US1335592A - Transmitting device for micro oscillations - Google Patents

Transmitting device for micro oscillations Download PDF

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Publication number
US1335592A
US1335592A US221192A US22119218A US1335592A US 1335592 A US1335592 A US 1335592A US 221192 A US221192 A US 221192A US 22119218 A US22119218 A US 22119218A US 1335592 A US1335592 A US 1335592A
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US
United States
Prior art keywords
lever
micro
transmitting device
oscillations
diaphragms
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
US221192A
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English (en)
Inventor
Meidell Birger
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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
Priority to NL4873D priority Critical patent/NL4873C/xx
Application filed by Individual filed Critical Individual
Priority to US221192A priority patent/US1335592A/en
Application granted granted Critical
Publication of US1335592A publication Critical patent/US1335592A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/023—Microphones with more than one granular chamber

Definitions

  • the present invention has for its object a transmitting device for micro oscillations, and the object of the invention is to obtain a more effective transmission than by the apparatuses at present in use in microphones, gramophones, etc.
  • microphones comprising two simultaneously' actuated diaphragms with a common intermediate grain box so that the effect of the sound is doubled. Further it is known to increase the effect of the microphone by connecting the diaphragm with the carbon grain box by means of a system of levers. known however it is difficult to make lever systems of this kind effective with regard to the reproduction of weak sound waves.
  • the present invention consists in a combination of the two systems above referred to, said-combination being carried out in such a manner, that the two effective dia--" phragms are connected to a single lever mechanism at points so located that all bearing pressure in the pivot point of the lever is eliminated or at least reduced to a minimum, so that all desired transmission of micro movements to the stationary parts of the apparatus is obviated, whereby even the weakest oscillations reach the working part of the mechanism without loss of energy.
  • the invention may practically be carried out in such a manner that the lever system is not mounted in a stationary pivot and is free to oscillate on one (or more) lmaginary axes.
  • a and B are two diaphragms, C and D carbon grain boxes and E, F the movable electrodes of the same, said electrodes being mounted at opposite ends of lever G, which is connected with the diaphragms in any suitable manner for instance as illustrated on the dr'awing'by means of short columns H, I .pivotally connected to lever G.
  • dotted lines indicate how a mouth piece or the like may suitably be adapted to a microphone as above described.
  • a pair of parallel diaphragms In an apparatus for transmitting micro-oscillations, a pair of parallel diaphragms, a pair of carbon boxes each "parallel to a diaphragm, an electrode. in each box, a lever whose ends are in contact with the electrodes and means to connect the diaphragms 'pi'votally to said lever on opposite sides of its axis of oscillation.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
US221192A 1918-03-08 1918-03-08 Transmitting device for micro oscillations Expired - Lifetime US1335592A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL4873D NL4873C (ref) 1918-03-08
US221192A US1335592A (en) 1918-03-08 1918-03-08 Transmitting device for micro oscillations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US221192A US1335592A (en) 1918-03-08 1918-03-08 Transmitting device for micro oscillations

Publications (1)

Publication Number Publication Date
US1335592A true US1335592A (en) 1920-03-30

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ID=22826757

Family Applications (1)

Application Number Title Priority Date Filing Date
US221192A Expired - Lifetime US1335592A (en) 1918-03-08 1918-03-08 Transmitting device for micro oscillations

Country Status (2)

Country Link
US (1) US1335592A (ref)
NL (1) NL4873C (ref)

Also Published As

Publication number Publication date
NL4873C (ref)

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