US3733075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for displaying randomly selected symbol combinations and randomly operative player operated symbol changing means therefor
Assignee: WAUKEGAN ELECTRONICS
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Filing: 1970-05-07
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Granted: 1973-05-15
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Expires: 1990-05-07
Abstract
Abstract An amusement game device of the slot machine type comprising rotating drums or electro-optical reels which form a combination of symbols at the end of a play cycle having a specified play value and which includes player activated means for changing at least one of the symbols of the combination to form a new combination which can have increased play value, thereby increasing the player participation in the game. The player activated means is preferably made operative for changing a symbol of a combination only at random during a series of successive plays of the apparatus by having a random selector means operatively associated with the player activated means.
Inventors
- 👤 D Hooker
- 👤 W Burnside
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:41
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/32; G07F17/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A slot machine-type amusement device having a plurality of display elements operative during a play cycle for displaying sequentially in a viewing area a plurality of slot machine-type symbols with each of said elements displaying in a selected portion of said viewing area a randomly selected slot machinetype symbol which together display at the end of the sequential display period a first combination of said symbols having a predetermined play value, the improvement comprising; a player actuated symbol changing means associated with one of said display elements which removes one of the said randomly selected symbols from one selected portion of said viewing area without introducing the said symbol into another portion of said viewing area and which thereafter displays another slot machine-type symbol in said one selected portion of the viewing area to form a second combination which can have an increased play value, and said player actuated symbol changing means having associated therewith a random selector means for rendering inoperative at random the said player actuated symbol changing means.
Claim 2
Dependent Claim
171 words
A slot machine-type amusement device having a plurality of display elements operative during a play cycle for displaying sequentially in a viewing area a plurality of slot machine-type symbols with each of said elements displaying in a selected portion of said viewing area a randomly selected slot machinetype symbol which together display at the end of the sequential display period a first combination of said symbols having a predetermined play value, the improvement comprising; a player actuated symbol changing means associated with one of said display elements which removes one of the said randomly selected symbols from one selected portion of said viewing area without introducing the said symbol into another portion of said viewing area and which thereafter displays another slot machine-type symbol in said one selected portion of the viewing area to form a second combination which can have an increased play value, and said player actuated symbol changing means having associated therewith a random selector means for rendering inoperative at random the said player actuated symbol changing means.
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) | 1976-05-14 | 1976-11-13 | 1977-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-14 | 1980-11-13 | 1981-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-14 | 1984-11-13 | 1985-05-15 | $7700.00 | Window Closed / Lapsed |