GB836435A - Protection of electronic apparatus from current and voltage surges - Google Patents
Protection of electronic apparatus from current and voltage surgesInfo
- Publication number
- GB836435A GB836435A GB26527/57A GB2652757A GB836435A GB 836435 A GB836435 A GB 836435A GB 26527/57 A GB26527/57 A GB 26527/57A GB 2652757 A GB2652757 A GB 2652757A GB 836435 A GB836435 A GB 836435A
- Authority
- GB
- United Kingdom
- Prior art keywords
- surges
- rails
- track circuit
- transistor
- capacitor
- 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
- 239000003990 capacitor Substances 0.000 abstract 3
- 230000003068 static effect Effects 0.000 abstract 3
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000001052 transient effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L1/00—Devices along the route controlled by interaction with the vehicle or train
- B61L1/18—Railway track circuits
- B61L1/181—Details
- B61L1/187—Use of alternating current
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
- B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
- B61L7/068—Protection against eddy-currents, short-circuits, or the like, for electric safety arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
836,435. Railway track circuit protective devices. GENERAL RAILWAY SIGNAL CO. Aug. 22, 1957 [Sept. 4, 1956], No. 26527/57. Class 105. [Also in Group XXXV] A push-pull electronic amplifying stage, particularly a push-pull transistor amplifying stage in a railway track circuit, is protected from voltage surges due, e.g. to lightning, external voltage surges and static discharges by means of a capacitor 36 connected across one diagonal of a rectifying bridge 37-40 which bridge is connected across the output 41, 42 of the push-pull amplifying stage 22-25 so as to absorb the transient voltage surges applied thereto, e.g. from the track rails 5 via the track circuit feed transformer T2, the condenser 36 absorbing the surges and having internal leakage characteristics to dissipate the excessive charge due to the surges. As shown, the capacitor 36, which may be an electrolytic condenser, has its positive terminal connected in common to all the transistor emitters of the amplifier and to the mid-point 29 of an input transformer T1 to the transistors and to the positive terminal of a transistor biasing D.C. source 13. The amplifier is fed from a transistor oscillator stage. In the railway track circuit shown, a lightning arrester 33 is connected across the rails to provide an equalizing path between the rails for relatively high voltage static discharges, the capacitor 36 absorbing the energy for relatively low voltage static discharges. Other lightning arresters 32, 34, are connected between the respective rails and ground. Specification 836,434 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US836435XA | 1956-09-04 | 1956-09-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB836435A true GB836435A (en) | 1960-06-01 |
Family
ID=22179734
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB26527/57A Expired GB836435A (en) | 1956-09-04 | 1957-08-22 | Protection of electronic apparatus from current and voltage surges |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB836435A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2161659A (en) * | 1984-07-10 | 1986-01-15 | Oels Wolf Dieter | Apparatus for protecting against overvoltages having a coarse protection and a fine protection means |
-
1957
- 1957-08-22 GB GB26527/57A patent/GB836435A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2161659A (en) * | 1984-07-10 | 1986-01-15 | Oels Wolf Dieter | Apparatus for protecting against overvoltages having a coarse protection and a fine protection means |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES8308156A1 (en) | Integrated circuit protection device | |
GB1436625A (en) | Overvoltage protective circuit | |
US4061928A (en) | Circuit arrangement for the protection of inputs of integrated MOS circuits | |
US20230188136A1 (en) | Common-mode transient suppression protection circuit for digital isolator | |
CN103955251B (en) | High-voltage linear voltage regulator | |
GB836435A (en) | Protection of electronic apparatus from current and voltage surges | |
US3015781A (en) | Device for the protection of electrical apparatus against excess voltage | |
ES8403245A1 (en) | Protection circuit for integrated circuit devices | |
GB928923A (en) | Circuit arrangement for preventing sawtooth oscillations in capacitive potential transformers | |
GB866031A (en) | Improvements in or relating to protection devices for electric networks | |
US3092757A (en) | Circuit means for preventing spike or surges at the output of a power supply | |
GB857313A (en) | Apparatus utilising transistors for detecting a change in the sign of the slope of an electrical waveform | |
GB1127879A (en) | Surge suppressor for protecting a high voltage dc power circuit | |
US2014179A (en) | Electrical discharge registering system | |
US3107307A (en) | Combined transistor amplifier and switching circuit | |
US4489245A (en) | D.C. Voltage bias circuit in an integrated circuit | |
JPS5289477A (en) | Input protecting circuit | |
US20240039769A1 (en) | Systems and methods for improving common mode transient immunity in silicon digital isolators using capacitive barrier for galvanic isolation | |
GB556694A (en) | Improvements in protective apparatus for alternating current circuits | |
KR101978063B1 (en) | A Sensing Signal Noise Filter Strong-ARM Amplifier | |
Bicleanu et al. | Approach on Electrostatic Discharge protection structures based on Transient Voltage Suppressor diodes | |
GB808331A (en) | Transistor driver circuit | |
SU177978A1 (en) | automatic compensation of stray currents | |
GB930872A (en) | An electrical circuit using a tunnel diode | |
GB820615A (en) | Improvements in and relating to rectifier circuits |