GB190513228A - Improvements in Telephone or like Transmitters. - Google Patents

Improvements in Telephone or like Transmitters.

Info

Publication number
GB190513228A
GB190513228A GB190513228DA GB190513228A GB 190513228 A GB190513228 A GB 190513228A GB 190513228D A GB190513228D A GB 190513228DA GB 190513228 A GB190513228 A GB 190513228A
Authority
GB
United Kingdom
Prior art keywords
carbon
polished
cover
balls
insulated
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 Shepherd Sawrey
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 GB190513228A publication Critical patent/GB190513228A/en
Expired legal-status Critical Current

Links

Landscapes

  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

13,228. Sawrey, J. S. June 27. Ear appliances.-Microphones for the use of deaf persons are constructed with hollow balls of carbon, or material coated with carbon, either polished or unpolished. The back carbon electrode B has a number of polished recesses C to receive the hollow carbon balls N. The polished carbon diaphragm A is supported in the cover D by insulated rings F, A, and is connected to the leads T<1>, T<2> by a metal ring 0, touching the diap h r a g m but insulated from the cover D. The microphone is mounted in an outer casing H, acting as a sound resonator, and formed with a number of segmental openings Z, and a central cone Y, whereby the sound is deflected into the hole K of the cover D.
GB190513228D 1905-06-27 1905-06-27 Improvements in Telephone or like Transmitters. Expired GB190513228A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190513228T 1905-06-27

Publications (1)

Publication Number Publication Date
GB190513228A true GB190513228A (en) 1906-06-07

Family

ID=32197382

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190513228D Expired GB190513228A (en) 1905-06-27 1905-06-27 Improvements in Telephone or like Transmitters.

Country Status (1)

Country Link
GB (1) GB190513228A (en)

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