GB191122356A - Improvements in or relating to Loud Speaking Telephonic Apparatus. - Google Patents

Improvements in or relating to Loud Speaking Telephonic Apparatus.

Info

Publication number
GB191122356A
GB191122356A GB191122356DA GB191122356A GB 191122356 A GB191122356 A GB 191122356A GB 191122356D A GB191122356D A GB 191122356DA GB 191122356 A GB191122356 A GB 191122356A
Authority
GB
United Kingdom
Prior art keywords
ear
relating
calling
lamp
door
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
Edward Alfred Graham
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 GB191122356A publication Critical patent/GB191122356A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

22,356. Graham, E. A. Oct. 10. Mouthpieces and ear-pieces; telephones, mounting and supporting; direct-call systems and apparatus. -The diaphragm chamber of the receiver 3 is connected co the loud-speaking trumpet 39 and to the ear-tubes 33, 40. The transmitter 22 is mounted on the back of the door 21 of the casing 2, the door being shown open in Fig. 3. The arm 25 for operating the speaking-circuit switch 26 and for agitating the granules as described in Specification 10,965/10 is actuated by the thumb-piece 27, or by the rod 30 when the ear-piece 33 is raised. The calling-push, calling-vibrator, and lamp are mounted in the casing 10. The circuits of a directcall system are arranged as shown in Fig. 5, where the relay 7 brings into circuit the lamp 6 when a call is received. Specifications 3935/07, 25,112/09, and 8024/10 are also referred to.
GB191122356D 1911-10-10 1911-10-10 Improvements in or relating to Loud Speaking Telephonic Apparatus. Expired GB191122356A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191122356T 1911-10-10

Publications (1)

Publication Number Publication Date
GB191122356A true GB191122356A (en) 1912-02-22

Family

ID=32639672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191122356D Expired GB191122356A (en) 1911-10-10 1911-10-10 Improvements in or relating to Loud Speaking Telephonic Apparatus.

Country Status (1)

Country Link
GB (1) GB191122356A (en)

Similar Documents

Publication Publication Date Title
CA2484027A1 (en) Electronic stethoscope system
GB1280388A (en) Telephone instrument
US3867585A (en) Electronic tone ringer
US3553374A (en) Acoustic coupler
GB191122356A (en) Improvements in or relating to Loud Speaking Telephonic Apparatus.
US2500264A (en) Handset support and inductive pickup for telephone signal amplifying system
US3404234A (en) Confessional construction
JP2896592B2 (en) Cordless button telephone equipment
GB793543A (en) Improvements in or relating to telephone signalling systems
GB191122634A (en) Improvements relating to Telephonic Apparatus.
GB690296A (en) Improvements in loud speaking telephones
GB638930A (en) Improvements in and relating to radio and intercommunication apparatus and systems
GB191302022A (en) Improvements in or relating to Telephonic Systems,
GB795144A (en) Improvements in or relating to loud-speaking telephone apparatus
US1020898A (en) Telephonic apparatus.
US2100887A (en) Interior telephone equipment
GB702571A (en) Improvements in or relating to loudspeaking telephone installations
KR950010378Y1 (en) Keyphone with laud bell connecting device
US2279485A (en) Combined mounting and signal device for hand telephones
US269884A (en) James harris rogers
JPH11261710A (en) Interphone device
GB191029685A (en) Improvements in Telephones.
GB190929985A (en) Improvements in or relating to Telephony and Telegraphy.
GB191212545A (en) Improvements in Combined Telephonic Transmitters and Receivers.
JPH03133238A (en) Loudspeaker mechanism and wireless loudspeaker telephone set