GB190227497A - Improvements in Watertight Cases for Electric Bells & Telephones. - Google Patents

Improvements in Watertight Cases for Electric Bells & Telephones.

Info

Publication number
GB190227497A
GB190227497A GB190227497DA GB190227497A GB 190227497 A GB190227497 A GB 190227497A GB 190227497D A GB190227497D A GB 190227497DA GB 190227497 A GB190227497 A GB 190227497A
Authority
GB
United Kingdom
Prior art keywords
telephones
cases
electric bells
watertight
watertight cases
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
Lancelot Walter De Grave
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 GB190227497A publication Critical patent/GB190227497A/en
Expired legal-status Critical Current

Links

Landscapes

  • Telephone Set Structure (AREA)

Abstract

27,497. Grave, L. W. de. Dec. 13. Telephones.-Submerged telephone transmitters are enclosed in water-tight cases A provided with water - tight packing - glands D for the electrical connections. The microphone C is secured to a ferrotype iron or other diaphragm B.
GB190227497D 1902-12-13 1902-12-13 Improvements in Watertight Cases for Electric Bells & Telephones. Expired GB190227497A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190227497T 1902-12-13

Publications (1)

Publication Number Publication Date
GB190227497A true GB190227497A (en) 1903-12-12

Family

ID=32253100

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190227497D Expired GB190227497A (en) 1902-12-13 1902-12-13 Improvements in Watertight Cases for Electric Bells & Telephones.

Country Status (1)

Country Link
GB (1) GB190227497A (en)

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