Patent US4002314A successfully refreshed from Google Patents.
US4002314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Train vehicle speed control signal providing apparatus
Assignee: Bombardier Transportation Holdings USA Inc
•
Filing: 1975-07-07
•
Granted: 1977-01-11
•
Expires: 1995-07-07
Abstract
Abstract The present invention relates to a train vehicle speed control signal providing apparatus operative with a frequency command speed control signal, and relates to the generation of the desired speed code signals in such a frequency rate system. Two separate and independent physical and electrical operations provide each of the respective desired frequency speed code signals in combination with a comparison step to provide an output speed code signal only if the two input frequency signals are each at the desired frequency.
Inventors
- 👤 Isaac R. Barpal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:55
CPC Classifications
B; B61; B61L; B61L3/00; B61L3/16; B61L3/22; B61L3/24; B61L3/246
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
In a train vehicle control apparatus for determining the operation of a train vehicle along a track including a plurality of signal blocks, the combination of: means for providing a first frequency signal having one predetermined frequency for controlling the operation of said train vehicle, means responsive to said first frequency signal for providing a first output signal, means for providing a second frequency signal having a different predetermined frequency for controlling the operation of said train vehicle, means responsive to said second frequency signal for providing a second output signal, and means for comparing the respective frequencies of said first output signal and said second output signal for providing a control signal for controlling the operation of said train vehicle when the respective frequencies of said first output signal and said second output signal are substantially the same.
Claim 2
Dependent Claim
139 words
In a train vehicle control apparatus for determining the operation of a train vehicle along a track including a plurality of signal blocks, the combination of: means for providing a first frequency signal having one predetermined frequency for controlling the operation of said train vehicle, means responsive to said first frequency signal for providing a first output signal, means for providing a second frequency signal having a different predetermined frequency for controlling the operation of said train vehicle, means responsive to said second frequency signal for providing a second output signal, and means for comparing the respective frequencies of said first output signal and said second output signal for providing a control signal for controlling the operation of said train vehicle when the respective frequencies of said first output signal and said second output signal are substantially the same.
Claim 3
Dependent Claim
29 words
The train vehicle control apparatus of claim 1, including means responsive to said control signal for controlling the operation of said train vehicle in one of said signal blocks.
Claim 4
Dependent Claim
51 words
The train vehicle control apparatus of claim 1, with said first frequency signal having one predetermined frequency in accordance with the desired speed operation for said train vehicle and with said second frequency signal having a different predetermined frequency in accordance with the same desired speed operation for said train vehicle.
Claim 5
Dependent Claim
27 words
The train control apparatus of claim 1, with said control signal having a predetermined frequency in accordance with a desired speed of operation for said train vehicle.
Claim 6
Dependent Claim
38 words
The train vehicle control apparatus of claim 1, including means operative with one of said signal blocks and responsive to said control signal for controlling the speed of operation of said train vehicle in said one signal block.
Claim 7
Dependent Claim
126 words
In speed control signal providing apparatus for determining the speed of operation of a train vehicle along a track including a plurality of signal blocks, the combination of means for providing a first output signal having one predetermined frequency, means for modifying said first output signal to provide at least a first speed control signal having a frequency in accordance with a desired speed of operation for said train vehicle, means for providing a second output signal having a different predetermined frequency, means for modifying said second output signal to provide at least a second speed control signal having a frequency in accordance with said desired speed, and means for comparing said first speed control signal and said second speed control signal in relation to frequency.
Claim 8
Dependent Claim
126 words
In speed control signal providing apparatus for determining the speed of operation of a train vehicle along a track including a plurality of signal blocks, the combination of means for providing a first output signal having one predetermined frequency, means for modifying said first output signal to provide at least a first speed control signal having a frequency in accordance with a desired speed of operation for said train vehicle, means for providing a second output signal having a different predetermined frequency, means for modifying said second output signal to provide at least a second speed control signal having a frequency in accordance with said desired speed, and means for comparing said first speed control signal and said second speed control signal in relation to frequency.
Claim 9
Dependent Claim
32 words
The speed control signal providing apparatus of claim 6, including means operative with said comparing means for controlling the speed of operation of said train vehicle in one of said signal blocks.
Claim 10
Dependent Claim
31 words
The speed control signal providing apparatus of claim 6, with the frequency of said first speed control signal being substantially the same as the frequency of said second speed control signal.
Claim 11
Dependent Claim
41 words
The speed control signal providing apparatus of claim 6, with said means for modifying said first signal output signal including a plurality of frequency dividers, and with said means for modifying said second output signal including a plurality of frequency dividers.
Claim 12
Dependent Claim
27 words
The speed control signal providing apparatus of claim 6, with said comparing means including means operative to control said train vehicle in one of said signal blocks.
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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |