GB191418033A - Improvements in or relating to Telephone Systems. - Google Patents

Improvements in or relating to Telephone Systems.

Info

Publication number
GB191418033A
GB191418033A GB191418033DA GB191418033A GB 191418033 A GB191418033 A GB 191418033A GB 191418033D A GB191418033D A GB 191418033DA GB 191418033 A GB191418033 A GB 191418033A
Authority
GB
United Kingdom
Prior art keywords
key
contact
relating
telephone systems
keyboard
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
Inventor
John George Blessing
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191418033A publication Critical patent/GB191418033A/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
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Telephone Set Structure (AREA)

Abstract

18,033. Blessing, J. G. July 1, 1913, [Convention date]. Keyboard switches.-A keyboard switch, used in a semi-automatic exchange telephone system, is shown in Fig. 8. The depression of any key 1, 5 ... 0 closes the corresponding contact 80 and also moves a series of steel balls 84 to left and right to close a contact 93, which is opened as soon as the key is released, and a contact 83 which is retained closed by a catch until a key 87 is depressed. Specification 5249/13, [Class 40 (iv), Telephones &c.], is referred to.
GB191418033D 1913-07-31 1914-07-30 Improvements in or relating to Telephone Systems. Expired GB191418033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191418033XA 1913-07-31 1913-07-31

Publications (1)

Publication Number Publication Date
GB191418033A true GB191418033A (en) 1915-07-30

Family

ID=32657058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191418033D Expired GB191418033A (en) 1913-07-31 1914-07-30 Improvements in or relating to Telephone Systems.

Country Status (2)

Country Link
FR (1) FR476040A (en)
GB (1) GB191418033A (en)

Also Published As

Publication number Publication date
FR476040A (en) 1915-07-07

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