GB547304A - Electric circuit control - Google Patents

Electric circuit control

Info

Publication number
GB547304A
GB547304A GB8457/41A GB845741A GB547304A GB 547304 A GB547304 A GB 547304A GB 8457/41 A GB8457/41 A GB 8457/41A GB 845741 A GB845741 A GB 845741A GB 547304 A GB547304 A GB 547304A
Authority
GB
United Kingdom
Prior art keywords
load
voltage
july
variations
series
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
GB8457/41A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB547304A publication Critical patent/GB547304A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics

Abstract

547,304. Automatic control systems. STANDARD TELEPHONES & CABLES, Ltd. July 4, 1941, No. 8457. Convention date, July 11, 1940. [Class 38 (iv)] [Also in Group XXXIX] A constant voltage is obtained across a load 5 irrespective of variations of the voltage of a source 3 by the provision of a shunt circuit comprising in series two thermistors both of which have negative temperature coefficients of resistance and one of which does not alter its condition in response to current changes. A third thermistor 8 also having a negative temperature coefficient and being unaffected by variations in the current through it is shunted by a resistance 9 connected in series with the load to make the voltage across the load independent of temperature changes. The load may be the input to a pelot channel for regulating repeaters in a multiplex carrier system.
GB8457/41A 1940-07-11 1941-07-04 Electric circuit control Expired GB547304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US344894A US2332073A (en) 1940-07-11 1940-07-11 Electric circuit control

Publications (1)

Publication Number Publication Date
GB547304A true GB547304A (en) 1942-08-21

Family

ID=23352531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8457/41A Expired GB547304A (en) 1940-07-11 1941-07-04 Electric circuit control

Country Status (3)

Country Link
US (1) US2332073A (en)
DE (1) DE889030C (en)
GB (1) GB547304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747158A (en) * 1950-05-24 1956-05-22 Bel Clarence J Le Temperature compensated circuit having non-linear resistor

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2423107A (en) * 1942-06-02 1947-07-01 Standard Telephones Cables Ltd Thermistor controlled relay circuits
US2465683A (en) * 1945-07-09 1949-03-29 Rudolph N Griesheimer Radio-frequency power measuring bridge
US2533287A (en) * 1946-07-22 1950-12-12 Univ Minnesota Thermistor system
US2830252A (en) * 1954-08-02 1958-04-08 Leeds & Northrup Co Arrangements for providing standardized voltage or current
US2932972A (en) * 1955-12-29 1960-04-19 Bendix Aviat Corp Pressure-responsive electrical transducer incorporating means for cancelling effects of vibration, gravity and acceleration stresses
DE1144802B (en) * 1956-11-28 1963-03-07 Svenska Ackumulator Ab Device for keeping the voltage constant in an electrical circuit
US2949575A (en) * 1957-04-29 1960-08-16 Hycon Mfg Company Temperature compensated bolometer bias supply
US3241026A (en) * 1961-12-08 1966-03-15 Philips Corp Load protective device including positive temperature coefficient resistance

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE653990C (en) * 1929-08-20 1937-12-07 Stabilovolt G M B H Device for maintaining a voltage difference between two points

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747158A (en) * 1950-05-24 1956-05-22 Bel Clarence J Le Temperature compensated circuit having non-linear resistor

Also Published As

Publication number Publication date
US2332073A (en) 1943-10-19
DE889030C (en) 1953-09-07

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