US3596400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Model railroad freight dumping car assembly
Assignee: Tyco Toys Inc
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Filing: 1968-11-06
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Granted: 1971-08-03
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Expires: 1988-11-06
Abstract
Abstract A wheeled chassis carrying a swingable dumping body, the chassis having electromagnet means and the body carrying an armature cooperating with the electromagnet means to effect a swinging, dumping action upon energization of the electromagnet means.
Inventors
- 👤 Richard C M Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:42
CPC Classifications
A; A63; A63H; A63H19/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
A model railroad freight dumping car comprising a chassis, wheeled running gear supporting said chassis for movement along a track, a body superposed on said chassis, pivot means along one side of said chassis mounting said body on said chassis for movement between a generally horizontal load-carrying position over said chassis and a dumping position swung about said pivot means upwardly toward one side of said chassis, electromagnetic means mounted on said chassis beneath said body and having a pair of pole faces located in spaced relation along said one side of said chassis, an armature carried by said body depending only partially into the interpole space when said body is in its loadcarrying position, said armature being movable with said body upon swinging movement thereof toward its dumping position to increase the armature occupancy of the interpole space, whereby energization of said electromagnetic means with said body in its load-carrying position provides a substantial magnetic field path through said armature and urges said armature to occupy a maximum of said interpole space to effect swinging of said body to its dumping position.
Claim 2
Dependent Claim
183 words
A model railroad freight dumping car comprising a chassis, wheeled running gear supporting said chassis for movement along a track, a body superposed on said chassis, pivot means along one side of said chassis mounting said body on said chassis for movement between a generally horizontal load-carrying position over said chassis and a dumping position swung about said pivot means upwardly toward one side of said chassis, electromagnetic means mounted on said chassis beneath said body and having a pair of pole faces located in spaced relation along said one side of said chassis, an armature carried by said body depending only partially into the interpole space when said body is in its loadcarrying position, said armature being movable with said body upon swinging movement thereof toward its dumping position to increase the armature occupancy of the interpole space, whereby energization of said electromagnetic means with said body in its load-carrying position provides a substantial magnetic field path through said armature and urges said armature to occupy a maximum of said interpole space to effect swinging of said body to its dumping position.
Claim 3
Dependent Claim
37 words
A model railroad freight dumping car according to claim 1, in combination with a coil compression spring having opposite ends in bearing engagement with said chassis and body, respectively, to urge the latter toward its load-carrying position.
Claim 4
Dependent Claim
85 words
A model railroad freight dumping car according to claim 1, in combination with a barrier pivoted to said body adjacent to said one side of said chassis and swingable between an upstanding load retaining position when said body is in its load-carrying position and an outwardly and downwardly swung position when said body is in its dumping position, and cam means on said chassis engageable with said barrier to effect upward swinging thereof to its load-retaining position when said body swings to its load-carrying position.
Claim 5
Dependent Claim
34 words
A model railroad freight dumping car according to claim 1, said electromagnetic means comprising a generally U-shaped electromagnet fixed generally horizontally on said chassis with its legs extending laterally toward said one chassis side.
Claim 6
Dependent Claim
41 words
A model railroad freight dumping car according to claim 4, in combination with contacts on the other side of said chassis for electrical connection to a power supply, and conductors connecting said contacts directly to opposite ends of said electromagnet means.
Claim 7
Dependent Claim
48 words
A model railroad freight dumping car according to claim 5, in combination with an upstanding support for location along a track, a plurality of resilient conductor strips carried by said support for yieldable engagement with respective contacts, and conductor means for connecting said strips to a power supply.
Claim 8
Dependent Claim
55 words
A model railroad freight dumping car according to claim 6, said support being provided with pairs of spaced slots, each of said conductor strips having spaced portions slidably received in the slots of a respective pair with the strip portion intermediate said spaced portions extending toward the track for engagement with one of said contacts.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |