GB1187689A - Improvements in or relating to Electrical Switching Devices - Google Patents

Improvements in or relating to Electrical Switching Devices

Info

Publication number
GB1187689A
GB1187689A GB4981068A GB4981068A GB1187689A GB 1187689 A GB1187689 A GB 1187689A GB 4981068 A GB4981068 A GB 4981068A GB 4981068 A GB4981068 A GB 4981068A GB 1187689 A GB1187689 A GB 1187689A
Authority
GB
United Kingdom
Prior art keywords
thyristor
oct
energized
switching circuit
supply
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
Application number
GB4981068A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB1187689A publication Critical patent/GB1187689A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region

Abstract

1,187,689. Triggering controlled rectifiers. ROBERT BOSCH G.m.b.H. 21 Oct., 1968 [21 Oct., 1967], No. 49810/68. Addition to 1,186,013. Heading H2F. [Also in Division G1] A proximity switching circuit 22 as described in the parent Specification is arranged to trigger an A.C. energized thyristor 14 controlling a load 15 such as a relay, servomotor or valve. The proximity switch comprises an inductively coupled transistor oscillator 24 feeding a THRESHOLD AMPLIFIER 27, which provides additional POSITIVE FEEDBACK through capacitor 52 causing a rapid oscillator build up at each half cycle of supply voltage (from bridge rectifier 17), and also "fires" transistor 28 to generate a thyristor triggering pulse in transformer 56. Modifications.-The switching circuit 22 may be energized with rectangular pulses by chopping the rectified supply with a Zener diode (62), Figs. 3, 4 (not shown). The load current of thyristor 14 may be controlled by an R.C. phase shifter (67), (69), in the switch supply circuit Fig. 5 (not shown).
GB4981068A 1966-09-17 1968-10-21 Improvements in or relating to Electrical Switching Devices Expired GB1187689A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEB0088958 1966-09-17
DE1537040 1967-10-21

Publications (1)

Publication Number Publication Date
GB1187689A true GB1187689A (en) 1970-04-15

Family

ID=25752761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4981068A Expired GB1187689A (en) 1966-09-17 1968-10-21 Improvements in or relating to Electrical Switching Devices

Country Status (3)

Country Link
AT (1) AT307814B (en)
FR (1) FR95590E (en)
GB (1) GB1187689A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159008A (en) * 1984-05-15 1985-11-20 Hayashibara Ken Phase-regulated switching circuit
GB2178253A (en) * 1985-06-05 1987-02-04 Hayashibara Ken Surge-current preventing circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159008A (en) * 1984-05-15 1985-11-20 Hayashibara Ken Phase-regulated switching circuit
GB2178253A (en) * 1985-06-05 1987-02-04 Hayashibara Ken Surge-current preventing circuit
US4710698A (en) * 1985-06-05 1987-12-01 Ken Hayashibara Phase-controlled automatic switching circuit
GB2178253B (en) * 1985-06-05 1989-07-19 Hayashibara Ken Phase-controlled automatic switching circuit

Also Published As

Publication number Publication date
FR95590E (en) 1971-03-26
AT307814B (en) 1973-06-12

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees