GB686777A - Improvements in electrical sound recording and reproducing apparatus - Google Patents

Improvements in electrical sound recording and reproducing apparatus

Info

Publication number
GB686777A
GB686777A GB352650A GB352650A GB686777A GB 686777 A GB686777 A GB 686777A GB 352650 A GB352650 A GB 352650A GB 352650 A GB352650 A GB 352650A GB 686777 A GB686777 A GB 686777A
Authority
GB
United Kingdom
Prior art keywords
block
lever
spring
record
rods
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
GB352650A
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.)
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
Application filed by Individual filed Critical Individual
Priority to GB352650A priority Critical patent/GB686777A/en
Publication of GB686777A publication Critical patent/GB686777A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

686,777. Crystal phonographic recorders; loudspeakers. SYKES, A. F. March 9, 1951 [Feb. 11, 1950], No. 3526/50. Class 40 (iv). A transducer, shown in plan in Fig. I, comprises a pair of crystal rods 2, 2a vibratable longitudinally, one pair of ends being fixed to a block 12 and the free ends being hinged to a lever 18 integral with a stylus which can thus vibrate laterally. Bending is prevented by a ball 136 interposed between the lever 18 and the block 12, the lever 18 being urged towards the block 12 by an adjustable spring, Fig. VII (not shown). The crystal rods are maintained under compression by a spring-tensioned cord 3. The block 12 carries a sliding ball or shoe 7 for contact with the record or record blank. The block 12 is pivoted about a horizontal axis 24, being counter-balanced by a spring 8, and can be lifted from the record or blank by a screw lever 11. The stylus may be damped by a substance such as boiled castor oil. In a modification, Fig. III, the crystals act on a plate 14 hinged at 16 and acted on by a spring 15, the roller 136 being dispensed with. One or three crystal rods may be used instead of two. The rods may act on the diaphragm of a loudspeaker of the type described in Specification 650,769. Specifications 298,904, 323,502, [both in Class 40 (iv)], and 650,808 also are referred to.
GB352650A 1950-02-11 1950-02-11 Improvements in electrical sound recording and reproducing apparatus Expired GB686777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB352650A GB686777A (en) 1950-02-11 1950-02-11 Improvements in electrical sound recording and reproducing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB352650A GB686777A (en) 1950-02-11 1950-02-11 Improvements in electrical sound recording and reproducing apparatus

Publications (1)

Publication Number Publication Date
GB686777A true GB686777A (en) 1953-01-28

Family

ID=9759989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB352650A Expired GB686777A (en) 1950-02-11 1950-02-11 Improvements in electrical sound recording and reproducing apparatus

Country Status (1)

Country Link
GB (1) GB686777A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997548A (en) * 1958-05-27 1961-08-22 Vries Machiel De Pick-up
US3026382A (en) * 1958-03-08 1962-03-20 Philips Corp Transducing device
US3054862A (en) * 1959-04-06 1962-09-18 Vm Corp Pickup cartridge
US3102171A (en) * 1958-10-31 1963-08-27 Rca Corp Monophonic-stereophonic phonograph cartridge
US3178520A (en) * 1957-10-29 1965-04-13 Ronette Piezo Electrische Ind Binaural pick-up cartridge
US3201527A (en) * 1958-03-08 1965-08-17 Electroacustic Gmbh Phonograph pickup for grooved records
US3215785A (en) * 1958-12-23 1965-11-02 Astatic Corp Stereophonic piezoelectric pickup cartridge
US3309469A (en) * 1958-02-27 1967-03-14 Rca Corp Phonograph pickup
US3729898A (en) * 1971-06-01 1973-05-01 Chemical Construction Corp Removal of entrained matter from gas streams

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3178520A (en) * 1957-10-29 1965-04-13 Ronette Piezo Electrische Ind Binaural pick-up cartridge
US3309469A (en) * 1958-02-27 1967-03-14 Rca Corp Phonograph pickup
US3026382A (en) * 1958-03-08 1962-03-20 Philips Corp Transducing device
US3201527A (en) * 1958-03-08 1965-08-17 Electroacustic Gmbh Phonograph pickup for grooved records
US2997548A (en) * 1958-05-27 1961-08-22 Vries Machiel De Pick-up
US3102171A (en) * 1958-10-31 1963-08-27 Rca Corp Monophonic-stereophonic phonograph cartridge
US3215785A (en) * 1958-12-23 1965-11-02 Astatic Corp Stereophonic piezoelectric pickup cartridge
US3054862A (en) * 1959-04-06 1962-09-18 Vm Corp Pickup cartridge
US3729898A (en) * 1971-06-01 1973-05-01 Chemical Construction Corp Removal of entrained matter from gas streams

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