US3719399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skid control module
Assignee: Individual
•
Filing: 1970-10-26
•
Granted: 1973-03-06
•
Expires: 1990-10-26
Abstract
Abstract An skid control control module which generates accurate signals indicating the instantaneous velocity of a moving member from successive input signals with no appreciable time delay. Each instantaneous velocity signal of the member is compared with a signal developed according to a maximum permissible acceleration rate. Whenever the comparison indicates the member exceeded the permissible rate, a control signal is generated which is only terminated when a later comparison indicates the motion of the member is back within the permitted range. This control signal controls the braking force so as to prevent an impending skid.
Inventors
- 👤 C Adahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:23
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/176; B60T8/1761; B60T8/17613
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
370 words
In a skid control system for controlling the application of braking forces or the like to a wheel of a moving vehicle; the combination of means responsive to the velocity of the wheel and operative to develop input signals having time spacing corresponding to the velocity of the rotating wheel; input switching means operative in response to the input signals to develop enabling signals having a corresponding time spacing; output signal generator means operative to develop control signals at the output thereof for controlling the braking force, the output signal generator means being rendered operative in response to the enabling signal and inoperative in response to a disable signal; a voltage source; a source of relatively constant current; velocity computer means including a velocity computer capacitor coupled to and arranged to be charged by the constant current source at a rate and to a voltage level corresponding to a maximum permissible negative or positive acceleration; velocity measuring means including a velocity measuring capacitor arranged to be charged by the voltage source to a voltage level corresponding to the instantaneous velocity of the wheel and discharge switch means operative when energized to discharge the velocity measuring capacitor to a predetermined voltage level; reset gate means controlling the charge and discharge of the velocity computer capacitor, the reset gate means being operative when energized to discharge the velocity computing capacitor, and thereby, develop the disable signal for rendering the output generator means inoperative; equalizer means operative in response to each enabling signal from the input switching means to compare the voltage levels of the velocity computer capacitor and the velocity measuring capacitor and also being operative when the velocity computer capacitor voltage level is greater than the velocity measuring capacitor voltagE level to energize the reset gate means so as to reduce the voltage level of the velocity computer capacitor to the level of the velocity measuring capacitor thereby developing the disable signal and when the velocity computer capacitor voltage level is less than the voltage level of the velocity measuring capacitor to maintain the reset gate means deenergized; and reset delay means operative in response to each of the enabling signals to energize the discharge switch means a predetermined interval thereafter.
Claim 2
Dependent Claim
370 words
In a skid control system for controlling the application of braking forces or the like to a wheel of a moving vehicle; the combination of means responsive to the velocity of the wheel and operative to develop input signals having time spacing corresponding to the velocity of the rotating wheel; input switching means operative in response to the input signals to develop enabling signals having a corresponding time spacing; output signal generator means operative to develop control signals at the output thereof for controlling the braking force, the output signal generator means being rendered operative in response to the enabling signal and inoperative in response to a disable signal; a voltage source; a source of relatively constant current; velocity computer means including a velocity computer capacitor coupled to and arranged to be charged by the constant current source at a rate and to a voltage level corresponding to a maximum permissible negative or positive acceleration; velocity measuring means including a velocity measuring capacitor arranged to be charged by the voltage source to a voltage level corresponding to the instantaneous velocity of the wheel and discharge switch means operative when energized to discharge the velocity measuring capacitor to a predetermined voltage level; reset gate means controlling the charge and discharge of the velocity computer capacitor, the reset gate means being operative when energized to discharge the velocity computing capacitor, and thereby, develop the disable signal for rendering the output generator means inoperative; equalizer means operative in response to each enabling signal from the input switching means to compare the voltage levels of the velocity computer capacitor and the velocity measuring capacitor and also being operative when the velocity computer capacitor voltage level is greater than the velocity measuring capacitor voltagE level to energize the reset gate means so as to reduce the voltage level of the velocity computer capacitor to the level of the velocity measuring capacitor thereby developing the disable signal and when the velocity computer capacitor voltage level is less than the voltage level of the velocity measuring capacitor to maintain the reset gate means deenergized; and reset delay means operative in response to each of the enabling signals to energize the discharge switch means a predetermined interval thereafter.
Claim 3
Dependent Claim
370 words
In a skid control system for controlling the application of braking forces or the like to a wheel of a moving vehicle; the combination of means responsive to the velocity of the wheel and operative to develop input signals having time spacing corresponding to the velocity of the rotating wheel; input switching means operative in response to the input signals to develop enabling signals having a corresponding time spacing; output signal generator means operative to develop control signals at the output thereof for controlling the braking force, the output signal generator means being rendered operative in response to the enabling signal and inoperative in response to a disable signal; a voltage source; a source of relatively constant current; velocity computer means including a velocity computer capacitor coupled to and arranged to be charged by the constant current source at a rate and to a voltage level corresponding to a maximum permissible negative or positive acceleration; velocity measuring means including a velocity measuring capacitor arranged to be charged by the voltage source to a voltage level corresponding to the instantaneous velocity of the wheel and discharge switch means operative when energized to discharge the velocity measuring capacitor to a predetermined voltage level; reset gate means controlling the charge and discharge of the velocity computer capacitor, the reset gate means being operative when energized to discharge the velocity computing capacitor, and thereby, develop the disable signal for rendering the output generator means inoperative; equalizer means operative in response to each enabling signal from the input switching means to compare the voltage levels of the velocity computer capacitor and the velocity measuring capacitor and also being operative when the velocity computer capacitor voltage level is greater than the velocity measuring capacitor voltagE level to energize the reset gate means so as to reduce the voltage level of the velocity computer capacitor to the level of the velocity measuring capacitor thereby developing the disable signal and when the velocity computer capacitor voltage level is less than the voltage level of the velocity measuring capacitor to maintain the reset gate means deenergized; and reset delay means operative in response to each of the enabling signals to energize the discharge switch means a predetermined interval thereafter.
Claim 4
Dependent Claim
370 words
In a skid control system for controlling the application of braking forces or the like to a wheel of a moving vehicle; the combination of means responsive to the velocity of the wheel and operative to develop input signals having time spacing corresponding to the velocity of the rotating wheel; input switching means operative in response to the input signals to develop enabling signals having a corresponding time spacing; output signal generator means operative to develop control signals at the output thereof for controlling the braking force, the output signal generator means being rendered operative in response to the enabling signal and inoperative in response to a disable signal; a voltage source; a source of relatively constant current; velocity computer means including a velocity computer capacitor coupled to and arranged to be charged by the constant current source at a rate and to a voltage level corresponding to a maximum permissible negative or positive acceleration; velocity measuring means including a velocity measuring capacitor arranged to be charged by the voltage source to a voltage level corresponding to the instantaneous velocity of the wheel and discharge switch means operative when energized to discharge the velocity measuring capacitor to a predetermined voltage level; reset gate means controlling the charge and discharge of the velocity computer capacitor, the reset gate means being operative when energized to discharge the velocity computing capacitor, and thereby, develop the disable signal for rendering the output generator means inoperative; equalizer means operative in response to each enabling signal from the input switching means to compare the voltage levels of the velocity computer capacitor and the velocity measuring capacitor and also being operative when the velocity computer capacitor voltage level is greater than the velocity measuring capacitor voltagE level to energize the reset gate means so as to reduce the voltage level of the velocity computer capacitor to the level of the velocity measuring capacitor thereby developing the disable signal and when the velocity computer capacitor voltage level is less than the voltage level of the velocity measuring capacitor to maintain the reset gate means deenergized; and reset delay means operative in response to each of the enabling signals to energize the discharge switch means a predetermined interval thereafter.
Claim 5
Dependent Claim
113 words
A skid control system as described in claim 1 further including delay disable means shunting the disable signal so that the output signal generator means remains operative until acceleration or deceleration ceases, the delay disable means including switching means operative to shunt the disable signal from the output signal generator means; comparison means controlling the switching means in response both to the level of control signals from the output signal generator and the level of the velocity measuring capacitor, the comparison means being operative when the level of the control signals sensed for a predetermined time interval are greater than the level of the velocity measuring capacitor to render the switching means operative.
Claim 6
Dependent Claim
122 words
A skid control system as described in claim 2 wherein the switching means is a switching transistor of one conductivity type and having an emitter electrode coupled to the voltage source, a collector electrode coupled to the output of the reset gate means, and a control electrode and the comparison means includes a R C network for determining the predetermined time interval and coupled to the output of the output signal generator means and a transistor of a conductivity type opposite that of the switching transistor and having an emitter electrode coupled to the R C net work, a collector electrode coupled to the switching transistor control electrode and a control electrode responsive to the voltage level of the velocity measuring capacitor.
Claim 7
Dependent Claim
60 words
A skid control system as described in claim 1, wherein the equalizer means includes a semi-conductor device having an emitter electrode coupled to the velocity measuring capacitor, a collector electrode coupled to the reset gate means and a control electrode coupled to the input switching means, and a trigger capacitor interposed between the control electrode and the input switching means.
Claim 8
Dependent Claim
39 words
A skid control system as described in claim 4 wherein the reset delay means is a Zener diode having the anode thereof connected to the semi-conductor device control electrode and the cathode thereof connected to the input switching means.
Claim 9
Dependent Claim
188 words
A skid control system as described in claim 4 wherein reset gate means is a reset transistor having an emitter coupled to the velocity computer capacitor, a collector coupled to the input of the output signal generator means and a control electrode coupled to the equalizer means and the output signal generator means includes input and output transistors of opposite conductivity types, the input transistor including an emitter electrode coupled to one side of the voltage source and a collector electrode coupled to the output of the output signal generator means and a control electrode coupled to the output of the input switching means, the output transistor having a collector electrode coupled to the control electrode of the input transistor, an emitter electrode coupled to the other side of the voltage source and a control electrode coupled both to the reset gate means and the output of the output signal generator, and R C network connected between the reset gate means and the control electrode of the input transistor and another R C network connected between the input switching means and the control electrode of the input transistor.
Claim 10
Dependent Claim
48 words
A skid control system as described in claim 1 wherein the reset gate means is a reset transistor having an emitter coupled to the velocity memory capacitor, a collector coupled to the input of the output Signal generator means and a control electrode coupled to the equalizer means.
Claim 11
Dependent Claim
62 words
A skid control system as described in claim 1 wherein the constant current source comprises a voltage divider network connected across the voltage source and a transistor having a control electrode coupled to the voltage divider network , an emitter electrode coupled to the voltage source and a collector electrode, the emitter and collector electrodes being coupled across the velocity computer capacitor.
Claim 12
Dependent Claim
149 words
A skid control system as described in claim 1 wherein the output signal generator means includes input and output transistors of opposite conductivity types, the input transistor including an emitter electrode coupled to one side of the voltage source, a collector electrode coupled to the output of the output signal generator means and a control electrode coupled to the output of the input switching means, the output transistor having a collector electrode coupled to the control electrode of the input transistor, an emitter electrode coupled to the other side of the voltage source and a control electrode coupled both to the reset gate means and the output of the output signal generator, an R C network connected between the reset gate means and the control electrode of the output transistor and another R C network connected between the input switching means and the control electrode of the input transistor.
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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) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |