CH42064A - Diaphragm for phonographic and telephone devices - Google Patents

Diaphragm for phonographic and telephone devices

Info

Publication number
CH42064A
CH42064A CH42064A CH42064DA CH42064A CH 42064 A CH42064 A CH 42064A CH 42064 A CH42064 A CH 42064A CH 42064D A CH42064D A CH 42064DA CH 42064 A CH42064 A CH 42064A
Authority
CH
Switzerland
Prior art keywords
phonographic
diaphragm
telephone devices
telephone
devices
Prior art date
Application number
CH42064A
Other languages
French (fr)
Inventor
George Coombs Joseph
Original Assignee
George Coombs Joseph
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 George Coombs Joseph filed Critical George Coombs Joseph
Publication of CH42064A publication Critical patent/CH42064A/en

Links

CH42064A 1907-09-28 1907-09-28 Diaphragm for phonographic and telephone devices CH42064A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH42064T 1907-09-28

Publications (1)

Publication Number Publication Date
CH42064A true CH42064A (en) 1908-12-16

Family

ID=4271761

Family Applications (1)

Application Number Title Priority Date Filing Date
CH42064A CH42064A (en) 1907-09-28 1907-09-28 Diaphragm for phonographic and telephone devices

Country Status (1)

Country Link
CH (1) CH42064A (en)

Similar Documents

Publication Publication Date Title
CH42064A (en) Diaphragm for phonographic and telephone devices
FR382260A (en) Improvements to diaphragms of phonographic and telephone devices
FR383195A (en) Advanced telephone diaphragm
FR375750A (en) Diaphragm for talking machines
CA121281A (en) Diaphragm for phonographic and telephonic apparatus
CH39107A (en) Diaphragm for talking disc machines
FR389133A (en) Support for telephone receiver
FR384887A (en) Anti-contact for telephone receivers
FR7142E (en) Mechanical device for announcements
FR375220A (en) Telephone systems with harmonic ringing tones
FR353051A (en) Record for phonographic devices
FR377965A (en) Coating for microphones and telephone receivers horns
AU958107B (en) Improvements in diaphragms or tympans for phonographic and telephonic apparatus
CH39532A (en) Telephone system
FR342840A (en) Rotating and hygienic diaphragm for phones
FR377966A (en) Telephone transmitter
FR7177E (en) Telephone microphone and receiver
FR381199A (en) Cooler for electrical devices
CH43655A (en) Phonograph for records and for phonographic postcards
FR374988A (en) Telephone system
FR380131A (en) Speaker acoustics
FR379290A (en) Selection device for telephones
FR373685A (en) electro-magnetic screen for cinematographs
FR382623A (en) Sound regulator for talking machines
FR396906A (en) Sound recorders and reproducers