GB191225174A - Improvements in Telephone Exchange Systems. - Google Patents

Improvements in Telephone Exchange Systems.

Info

Publication number
GB191225174A
GB191225174A GB191225174DA GB191225174A GB 191225174 A GB191225174 A GB 191225174A GB 191225174D A GB191225174D A GB 191225174DA GB 191225174 A GB191225174 A GB 191225174A
Authority
GB
United Kingdom
Prior art keywords
spring
shaft
revolution
winding
secured
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
Other languages
English (en)
Inventor
Frank Robert Mcberty
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 GB191225174A publication Critical patent/GB191225174A/en
Expired legal-status Critical Current

Links

Landscapes

  • Transmission Devices (AREA)
  • Relay Circuits (AREA)
GB191225174D 1911-11-03 1912-11-02 Improvements in Telephone Exchange Systems. Expired GB191225174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US191225174XA 1911-11-03 1911-11-03

Publications (1)

Publication Number Publication Date
GB191225174A true GB191225174A (en) 1913-09-25

Family

ID=32597108

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191225174D Expired GB191225174A (en) 1911-11-03 1912-11-02 Improvements in Telephone Exchange Systems.

Country Status (4)

Country Link
DE (1) DE276607C (enrdf_load_stackoverflow)
FR (1) FR452368A (enrdf_load_stackoverflow)
GB (1) GB191225174A (enrdf_load_stackoverflow)
NL (1) NL1860C (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR452368A (fr) 1913-05-15
DE276607C (enrdf_load_stackoverflow)
NL1860C (enrdf_load_stackoverflow)

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