US4038926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trolley conveyor system with magnetically actuated reading means
Assignee: Redman Fisher Engineering Ltd
•
Filing: 1976-05-14
•
Granted: 1977-08-02
•
Expires: 1996-05-14
Abstract
Abstract A conveyor comprising a trolley movable along a track and having at least one elongate member of ferromagnetic material which is settable in a position selected according to a code to convey information concerning the destination of the trolley. At a reading station on the track, there is a row of magnetically-operated switches with magnetic shields between them. With each switch there is associated a pair of magnets disposed on opposite sides of the switch with one magnet of the pair between the switch and the path followed by the elongate member through the reading station. When aligned with the magnets of a switch, the elongate member operates the switch as the member passes through the reading station.
Inventors
- 👤 Charles Thomas Holberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:17
CPC Classifications
B; B65; B65G; B65G47/00; B65G47/34; B65G47/46; B65G47/48; B65G47/485
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
186 words
In a conveyor system comprising a track, a trolley which runs along the track, information-carrying means on the trolley and reading means at a reading station on the track for reading information from the information-carrying means as the trolley passes through the reading station, the improvement wherein the reading means comprises a switch and two magnets associated therewith, said switch being adapted to be actuated by changes in the field of said magnets, said magnets being arranged on opposite sides of the switch; one magnet being situated between the switch and the path followed by the information-carrying means when the trolley moves through the reading station; both of said magnets being arranged with their respective poles spaced apart in a direction substantially parallel to said path, one of said magnets being off-set in the direction of its length from the other of said magnets; said switch and said magnets being disposed in a space; and screens of ferro-magnetic material arranged on opposite sides of said space, each screen extending from a position adjacent one of said magnets to a position adjacent the other of said magnets.
Claim 2
Dependent Claim
186 words
In a conveyor system comprising a track, a trolley which runs along the track, information-carrying means on the trolley and reading means at a reading station on the track for reading information from the information-carrying means as the trolley passes through the reading station, the improvement wherein the reading means comprises a switch and two magnets associated therewith, said switch being adapted to be actuated by changes in the field of said magnets, said magnets being arranged on opposite sides of the switch; one magnet being situated between the switch and the path followed by the information-carrying means when the trolley moves through the reading station; both of said magnets being arranged with their respective poles spaced apart in a direction substantially parallel to said path, one of said magnets being off-set in the direction of its length from the other of said magnets; said switch and said magnets being disposed in a space; and screens of ferro-magnetic material arranged on opposite sides of said space, each screen extending from a position adjacent one of said magnets to a position adjacent the other of said magnets.
Claim 3
Dependent Claim
96 words
The improvement according to claim 1 wherein the reading means comprises a plurality of switches arranged in a row extending transversely of the track, a pair of spaced magnets associated with each of said switches, each switch being disposed between the magnets of a corresponding pair, one magnet of each pair being situated between the associated switch and the path followed by the information-carrying means when the trolley moves through the reading station and a plurality of screens of ferro-magnetic material, one of said screens being located between each pair of adjacent switches in the row.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |