US5136516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog and digital speed display device
Assignee: SASIB SpA Bologna
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Filing: 1989-12-28
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Granted: 1992-08-04
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Expires: 2009-12-28
Abstract
Abstract An analog and digital display device for use with railroad vehicles which comprises: a host processor which transmits operational data received from a digital overspeed controller (DOC), such as actual speed, allowable speed, profile speed, distance to profile, messages and an indication of overspeed; a central processing unit (CPU) which receives and interprets operational data transmitted by the host processor; and an analog and digital display which displays the operational data in both analog and digital formats.
Inventors
- 👤 Jeffrey G. Twombly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
G; G01; G01P; G01P1/00; G01P1/07; G01P1/08; B; B60; B60K; B60K35/00; B60K35/20; B60K35/21; B60K35/22; B61; B61C; B61C17/00; B61C17/04; G01D; G01D7/00; G01D7/002; B60K35/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
107 words
An analog and digital speed display device for use with railroad vehicles comprising: means for receiving externally generated operational data and transmitting said data within said analog and digital speed display device; means for processing said data from said receiving means; and means for displaying the processed data which comprises: a means for providing an analog and/or digital display of the actual speed of said vehicle; a means for providing an analog and/or digital display of the profile speed of said vehicle when a profile speed curve is in effect; and a means for providing an analog and/or digital display of the allowable speed of said vehicle.
Claim 2
Dependent Claim
107 words
An analog and digital speed display device for use with railroad vehicles comprising: means for receiving externally generated operational data and transmitting said data within said analog and digital speed display device; means for processing said data from said receiving means; and means for displaying the processed data which comprises: a means for providing an analog and/or digital display of the actual speed of said vehicle; a means for providing an analog and/or digital display of the profile speed of said vehicle when a profile speed curve is in effect; and a means for providing an analog and/or digital display of the allowable speed of said vehicle.
Claim 3
Dependent Claim
28 words
The analog and digital speed display device according to claim 1, wherein said display means also includes means for providing a digital display of the distance to profile.
Claim 4
Dependent Claim
30 words
The analog and digital speed display device according to claim 1, wherein said means for providing an analog and/or digital display of the actual speed is a liquid crystal display.
Claim 5
Dependent Claim
30 words
The analog and digital speed display device according to claim 1, wherein said means for providing an analog and/or digital display of the allowable speed is a liquid crystal display.
Claim 6
Dependent Claim
30 words
The analog and digital speed display device according to claim 1, wherein said means for providing an analog and/or digital display of the profile speed is a liquid crystal display.
Claim 7
Dependent Claim
29 words
The analog and digital speed display device according to claim 2, wherein said means for providing a digital display of the distance to profile is a liquid crystal display.
Claim 8
Dependent Claim
25 words
The analog and digital speed display device according to claim 1, wherein said display means also includes a means for indicating overspeed of said vehicle.
Claim 9
Dependent Claim
22 words
The analog and digital speed display device according to claim 7, wherein said means for indicating overspeed is a liquid crystal display.
Claim 10
Dependent Claim
23 words
The analog and digital speed display device according to claim 8, wherein an audible alarm is synchronized to said means for indicating overspeed.
Claim 11
Dependent Claim
27 words
The analog and digital speed display device according to claim 1, wherein said display means also includes a means for displaying messages transmitted from said receiving means.
Claim 12
Dependent Claim
23 words
The analog and digital speed display device according to claim 10, wherein said means for displaying messages is an alpha-numeric liquid crystal display.
Claim 13
Dependent Claim
22 words
The analog and digital speed display device according to claim 1, wherein said display means also includes at least one indicator/input switch.
Claim 14
Dependent Claim
39 words
The analog and digital speed display device according to claim 1, wherein the analog display of said actual, allowable, and profile speeds is in the form of a continuous bar of liquid crystal display segments shaped in an arc.
Claim 15
Dependent Claim
19 words
The analog and digital speed display device according to claim 1, wherein said receiving means is a host processor.
Claim 16
Dependent Claim
21 words
The analog and digital speed display device according to claim 14, wherein said data processing means is a central processing unit.
Claim 17
Dependent Claim
27 words
The analog and digital speed display device according to claim 15, wherein said host processor interfaces with said central processing unit by means of a serial interface.
Claim 18
Dependent Claim
23 words
The analog and digital speed display device according to claim 15, wherein said central processing unit is electrically connected to a memory unit.
Claim 19
Dependent Claim
37 words
The analog and digital speed display device according to claim 1, wherein said data processing means receives actual speed data from an external speed probe via a programmable counter, whereby said display means operates as a speedometer.
Claim 20
Dependent Claim
43 words
The analog and digital speed display device according to claim 18, wherein said external speed probe is placed in operation either when said display means is to function solely as a speedometer or when said receiving means is not receiving said operational data.
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |