GB371084A - Device for maintaining the load current constant in an electric circuit - Google Patents

Device for maintaining the load current constant in an electric circuit

Info

Publication number
GB371084A
GB371084A GB4585/31A GB458531A GB371084A GB 371084 A GB371084 A GB 371084A GB 4585/31 A GB4585/31 A GB 4585/31A GB 458531 A GB458531 A GB 458531A GB 371084 A GB371084 A GB 371084A
Authority
GB
United Kingdom
Prior art keywords
variator
constant resistance
bulb
maintaining
load current
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
GB4585/31A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB371084A publication Critical patent/GB371084A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Thermistors And Varistors (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

371,084. Automatic regulation. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 13D, Emmasingel, Eindhoven, Holland. Feb. 13, 1931, No. 4585. Convention date, March 28, 1930. [Class 38 (iv).] A load current is maintained on the load 3, 4, Fig. I, being put into circuit as well as during operation by connecting a constant resistance 7 and a variator 6 in series and short-circuiting the constant resistance by means of a switch 8 when the variator 6 has reached the required temperature, the constant resistance 7 maintaining the current below a minimum admissible value during the period in which the variator is heating. The switch 8 may be closed by means of a time relay or a bimetallic strip. As shown in Fig. 4 the bimetallic strip 22, variator wire 23, and constant resistance 24 mav be mounted in one glass bulb, which is exhausted or filled with a gas such as nitrogen, hydrogen, or rare gas. Alternatively two of the elements may be arranged in one bulb and the third in a second bulb. The invention is applicable to mains supply units for radio receiving sets, amplifiers, &c.
GB4585/31A 1930-03-28 1931-02-13 Device for maintaining the load current constant in an electric circuit Expired GB371084A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL371084X 1930-03-28

Publications (1)

Publication Number Publication Date
GB371084A true GB371084A (en) 1932-04-21

Family

ID=19785547

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4585/31A Expired GB371084A (en) 1930-03-28 1931-02-13 Device for maintaining the load current constant in an electric circuit

Country Status (4)

Country Link
BE (1) BE377792A (en)
DE (1) DE676906C (en)
FR (1) FR712647A (en)
GB (1) GB371084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765434A (en) * 1950-10-16 1956-10-02 Intavex Inc Speed control for direct current electric motors
US3017564A (en) * 1954-08-12 1962-01-16 Barney Walter Protective circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765434A (en) * 1950-10-16 1956-10-02 Intavex Inc Speed control for direct current electric motors
US3017564A (en) * 1954-08-12 1962-01-16 Barney Walter Protective circuit

Also Published As

Publication number Publication date
FR712647A (en) 1931-10-06
BE377792A (en)
DE676906C (en) 1939-06-15

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