GB414889A - Improvements in or relating to circuit arrangements for automatically limiting the duration of an electrical process - Google Patents

Improvements in or relating to circuit arrangements for automatically limiting the duration of an electrical process

Info

Publication number
GB414889A
GB414889A GB1906933A GB1906933A GB414889A GB 414889 A GB414889 A GB 414889A GB 1906933 A GB1906933 A GB 1906933A GB 1906933 A GB1906933 A GB 1906933A GB 414889 A GB414889 A GB 414889A
Authority
GB
United Kingdom
Prior art keywords
tube
condenser
circuit
charging
relay
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
GB1906933A
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.)
MUELLER C H F AG
Original Assignee
MUELLER C H F AG
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
Priority to DE414889X priority Critical
Application filed by MUELLER C H F AG filed Critical MUELLER C H F AG
Publication of GB414889A publication Critical patent/GB414889A/en
Application status is Expired legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/26Measuring, controlling, protecting
    • H05G1/30Controlling
    • H05G1/38Exposure time
    • H05G1/42Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K17/00Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28Modifications for introducing a time delay before switching
    • H03K17/288Modifications for introducing a time delay before switching in tube switches
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05GX-RAY TECHNIQUE
    • H05G1/00X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08Electrical details
    • H05G1/26Measuring, controlling, protecting
    • H05G1/30Controlling
    • H05G1/38Exposure time

Abstract

414,889. Switching systems for consuming devices. MULLER AKT.-GES., C. H. F., 24, R÷ntgenstrasse, Hamburg, Germany. July 5, 1933, Nos. 19069, 19070, and 19071. Convention dates, July 5, 1932, April 1, 1933, and April 7, 1933. [Class 38 (iv).] The duration of an electrical process, e.g. the energization of an X-ray tube, is timed by the period of charging of a condenser the charging of which controls a three electrode discharge tube the anode circuit of which includes a relay 7 controlling the electrical process to be timed. The discharge tube 1 is supplied with A.C. and the condenser 5 is charged, in one position of a switch 15 from the A.C. supply through a rectifier 9 and resistance 6, a second position of the switch 15 being arranged to open the charging circuit and short circuit the condenser 5. The grid potential of the tube 1 may be supplied by part of the transformer winding supplying the tube and by the drop across the resistance 6 which is adjustable. In this case the relay 7 is a closed circuit relay whose winding is normally energized by the current of the tube 1. Movement of the switch 15 to the position II commences the charging operation which produces a large but decreasing drop across the resistance 6 so as initially to block the valve 1 and commence the electrical process, but after a predetermined period determined by the adjustment of the resistance 6, to open the valve 1 once more and stop the process. Alternatively, the potential across the condenser 5 may be applied to control the grid voltage of the tube 1 the arrangement being such that the tube 1 is nonconducting when the condenser 5 is short circuited but is opened when the charging commences and blocked when the charging is completed. In this case the relay 7 is an open circuit relay. In a modification of the latter case the switch 15 has a third position in which the grid 3 of the valve 1 is connected to a positive bias tap on the transformer 13 supplying the tube so that the tube 1 can be made conducting at will for the purpose of energizing an X-ray tube for fluoroscopy. The charging circuit of the condenser is connected across tapping points on the winding supplying the tube 1 or to a potentiometer connected across these tappings so that the phase of the charging current coincides with that of the tube voltage. In a further modification the tube 1 is rendered positively nonconducting when the condenser is short-circuited by opening its anode to cathode circuit in this position of the switch 15. In an alternative arrangement, Fig. 5, the relay 7 has additional contacts 23, 24 which, in the energized position close its connection in the anode circuit of the valve 1 and open a short circuit across the condenser 5. Its anode circuit contacts are paralleled by a hand switch 25 by which the operation is initiated, this switch being arranged to remain closed at least until the holding contacts 24 of the relay 7 are closed.
GB1906933A 1932-07-05 1933-07-05 Improvements in or relating to circuit arrangements for automatically limiting the duration of an electrical process Expired GB414889A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE414889X 1932-07-05

Publications (1)

Publication Number Publication Date
GB414889A true GB414889A (en) 1934-08-16

Family

ID=6448401

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1798733A Expired GB407583A (en) 1932-07-05 1933-06-23 Improvements in and relating to time switching devices
GB1906933A Expired GB414889A (en) 1932-07-05 1933-07-05 Improvements in or relating to circuit arrangements for automatically limiting the duration of an electrical process

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB1798733A Expired GB407583A (en) 1932-07-05 1933-06-23 Improvements in and relating to time switching devices

Country Status (4)

Country Link
US (2) US1980146A (en)
FR (1) FR758018A (en)
GB (2) GB407583A (en)
NL (2) NL37240C (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2420919A (en) * 1942-07-10 1947-05-20 Weltronic Co Timing control system
US2537862A (en) * 1943-07-09 1951-01-09 Bell Telephone Labor Inc High-voltage pulse generator
US2459784A (en) * 1943-08-10 1949-01-25 John W Alderson Millivolt control unit
US2431284A (en) * 1943-11-20 1947-11-18 Westinghouse Electric Corp Pulsation timing system
US2423478A (en) * 1944-08-25 1947-07-08 Honeywell Regulator Co Condition control apparatus
US2560386A (en) * 1944-09-02 1951-07-10 Mcgraw Electric Co Automatic electric toaster
US2431195A (en) * 1944-10-09 1947-11-18 Mcgraw Electric Co Automatic electric toaster
US2451508A (en) * 1944-11-22 1948-10-19 Mcgraw Electric Co Automatic electric toaster
US2560387A (en) * 1944-11-22 1951-07-10 Mcgraw Electric Co Automatic electric toaster
US2471834A (en) * 1944-12-09 1949-05-31 Gen Electric Electronic relay
US2420188A (en) * 1945-01-06 1947-05-06 Mcgraw Electric Co Automatic electric toaster
US2560388A (en) * 1945-01-06 1951-07-10 Mcgraw Electric Co Automatic electric toaster
US2415963A (en) * 1945-01-31 1947-02-18 Mcgraw Electric Co Automatic electric toaster
US2560389A (en) * 1945-03-02 1951-07-10 Mcgraw Electric Co Automatic electric toaster
US2542998A (en) * 1945-07-16 1951-02-27 Int Standard Electric Corp Matched potential control system
BE482082A (en) * 1945-07-30 1900-01-01
US2479274A (en) * 1946-01-04 1949-08-16 Gage B Ellis Timing circuit
US2448371A (en) * 1946-04-04 1948-08-31 Gen Electric Circuit making and breaking in response to power failure
US2461266A (en) * 1946-05-31 1949-02-08 Godwin R F Gay Timing device
US2494520A (en) * 1946-10-14 1950-01-10 Bendix Aviat Corp Electronic timer
US2638731A (en) * 1948-05-01 1953-05-19 Deering Milliken Res Trust Control system
US2663003A (en) * 1949-04-16 1953-12-15 Sylvania Electric Prod Adjustable potentiometer
US2668909A (en) * 1950-04-10 1954-02-09 Exposure timer for x-ray apparatus
US2657308A (en) * 1950-07-29 1953-10-27 Standard Telephones Cables Ltd Signal receiver circuit
US2761099A (en) * 1951-02-05 1956-08-28 Will F Wilson Intermittently operated motor for camera
US2840204A (en) * 1954-01-14 1958-06-24 Burroughs Corp Time delay device
US2779336A (en) * 1954-07-13 1957-01-29 Horace E Abbe Electro-therapeutic apparatus
US2898476A (en) * 1955-07-05 1959-08-04 Honeywell Regulator Co Transistor control apparatus
US2913056A (en) * 1956-10-01 1959-11-17 United Aircraft Corp Propeller control anticipator
US2941127A (en) * 1957-05-15 1960-06-14 Cutler Hammer Inc Electronic timing system
US2942151A (en) * 1957-08-16 1960-06-21 Westinghouse Electric Corp Electric discharge apparatus
US2945185A (en) * 1957-11-19 1960-07-12 Western Electric Co Pulsing system
US3164723A (en) * 1958-03-11 1965-01-05 Philips Corp Voltage regulating circuit for x-ray tubes
NL274963A (en) * 1961-02-20

Also Published As

Publication number Publication date
GB407583A (en) 1934-03-22
US2061011A (en) 1936-11-17
NL39803C (en)
NL37240C (en)
FR758018A (en) 1934-01-08
US1980146A (en) 1934-11-06

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