GB408996A - Photo-electric control system for escalators, conveyors and the like - Google Patents
Photo-electric control system for escalators, conveyors and the likeInfo
- Publication number
- GB408996A GB408996A GB2561532A GB2561532A GB408996A GB 408996 A GB408996 A GB 408996A GB 2561532 A GB2561532 A GB 2561532A GB 2561532 A GB2561532 A GB 2561532A GB 408996 A GB408996 A GB 408996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- relay
- escalator
- motor
- photo
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B25/00—Control of escalators or moving walkways
Landscapes
- Escalators And Moving Walkways (AREA)
Abstract
408,996. Control of motors. FITZGERALD, A. S., 433, Warwick Road, Wynnewood, Pennsylvania, U.S.A. Sept. 14, 1932, No. 25615. [Class 38 (iii).] Travelling to predetermined limits.-A motordriven escalator or like endless-band conveyer is automatically started up by a photo-electric control circuit, and is stopped by time delay means after it has travelled a distance sufficient to carry an object or person to a required point. The presence of a person at the entrance of an escalator interrupts a light beam, and a light-sensitive device 4 acts through an amplifier 18 to close a relay 16 which causes a relay 10 to close contact 19 immediately, and start the motor 5 driving the escalator. Provided the light beam is not again intercepted, the relay 10 falls, and, after a time determined by a timing device 13, closes contacts 20 to stop the motor. Instead of a time relay a condenser may be provided which is charged through an electron tube under the control of the device 4, and is allowed to discharge over a high resistance. The voltage of the condenser is applied to the grid of a further electron tube which feeds a relay for the motor starter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2561532A GB408996A (en) | 1932-09-14 | 1932-09-14 | Photo-electric control system for escalators, conveyors and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2561532A GB408996A (en) | 1932-09-14 | 1932-09-14 | Photo-electric control system for escalators, conveyors and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB408996A true GB408996A (en) | 1934-04-16 |
Family
ID=10230531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2561532A Expired GB408996A (en) | 1932-09-14 | 1932-09-14 | Photo-electric control system for escalators, conveyors and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB408996A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0847956A1 (en) * | 1996-12-16 | 1998-06-17 | Inventio Ag | Device for monitoring the entry area of an escalator or moving walkway |
| US5923005A (en) * | 1996-12-16 | 1999-07-13 | Inventio Ag | Equipment for approach area monitoring for escalator and travelling walkways |
-
1932
- 1932-09-14 GB GB2561532A patent/GB408996A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0847956A1 (en) * | 1996-12-16 | 1998-06-17 | Inventio Ag | Device for monitoring the entry area of an escalator or moving walkway |
| US5923005A (en) * | 1996-12-16 | 1999-07-13 | Inventio Ag | Equipment for approach area monitoring for escalator and travelling walkways |
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