GB335679A - An improved device for translating mechanical vibrations into electrical waves - Google Patents

An improved device for translating mechanical vibrations into electrical waves

Info

Publication number
GB335679A
GB335679A GB2377929A GB2377929A GB335679A GB 335679 A GB335679 A GB 335679A GB 2377929 A GB2377929 A GB 2377929A GB 2377929 A GB2377929 A GB 2377929A GB 335679 A GB335679 A GB 335679A
Authority
GB
United Kingdom
Prior art keywords
plate
vibrating
stylus
armature
clamped
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
GB2377929A
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.)
RICHARD EDWIN GORDON TUGWOOD
Original Assignee
RICHARD EDWIN GORDON TUGWOOD
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 RICHARD EDWIN GORDON TUGWOOD filed Critical RICHARD EDWIN GORDON TUGWOOD
Priority to GB2377929A priority Critical patent/GB335679A/en
Priority to FR701316D priority patent/FR701316A/en
Publication of GB335679A publication Critical patent/GB335679A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00Variable-resistance transducers
    • H04R21/04Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

335,679. Tugwood, R. E. G. Aug. 2, 1929. Microphones; gramophone pick-ups; magneto - microphonic relays.-The pressure on the granular material of a microphone is adjusted by an adjustable pressure member, bearing on the vibrating member, and supported by cushioning means from a rigid support. In the gramophone pickup, Figs. 1, 2, the fixed electrode is a plate 7 of carbon, metal, &c., located in a recessed plate 3, holding the granular carbon, &c., 4, the vibrating carbon or metal electrode 5 being clamped to the plate 3 by screws 6 at one end, and driven by a stylus-arm 10 to which an adjustable force can be applied by a screw 14 through the packing- piece 15 for varying the compression of the granules. Extensions 12 of the stylus-bar are clamped by means of a plate 11 to the casing of the instrument, rubber cushioning 13 being arranged round the said extensions. In a modified pick-up (Figs. 4 and 5, not shown) adapted to work in a horizontal position, the vibrating electrode is clamped at both ends, and is preferably thinned near the attachment surfaces, the stylus-bar having two limbs at right-angles. In a magneto-microphonic relay, the armature 22, Fig. 3, of the magnet 21 drives the vibrating electrode 5 through a rod 23, and the adjustable pressure is applied to the armature by a screw 25, means being also provided for the adjustment of the magnet 21 relative to the armature. According to the first Provisional Specification an output transformer may be incorporated in the device.
GB2377929A 1929-08-02 1929-08-02 An improved device for translating mechanical vibrations into electrical waves Expired GB335679A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2377929A GB335679A (en) 1929-08-02 1929-08-02 An improved device for translating mechanical vibrations into electrical waves
FR701316D FR701316A (en) 1929-08-02 1930-07-23 Advanced device for transforming mechanical vibrations into electrical waves

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2377929A GB335679A (en) 1929-08-02 1929-08-02 An improved device for translating mechanical vibrations into electrical waves

Publications (1)

Publication Number Publication Date
GB335679A true GB335679A (en) 1930-10-02

Family

ID=10201177

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2377929A Expired GB335679A (en) 1929-08-02 1929-08-02 An improved device for translating mechanical vibrations into electrical waves

Country Status (2)

Country Link
FR (1) FR701316A (en)
GB (1) GB335679A (en)

Also Published As

Publication number Publication date
FR701316A (en) 1931-03-14

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