GB357439A - Improvements in and relating to electric time switches particularly for x-ray apparatus - Google Patents

Improvements in and relating to electric time switches particularly for x-ray apparatus

Info

Publication number
GB357439A
GB357439A GB37547/30A GB3754730A GB357439A GB 357439 A GB357439 A GB 357439A GB 37547/30 A GB37547/30 A GB 37547/30A GB 3754730 A GB3754730 A GB 3754730A GB 357439 A GB357439 A GB 357439A
Authority
GB
United Kingdom
Prior art keywords
shaft
carrier
ray apparatus
contacts
drum
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
GB37547/30A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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
Application filed by British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB357439A publication Critical patent/GB357439A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/12—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation
    • H01H43/121—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation using a drum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/10—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
    • H01H43/12—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H01H7/16—Devices for ensuring operation of the switch at a predetermined point in the ac cycle

Abstract

357,439. Rontgen ray apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Kearsley, W. K. ; 1606, Randolph Road, Schenectady, New York, U.S.A.) Dec. 12, 1930, No. 37547. Convention date, June 23. [Class 98 (i).] A time switch for controlling the period of energization of X-ray apparatus comprises an electric motor rotating a contact drum adapted to co-operate with contacts spaced apart lengthwise of and adjacent to the drum, means driven by the motor for moving the contacts lengthwise of the contact drum and means for rendering the last means active for moving the contacts on to the surface of the drum. A synchronous electric motor 10, driven from alternating current mains 10<1>, drives a shaft 11 through variable speed gearing 18. The shaft 11 carries a contact cylinder having a central conducting portion 16 and insulating ends 14, 15, the dividing line between the insulating and conducting parts being a stepped spiral of the same pitch as a screw 17 also on the shaft 11. A carrier 27 can slide but not rotate on a shaft 21 to which is attached a lever 24, having at one end an armature 23. On energizing an electromagnet 22 by means of a push-button 26, the armature 23 is attracted and the shaft 21 is rotated. This causes the end of a lever 28 on the carrier 27 to engage the screw thread 17 and the carrier slides to the right. At the same time, contacts on arms 31, 32 engage the contact cylinder and their distance apart determines the time during which they are both on the conducting segment 16. In this position the X-ray apparatus is energized. The period of actuation is varied by movement of the arm 32 relative to a rack 39 which is provided with a scale 40, and also by means of the variable speed gearing 18. A coupling 13 is provided in the shaft 11 so as to alter the phase at which the break occurs and is adjusted to give a break at the zero of the alternating current cycle. A spring 35 returns the carrier 27 to its starting position when the magnet 22 is de-energized, and a latch 44 is provided to hold the carrier 33 in the event of its passing the end of the screw 17 with the magnet 22 still energized.
GB37547/30A 1930-06-23 1930-12-12 Improvements in and relating to electric time switches particularly for x-ray apparatus Expired GB357439A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US463207A US1820808A (en) 1930-06-23 1930-06-23 Time switch

Publications (1)

Publication Number Publication Date
GB357439A true GB357439A (en) 1931-09-24

Family

ID=23839275

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37547/30A Expired GB357439A (en) 1930-06-23 1930-12-12 Improvements in and relating to electric time switches particularly for x-ray apparatus

Country Status (2)

Country Link
US (1) US1820808A (en)
GB (1) GB357439A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619563A (en) * 1945-08-07 1952-11-25 Kesselring Fritz Electromagnetic control device
US2654063A (en) * 1948-06-05 1953-09-29 Arthur M Cohen Synchronously operated regulator
US2510690A (en) * 1948-07-19 1950-06-06 Forsberg Axel Gunnar Switch resetting mechanism
NL82992C (en) * 1951-03-17 1900-01-01
US2963596A (en) * 1960-01-19 1960-12-06 Liebel Flarsheim Co Electronic X-ray timer
FR2467432A1 (en) * 1979-10-09 1981-04-17 Scholtes Ets Eugen Control device for cooking appts. - has conductive drum driven by motor providing variable burner cycle dependent on axial position of contact

Also Published As

Publication number Publication date
US1820808A (en) 1931-08-25

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