US222390A - Improvement in carbon-telephones - Google Patents

Improvement in carbon-telephones Download PDF

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Publication number
US222390A
US222390A US222390DA US222390A US 222390 A US222390 A US 222390A US 222390D A US222390D A US 222390DA US 222390 A US222390 A US 222390A
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Prior art keywords
carbon
telephones
improvement
circuit
material
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Thomas A Edison
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Western Union Telegraph Co
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Western Union Telegraph Co
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00Variable-resistance transducers
    • H04R21/02Microphones
    • H04R21/021Microphones with granular resistance material

Description

- BEST QGW T. A. Eblso-N. Carbon Telephone.

No 222,390. Patented Dec.9,1879.

UNITED ST TE PATENT FFIGE}.

THOMAS A. EDISON, OF MEN Lo PARK, NEW JERSEY, ASSIGNOR T0 wns'rnnn 1 J UNION TELEGRAPH COMPANY, or new YORK, n. Y.

IIMPROVEM EMT IN CARBON-TELEPHONES.

I Specification forming part of Letters Patent No. 222,390, dated Drccmbcr 9, P379; application filed November 11, 1 87B.

To all trhoin ztmay concern:

be it known that I. Tnomms ALVA Emson,

ot .\lonlo Park, in the county of Middlescx y andbtate of Sew Jersey, have invented an lm 'n'm'cznent' in Telephones, of which'the following is a. specification.

Thisinvcntion 1 term the micro-telephone,

' in consequence of the same responding to. ininute vibrations oi the instrument itself, transmitted to it by anysoiid body or of the atmosphere, and in so doingtransinitting electric pulsations toa distance, where they can be re ccivcdfby an ordinary telephone.

In the drawings, Figure 1 is nsectioncf the instrument, and Fig. 2 is a. plan of the some.

The box A is of a suitable size and shape for holding the apparatus, and for acting as a resonant case, one side thereof being open. -'l 'his casecon veys to the apparatus any vibrations or disturbance resulting from the soundvibrations of the atmosphere or from the vibration oi' thc-solid material upon which the box rests. I

In the box A is an opening, preferably round, in which is the diaphragm p, :"nd upon this diaphragm is apiece of compressed finelydividcd conducting material, such as carbon, n. A second piece of carbon or similar material, on, is secured to alcrer, c, the fulcrum or pivot of which is at a.

A lever-arm, h, and movable weight i may be employed to' balance the lever c and parts connected therewith, and the dclicatespring e'nnd ndjusting-spimlle f serve to increase or decrease the pressure of the buttons in 1: upon each other.

; The-pinto k,-ot'. li ht material, such as mice,

is connected with t e lever c, and this is within and protected by n funnel or mouth-piece, B, upon the box A.

It is now to be understood that the slightest vibration .or'j'ar given .to the nppnrntus, such as that resulting from walking ut o-room,

or from the articulate speech or Bound-vibrations, vary the pressure of m "upon each other,

and in so doing the electric condition of a circuit passing through 11- m c and wires 3 4 is varied, and a corresponding response. occurs in at distant receiving-telephone. The finelydivided carbon or other material between I: and 2 thus becomes a circuit-regulator, that acts to vary the resistanecin proportion to the vibration of the parts.

This transmitter is either included in .1 short circuit containing a receivingiclephone and' 1. The combination, with n resonant case or support, of the carbon or similar mnteriuhthe lever c.'disk k, and circuitc nnections. substantially as set forth.

2. Thc'combination of two movingplates or dinphragms, p and-k, with finely divided carbon or similar material intervening, and the circuit-connections passing through the some, substantially aseet forth.

8. The combination, with a resonant case, of two diuphrngms or plates, 1) and k, upon which sound or other vibrations o crate, and a circuit-regulator of fiuely-divi ed carbon or other material placed between such, plates k nndp and the circuit-connections, substantially no set forth.

Signed by me this 8th day of November, A. D. 1 78.

THOMAS A. EDISON. 'Witncaces:

a. L. GRIFFIN, Clue. BATOHELOB'.

US222390A 1878-11-11 1878-11-11 Improvement in carbon-telephones Expired - Lifetime US222390A (en)

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US222390T true 1878-11-11 1878-11-11

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US222390A Expired - Lifetime US222390A (en) 1878-11-11 1878-11-11 Improvement in carbon-telephones

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7345670B2 (en) 1992-03-05 2008-03-18 Anascape Image controller
US20110177466A1 (en) * 2009-01-21 2011-07-21 Cheiky Michael C System and method for biomass fractioning
US8173044B1 (en) 2011-05-09 2012-05-08 Cool Planet Biofuels, Inc. Process for biomass conversion to synthesis gas
US8236085B1 (en) 2011-06-06 2012-08-07 Cool Planet Biofuels, Inc. Method for enhancing soil growth using bio-char
US8308911B2 (en) 2009-01-09 2012-11-13 Cool Planet Biofuels, Llc System and method for atmospheric carbon sequestration
US8367881B2 (en) 2011-05-09 2013-02-05 Cool Planet Biofuels, Inc. Method for biomass fractioning by enhancing biomass thermal conductivity
US8431757B2 (en) 2011-03-24 2013-04-30 Cool Planet Biofuels, Inc. Method for making renewable fuels
US8430937B2 (en) 2011-07-25 2013-04-30 Cool Planet Biofuels, Inc. Method for producing negative carbon fuel
US8674932B2 (en) 1996-07-05 2014-03-18 Anascape, Ltd. Image controller
US8951476B2 (en) 2011-03-24 2015-02-10 Cool Planet Energy Systems, Inc. System for making renewable fuels
US9260666B2 (en) 2011-07-25 2016-02-16 Cool Planet Energy Systems, Inc. Method for reducing the carbon footprint of a conversion process
US9328290B2 (en) 2011-03-24 2016-05-03 Cool Planet Energy Systems, Inc. System and method for making renewable fuels
US9493380B2 (en) 2011-06-06 2016-11-15 Cool Planet Energy Systems, Inc. Method for enhancing soil growth using bio-char
US9493379B2 (en) 2011-07-25 2016-11-15 Cool Planet Energy Systems, Inc. Method for the bioactivation of biochar for use as a soil amendment
US9909067B2 (en) 2009-01-21 2018-03-06 Cool Planet Energy Systems, Inc. Staged biomass fractionator
US9944538B2 (en) 2013-10-25 2018-04-17 Cool Planet Energy Systems, Inc. System and method for purifying process water

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9081426B2 (en) 1992-03-05 2015-07-14 Anascape, Ltd. Image controller
US7345670B2 (en) 1992-03-05 2008-03-18 Anascape Image controller
US8674932B2 (en) 1996-07-05 2014-03-18 Anascape, Ltd. Image controller
US8308911B2 (en) 2009-01-09 2012-11-13 Cool Planet Biofuels, Llc System and method for atmospheric carbon sequestration
US20110177466A1 (en) * 2009-01-21 2011-07-21 Cheiky Michael C System and method for biomass fractioning
US8293958B2 (en) 2009-01-21 2012-10-23 Cool Planet Biofuels, Inc. System and method for biomass fractioning
US8216430B2 (en) 2009-01-21 2012-07-10 Cool Planet Biofuels, Inc. System and method for biomass fractioning
US9909067B2 (en) 2009-01-21 2018-03-06 Cool Planet Energy Systems, Inc. Staged biomass fractionator
US9951280B2 (en) 2011-03-24 2018-04-24 Cool Planet Energy Systems, Inc. System and method for making renewable fuels
US9403140B2 (en) 2011-03-24 2016-08-02 Cool Planet Energy Systems, Inc. System for making renewable fuels
US9328290B2 (en) 2011-03-24 2016-05-03 Cool Planet Energy Systems, Inc. System and method for making renewable fuels
US8431757B2 (en) 2011-03-24 2013-04-30 Cool Planet Biofuels, Inc. Method for making renewable fuels
US8951476B2 (en) 2011-03-24 2015-02-10 Cool Planet Energy Systems, Inc. System for making renewable fuels
US9333474B2 (en) 2011-05-09 2016-05-10 Cool Planet Energy Systems, Inc. Method for biomass fractioning by enhancing biomass thermal conductivity
US10066167B2 (en) 2011-05-09 2018-09-04 Cool Planet Energy Systems, Inc. Method for biomass fractioning by enhancing biomass thermal conductivity
US8372311B2 (en) 2011-05-09 2013-02-12 Cool Planet Biofuels, Inc. Process for biomass conversion to synthesis gas
US8367881B2 (en) 2011-05-09 2013-02-05 Cool Planet Biofuels, Inc. Method for biomass fractioning by enhancing biomass thermal conductivity
US8173044B1 (en) 2011-05-09 2012-05-08 Cool Planet Biofuels, Inc. Process for biomass conversion to synthesis gas
US8317891B1 (en) 2011-06-06 2012-11-27 Cool Planet Biofuels, Inc. Method for enhancing soil growth using bio-char
US9493380B2 (en) 2011-06-06 2016-11-15 Cool Planet Energy Systems, Inc. Method for enhancing soil growth using bio-char
US8236085B1 (en) 2011-06-06 2012-08-07 Cool Planet Biofuels, Inc. Method for enhancing soil growth using bio-char
US8317892B1 (en) 2011-06-06 2012-11-27 Cool Planet Biofuels, Inc. Method for enhancing soil growth using bio-char
US10093588B2 (en) 2011-06-06 2018-10-09 Cool Planet Energy Systems, Inc. Method for enhancing soil growth using bio-char
US9493379B2 (en) 2011-07-25 2016-11-15 Cool Planet Energy Systems, Inc. Method for the bioactivation of biochar for use as a soil amendment
US9359268B2 (en) 2011-07-25 2016-06-07 Cool Planet Energy Systems, Inc. Method for producing negative carbon fuel
US9260666B2 (en) 2011-07-25 2016-02-16 Cool Planet Energy Systems, Inc. Method for reducing the carbon footprint of a conversion process
US9963650B2 (en) 2011-07-25 2018-05-08 Cool Planet Energy Systems, Inc. Method for making sequesterable biochar
US8430937B2 (en) 2011-07-25 2013-04-30 Cool Planet Biofuels, Inc. Method for producing negative carbon fuel
US8568493B2 (en) 2011-07-25 2013-10-29 Cool Planet Energy Systems, Inc. Method for producing negative carbon fuel
US9944538B2 (en) 2013-10-25 2018-04-17 Cool Planet Energy Systems, Inc. System and method for purifying process water

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