US1933305A - Direct-reading multispeed speedoscope - Google Patents

Direct-reading multispeed speedoscope Download PDF

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Publication number
US1933305A
US1933305A US504307A US50430730A US1933305A US 1933305 A US1933305 A US 1933305A US 504307 A US504307 A US 504307A US 50430730 A US50430730 A US 50430730A US 1933305 A US1933305 A US 1933305A
Authority
US
United States
Prior art keywords
speed
records
record
rows
row
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
US504307A
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English (en)
Inventor
Thomas A E Belt
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.)
General Electric Co
Original Assignee
General Electric Co
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 FR741728D priority Critical patent/FR741728A/fr
Application filed by General Electric Co filed Critical General Electric Co
Priority to US504307A priority patent/US1933305A/en
Application granted granted Critical
Publication of US1933305A publication Critical patent/US1933305A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G01P3/40—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light using stroboscopic means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
    • G11B33/022—Cases

Definitions

  • My invention relates to phonograph apparatus, particularly to stroboscopic speed indicating devices therefor, and has for its principal object the provision of a direct reading speed indicating 5 device of this character tor determining when phonograph records are rotating at the speed proper thereto.
  • a device of this charactenpreviously employed comprises a disk resting on the record and rotated thereby and having marked on its upper surface concen trio rows of stripes or bars, each row consisting of a difierent number of these markings.
  • this disadvantage is obviated by replacing'the rows of bars or stripes on the surface of the disk above de scribed by rows of indicia, such as numbers, words, or distinctive characters, the respective 40 rows of indicia corresponding respectively to phonograph records adapted to be rotated each at a different speed, the system thus providing a direct-reading instrument.
  • Fig. l is a perspective View of a phonograph apparatus in which my invention has been embodied
  • Fig. 2 is an enlarged fragmentary view of the stroboscopic disk shown in Fig. 1 having numbers marked thereon reading the revolutions per minute of a rotating record
  • Fig. 3 is a view of a disk similar to that of Fig. 2 but having words marked thereon identiiying records adapted respectively to be rotated at difierent speeds.
  • a phonograph 1c is shown pro- (Cl. Mm -M) of records 12 one of which 13 is shown as mounted in position for rotation.
  • the plurality of records 12 comprises records which are adapted respectively to be rotated at speeds differing each to each; for example, one record or group of records rotating at 78 R. P. ll L, another at to R. P. M. and a third at 90 R. P. M.
  • a member id preferably a disk, resting upon and rotated by the record 13 and having rows 15 ct indicia thereon which in the disk shown in Fig.
  • the outer row 17 being formed by the radially arranged figures 7 the middle row 13 by the radially arranged figures 3 and the inner row 19 by the radially arranged 9 figures 3
  • a light source in which the light is extinguished each.
  • hall cycle such. for example, as a neon glow lamp, or a high voltage spark apparatus.
  • rows of radially arranged members 2 s and? are replaced by words which serve to identify phonograph records which respectively may or may not be of different manufacture but which in any case are characterized by being adapted to be rotated each at a speed different from that of the others.
  • the work Victor has been written, it being readily understood that when the correct speed, 78 R. P. IVL, for operating a Victor record is reached the words, Victor, constituting this outer row in place of the numbers 2 shown in row 1'? of Fig. 2, will appear stationary under the illuminationion of the periodically varying light source 16.
  • stroboscopic means to determine when a given one of said records is rotating at the speed proper thereto, said means comprising a rotatable element bearing a plurality of rows of words, said element being adapted to rotate in unison with said given record and means to illuminate said words intermittently, the words of each of said rows being identical and different from the words of the others of said rows, the words of a given one of said rows of words corresponding to one only of said records, said words indcating, when a row thereof appears to stand stationary while rotating with the record corresponding thereto, that the record is rotating at the speed proper thereto.
  • a strobescopic system for determining the speed of rotation of a plurality of phonograph records each requiring a diiferent speed of rotation for the satisfactory reproduction of sound therefrom, each of said records being identified by a different word, a member adapted to be rotated by said records, said member having marked thereon a plurality of concentric rows of words, the words of each of said rows being identical, said difierent words of said member being the same respectively as the different words corresponding to said plurality of records.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Recording Or Reproduction (AREA)
US504307A 1930-12-23 1930-12-23 Direct-reading multispeed speedoscope Expired - Lifetime US1933305A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR741728D FR741728A (en(2012)) 1930-12-23
US504307A US1933305A (en) 1930-12-23 1930-12-23 Direct-reading multispeed speedoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US504307A US1933305A (en) 1930-12-23 1930-12-23 Direct-reading multispeed speedoscope

Publications (1)

Publication Number Publication Date
US1933305A true US1933305A (en) 1933-10-31

Family

ID=24005709

Family Applications (1)

Application Number Title Priority Date Filing Date
US504307A Expired - Lifetime US1933305A (en) 1930-12-23 1930-12-23 Direct-reading multispeed speedoscope

Country Status (2)

Country Link
US (1) US1933305A (en(2012))
FR (1) FR741728A (en(2012))

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2646284A (en) * 1950-09-23 1953-07-21 Herbert B Weingarden Record adapter and automatic speed changer
US2736228A (en) * 1956-02-28 hardy
US2985059A (en) * 1956-06-28 1961-05-23 Morgan Dev Lab Inc Phonograph record for praxinoscopic devices
US4225227A (en) * 1977-10-29 1980-09-30 U.S. Philips Corporation Multiple speed stroboscope device
US4582427A (en) * 1983-10-13 1986-04-15 The United States Of America As Represented By The Secretary Of The Air Force Test target for adaptive optics
US4706237A (en) * 1984-10-05 1987-11-10 U.S. Philips Corporation Disc player with strobe light illumination

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2736228A (en) * 1956-02-28 hardy
US2646284A (en) * 1950-09-23 1953-07-21 Herbert B Weingarden Record adapter and automatic speed changer
US2985059A (en) * 1956-06-28 1961-05-23 Morgan Dev Lab Inc Phonograph record for praxinoscopic devices
US4225227A (en) * 1977-10-29 1980-09-30 U.S. Philips Corporation Multiple speed stroboscope device
US4582427A (en) * 1983-10-13 1986-04-15 The United States Of America As Represented By The Secretary Of The Air Force Test target for adaptive optics
US4706237A (en) * 1984-10-05 1987-11-10 U.S. Philips Corporation Disc player with strobe light illumination

Also Published As

Publication number Publication date
FR741728A (en(2012)) 1933-02-18

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