and controlling means controlling each said drive field producing means whereby said transportation means is propelled and steered in response to the separately governed rotational speeds of each of said motors, the transportation means further including electrical power means wherein said electrical power producing means comprises an electrical energy source and a battery, a circuit between said batteryy and each of said motors including pulse producing means providing said drive fields of said motors, and means for charging said battery by said energy source whereby said battery is charged between said pulses.
Claim 16
Dependent Claim
76 words
A control system for a pair of synchronous motors, said system comprising a single control for changing the motor drive frequency of said pair of motors and a further single control for creating a motor drive differential thereby performing the function of causing a selected rotational speed differential between said motors with the rotational speed of one said motor being increased and the rotational speed of the other said motor being decreased by substantially equal amounts.
Claim 17
Dependent Claim
76 words
A control system for a pair of synchronous motors, said system comprising a single control for changing the motor drive frequency of said pair of motors and a further single control for creating a motor drive differential thereby performing the function of causing a selected rotational speed differential between said motors with the rotational speed of one said motor being increased and the rotational speed of the other said motor being decreased by substantially equal amounts.
Claim 18
Dependent Claim
182 words
An electrically powered transportation means which comprises a frame means, a pair of propelling rotatable means located on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each of said motors being connected to each of said rotatable means for turning its corresponding said rotatable means at a rotational speed having a controlled predetermined relationship to the rotational speed of its corresponding said motor, each said motor including a torque producing drive means and rotor field, a pair of electrical drive field producing means each determining the current frequency which separately synchronously determines substantially exactly the rotational speed of its corresponding said motors, electrical power producing means for the rotor field of each of said motors, and controlling means for controlling the direction of rotation of each of said rotatable means whereby said transportation means can be turned with one rotatable means rotated at a fixed rotational speed in one direction and the other rotatable means rotated at the same fixed rotational speed in the other direction, about a predetermined stationary vertical axis.
Claim 19
Dependent Claim
182 words
An electrically powered transportation means which comprises a frame means, a pair of propelling rotatable means located on each side of said frame means, a pair of synchronous motors mounted on said frame means, one of each of said motors being connected to each of said rotatable means for turning its corresponding said rotatable means at a rotational speed having a controlled predetermined relationship to the rotational speed of its corresponding said motor, each said motor including a torque producing drive means and rotor field, a pair of electrical drive field producing means each determining the current frequency which separately synchronously determines substantially exactly the rotational speed of its corresponding said motors, electrical power producing means for the rotor field of each of said motors, and controlling means for controlling the direction of rotation of each of said rotatable means whereby said transportation means can be turned with one rotatable means rotated at a fixed rotational speed in one direction and the other rotatable means rotated at the same fixed rotational speed in the other direction, about a predetermined stationary vertical axis.
References Cited (Backward Citations)
US2565293A
Cited
US3584276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |