US3769595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and circuit arrangement for the discrimination of mutual revolutional speeds of a plurality of revolving members
Assignee: Aisin Corp
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Filing: 1971-12-01
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Granted: 1973-10-30
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Expires: 1991-12-01
Abstract
Abstract The invention relates to a rotational speed descriminator determining occasional speed differences among several rotating members, such as automotive front and rear wheels. The main feature resides in the detection of two or more speedresponsive pulse signals of a first signal series as measured between two successive pulse signals belonging to a second series of speed responsive pulse signals.
Inventors
- 👤 J Ooya
- 👤 K Takayama
- 👤 K Kuwana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/172; G; G01; G01P; G01P3/00; G01P3/42; G01P3/56; G01P3/60
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A method for the discrimination of the relative rotational variable speeds of a plurality of rotating members, comprising in combination the following steps: generating a first signal series of pulses having a frequency responsive to the actual speed of one of said rotating members; generating a second signal series of pulses having a frequency responsive to the actual speed of the other one of said rotating members; sensing the existence of two or more pulses of one of said signal series between two successive pulses of the other signal series, for determining the relative rotational speeds of said members; conveying automatically the signal pulse series relating to the higher speed rotating member to a first terminal for high speed output use; and conveying automatically the signal pulse series relating to the lower speed rotating member to a second terminal for low speed output use.
Claim 2
Independent Claim
144 words
A method for the discrimination of the relative rotational variable speeds of a plurality of rotating members, comprising in combination the following steps: generating a first signal series of pulses having a frequency responsive to the actual speed of one of said rotating members; generating a second signal series of pulses having a frequency responsive to the actual speed of the other one of said rotating members; sensing the existence of two or more pulses of one of said signal series between two successive pulses of the other signal series, for determining the relative rotational speeds of said members; conveying automatically the signal pulse series relating to the higher speed rotating member to a first terminal for high speed output use; and conveying automatically the signal pulse series relating to the lower speed rotating member to a second terminal for low speed output use.
Claim 3
Independent Claim
260 words
A system for the discrimination of the relative rotational variable speeds of a plurality of rotating members, comprising in combination: first means for generating a first signal series of pulses having a frequency responsive to the actual speed of one of said rotating members; second means for generating a second signal series of pulses having a frequency responsive to the actual speed of the other one of said rotating members; gate means having at least first, second and third inputs and first and second outputs, said first input being connected with either of said outputs, said third input being connected with the remaining one of said outputs; first connection means for connecting said first means to said first input of said gate means; second connection means for connecting said second means with said third input of said gate means; control means connected with said first and third outputs of said gate means for generating a change-over signal when there are two or more pulses appearing at said second output of said gate means between two successive pulses appearing at said first output of said gate means; and said second input of said gate means receiving said changeover signal for selective connection of said first input with either of said first or second outputs and of said third input with either remaining one of said first or second outputs, whereby said first output automatically delivers a high frequency pulse series upon comparison between said first and second means, and said second output automatically delivers the remaining or low frequency pulse series.
Claim 4
Independent Claim
260 words
A system for the discrimination of the relative rotational variable speeds of a plurality of rotating members, comprising in combination: first means for generating a first signal series of pulses having a frequency responsive to the actual speed of one of said rotating members; second means for generating a second signal series of pulses having a frequency responsive to the actual speed of the other one of said rotating members; gate means having at least first, second and third inputs and first and second outputs, said first input being connected with either of said outputs, said third input being connected with the remaining one of said outputs; first connection means for connecting said first means to said first input of said gate means; second connection means for connecting said second means with said third input of said gate means; control means connected with said first and third outputs of said gate means for generating a change-over signal when there are two or more pulses appearing at said second output of said gate means between two successive pulses appearing at said first output of said gate means; and said second input of said gate means receiving said changeover signal for selective connection of said first input with either of said first or second outputs and of said third input with either remaining one of said first or second outputs, whereby said first output automatically delivers a high frequency pulse series upon comparison between said first and second means, and said second output automatically delivers the remaining or low frequency pulse series.
Claim 5
Dependent Claim
121 words
The system of claim 2 wherein said control means comprises: first flip-flop means connected to said second output, said flip-flop means having at least two output terminals; second flip-flop means connected with either one of said output terminals of said first flip-flop means; third flip-flop means connected with said first output of said gate means for generating a reset signal for said first and second flip-flop means; logic means connected with the other of said output terminals of said first flip-flop means and with the output terminal of said second flip-flop means, for generating a reset signal for said third flip-flop means; and fourth flip-flop means connected with said output terminal of said second flip-flop means for generating said change-over signal.
Claim 6
Dependent Claim
53 words
The system of claim 2 wherein each of said first and second means comprises: a sensor for sensing the rotational speed of one of said rotating members and for generating a series of pulse signals responsive thereto, and a shaper circuit connected with said sensor and for shaping said generated pulse signal series.
Claim 7
Dependent Claim
56 words
The system of claim 4 further comprising first and second differentiating circuits for differentiating the respective outputs of the shaper circuits, the output of said first differentiating circuit being connected to said first input of said gate means, and the output of said second differentiating circuit being connected to said third input of said gate means.
Claim 8
Dependent Claim
75 words
The system of claim 5 wherein said control means comprises: first flip-flop means connected with said second output of said gate means; second flip-flop means connected with the output of said first flip-flop means; logic means connected with the first output of said gate means for generating a reset signal for said first and second flip-flop means; and third flip-flop means connected with the output of said second flip-flop means for generating said change-over signal.
Claim 9
Dependent Claim
150 words
The system of claim 2 wherein said gate means comprises: first and second twin-input gates, one of the inputs of each of these gates receiving output pulses from said first means, the other input of each of said gates receiving said change-over signal from said control means; third and fourth twin-input gates, one of the other of each of these gates receiving output pulses from said second means, the input of of each of these gates receiving said change-over signal from said control means; a fifth twin-input gate having its inputs connected with the respective outputs of said second and third gates, said fifth gate having said first output for the delivery of high frequency signal pulse series; and sixth twin-input gate having its inputs connected with respective outputs of said first and fourth gates, said sixth gate having said second output for delivering said low frequency signal pulse series.
Claim 10
Dependent Claim
101 words
The system of claim 2 further comprising: a first counter circuit connected with said first output of said gate means for counting the revolutions of the higher speed rotating member; a second counter circuit connected with said first counter and said second output of said gate means for counting the revolutions of the lower speed rotating member during the counting period of said first counter; a comparator circuit for comparing the counts in both counters; and a control circuit for controlling the rotational speeds of both said rotating members in response to the results of the comparison by said comparator circuit.
Claim 11
Dependent Claim
94 words
The system of claim 2 further comprising: a hydraulic braking circuit correlated with said first rotating member for controlling the rotational speed of the latter; a pressure control valve means inserted in said braking circuit for reducing the output pressure-rising ratio relative to the input pressure-rising ratio upon arrival of the hydraulic circuit pressure at a predetermined level; servo means connected with said pressure control valve means so as to make said predetermined level variable; and a change-over valve for actuating said servo means in response to said change-over signal from said control means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |