Patent US3839643A successfully refreshed from Google Patents.
US3839643A
Expired / Lapsed
US
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Monitoring and protecting device for an antiskid functional circuit assembly
Assignee: DBA SA
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Filing: 1973-06-13
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Granted: 1974-10-01
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Expires: 1993-06-13
Abstract
Abstract A monitoring and protecting device for an antiskid functional circuit assembly responsive to the variations in one or more electrical input signals and supplying at least one output signal in response to given values of the variations, the device comprising filter means, a summation means, a threshold means, and at least one blocking element, arranged in that order. Each filter means being supplied by one input signal and passing given fraction of this signal. The summation means supply the threshold means with the sum of this fractions, for blocking transmission to the assembly of at least one input signal when the sum is greater than or equal to a given threshold.
Inventors
- 👤 J Lefevre
- 👤 B Vermillet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:15
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/32; B60T8/88; B60T8/885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
In an antiskid system for a wheeled vehicle including logic means responsive to a plurality of input signals for generating an output signal when an incipient skidding condition of a vehicle wheel exists, a monitoring and protecting device comprising: filter means responsive to each of said input signals for separating an interference signal from each of said input signals; summation means connected to said filter means for generating a summation signal proportional to the sum of the values of said interference signals; threshold means connecteD to said summation means for comparing said summation signal with a reference signal having a predetermined value and generating a threshold signal when the summation signal exceeds the reference signal; and blocking means having inputs for each of said input signals, and an output connected to said logic means corresponding to each of said inputs, said blocking means including means connected to said threshold means and responsive to said threshold signal for blocking at least one of said input signals between said input and output upon generation of said threshold signal.
Claim 2
Dependent Claim
176 words
In an antiskid system for a wheeled vehicle including logic means responsive to a plurality of input signals for generating an output signal when an incipient skidding condition of a vehicle wheel exists, a monitoring and protecting device comprising: filter means responsive to each of said input signals for separating an interference signal from each of said input signals; summation means connected to said filter means for generating a summation signal proportional to the sum of the values of said interference signals; threshold means connecteD to said summation means for comparing said summation signal with a reference signal having a predetermined value and generating a threshold signal when the summation signal exceeds the reference signal; and blocking means having inputs for each of said input signals, and an output connected to said logic means corresponding to each of said inputs, said blocking means including means connected to said threshold means and responsive to said threshold signal for blocking at least one of said input signals between said input and output upon generation of said threshold signal.
Claim 3
Dependent Claim
41 words
The invention of claim 1: power supply means for operating said logic means; one of said input signals representing the voltage level of the power supply, each of the other signals representing the rotational velocity of at least one vehicle wheel.
Claim 4
Dependent Claim
25 words
The invention of claim 2: said signal to be blocked being one of the signals representing the rotational velocity of at least one vehicle wheel.
Claim 5
Dependent Claim
82 words
The invention of claim 2: said summation means comprising at least one transistor biased between said power supply means and grounded by resistance means, a capacitor connected between the base of said transistor and ground, the emitter of said transistor being connected to the input receiving an input signal representing the rotational velocity of at least one vehicle wheel, the collector of said transistor being connected to the input receiving the input signal representing the voltage level of the power supply means.
Claim 6
Dependent Claim
36 words
The invention of claim 1; and an attenuator connected to the inputs of the blocking means receiving the signals to be blocked and an unidirectional transmission element connected to the outputs corresponding to the last-mentioned inputs.
Claim 7
Dependent Claim
54 words
The invention of claim 5: said threshold means and the blocking means comprising at least one transistor, the base of said transistor receiving said summation signal, the emitter of said transistor being connected to ground, and the collector of said transistor being connected between said inputs and outputs carrying the signals to be blocked.
Claim 8
Dependent Claim
35 words
The invention of claim 6: said unidirectional element being a diode connected between the output carrying the signals to be blocked and said logic means to prevent the latter from discharging through said one transistor.
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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |