GB1030914A - Improvements relating to telephone dial switch mechanisms - Google Patents

Improvements relating to telephone dial switch mechanisms

Info

Publication number
GB1030914A
GB1030914A GB2225164A GB2225164A GB1030914A GB 1030914 A GB1030914 A GB 1030914A GB 2225164 A GB2225164 A GB 2225164A GB 2225164 A GB2225164 A GB 2225164A GB 1030914 A GB1030914 A GB 1030914A
Authority
GB
United Kingdom
Prior art keywords
dial
magnet
contacts
closed
rotating
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
GB2225164A
Inventor
Ronald Ernest Charles Brown
Leslie Charles Ryder
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB2225164A priority Critical patent/GB1030914A/en
Publication of GB1030914A publication Critical patent/GB1030914A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)

Abstract

1,030,914. Telephone dials. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. March 2, 1965 [May 29, 1964], No. 22251/64. Heading H4K. The impulsing contacts of a telephone dial mechanism are provided by magnetizable sealed reed contacter which are caused to open and close during the return motion of the dial from a selected digit position by two rotating permanent magnets as each passes in front of the reeds. Each rotating magnet nullifies the effect of a permanent magnet which otherwise holds the contacts closed. The usual lost motion period is provided by another magnet mounted on a disc rotated through the same angle as the dial so that during the last stage of the dial's return movement this magnet comes near enough to the reed contacts to hold them closed irrespective of the two rotating magnets. Two further sealed reed units form the off-normal contacts of the dial mechanism and are closed as a second magnet mounted on the above disc moves away at the beginning of dialling. The magnetic axes of the two magnets mounted on the disc are mutually perpendicular to avoid interference in the magnetic actions.
GB2225164A 1964-05-29 1964-05-29 Improvements relating to telephone dial switch mechanisms Expired GB1030914A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2225164A GB1030914A (en) 1964-05-29 1964-05-29 Improvements relating to telephone dial switch mechanisms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2225164A GB1030914A (en) 1964-05-29 1964-05-29 Improvements relating to telephone dial switch mechanisms

Publications (1)

Publication Number Publication Date
GB1030914A true GB1030914A (en) 1966-05-25

Family

ID=10176341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2225164A Expired GB1030914A (en) 1964-05-29 1964-05-29 Improvements relating to telephone dial switch mechanisms

Country Status (1)

Country Link
GB (1) GB1030914A (en)

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