US4637611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slot machine with reel position detector
Assignee: Universal Entertainment Corp
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Filing: 1982-01-11
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Granted: 1987-01-20
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Expires: 2002-01-11
Abstract
Abstract A slot machine having a plurality of reels each of which is provided with an annular row of symbols on its periphery and is driven and stopped by a pulse motor associated therewith. The position of the respective reel can be detected by the content of a counter which counts the pulse signals fed to the pulse motor during revolution of the reel, the counter being reset to zero photoelectrically at the same point in each revolution of the reel.
Inventors
- 👤 Norihiko Hamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:25
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/32; G07F17/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A slot machine having a plurality of reels each of which has an annular series of symbols on the peripheral surface thereof at regular intervals, comprising: pulse motors one individual to each said reel for driving the associated said reels; means for generating and emitting a series of pulse signals, motor driving means receiving said pulse signals and causing said pulse motors to rotate by one step for every received pulse signal; means for detecting a predetermined point on each said reel once every revolution thereof; and means to count said pulse signals and to reset to zero its previous contents by a signal from said predetermined point detecting means for detecting the stopped positions of said reels according to the number of said counted pulse signals.
Claim 2
Dependent Claim
127 words
A slot machine having a plurality of reels each of which has an annular series of symbols on the peripheral surface thereof at regular intervals, comprising: pulse motors one individual to each said reel for driving the associated said reels; means for generating and emitting a series of pulse signals, motor driving means receiving said pulse signals and causing said pulse motors to rotate by one step for every received pulse signal; means for detecting a predetermined point on each said reel once every revolution thereof; and means to count said pulse signals and to reset to zero its previous contents by a signal from said predetermined point detecting means for detecting the stopped positions of said reels according to the number of said counted pulse signals.
Claim 3
Dependent Claim
62 words
A slot machine as claimed in claim 1, said predetermined point detecting means comprising a light shield member at said fixed point on each said reel and a light sensing means comprising a light emitting source and a light receiving element in fixed positions opposite to and spaced from each other so as to permit said light shield member to pass therebetween.
Claim 4
Dependent Claim
41 words
A slot machine as claimed in claim 2, said predetermined point detecting means comprising means for detecting a trailing edge of a signal provided by said light sensing means characteristic of the interruption of the light by said light shield member.
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) | 1990-01-19 | 1990-07-21 | 1991-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-19 | 1994-07-21 | 1995-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-19 | 1998-07-21 | 1999-01-20 | $7700.00 | Window Closed / Lapsed |