GB230779A - Improvements in or relating to impulse transmitters for use in telephone or like systems - Google Patents

Improvements in or relating to impulse transmitters for use in telephone or like systems

Info

Publication number
GB230779A
GB230779A GB21435/24A GB2143524A GB230779A GB 230779 A GB230779 A GB 230779A GB 21435/24 A GB21435/24 A GB 21435/24A GB 2143524 A GB2143524 A GB 2143524A GB 230779 A GB230779 A GB 230779A
Authority
GB
United Kingdom
Prior art keywords
impulse
springs
pin
cam
engagement
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
GB21435/24A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing 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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Publication of GB230779A publication Critical patent/GB230779A/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

230,779. Automatic Telephone Manufacturing Co., Ltd., (Assignees of Blessing, J. G.). March 15, 1924, [Convention date]. Impulse-transmitters.-In an impulse-transmitter of the dial type, the shaft 3 of the fingerplate carries an arm 4 which normally holds the impulse springs 8, 9 out of range of the impulse cam 17 by the engagement of a conducting pin 6 between downwardly extending ears on the springs, while a second arm 5 engages a stop 18 on the impulse cam. The impulse cam is in the form of a cup with parts of the wall cut away, and is adapted to perform an idle movement corresponding to one impulse after the impulse springs are rendered ineffective by the return of the pin 6. Shunt springs 10, 11, 12 are normally held out of engagement by a pin 15 which bears against impulse spring 9. Specification 135,416 is referred to.
GB21435/24A 1924-03-15 1924-09-10 Improvements in or relating to impulse transmitters for use in telephone or like systems Expired GB230779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US230779XA 1924-03-15 1924-03-15

Publications (1)

Publication Number Publication Date
GB230779A true GB230779A (en) 1925-12-10

Family

ID=21812999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21435/24A Expired GB230779A (en) 1924-03-15 1924-09-10 Improvements in or relating to impulse transmitters for use in telephone or like systems

Country Status (1)

Country Link
GB (1) GB230779A (en)

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