US2418651A - Optical device for indicating correct operating speed of phonograph turntables - Google Patents

Optical device for indicating correct operating speed of phonograph turntables Download PDF

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Publication number
US2418651A
US2418651A US551565A US55156544A US2418651A US 2418651 A US2418651 A US 2418651A US 551565 A US551565 A US 551565A US 55156544 A US55156544 A US 55156544A US 2418651 A US2418651 A US 2418651A
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optical device
operating speed
correct operating
indicating correct
record
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Expired - Lifetime
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US551565A
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Milton R Mausshardt
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Individual
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    • 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

Definitions

  • This invention is a speed indicator or gauge for phonographs, by means of which an operator of the phonograph may be visually apprised that the speed of rotation of the turntable is not less than that required for proper reproduction of the record being played.
  • the invention comprehends a visual gauge or indicator to be applied to phonograph records and of such character that when the turntable has reached a speed of rotation suitable for proper reproduction of the record the gauge or indicator presents a band of predetermined color or density.
  • a further object is to provide a device for the purpose which may be made as a separate element adapted to be associated with any record being played as may be desired.
  • Fig. 1 on the drawing is a top plan view of the device.
  • Fig. 2 is an edge view of the same.
  • the device comprises a 1abel of circular disc form of thin cardboard or the like and gummed on its underside for attachment to a phonograph record.
  • the disc is provided with a central hole 2 to coincide with that in the record, so that the disc may be properly disposed centrally of the record.
  • the disc I is provided with a peripheral dark colored band 4 (preferably black for good contrast) with distinctive radial bars 3 across the band intermediate its outer and inner peripheries. These bars are preferably colored white and are of a length slightly less than the width of said band.
  • the bars 3 When the disk is attached to a record and the latter is rotated, the bars 3 will appear to the eye as a continuous substantially gray annular band bordered by concentric bands of a darker color if the speed of the record is not less than that required for a proper reproduction of the record.
  • a speed indicator of the character described comprising a circular disk-like body having a central opening therein so positioned to coincide with the central opening of a disk containing a sound track, and an adhesive on the underside of said body, the top surface of said body having a circular band of dark color thereon concentric with said opening, said band being interrupted. by a circular series of radially disposed bars of a lighter contrasting color, the length of the respective bars being less than the width of said band, so that during rotation of said disk at a predetermined minimum speed, said bars will assume the appearance of a lighter colored band superimposed upon and contrasting with said darker band.

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  • Optical Recording Or Reproduction (AREA)

Description

April 8, I94 M. R. MAUSSHARDT 5 OPTICAL DEVICE FOR INDICATING CORRECT OPERATING SPEED OF A PHQNUGRAPH TURNTABLE Filed Aug. 28, 1944 INVENTOR Mmou a. mussrmnar.
ATTORNEY Patented Apr. 8, 1947 UNITED STATES PATENT OFFICE OPTICAL DEVICE FOR INDICATING COR- RECT ()PERATING SPEED OF PHONO- GRAPH TURNTABLES 1 Claim.
This invention is a speed indicator or gauge for phonographs, by means of which an operator of the phonograph may be visually apprised that the speed of rotation of the turntable is not less than that required for proper reproduction of the record being played.
The invention comprehends a visual gauge or indicator to be applied to phonograph records and of such character that when the turntable has reached a speed of rotation suitable for proper reproduction of the record the gauge or indicator presents a band of predetermined color or density.
A further object is to provide a device for the purpose which may be made as a separate element adapted to be associated with any record being played as may be desired.
Fig. 1 on the drawing is a top plan view of the device.
Fig. 2 is an edge view of the same.
Referring to the numerals of reference on the drawings, the device comprises a 1abel of circular disc form of thin cardboard or the like and gummed on its underside for attachment to a phonograph record. The disc is provided with a central hole 2 to coincide with that in the record, so that the disc may be properly disposed centrally of the record.
The disc I is provided with a peripheral dark colored band 4 (preferably black for good contrast) with distinctive radial bars 3 across the band intermediate its outer and inner peripheries. These bars are preferably colored white and are of a length slightly less than the width of said band.
When the disk is attached to a record and the latter is rotated, the bars 3 will appear to the eye as a continuous substantially gray annular band bordered by concentric bands of a darker color if the speed of the record is not less than that required for a proper reproduction of the record.
I claim:
A speed indicator of the character described comprising a circular disk-like body having a central opening therein so positioned to coincide with the central opening of a disk containing a sound track, and an adhesive on the underside of said body, the top surface of said body having a circular band of dark color thereon concentric with said opening, said band being interrupted. by a circular series of radially disposed bars of a lighter contrasting color, the length of the respective bars being less than the width of said band, so that during rotation of said disk at a predetermined minimum speed, said bars will assume the appearance of a lighter colored band superimposed upon and contrasting with said darker band.
MILTON R. MAUSSI-IARDT.
REFERENCES CITED The following references are of record in the file of this patent:
US551565A 1944-08-28 1944-08-28 Optical device for indicating correct operating speed of phonograph turntables Expired - Lifetime US2418651A (en)

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US551565A US2418651A (en) 1944-08-28 1944-08-28 Optical device for indicating correct operating speed of phonograph turntables

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US551565A US2418651A (en) 1944-08-28 1944-08-28 Optical device for indicating correct operating speed of phonograph turntables

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US2418651A true US2418651A (en) 1947-04-08

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535003A (en) * 1946-09-13 1950-12-19 Gen Electric Gyroscopic instrument
US3204964A (en) * 1964-06-15 1965-09-07 John J Geary Method of demonstrating stroboscopic effect
US4225227A (en) * 1977-10-29 1980-09-30 U.S. Philips Corporation Multiple speed stroboscope device
US4940184A (en) * 1989-03-30 1990-07-10 Fox Valley Systems, Inc. Spraying apparatus with speed indicating assembly
US6499422B1 (en) 2000-09-05 2002-12-31 Grant Petersen Speed indication markings for tires
US20160186986A1 (en) * 2014-12-31 2016-06-30 Gibson Brands, Inc. System and method of direct lighting for a turntable display
US20160186987A1 (en) * 2014-12-31 2016-06-30 Gibson Brands, Inc. System and method of indirect lighting for a turntable display

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2535003A (en) * 1946-09-13 1950-12-19 Gen Electric Gyroscopic instrument
US3204964A (en) * 1964-06-15 1965-09-07 John J Geary Method of demonstrating stroboscopic effect
US4225227A (en) * 1977-10-29 1980-09-30 U.S. Philips Corporation Multiple speed stroboscope device
US4940184A (en) * 1989-03-30 1990-07-10 Fox Valley Systems, Inc. Spraying apparatus with speed indicating assembly
US6499422B1 (en) 2000-09-05 2002-12-31 Grant Petersen Speed indication markings for tires
US20160186986A1 (en) * 2014-12-31 2016-06-30 Gibson Brands, Inc. System and method of direct lighting for a turntable display
US20160186987A1 (en) * 2014-12-31 2016-06-30 Gibson Brands, Inc. System and method of indirect lighting for a turntable display
US9970652B2 (en) * 2014-12-31 2018-05-15 Gibson Brands, Inc. System and method of indirect lighting for a turntable display

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