GB891893A - Improvements in or relating to dial switches for use in automatic telephone or like switching systems - Google Patents

Improvements in or relating to dial switches for use in automatic telephone or like switching systems

Info

Publication number
GB891893A
GB891893A GB2029859A GB2029859A GB891893A GB 891893 A GB891893 A GB 891893A GB 2029859 A GB2029859 A GB 2029859A GB 2029859 A GB2029859 A GB 2029859A GB 891893 A GB891893 A GB 891893A
Authority
GB
United Kingdom
Prior art keywords
spring
tongues
automatic telephone
relating
shunts
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
GB2029859A
Inventor
Keith Higham
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 and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB2029859A priority Critical patent/GB891893A/en
Publication of GB891893A publication Critical patent/GB891893A/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

891,893. Impulse transmitters. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. March 29, 1960 [June 13, 1959], No. 20298/59. Class 40 (4). Tongues 14, 15 normally lie between projections 28 on off-normal spring sets A and B of an impulse transmitter, the tongues moving out from between the projections allowing the spring sets to operate when the transmitter is moved off-normal. The tongues 14, 15 depend from an arm 12 on a nylon bush 11 which is self-threaded on to the end 10 of the finger plate shaft. A spring 16 locks the bush. Each blade of the spring sets is as shown in Fig. 3 with the projection 28 forming part of a corrugation across the blade to provide a wedge entry for the tongues and to give stiffness. As the tongue 15 moves with a larger radius than tongue 14, spring set B opens and closes before spring set A. Set A shunts the bell and set B shunts the transmission circuit. Specification 891,892 is referred to.
GB2029859A 1959-06-13 1959-06-13 Improvements in or relating to dial switches for use in automatic telephone or like switching systems Expired GB891893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2029859A GB891893A (en) 1959-06-13 1959-06-13 Improvements in or relating to dial switches for use in automatic telephone or like switching systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2029859A GB891893A (en) 1959-06-13 1959-06-13 Improvements in or relating to dial switches for use in automatic telephone or like switching systems

Publications (1)

Publication Number Publication Date
GB891893A true GB891893A (en) 1962-03-21

Family

ID=10143659

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2029859A Expired GB891893A (en) 1959-06-13 1959-06-13 Improvements in or relating to dial switches for use in automatic telephone or like switching systems

Country Status (1)

Country Link
GB (1) GB891893A (en)

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