GB1111735A - Proximity sensing device - Google Patents
Proximity sensing deviceInfo
- Publication number
- GB1111735A GB1111735A GB2660266A GB2660266A GB1111735A GB 1111735 A GB1111735 A GB 1111735A GB 2660266 A GB2660266 A GB 2660266A GB 2660266 A GB2660266 A GB 2660266A GB 1111735 A GB1111735 A GB 1111735A
- Authority
- GB
- United Kingdom
- Prior art keywords
- proximity
- circuit
- transistor
- output
- june
- 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
- B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
- B66B13/24—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers
- B66B13/26—Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers between closing doors
Landscapes
- Electronic Switches (AREA)
Abstract
1,111,735. Proximity switches. DOVER CORPORATION (CANADA) Ltd. June 15, 1966 [June 28, 1965], No.26602/66. Heading G1N. A proximity switching arrangement such as a "touch switch" for a lift system comprises a stable (i. e. fixed frequency) oscillator loosely coupled to a resonant receiver having a capacitance sensor plate, whereby the proximity of a conductive body detunes the receiver and thus reduces its output to operate a relay. As shown transistor T1 is connected in a Colpitts oscillator circuit having its tank-circuit loosely coupled to a resonant receiver circuit L2, C6, including a sensor plate SP. The output is rectified at D1 and applied through an opposing Zener diode D2 to a transistor T2 which is biased to the ON-condition in the absence of an input signal to hold transistor T3 switched OFF. In operation, the coupling between L1, L2 is adjusted to provide sufficient output to switch T2 OFF, so that when the circuit is detuned by the proximity sensor, T2 switches on and cuts off T3, and the collector voltage rises to operate relay XL.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US46758065A | 1965-06-28 | 1965-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1111735A true GB1111735A (en) | 1968-05-01 |
Family
ID=23856277
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2660266A Expired GB1111735A (en) | 1965-06-28 | 1966-06-15 | Proximity sensing device |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1111735A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2175397A (en) * | 1983-11-22 | 1986-11-26 | Honda Motor Co Ltd | Devices for detecting objects |
EP3146116B1 (en) * | 2014-05-22 | 2020-04-22 | S.T.S.R. S.r.l. | Detection sensor |
-
1966
- 1966-06-15 GB GB2660266A patent/GB1111735A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2175397A (en) * | 1983-11-22 | 1986-11-26 | Honda Motor Co Ltd | Devices for detecting objects |
GB2175397B (en) * | 1983-11-22 | 1990-01-17 | Honda Motor Co Ltd | Devices for detecting objects |
EP3146116B1 (en) * | 2014-05-22 | 2020-04-22 | S.T.S.R. S.r.l. | Detection sensor |
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