Patent US1506761A successfully refreshed from Google Patents.
Patent US3738443A successfully refreshed from Google Patents.
US3738443A
Expired / Lapsed
US
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Control system for the travel of a goods trolley
Assignee: Individual
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Filing: 1970-11-25
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Granted: 1973-06-12
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Expires: 1990-11-25
Abstract
Abstract A control system for controlling the travel of a goods trolley comprising a first detector for control of the travelling distance of the trolley and second and third paired detectors for control of the course of the trolley, all said detectors being mounted on the trolley and a detected member located along the trolley course for generating both analog and digital control indicia so as to cause the first detector to give a digital quantity and the second and third detectors to give an analog quantity, wherein the output from the first detector is calculated by a counter, the output from said counter is compared with a reference value for control of the distance to be covered by the trolley, and outputs from the second and third detectors are conducted to a differential amplifier, the trolley course being controlled until output from the differential amplifier attains a prescribed value.
Inventors
- 👤 M Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/02; G05D1/021; G05D1/0231
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
A control system for controlling the travel of a movable trolley along a course comprising: a trolley; at least one detected member located at a control location along the trolley course, each of said at least one detected member providing analog control information and each detected member including spaced elements providing digital control information; a first detector mounted on said trolley for detecting the digital information provided by said detected member; second and third paired detectors carried on said trolley for detecting the analog information provided by said detected member; a counter coupled to the output of said first detector for calculating a control signal corresponding to said digital information provided by said detected member; means for controlling the travelling distance of said trolley by comparing the output from said counter with a given reference value; a differential amplifier coupled to the outputs of said second and third detectors; and means responsive to the output of said differential amplifier for controlling the direction of the trolley course until the output from said differential amplifier attains a prescribed value.
Claim 2
Dependent Claim
178 words
A control system for controlling the travel of a movable trolley along a course comprising: a trolley; at least one detected member located at a control location along the trolley course, each of said at least one detected member providing analog control information and each detected member including spaced elements providing digital control information; a first detector mounted on said trolley for detecting the digital information provided by said detected member; second and third paired detectors carried on said trolley for detecting the analog information provided by said detected member; a counter coupled to the output of said first detector for calculating a control signal corresponding to said digital information provided by said detected member; means for controlling the travelling distance of said trolley by comparing the output from said counter with a given reference value; a differential amplifier coupled to the outputs of said second and third detectors; and means responsive to the output of said differential amplifier for controlling the direction of the trolley course until the output from said differential amplifier attains a prescribed value.
Claim 3
Dependent Claim
22 words
The control system according to claim 1 wherein said detected member is positioned along said course between said second and third detectors.
Claim 4
Dependent Claim
44 words
The control system according to claim 1 wherein said detected member comprises a conductor and said spaced elements comprise, a plurality of projections arranged crosswise of said conductor at an equal spacing and a power source for introducing low frequency current through said conductor.
Claim 5
Dependent Claim
22 words
The control system according to claim 3 wherein said projections formed crosswise of said conductor extend outward from both longitudinal sides thereof.
Claim 6
Dependent Claim
23 words
The control system according to claim 3 wheRein said projections formed crosswise of said conductor extend outward only from one longitudinal side thereof.
Claim 7
Dependent Claim
22 words
The control system according to claim 3 wherein said conductor extends in a direction parallel with the direction of said trolley course.
Claim 8
Dependent Claim
26 words
The control system according to claim 1 wherein said spaced elements comprises a plurality of light sources placed at an equal spacing adjacent the trolley course.
Claim 9
Dependent Claim
60 words
The control system according to claim 7 further comprising a pair of differential colored light sources positioned at each corner of the trolley course, an additional pair of detectors for detecting beams from said different colored light sources, and means for controlling the trolley course according to the outputs from each of said additional paired detectors and previously set instructions.
Claim 10
Dependent Claim
17 words
The control system according to claim 6 wherein said light sources are located above said trolley course.
Claim 11
Dependent Claim
23 words
The control system according to claim 6 wherein said light sources are arranged in a straight line in parallel with said trolley course.
References Cited (Backward Citations)
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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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |