Patent US2282557A successfully refreshed from Google Patents.
US3570622A
Expired / Lapsed
US
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Speed control for motor vehicles
Assignee: RCA Corp
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Filing: 1968-12-27
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Granted: 1971-03-16
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Expires: 1988-12-27
Abstract
Abstract A speed control apparatus for an automotive vehicle is disclosed. While the speed control includes mechanical actuated means to operate the throttle, electronic elements are provided to sense the speed of the vehicle and to store the voltage corresponding to the speed by means of a counting device. Means are also provided to cause the mechanically actuated means to adjust the position of the throttle to keep the speed of the vehicle at the desired value, and to deactivate the speed control apparatus upon depressing the brake pedal, and to reactivate the speed control apparatus when desired, and also to increase or decrease the desired speed.
Inventors
- 👤 Daniel A Wisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:59
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/0205; B; B60; B60K; B60K31/00; B60K31/06; B60K31/10; B60K31/102; B60K31/105; B60K31/107; F02D31/00; F02D31/001; F02D31/002; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/023; F02D2700/0241
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
An electronic speed control for automotive vehicles comprising: means to produce pulses; means to count said pulses, said means counting down from a maximum number; means to produce a voltage which is a measure of the number of pulses counted; means to produce a voltage which is a measure of the road speed of the vehicle; means for stopping the counting of said pulses when said voltages are equal; and means for operating the throttle of said vehicle in a manner to keep said voltages equal.
Claim 2
Dependent Claim
86 words
An electronic speed control for automotive vehicles comprising: means to produce pulses; means to count said pulses, said means counting down from a maximum number; means to produce a voltage which is a measure of the number of pulses counted; means to produce a voltage which is a measure of the road speed of the vehicle; means for stopping the counting of said pulses when said voltages are equal; and means for operating the throttle of said vehicle in a manner to keep said voltages equal.
Claim 3
Dependent Claim
132 words
An electronic speed control for automotive vehicles, comprising: means to produce pulses; means to produce pulses; means to produce a first voltage which is a measure of the number of pulses counted; means to produce a second voltage which is a measure of the road speed of the vehicle, said second voltage having ripple, said ripple normally increasing in frequency and decreasing in amplitude as the speed of the vehicle increases; means for keeping the amplitude of said ripple constant although the speed of said vehicle varies; means for stopping the counting of said pulses when the average value of said second voltage is equal to the value of said first voltage; and means for operating the throttle of said vehicle in a manner to keep said first and second voltages equal.
Claim 4
Dependent Claim
132 words
An electronic speed control for automotive vehicles, comprising: means to produce pulses; means to produce pulses; means to produce a first voltage which is a measure of the number of pulses counted; means to produce a second voltage which is a measure of the road speed of the vehicle, said second voltage having ripple, said ripple normally increasing in frequency and decreasing in amplitude as the speed of the vehicle increases; means for keeping the amplitude of said ripple constant although the speed of said vehicle varies; means for stopping the counting of said pulses when the average value of said second voltage is equal to the value of said first voltage; and means for operating the throttle of said vehicle in a manner to keep said first and second voltages equal.
Claim 5
Dependent Claim
30 words
The invention as expressed in claim 2, in which means are provided to inactivate said means for keeping the amplitude of said ripple constant when said pulses are being counted.
Claim 6
Dependent Claim
44 words
The invention as expressed in claim 3 in which means are provided to subtract a voltage substantially equal to one half of said ripple voltage from said voltage which is produced when said means for keeping the amplitude of said ripple constant in inactivated.
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |