GB860396A - Improvements relating to limit switching apparatus - Google Patents
Improvements relating to limit switching apparatusInfo
- Publication number
- GB860396A GB860396A GB1143558A GB1143558A GB860396A GB 860396 A GB860396 A GB 860396A GB 1143558 A GB1143558 A GB 1143558A GB 1143558 A GB1143558 A GB 1143558A GB 860396 A GB860396 A GB 860396A
- Authority
- GB
- United Kingdom
- Prior art keywords
- door
- shut
- bridge
- transductor
- winding
- 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
- B66B1/00—Control systems of elevators in general
- B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
- B66B1/46—Adaptations of switches or switchgear
- B66B1/50—Adaptations of switches or switchgear with operating or control mechanisms mounted in the car or cage or in the lift well or hoistway
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power-Operated Mechanisms For Wings (AREA)
- Control Of Linear Motors (AREA)
Abstract
860,396. Control of motors. PEEBLES & CO. Ltd., B., and HIGGINS, L. J. April 9, 1959 [April 28, 1958], No. 11435/58. Class 38 (3). [Also in Groups XXXVI and XXXIX] A method of detecting when a moving member reaches a given point involves the use of a ferromagnetic core with a winding, the inductance of which is caused to vary by its juxtaposition with an armature at the given point, the variation of inductance being detected and used to operate a bi-stable circuit. As shown in Fig. 1, two armatures 12, attached to a door which it is necessary should be shut before coal loading is started automatically, are situated adjacent the ends of U-shaped cores 13 when the door is shut and consequently alter the impedance of windings 14 in an A.C. bridge. When the door is open the bridge is balanced with limbs 14, 15, resonant at the supply frequency. When the door is shut the bridge is thrown out of balance and provides an output over rectifier 33, 34 to the input winding 29 of an auto-self-excited transductor 21 having bias windings 25 and positive feed-back on winding 28. The transductor is bi-stable so that once triggered over winding 29 it delivers D.C. to a load 11 which initiates coal loading. If two doors are involved in the system each door may have its own bridge circuit, the outputs of which are applied to an AND or an OR gate to trigger a bi-stable transductor so that loading takes place only when either door is shut or only when both are shut or open. To this end the bridge outputs may be used to inhibit a bias which is normally applied to the transductor. The invention is said to be applicable to the landing stage control of lift gear.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1143558A GB860396A (en) | 1958-04-10 | 1958-04-10 | Improvements relating to limit switching apparatus |
| BE577497A BE577497A (en) | 1958-04-10 | 1959-04-08 | |
| FR791596A FR1225204A (en) | 1958-04-10 | 1959-04-09 | Non-contact differential limit switch |
| CH355841D CH355841A (en) | 1958-04-10 | 1959-04-10 | Electric control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1143558A GB860396A (en) | 1958-04-10 | 1958-04-10 | Improvements relating to limit switching apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB860396A true GB860396A (en) | 1961-02-01 |
Family
ID=9986207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1143558A Expired GB860396A (en) | 1958-04-10 | 1958-04-10 | Improvements relating to limit switching apparatus |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE577497A (en) |
| CH (1) | CH355841A (en) |
| FR (1) | FR1225204A (en) |
| GB (1) | GB860396A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661732A (en) * | 2016-09-09 | 2019-04-19 | 阿姆有限公司 | CEM conversion equipment |
-
1958
- 1958-04-10 GB GB1143558A patent/GB860396A/en not_active Expired
-
1959
- 1959-04-08 BE BE577497A patent/BE577497A/xx unknown
- 1959-04-09 FR FR791596A patent/FR1225204A/en not_active Expired
- 1959-04-10 CH CH355841D patent/CH355841A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109661732A (en) * | 2016-09-09 | 2019-04-19 | 阿姆有限公司 | CEM conversion equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| BE577497A (en) | 1959-07-31 |
| CH355841A (en) | 1961-07-31 |
| FR1225204A (en) | 1960-06-29 |
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