GB501353A - Improvements in or relating to impulse sending arrangements for use in telephone or like systems - Google Patents

Improvements in or relating to impulse sending arrangements for use in telephone or like systems

Info

Publication number
GB501353A
GB501353A GB23349/37A GB2334937A GB501353A GB 501353 A GB501353 A GB 501353A GB 23349/37 A GB23349/37 A GB 23349/37A GB 2334937 A GB2334937 A GB 2334937A GB 501353 A GB501353 A GB 501353A
Authority
GB
United Kingdom
Prior art keywords
telephone
systems
class
impulse sending
relating
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
GB23349/37A
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 GB23349/37A priority Critical patent/GB501353A/en
Priority to US221667A priority patent/US2259334A/en
Publication of GB501353A publication Critical patent/GB501353A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Abstract

501,353. Automatic exchange systems. AUTOMATIC TELEPHONE & ELECTRIC CO., Ltd., and WRIGHT, D. Aug. 25, 1937, No. 23349. [Class 40 (iv)] The impulse sending cam of a dial switch such as that described in Specification 237,290 (Class 40 (iv)], or of a mechanical regenera tor such as that des cribed in Specifica tion 458, 095, is modified so that it vibrates a grounded contact 11 between fixed contacts connected to opposite ends of a transformer primary connected to battery at its mid-point, and so produces A.C. impulses in the transformer secondary. Resistances, and condensers 16 ... 19 prevent sparking. In a modification for higher frequencies, the movable contact is replaced by a spring coupled to a microphone.
GB23349/37A 1937-08-25 1937-08-25 Improvements in or relating to impulse sending arrangements for use in telephone or like systems Expired GB501353A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB23349/37A GB501353A (en) 1937-08-25 1937-08-25 Improvements in or relating to impulse sending arrangements for use in telephone or like systems
US221667A US2259334A (en) 1937-08-25 1938-07-28 Impulse sending arrangement for use in telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23349/37A GB501353A (en) 1937-08-25 1937-08-25 Improvements in or relating to impulse sending arrangements for use in telephone or like systems

Publications (1)

Publication Number Publication Date
GB501353A true GB501353A (en) 1939-02-27

Family

ID=10194214

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23349/37A Expired GB501353A (en) 1937-08-25 1937-08-25 Improvements in or relating to impulse sending arrangements for use in telephone or like systems

Country Status (2)

Country Link
US (1) US2259334A (en)
GB (1) GB501353A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457046A (en) * 1942-07-15 1948-12-21 Automatic Elect Lab Telephone signaling apparatus
NL70470C (en) * 1944-02-24

Also Published As

Publication number Publication date
US2259334A (en) 1941-10-14

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