GB190815818A - Improvements in Telephone Cordless Switchboards. - Google Patents

Improvements in Telephone Cordless Switchboards.

Info

Publication number
GB190815818A
GB190815818A GB190815818DA GB190815818A GB 190815818 A GB190815818 A GB 190815818A GB 190815818D A GB190815818D A GB 190815818DA GB 190815818 A GB190815818 A GB 190815818A
Authority
GB
United Kingdom
Prior art keywords
switchboards
switch
telephone cordless
drum
cordless
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
William Aitken
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 GB190815818A publication Critical patent/GB190815818A/en
Expired legal-status Critical Current

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  • Alarm Systems (AREA)

Abstract

15,818. Aitken, W. July 25. Drawings to Specification. Indicators or annunciators.-In an exchange telephone system, a two-way switch is combined with a revolving-drum annunciator of the kind described in Specification No. 13,312, A.D. 1906, in such a manner that the drum is restored to its normal position by the top spring of the switch when the switch is turned downwards.
GB190815818D 1908-07-25 1908-07-25 Improvements in Telephone Cordless Switchboards. Expired GB190815818A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190815818T 1908-07-25

Publications (1)

Publication Number Publication Date
GB190815818A true GB190815818A (en) 1908-12-10

Family

ID=32552400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190815818D Expired GB190815818A (en) 1908-07-25 1908-07-25 Improvements in Telephone Cordless Switchboards.

Country Status (1)

Country Link
GB (1) GB190815818A (en)

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