US4578044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically movable model toy
Assignee: Masudaya Corp
•
Filing: 1984-07-30
•
Granted: 1986-03-25
•
Expires: 2004-07-30
Abstract
Abstract A toy including a movable model, components for generating and alternating a magnetic field in response to a direct current, a permanent magnet disposed in the generated magnetic field, and a component for transmitting movement of the permanent magnet in the generated magnetic field to the movable model.
Inventors
- 👤 Shigeru Saitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/26
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
121 words
A toy, comprising: a vessel having a base portion; a fluid contained within said vessel; a buoyant moveable model buoyantly supported by said fluid; means for generating and alternating a magnetic field in response to a direct current; a permanent magnet located on said base portion, disposed in said generated magnetic field and moveable in response to the latter; and means for transmitting the movement of said permanent magnet in said generated magnetic field to said moveable model, said transmitting means including a string having ends respectively attached to said permanent magnet and said moveable model so that movement of said permanent magnet in said generated magnetic field causes said string to move thereby transmitting said movement to said moveable model.
Claim 2
Dependent Claim
121 words
A toy, comprising: a vessel having a base portion; a fluid contained within said vessel; a buoyant moveable model buoyantly supported by said fluid; means for generating and alternating a magnetic field in response to a direct current; a permanent magnet located on said base portion, disposed in said generated magnetic field and moveable in response to the latter; and means for transmitting the movement of said permanent magnet in said generated magnetic field to said moveable model, said transmitting means including a string having ends respectively attached to said permanent magnet and said moveable model so that movement of said permanent magnet in said generated magnetic field causes said string to move thereby transmitting said movement to said moveable model.
Claim 3
Dependent Claim
14 words
The toy as defined in claim 1, wherein said permanent magnet is relatively small.
Claim 4
Dependent Claim
26 words
The toy as defined in claim 1, wherein said movable model is a fish having a mouth in which is attached an end of said string.
Claim 5
Dependent Claim
20 words
The toy as defined in claim 1, wherein said vessel is hemispherically shaped and said base portion has a depression.
Claim 6
Dependent Claim
23 words
The toy as defined in claim 4, wherein said permanent magnet is disposed in said depression of said base portion of said vessel.
Claim 7
Dependent Claim
13 words
The toy as defined in claim 1, wherein said fluid is a liquid.
Claim 8
Dependent Claim
12 words
The toy as defined in claim 6, wherein said liquid is water.
Claim 9
Dependent Claim
55 words
The toy as defined in claim 4, wherein said magnetic field generating and alternating means includes a coil, a former, and a housing having a center, said coil being formed around said former and disposed in said center of said housing below said depressed base portion of said vessel which is mounted on said housing.
Claim 10
Dependent Claim
14 words
The toy as defined in claim 8, wherein said former contains a central core.
Claim 11
Dependent Claim
23 words
The toy as defined in claim 9; further comprising an open mouthed casing of magnetic material in which said central core is disposed.
Claim 12
Dependent Claim
26 words
The toy as defined in claim 10, wherein said open mouthed casing of magnetic material is cylindrically shaped and said central core is composed of iron.
Claim 13
Dependent Claim
31 words
The toy as defined in claim 10, wherein said open mouthed casing of magnetic material has a base extending to form a magnetic path from said central core below said former.
Claim 14
Dependent Claim
40 words
The toy as defined in claim 11, wherein said central iron core has an upper end that is an axial pole and said cylindrically shaped open mouthed casing of magnetic material has a curved wall that is a peripheral pole.
Claim 15
Dependent Claim
28 words
The toy as defined in claim 8, wherein said means for generating and alternating a magnetic field in response to a direct current is disposed in said housing.
Claim 16
Dependent Claim
97 words
The toy as defined in claim 1, wherein said means for generating and alternating a magnetic field in response to a direct current includes first and second pairs of NAND gates, first and second pairs of resistances and first, second, third, and fourth transistors, said first pair of NAND gates constituting a multivibrator circuit having an output regulated by said second pair of NAND gates supplying said output of said multivibrator circuit through said first and second pairs of resistances to the bases of said first, second, third, and fourth transistors arranged in a balanced bridge circuit.
Claim 17
Dependent Claim
65 words
The toy as defined in claim 15, wherein said means for generating and alternating a magnetic field in response to a direct current further includes a coil having ends respectively connected to the junction of the collector of said first transistor and the emitter of said second transistor and the junction of the collector of said third transistor and the emitter of said fourth transistor.
Claim 18
Dependent Claim
53 words
The toy as defined in claim 15, wherein said means for generating and alternating a magnetic field in response to a direct current further includes a switch connecting the direct current across the common collector junction of said second and fourth transistors and the common emitter junction of said first and third transistors.
Claim 19
Dependent Claim
55 words
The toy as defined in claim 16, wherein a one of said second pair of NAND gates has an output that is high causing said first and fourth transistors to be switched on through said first pair of resistances so that a one end of said coil becomes negative and the other end becomes positive.
Claim 20
Dependent Claim
56 words
The toy as defined in claim 16, wherein the other one of said second pair of NAND gates has an output that is high causing said second and third transistors to be switched on through said second pair of resistances so that said one end of said coil becomes positive and said other end becomes negative.
References Cited (Backward Citations)
GB242927A
Cited
US2774185A
Cited
US3239956A
Cited
US3425157A
Cited
US3596146A
Cited
US3783550A
Cited
US4047323A
Cited
US4282681A
Cited
SU1045898A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |