US1386744A - Telephone and microtelephone - Google Patents

Telephone and microtelephone Download PDF

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Publication number
US1386744A
US1386744A US244342A US24434218A US1386744A US 1386744 A US1386744 A US 1386744A US 244342 A US244342 A US 244342A US 24434218 A US24434218 A US 24434218A US 1386744 A US1386744 A US 1386744A
Authority
US
United States
Prior art keywords
telephone
handle
spring
microtelephone
ear
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 - Lifetime
Application number
US244342A
Other languages
English (en)
Inventor
Robert Aernout Baron Va Lynden
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.)
AMERICAN THERMOPHONE Co
Original Assignee
AMERICAN THERMOPHONE Co
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 AMERICAN THERMOPHONE Co filed Critical AMERICAN THERMOPHONE Co
Application granted granted Critical
Publication of US1386744A publication Critical patent/US1386744A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer

Definitions

  • This invention relates to an improvement in or relating to telephones or microtelephones wherein the plane of the earpiece is placed perpendicular to the axis of the handle.
  • My invention relates to an improved construction in which the earpiece can move with respect to the handle in the direction of the axis. This movement is limited in any way by stops or by abutments while bothparts are normally forced apart by means of a spring; in the position wherein both parts are brought as close together as possible, a switch is operated to close a gap provided in the circuit of the telephone or of the telephone and the microphone.
  • Figure 1 is a cross section of a telephone according to this invention, this particular embodiment comprising a thermic telephone instead of the usual electromagnetical telephone with diaphragm.
  • Fig. 2 is a front view of the telephone represented in Fig. 1.
  • the ear-piece, 2 the thermic-telephone member, containing the known heat-conductors and with the same the external terminal 3 of the telephone is connected.
  • the ear-piece 1 is screwed in a bushing at, the bottom 5 whereof is provided with an aperture 6 through which passes a hollow cylindrical part 7 which is screwed with its lower end in the handle 8 of the telephone.
  • the part 7 is movable in the direction of the axis in the bushing 4 over a relatively short distance, which is determined by the distance between the external terminai 3 of the thermic-telephone and the inner terminal 9 which is fixed to the part 7 on the handle.
  • the terminals or contacts 3 and 9 with the parts connected therewith are norp mally separated by means of a spring 10, the ends whereof rest in spring caps 11 and Specification of Letters Patent. Patenfigd Aug, 9, 1921,
  • the spring cap 12 is insulated from the inner terminal or contact 9 and each of these parts 9 and 12 is connected with one of the wires of the flexible cord 15. From the spring cap 12 the current passes to the spring 10 and then to the spring cap 11, the body 2 of the thermic telephone and the outer terminal 3; the spring cap 11 and the terminal 3 are insulated from one another and between these two parts the thermic telephone is provided.
  • the part 7 moves slightly lengthwise in the bushing 4 thus compressing the spring 10.
  • the terminals or contacts 3, 9 are thus brought into contact with one another so that the telephone circuit, which until then was open, is now closed.
  • the terminals 3 and 9 Serve at the same time as abutments for the limitation of the relative movement of the parts 4: and 7.
  • the telephone-circuit or the telephone and microphone circuit is closed. It is also possible to interrupt any other circuit, for example by the switch 3, 9 the electrical connec tion of the microphone battery with the microtelephone may be effected.
  • the invention is not limited to thermo-telephones but may be applied with the same advantage to the well-known electromagnetical telephones.
  • a telephone comprising a handle member and another member connected therewith slidably and carrying the telephonic apparatus proper, a spring tending to separate said members, and a switch operated by the relative movement of said members.
  • a telephone comprising a telephone member proper containing the acoustic parts of the telephone, a handle for said member,
  • A. telephone comprising a telephone member proper containing the acoustic parts of the telephone, a handle fitted into said member to slide lengthwise thereof, a spring contained Within said member and tending to project the handle fronrsaid member, and a switch operated by the relative movement 7 of handle and telephone member.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Telephone Set Structure (AREA)
US244342A 1917-07-16 1918-07-11 Telephone and microtelephone Expired - Lifetime US1386744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL3594T 1917-07-16

Publications (1)

Publication Number Publication Date
US1386744A true US1386744A (en) 1921-08-09

Family

ID=22922333

Family Applications (1)

Application Number Title Priority Date Filing Date
US244342A Expired - Lifetime US1386744A (en) 1917-07-16 1918-07-11 Telephone and microtelephone

Country Status (4)

Country Link
US (1) US1386744A (de)
FR (1) FR490806A (de)
GB (1) GB123255A (de)
NL (1) NL3594C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862379A (en) * 1972-07-11 1975-01-21 Akg Akustische Kino Geraete Headphone construction for interpreter translator arrangements

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862379A (en) * 1972-07-11 1975-01-21 Akg Akustische Kino Geraete Headphone construction for interpreter translator arrangements

Also Published As

Publication number Publication date
NL3594C (de)
GB123255A (en) 1919-02-20
FR490806A (fr) 1919-05-10

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