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GB502445A - Improvements in piezo-electric recording and reproducing devices suitable for use in dictating machines - Google Patents

Improvements in piezo-electric recording and reproducing devices suitable for use in dictating machines

Info

Publication number
GB502445A
GB502445A GB12127/38A GB1212738A GB502445A GB 502445 A GB502445 A GB 502445A GB 12127/38 A GB12127/38 A GB 12127/38A GB 1212738 A GB1212738 A GB 1212738A GB 502445 A GB502445 A GB 502445A
Authority
GB
United Kingdom
Prior art keywords
piezo
devices suitable
reproducing devices
electric recording
dictating machines
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
GB12127/38A
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.)
Dictaphone Corp
Original Assignee
Dictaphone Corp
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 Dictaphone Corp filed Critical Dictaphone Corp
Publication of GB502445A publication Critical patent/GB502445A/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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/02—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using cylindrical record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/06—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using web-form record carriers, e.g. tape

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Recording Measured Values (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Stringed Musical Instruments (AREA)
  • Studio Devices (AREA)

Abstract

502,445. Phonographic recorders or reproducers ; piezo - electric crystals. GEE, H. T. P. (Dictaphone Corporation) Sept. 21, 1937, No. 12127 /38. Divided out of 502,423 under which a Specification was laid open to inspection under Sect. 91 of the Acts, April 6, 1938. Drawings to Specification. [Glass 40 (iv)] [Also in Group XL] A recorder-reproducer device has one or more piezo-electric crystal plates placed between electrodes and so supported between the walls of a casing as to have one corner free to moye. A substantially rigid connection is made between the movable corner of the plate and a lever arm carrying recording and reproducing styli.
GB12127/38A 1936-10-05 1937-09-21 Improvements in piezo-electric recording and reproducing devices suitable for use in dictating machines Expired GB502445A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US103960A US2143819A (en) 1936-10-05 1936-10-05 Dictating machine
US194807A US2181437A (en) 1936-10-05 1938-03-09 Dictating machine

Publications (1)

Publication Number Publication Date
GB502445A true GB502445A (en) 1939-03-17

Family

ID=26801032

Family Applications (2)

Application Number Title Priority Date Filing Date
GB25596/37A Expired GB502423A (en) 1936-10-05 1937-09-21 Improvements in dictating machines
GB12127/38A Expired GB502445A (en) 1936-10-05 1937-09-21 Improvements in piezo-electric recording and reproducing devices suitable for use in dictating machines

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB25596/37A Expired GB502423A (en) 1936-10-05 1937-09-21 Improvements in dictating machines

Country Status (4)

Country Link
US (2) US2143819A (en)
CH (1) CH203475A (en)
FR (1) FR827478A (en)
GB (2) GB502423A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586362A (en) * 1949-03-11 1952-02-19 Magnavox Co Dual point phonograph pickup stylus
DE936653C (en) * 1951-03-22 1955-12-15 Electroacustic Ges M B H Pickup systems on speaking machines
DE967840C (en) * 1951-03-22 1957-12-19 Electroacustic Gmbh Stylus with one or more stylus carrying leaf spring for pickups

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485137A (en) * 1944-10-30 1949-10-18 Brush Dev Co Connection means for phonograph pickups
US2545652A (en) * 1945-07-11 1951-03-20 Edison Inc Thomas A Phonograph recorder and reproducer
US2547227A (en) * 1948-11-09 1951-04-03 Philco Corp Phonograph pickup having a quadrilateral crystal with only one corner free to flex
US2634336A (en) * 1949-02-09 1953-04-07 Magnavox Co Dual stylus phonograph pickup
US2670407A (en) * 1949-02-17 1954-02-23 Magnavox Co Drive system for crystal pickups
US2681388A (en) * 1949-03-03 1954-06-15 Columbia Broadcasting Syst Inc Phonograph pickup
US2575999A (en) * 1949-05-18 1951-11-20 Astatic Corp Piezoelectric phonograph pickup

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2586362A (en) * 1949-03-11 1952-02-19 Magnavox Co Dual point phonograph pickup stylus
DE936653C (en) * 1951-03-22 1955-12-15 Electroacustic Ges M B H Pickup systems on speaking machines
DE967840C (en) * 1951-03-22 1957-12-19 Electroacustic Gmbh Stylus with one or more stylus carrying leaf spring for pickups

Also Published As

Publication number Publication date
US2181437A (en) 1939-11-28
US2143819A (en) 1939-01-10
FR827478A (en) 1938-04-27
GB502423A (en) 1939-03-17
CH203475A (en) 1939-03-15

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