GB447080A - Improvements relating to electrically driven clocks - Google Patents

Improvements relating to electrically driven clocks

Info

Publication number
GB447080A
GB447080A GB35543/34A GB3554334A GB447080A GB 447080 A GB447080 A GB 447080A GB 35543/34 A GB35543/34 A GB 35543/34A GB 3554334 A GB3554334 A GB 3554334A GB 447080 A GB447080 A GB 447080A
Authority
GB
United Kingdom
Prior art keywords
current
motor
alternating current
windings
winding
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
GB35543/34A
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.)
S Smith and Sons Ltd
S Smith and Sons Motor Accesories Ltd
Original Assignee
S Smith and Sons Ltd
S Smith and Sons Motor Accesories Ltd
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 FR754790D priority Critical patent/FR754790A/en
Application filed by S Smith and Sons Ltd, S Smith and Sons Motor Accesories Ltd filed Critical S Smith and Sons Ltd
Priority to GB35543/34A priority patent/GB447080A/en
Priority to FR46821D priority patent/FR46821E/en
Publication of GB447080A publication Critical patent/GB447080A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C15/00—Clocks driven by synchronous motors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Abstract

447,080. Electricity supply; motors. SMITH & SONS (MOTOR ACCESSORIES), Ltd., S. BAXTER, F., and WORSTER, N., Edgware Road, Cricklewood, London. Dec. 11, 1934, No. 35543. Addition to 395,695, [Group XVIII]. [Classes 35 and 38 (iv)] Substituting sources in series.-In the arrangement described in the parent Specification for supplying a clock motor with intermittent direct current of suitable frequency on failure of the ordinary alternating current supply means are provided for simulating the effect of alternating current more closelv than does an intermittent current. For this purpose the motor, besides the alternating- current winding, is provided with two windings one of which carries the intermittent current and the other a direct current opposed to the intermittent current, the two fields being so proportioned that the resulting field resembles that due to the alternating current. The Figure shows a circuit for producing this effect. Alternating current is supplied by a transformer g to the motor winding d and through a rectifier m to an electromagnet l. A battery u supplies current directly to a motor winding c and, through a vibrating contact r, the period of which is controlled by a spring to be equal to that of the alternating current, to a motor winding c. The windings band c are normally cut off by a switch controlled by the electromagnet 1, but on failure of the alternating current the switch closes and puts the windings band c in circuit. The windings b, c and d may act on the same motor or the windings band c may act on one rotor and the winding d on a second rotor on the same shaft, or two separate motors geared together may be employed.
GB35543/34A 1933-04-26 1934-12-11 Improvements relating to electrically driven clocks Expired GB447080A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR754790D FR754790A (en) 1933-04-26 1933-04-26 Improvements to electrically controlled clocks
GB35543/34A GB447080A (en) 1934-12-11 1934-12-11 Improvements relating to electrically driven clocks
FR46821D FR46821E (en) 1934-12-11 1935-12-06 IMPROVEMENTS TO ELECTRICALLY CONTROLLED CLOCKS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB35543/34A GB447080A (en) 1934-12-11 1934-12-11 Improvements relating to electrically driven clocks
FR46821T 1935-12-06

Publications (1)

Publication Number Publication Date
GB447080A true GB447080A (en) 1936-05-12

Family

ID=40134755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35543/34A Expired GB447080A (en) 1933-04-26 1934-12-11 Improvements relating to electrically driven clocks

Country Status (2)

Country Link
FR (2) FR754790A (en)
GB (1) GB447080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511698A (en) * 1946-05-31 1950-06-13 Bendix Aviat Corp Electrical transmission system for speedometers and the like
US7672480B2 (en) * 2003-10-06 2010-03-02 Mbda France Method for photographing on board of a flying rotating body and system for carrying out said method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511698A (en) * 1946-05-31 1950-06-13 Bendix Aviat Corp Electrical transmission system for speedometers and the like
US7672480B2 (en) * 2003-10-06 2010-03-02 Mbda France Method for photographing on board of a flying rotating body and system for carrying out said method

Also Published As

Publication number Publication date
FR46821E (en) 1936-09-12
FR754790A (en) 1933-11-14

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