US4373725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pinball machine having magnetic ball control
Assignee: Bank of America Illinois
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Filing: 1980-10-24
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Granted: 1983-02-15
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Expires: 2000-10-24
Abstract
Abstract Magnetic control of a ball on a pinball playfield is provided by an electromagnet located on the playfield and a mechanism manually operable by a player for energizing the electromagnet. The energizing mechanism includes a first switch external on the playfield operable by player and a second switch on the playfield which is activated by a ball hitting a target thereon. The first and second switch are connected in series with the electromagnet to control the latter. A timing mechanism is provided to limit the energization of the electromagnet to a predetermined time period.
Inventors
- 👤 Steven S. Ritchie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:52
CPC Classifications
A; A63; A63F; A63F7/00; A63F7/22; A63F7/24; A63F7/26; A63F7/0088; A63F7/30; A63F7/305; A63F7/3065; A63F2007/0094; A63F2250/00; A63F2250/10; A63F2250/1063; A63F2250/1073
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
125 words
An improved pinball machine including an inclined playfield having targets, balls susceptible to magnetic attraction, and a means for propelling said balls into play upon said playfield, the improvement comprising: (a) an electromagnet operatively associated with said playfield; (b) a first switch external of said playfield which can be activated by a player; (c) a second switch which is actuated by a ball operating one or more targets on said playfield; and (d) said electromagnet, said first switch, and said second switch connected in circuit so that a ball which hits said target thereby activating said second switch may thereafter be selectively attracted by said electromagnet upon activation of said first switch by the player thereby to alter or stop the motion of such ball.
Claim 2
Dependent Claim
125 words
An improved pinball machine including an inclined playfield having targets, balls susceptible to magnetic attraction, and a means for propelling said balls into play upon said playfield, the improvement comprising: (a) an electromagnet operatively associated with said playfield; (b) a first switch external of said playfield which can be activated by a player; (c) a second switch which is actuated by a ball operating one or more targets on said playfield; and (d) said electromagnet, said first switch, and said second switch connected in circuit so that a ball which hits said target thereby activating said second switch may thereafter be selectively attracted by said electromagnet upon activation of said first switch by the player thereby to alter or stop the motion of such ball.
Claim 3
Dependent Claim
49 words
The pinball machine of claim 1 further comprising a timing means connected in circuit with said electromagnet, said first switch, and said second switch for limiting the time during which the electromagnet can be energized to a predetermined time period thereby preventing a player from continuously energizing said electromagnet.
Claim 4
Dependent Claim
14 words
The pinball machine according to claim 2 wherein said timing means comprises a monostable.
Claim 5
Dependent Claim
44 words
The pinball machine according to claim 2 wherein said timing means, upon timing out, resets said second switch thereby requiring the player to again activate said second switch by hitting said target with a ball before said electromagnet can be energerized by the player.
Claim 6
Dependent Claim
83 words
The pinball machine according to claims 1, 2, 3, or 4 further comprising an out-hole at the lower end of said playfield, a player controlled flipper located adjacent the out-hole, and an exit lane having an entry port located at a higher level on said playfield than said flipper, said electromagnet located lateral of said entry port thereby providing the player with an opportunity to prevent a ball from entering said entry port by energizing said electromagnet to attract said ball away therefrom.
Claim 7
Dependent Claim
97 words
An improved pinball machine including an inclined playfield having targets, balls susceptible to magnetic attraction, and a means for propelling said balls into play upon said playfield, the improvement comprising: (a) an electromagnet operatively associated with said playfield; (b) a first switch external of said playfield which can be activated by a player to energize said electromagnet; and (c) a timing means connected in circuit with said electromagnet and said first switch for limiting the time during which the electromagnet can be energized to a predetermined time period thereby preventing a player from continuously energizing said electromagnet.
Claim 8
Dependent Claim
97 words
An improved pinball machine including an inclined playfield having targets, balls susceptible to magnetic attraction, and a means for propelling said balls into play upon said playfield, the improvement comprising: (a) an electromagnet operatively associated with said playfield; (b) a first switch external of said playfield which can be activated by a player to energize said electromagnet; and (c) a timing means connected in circuit with said electromagnet and said first switch for limiting the time during which the electromagnet can be energized to a predetermined time period thereby preventing a player from continuously energizing said electromagnet.
Claim 9
Dependent Claim
61 words
The pinball machine according to claim 6 further including a means in circuit with said electromagnet and said first switch for preventing the activation of said electromagnet until one ball operates at least one designated target on said playfield so that said one ball may thereafter be selectively attracted by the player to alter or stop the motion of such ball.
Claim 10
Dependent Claim
31 words
The pinball machine according to claim 7 wherein said preventing means comprises a second switch associated with one or more targets on said playfield responsive to a ball striking said targets.
Claim 11
Dependent Claim
14 words
The pinball machine according to claim 6 wherein said timing means comprises a monostable.
Claim 12
Dependent Claim
40 words
The pinball machine according to claim 7 wherein said timing means, upon timing out, resets said preventing means thereby requiring the player to again activate said designated target with a ball before said electromagnet can be energized by the player.
Claim 13
Dependent Claim
84 words
The pinball machine according to claims 6, 7, 8, 9, or 10 further comprising an out-hole at the lower end of said playfield, a player controlled flipper located adjacent the out-hole, and an exit lane having an entry port located at a higher level on said playfield than said flipper, said electromagnet located lateral of said entry port thereby providing the player with an opportunity to prevent a ball from entering said entry port by energizing said electromagnet to attract said ball away therefrom.
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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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |