Patent US4530105A successfully refreshed from Google Patents.
US4530105A
Expired / Lapsed
US
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Lap counter
Assignee: LAP COUNT TECHNOLOGIES Inc AN IL Corp
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Filing: 1982-06-01
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Granted: 1985-07-16
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Expires: 2002-06-01
Abstract
Abstract An automatic lap counting device for use by swimmers and runners, for example, which depends upon the change in the magnetic line of force of the North/South magnetic field for determining the laps.
Inventors
- 👤 Jonathan Rabinowitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:53
CPC Classifications
A; A63; A63B; A63B71/00; A63B71/06; A63B71/0686; G; G01; G01R; G01R33/00; G01R33/02; G01R33/038; G06; G06M; G06M1/00; G06M1/08; G06M1/10; G06M1/108; G06M3/00; G06M3/06; G07; G07C; G07C1/00; G07C1/22; A63B2244/00; A63B2244/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
78 words
An automatic lap counting device comprising: means for attaching said device to a user, means for detecting a change of direction of magnetic flux caused by the user's change of direction, relative to magnetic lines of force in the earth's field; means for producing a pulse corresponding to said change in direction of magnetic flux, means for counting said pulses, and means for displaying the counted pulses, the counted pulses correlating proportionally to the number of laps traversed.
Claim 2
Dependent Claim
78 words
An automatic lap counting device comprising: means for attaching said device to a user, means for detecting a change of direction of magnetic flux caused by the user's change of direction, relative to magnetic lines of force in the earth's field; means for producing a pulse corresponding to said change in direction of magnetic flux, means for counting said pulses, and means for displaying the counted pulses, the counted pulses correlating proportionally to the number of laps traversed.
Claim 3
Dependent Claim
22 words
The automatic lap counting device of claim 1 wherein said means for displaying the counted pulses comprises a liquid crystal display device.
Claim 4
Dependent Claim
50 words
The automatic lap counting device of claim 2 wherein said means for attaching said device to the user comprises case means for said display means, said case means being in the form of a watch case, and strap means for attaching said case means to the arm of the user.
Claim 5
Dependent Claim
19 words
The automatic lap counting device of claim 1 wherein said means for displaying the counted pulses comprises audio means.
Claim 6
Dependent Claim
41 words
The automatic lap counting device of claim 1 wherein said means for attaching said device to a user comprises means for attaching said display means to swimming goggles to enable a swimmer to be apprised of the number of laps traversed.
Claim 7
Dependent Claim
66 words
The automatic lap counting device of claim 1 wherein said means for detecting changes of direction of magnetic flux caused by the user's change of direction comprises magnet means, switch means for closing a circuit to actuate said displaying means, and means coupled to said magnet means for operating said switch means responsive to rotating of said magnet means through an angle of more than 180°.
References Cited (Backward Citations)
US2089914A
Cited
SU122290A1
Cited
DE2337435A1
Cited
US4013945A
Cited
US4220996A
Cited
SU883939A1
Cited
US4371945A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |