Patent US3748641A successfully refreshed from Google Patents.
US3748641A
Expired / Lapsed
US
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Speed limiter and alarm for internal combustion engine
Assignee: Individual
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Filing: 1971-09-17
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Granted: 1973-07-24
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Expires: 1991-09-17
Abstract
Abstract Speed limiter and alarms for internal combustion engines, especially automobiles. Signals from the ignition system trigger the limiter or alarm devices. Shift registers and digital counters shift with or count pulses spaced apart in accordance with automobile speed. Reaching a certain stage or count prior to a timed reset pulse results in a generation of a signal useful to set an alarm or inhibit the speed. Cyclic operation of the system maintains a constant watch on the speed. A flip flop set by coincidence of the shift stage or count and a reset pulse energizes the signal, and absence of the shift stage or count at the time of a reset pulse, unsets the flip flop, deactivating the signal. The signal can energize or de-energize electronic or conventional warning, ignition or fuel pump devices.
Inventors
- 👤 D Hartung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:57
CPC Classifications
B; B60; B60K; B60K31/00; B60K31/02; B60K31/18; F; F02; F02P; F02P9/00; F02P9/002; F02P9/005; G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; G01P1/10; G01P1/106; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/4802; G01P3/4807
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
128 words
A system for internal combustion engines to cause alarm at one speed and to prevent the exceeding of a second speed said system including means for utilizing the count of ignition pulses within a preset time, with a first preset count causing an alarm and a second preset count inhibiting the engine speed, the system having an ignition pulse counter comprising a shift register, with the shifts being caused by signals from the ignition points or their electronic equivalent opening or closing and with the shift register being reset by a timer pulse, and means to provide an alarm signal if the shift register shifts to one point, and to provide an inhibit signal if the shift register shifts to a second point within a preset time period.
Claim 2
Independent Claim
128 words
A system for internal combustion engines to cause alarm at one speed and to prevent the exceeding of a second speed said system including means for utilizing the count of ignition pulses within a preset time, with a first preset count causing an alarm and a second preset count inhibiting the engine speed, the system having an ignition pulse counter comprising a shift register, with the shifts being caused by signals from the ignition points or their electronic equivalent opening or closing and with the shift register being reset by a timer pulse, and means to provide an alarm signal if the shift register shifts to one point, and to provide an inhibit signal if the shift register shifts to a second point within a preset time period.
Claim 3
Independent Claim
114 words
A system for internal combustion engines to cause alarm at one speed and to prevent the exceeding of a second speed said system including means for utilizing the count of ignition pulses within a preset time, with a first preset count causing an alarm and a second preset count inhibiting the engine speed, the system having an ignition counter comprising a conventional digital counter, with counts being activated by signals from the ignition points or their electronic equivalent opening or closing, and a logical decoder of a predetermined count within a preset time period adapted to generate the alarm signal and a second decoder with a higher count adapted to generate the inhibit signal.
Claim 4
Independent Claim
114 words
A system for internal combustion engines to cause alarm at one speed and to prevent the exceeding of a second speed said system including means for utilizing the count of ignition pulses within a preset time, with a first preset count causing an alarm and a second preset count inhibiting the engine speed, the system having an ignition counter comprising a conventional digital counter, with counts being activated by signals from the ignition points or their electronic equivalent opening or closing, and a logical decoder of a predetermined count within a preset time period adapted to generate the alarm signal and a second decoder with a higher count adapted to generate the inhibit signal.
Claim 5
Independent Claim
91 words
A system for automobiles to generate a signal of a preselected speed, said system including a digital shift register, a timer for generating time signals, means for supplying a series of speed pulses to said shift register in the manner to cause each to shift said shift register, the time between said speed pulses representing automobile speed, and means to provide said signal of a preselected speed if the shift register shifts to a preselected point along said shift register prior to occurrence of a time signal generated by said timer.
Claim 6
Independent Claim
91 words
A system for automobiles to generate a signal of a preselected speed, said system including a digital shift register, a timer for generating time signals, means for supplying a series of speed pulses to said shift register in the manner to cause each to shift said shift register, the time between said speed pulses representing automobile speed, and means to provide said signal of a preselected speed if the shift register shifts to a preselected point along said shift register prior to occurrence of a time signal generated by said timer.
Claim 7
Dependent Claim
70 words
A system as described in claim 3 including a signal flip-flop, and connections whereby coincidence of a pulse from said preselected point and the time signal from the timer causes said flip-flop to be set, causing said signal of a preselected speed to be generated, and absence of a pulse from said point and the time signal from the timer causes said flip-flop to be reset, turning off said signal.
Claim 8
Dependent Claim
46 words
The system of claim 3 wherein there are at least two preselected points along said shift register representing different automobile speeds, and means to generate a different signal for each of said points, when the shift reaches the respective point prior to the next time signal.
Claim 9
Dependent Claim
38 words
The system of claim 5 wherein the first of said signals is adapted to set off an alarM and the second of said signals, representing a faster automobile speed, is adapted to inhibit the operation of said automobile.
Claim 10
Dependent Claim
27 words
The system of claim 3 wherein said means to produce said speed pulses comprises a connection for electrical pulses from the timed ignition system of said automobile.
Claim 11
Independent Claim
84 words
A system for automobiles to generate a signal of a preselected speed, said system including a digital counter, a timer for generating periodic time signals, means for supplying a series of speed pulses to said shift register in the manner to cause each to increase incrementally the count in said counter, the time between said speed pulses representing automobile speed and means to provide said signal of a preselected speed if the counter reaches a preselected count within the period of said time signals.
Claim 12
Independent Claim
84 words
A system for automobiles to generate a signal of a preselected speed, said system including a digital counter, a timer for generating periodic time signals, means for supplying a series of speed pulses to said shift register in the manner to cause each to increase incrementally the count in said counter, the time between said speed pulses representing automobile speed and means to provide said signal of a preselected speed if the counter reaches a preselected count within the period of said time signals.
Claim 13
Dependent Claim
66 words
A system as described in claim 8 including a signal flip flop and connections whereby coincidence of a logically decoded count and the time signal from the timer causes the flip-flop to be set, causing said signal to be generated, and where the lack of a logically decoded count and the time signal from the timer causes said flip-flop to be reset, turning off said signal.
Claim 14
Dependent Claim
43 words
The system of claim 9 wherein there are at least two preselected counts representing different automobile speeds, and means to generate a different signal for each of said counts, when the counter reaches the respective count prior to the next periodic time signal.
Claim 15
Dependent Claim
38 words
The system of claim 10 wherein the first of said signals is adapted to set off an alarm and the second of said signals, representing a faster automobile speed, is adapted to inhibit the operation of said automobile.
Claim 16
Dependent Claim
27 words
The system of claim 8 wherein said means to produce said speed pulses comprises a connection for electrical pulses from the timed ignition system of said automobile.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |