Patent US4665833A successfully refreshed from Google Patents.
US4665833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature electric track and train
Assignee: Individual
•
Filing: 1981-09-11
•
Granted: 1987-05-19
•
Expires: 2001-09-11
Abstract
Abstract A miniature electric track and train system which provides a simple and inexpensive arrangement for the simultaneous independent operation of at least two electric engines on the same track.
Inventors
- 👤 Herman B. Fleishman
- 👤 administratrix Janis L. Fleishman
- 👤 David B. Lightbody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:36
CPC Classifications
A; A63; A63H; A63H19/00; A63H19/30; A63H19/24; Y; Y10; Y10S; Y10S104/00; Y10S104/01
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
339 words
A miniature electrical track and train system for independently operating three miniature electric train engines simultaneously on the same track using three separate power supplies, said system comprising: (a) a pair of substantially equidistant, prototypically appearing electrically energizable running rails, each rail having a substantially flat, continuous railhead, each rail being divided into two rail elements, each rail element being electrically insulated from the other; (b) a first engine electrical contact wheel set adapted for mounting on a first engine for supplying electrical power derived from said running rails to said engine, said first wheel set comprising two prototypically appearing wheels, each of said wheels consisting of a conducting flange and a cylindrical boss segregated into two annular portions, a first, conducting portion contiguous said flange and a second, insulating portion contiguous said first portion; (c) a second engine electrical contact wheel set adapted for mounting on a second engine for supplying electrical power derived from said running rails to said engine, said second wheel set comprising two prototypically appearing wheels, each of said wheels consisting of an insulating flange and a cylindrical boss segregated into two annular portions, a first, insulating portion contiguous said flange and a second, conducting portion contiguous said first portion; (d) a third engine electrical contact wheel set adapted for mounting on a third engine for supplying electrical power derived from said running rails to said engine, said third wheel set comprising two prototypically appearing wheels, one of said wheels consisting of an insulating flange and a cylindrical boss segregated into two annular portions, a first, insulating portion contiguous said flange and a second, conducting portion contiguous said first portion, the other of said wheels consisting of a conducting flange and a cylindrical boss segregated into two annular portions, a first, conducting portion contiguous said flange and a second, insulating portion contiguous said first portion; and (e) said four rail elements being adapted for connection to three power supplies to form three independent electrical power and control circuits, one for each of said engines.
Claim 2
Dependent Claim
339 words
A miniature electrical track and train system for independently operating three miniature electric train engines simultaneously on the same track using three separate power supplies, said system comprising: (a) a pair of substantially equidistant, prototypically appearing electrically energizable running rails, each rail having a substantially flat, continuous railhead, each rail being divided into two rail elements, each rail element being electrically insulated from the other; (b) a first engine electrical contact wheel set adapted for mounting on a first engine for supplying electrical power derived from said running rails to said engine, said first wheel set comprising two prototypically appearing wheels, each of said wheels consisting of a conducting flange and a cylindrical boss segregated into two annular portions, a first, conducting portion contiguous said flange and a second, insulating portion contiguous said first portion; (c) a second engine electrical contact wheel set adapted for mounting on a second engine for supplying electrical power derived from said running rails to said engine, said second wheel set comprising two prototypically appearing wheels, each of said wheels consisting of an insulating flange and a cylindrical boss segregated into two annular portions, a first, insulating portion contiguous said flange and a second, conducting portion contiguous said first portion; (d) a third engine electrical contact wheel set adapted for mounting on a third engine for supplying electrical power derived from said running rails to said engine, said third wheel set comprising two prototypically appearing wheels, one of said wheels consisting of an insulating flange and a cylindrical boss segregated into two annular portions, a first, insulating portion contiguous said flange and a second, conducting portion contiguous said first portion, the other of said wheels consisting of a conducting flange and a cylindrical boss segregated into two annular portions, a first, conducting portion contiguous said flange and a second, insulating portion contiguous said first portion; and (e) said four rail elements being adapted for connection to three power supplies to form three independent electrical power and control circuits, one for each of said engines.
Claim 3
Dependent Claim
13 words
A system according to claim 1 wherein said annular portions are approximately equal.
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) | 1990-05-18 | 1990-11-17 | 1991-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-18 | 1994-11-17 | 1995-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-18 | 1998-11-17 | 1999-05-19 | $7700.00 | Window Closed / Lapsed |