US673512A - Microtelephonic apparatus. - Google Patents

Microtelephonic apparatus. Download PDF

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Publication number
US673512A
US673512A US3871100A US1900038711A US673512A US 673512 A US673512 A US 673512A US 3871100 A US3871100 A US 3871100A US 1900038711 A US1900038711 A US 1900038711A US 673512 A US673512 A US 673512A
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Prior art keywords
microtelephonic
circuit
call
blade
spring
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Expired - Lifetime
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US3871100A
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Jacob Berliner
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    • 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

Definitions

  • the object of my invention is to construct a microtelephonic apparatus which differs from those hitherto in use in that the part by which the apparatus is taken hold of contains a tapper-switch consisting of two parts,one of which closes, when depressed, the call-bell circuit, while the other closes the microphonic circuit on being pressed down.
  • the sending-microphone and the receiver are connected to each other by an intermediate hollow piece, preferably of wood, having attached to it by means of a screw connected to the line a spring-blade, on the face of which are connected two strips of insulating material.
  • the ends of the spring-blade are held by its elasticity away from contacts connected the one to the call-bell circuit and the other to the microphonic circuit. On the former end of the tapper being depressed the call-bell circuit is closed, while the depressing of the other end closes the microphone-circuit.
  • FIG. 1 is a longitudinal section of the microtelephonic apparatus built according to my invention.
  • Fig. 2 is a front view of same, and
  • Fig. 3 a diagram showing the run of the circuits.
  • a is the microphone
  • b the telephone
  • g a connecting member between the telephone and microphone.
  • the call-bell contact-maker is according to the present invention so combined with the switching device for themicrophone that the aforesaid tapper-switch consists of two parts, one of which closes, on being depressed, the call-bell circuit, while the other on being so acted on closes the microphone-circuit.
  • the connecting member g is provided with a screw d, connected to the line and serving to fix to the connecting-piece a spring-blade h, to which are attached the insulating-pieces e and f, which on being depressed cause the ends of the spring-blade to contact with contact spring-blade and connected to the call-bell circuit and a contact-screw opposite the other end of the spring-blade and connected to the microphonic circuit, substantially as described.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Electrophonic Musical Instruments (AREA)

Description

No. 673,5l'2. Patented May 7, I901.
J. BERLINER.
MICRUTELEPHONIC APPARATUS.
(Application filed Dec. 4. 1900.-
2 Sheets-Sheet I.
(No Model.)
Easy-#60771 1 m: NORRIS virus can PuoYo-umo wAsnmurcn. n. c.
No. 673,512. Patented May 7, l90l.
. J. BERL|NER.-
MICBOTELEP HONIG APPARATUS.
(Application filed Dec. 4, 1900.)
(No Model) 2 Sheets-Sheet 2.
UNITED STATES.
PATENT OFFICE.
JAooB BERLINER, on HANOVER, GERMANY.
M ICROTE LEPHONIC APPARATUS.
SPECIFICATION forming part of Letters Patent N 0. 673,512, dated May '7, 1901. Application filed December 4, 1900. Serial No. 38,711. (No model.)
To all whom it may concern.-
Be it known that I, J AOOB BERLINER, a subject of the King of Prussia, Emperor of Germany, residing at No. 24 Kornerstrasse, Hanover, Kingdom of Prussia, German Empire, have invented a new and useful Microtelephonic Apparatus, of which the following is a specification.
The object of my invention is to construct a microtelephonic apparatus which differs from those hitherto in use in that the part by which the apparatus is taken hold of contains a tapper-switch consisting of two parts,one of which closes, when depressed, the call-bell circuit, while the other closes the microphonic circuit on being pressed down. The sending-microphone and the receiver are connected to each other by an intermediate hollow piece, preferably of wood, having attached to it by means of a screw connected to the line a spring-blade, on the face of which are connected two strips of insulating material. The ends of the spring-blade are held by its elasticity away from contacts connected the one to the call-bell circuit and the other to the microphonic circuit. On the former end of the tapper being depressed the call-bell circuit is closed, while the depressing of the other end closes the microphone-circuit.
The preferred form of my invention is shown in the accompanying drawings, in which- Figure 1 is a longitudinal section of the microtelephonic apparatus built according to my invention. Fig. 2 is a front view of same, and Fig. 3 a diagram showing the run of the circuits.
In the drawings, a is the microphone, b the telephone, and g a connecting member between the telephone and microphone.
While in the usual apparatus of this class a special push or knob independent of the apparatus has to be depressed in order to call a correspondent, the call-bell contact-maker is according to the present invention so combined with the switching device for themicrophone that the aforesaid tapper-switch consists of two parts, one of which closes, on being depressed, the call-bell circuit, while the other on being so acted on closes the microphone-circuit.
As shown in the drawings, the connecting member g is provided with a screw d, connected to the line and serving to fix to the connecting-piece a spring-blade h, to which are attached the insulating-pieces e and f, which on being depressed cause the ends of the spring-blade to contact with contact spring-blade and connected to the call-bell circuit and a contact-screw opposite the other end of the spring-blade and connected to the microphonic circuit, substantially as described.
In testimony whereof I have hereunto set I a contact-screw opposite to the one end of the my hand in presence of two subscribing witnesses.
JACOB BERLINER. Witnesses:
S. GOLDSCHMIDT, Ge. FISCHER.
US3871100A 1900-12-04 1900-12-04 Microtelephonic apparatus. Expired - Lifetime US673512A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3871100A US673512A (en) 1900-12-04 1900-12-04 Microtelephonic apparatus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3871100A US673512A (en) 1900-12-04 1900-12-04 Microtelephonic apparatus.

Publications (1)

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US673512A true US673512A (en) 1901-05-07

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US3871100A Expired - Lifetime US673512A (en) 1900-12-04 1900-12-04 Microtelephonic apparatus.

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