Patent US4825174A successfully refreshed from Google Patents.
Patent US4840377A successfully refreshed from Google Patents.
US4840377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical tape boundary sensor apparatus
Assignee: C FREDERICK BOWSER
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Filing: 1987-12-14
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Granted: 1989-06-20
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Expires: 2007-12-14
Abstract
Abstract A system is provided that analyzes the output voltage caused by the impact of an object, particularly a tennis ball, relative to a boundry line. It combines sensors mounted on a tennis court's surface with computer graphics and data acquisition software that indicates to a tennis umpire, line judge or player that the ball or other object has struck a boundary line.
Inventors
- 👤 C. Frederick Bowser
- 👤 John L. Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:48
CPC Classifications
A; A63; A63B; A63B71/00; A63B71/06; A63B71/0605; A63B2071/0611
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
240 words
A tape boundary sensor apparatus comprising: (a) elongated sensor means adapted to be positioned along various boundary lines; (b) conditioning circuit means electrically connected to the sensor means for filtering out unwanted signals and fluctuations from an output waveform of the sensor means; (c) multiplexer means electrically connected to the conditioning circuit means for scanning the output of the sensor means for identifying a particular sensor of the sensor means which has been impacted by an object; (d) analog to digital converter means for converting the analog output waveform of the sensor means to a proportional digital word; (e) processor and memory means electrically connected to the converter means and to the multiplexer means for comparing the output waveform to known pre-set thresholds of: (i) slope of the initial section of a known output waveform of the sensor for determination of the surface area of impact; (ii) peak voltage of a known output waveform of the sensor for determination of the force of impact; (iii) a known duration of impact; wherein the slope, peak voltage, and duration are compared to the pre-set thresholds to determine and confirm what kind of object impacted the sensor; and (g) indicator means connected to the processor and memory means; wherein an impact on a sensor causes a voltage output therefrom and the processor makes a determination whether a ball has caused the impact, and directs the results of the analysis to the indicator means.
Claim 2
Dependent Claim
240 words
A tape boundary sensor apparatus comprising: (a) elongated sensor means adapted to be positioned along various boundary lines; (b) conditioning circuit means electrically connected to the sensor means for filtering out unwanted signals and fluctuations from an output waveform of the sensor means; (c) multiplexer means electrically connected to the conditioning circuit means for scanning the output of the sensor means for identifying a particular sensor of the sensor means which has been impacted by an object; (d) analog to digital converter means for converting the analog output waveform of the sensor means to a proportional digital word; (e) processor and memory means electrically connected to the converter means and to the multiplexer means for comparing the output waveform to known pre-set thresholds of: (i) slope of the initial section of a known output waveform of the sensor for determination of the surface area of impact; (ii) peak voltage of a known output waveform of the sensor for determination of the force of impact; (iii) a known duration of impact; wherein the slope, peak voltage, and duration are compared to the pre-set thresholds to determine and confirm what kind of object impacted the sensor; and (g) indicator means connected to the processor and memory means; wherein an impact on a sensor causes a voltage output therefrom and the processor makes a determination whether a ball has caused the impact, and directs the results of the analysis to the indicator means.
Claim 3
Dependent Claim
53 words
A tape boundary sensor apparatus according to claim 1 wherein said indicator means provides an illustration of said game court on a computer display means and plots the location of the occurrence of an impact at a location on the display corresponding to a location on the game court where the impact occurred.
Claim 4
Dependent Claim
24 words
A tape boundary sensor apparatus according to claim 1 further comprising painted boundary lines placed on an upward facing side of the sensor means.
Claim 5
Dependent Claim
18 words
A tape boundary sensor apparatus according to claim 1 further comprising tape means provided over said sensor means.
Claim 6
Dependent Claim
17 words
A tape boundary sensor apparatus according to claim 1 wherein said sensor means is a piezoelectric sensor.
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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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |