GB1293505A - Temperature sensing apparatus - Google Patents

Temperature sensing apparatus

Info

Publication number
GB1293505A
GB1293505A GB24945/71D GB2494571D GB1293505A GB 1293505 A GB1293505 A GB 1293505A GB 24945/71 D GB24945/71 D GB 24945/71D GB 2494571 D GB2494571 D GB 2494571D GB 1293505 A GB1293505 A GB 1293505A
Authority
GB
United Kingdom
Prior art keywords
load
integrator
ray tube
decay
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
Application number
GB24945/71D
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.)
CGR Medical Corp
Original Assignee
CGR Medical Corp
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 CGR Medical Corp filed Critical CGR Medical Corp
Publication of GB1293505A publication Critical patent/GB1293505A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/36—Temperature of anode; Brightness of image power
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K17/00—Measuring quantity of heat
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images
    • H02H6/005—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images using digital thermal images

Abstract

1293505 Measuring electrical energy CGR MEDICAL CORP 19 April 1971 [15 April 1970] 24945/71 Heading G1U [Also in Division H2] Apparatus for monitoring the temperature of a load supplied with electrical energy comprises a generator 30 providing pulses whose frequency is proportional to the load current, a modulator 40 which regulates the amplitude of the pulses in accordance with the load voltage, an integrator 50 for integrating the modulated pulses, and a discharge path, e.g. R, which allows the integrator output to decay at a rate corresponding to the cooling rate of the load. Two discharge paths may be included, one providing for an exponential voltage decay and comprising a resistor R across the integrator capacitor 51, and the other, said to provide a linear decay, comprising a resistor between the input side of capacitor 51 and the h.t. supply. The integrator output is indicated directly on a meter 90 and is also applied to a Schmitt trigger 70 to energize a circuit breaker 95 and a triac 80 driving an alarm indicator 88 when the integrator output, and hence load temperature, become too large. The load may be the anode of an X-ray tube, a signal proportional to the anode current being derived by a shunt 5 supplied via a bridge rectifier (4A, Fig. 1, not shown) in the secondary circuit of the X-ray tube. supply transformer (3). A diode (54) across the integrator capacitor 51 prevents spurious voltages building up when the X-ray tube is initially energized.
GB24945/71D 1970-04-15 1971-04-19 Temperature sensing apparatus Expired GB1293505A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2866570A 1970-04-15 1970-04-15

Publications (1)

Publication Number Publication Date
GB1293505A true GB1293505A (en) 1972-10-18

Family

ID=21844755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24945/71D Expired GB1293505A (en) 1970-04-15 1971-04-19 Temperature sensing apparatus

Country Status (5)

Country Link
US (1) US3634871A (en)
CA (1) CA934881A (en)
DE (1) DE2118124A1 (en)
FR (1) FR2089679A5 (en)
GB (1) GB1293505A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133942A (en) * 1983-01-20 1984-08-01 Sharp Kk Protection for a photocopier corona device
GB2140633A (en) * 1983-04-29 1984-11-28 Plessey Co Plc Load tripping circuits

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916263A (en) * 1971-12-13 1975-10-28 Honeywell Inf Systems Memory driver circuit with thermal protection
CH534444A (en) * 1972-05-23 1973-02-28 Sprecher & Schuh Ag Electronic motor protection relay with current-dependent tripping
US3955119A (en) * 1973-01-29 1976-05-04 Varian Associates Apparatus for predicting incipient failure of an X-ray generator tube
US3838285A (en) * 1973-05-10 1974-09-24 Cgr Medical Corp X-ray tube anode protective circuit
DE2328322A1 (en) * 1973-06-04 1974-12-19 Siemens Ag X-RAY DIAGNOSTIC APPARATUS FOR USE WITH AN AUXILIARY DEVICE THAT REQUIRES A SPECIFIC RECORDING TIME
DE2329414A1 (en) * 1973-06-08 1975-01-02 Siemens Ag X-RAY DIAGNOSTIC APPARATUS FOR MAKING X-RAY RECORDS WITH A TIMER TO DETERMINE THE RECORDING DURATION
US3962607A (en) * 1974-06-05 1976-06-08 Dynaco Inc. Loudspeaker protective system
US3961173A (en) * 1974-11-20 1976-06-01 Varian Associates Heat unit integrator for X-ray tubes
US4330809A (en) * 1979-12-31 1982-05-18 Crown International, Inc. Thermal protection circuit for the die of a transistor
FR2530019A1 (en) * 1982-07-09 1984-01-13 Thomson Csf Overheating protection system for X=ray tube rotary anode
DE3347185A1 (en) * 1983-12-27 1985-07-04 Siemens AG, 1000 Berlin und 8000 München ARRANGEMENT FOR INFLUENCING A SWITCHGEAR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2583095A (en) * 1946-07-20 1952-01-22 Picker X Ray Corp Waite Mfg X-ray tube safety device
US2840718A (en) * 1954-03-26 1958-06-24 Westinghouse Electric Corp X-ray apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2133942A (en) * 1983-01-20 1984-08-01 Sharp Kk Protection for a photocopier corona device
GB2140633A (en) * 1983-04-29 1984-11-28 Plessey Co Plc Load tripping circuits

Also Published As

Publication number Publication date
DE2118124A1 (en) 1971-11-04
FR2089679A5 (en) 1972-01-07
US3634871A (en) 1972-01-11
CA934881A (en) 1973-10-02

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees