US825065A - Sound-reproducing disk for gramophones. - Google Patents

Sound-reproducing disk for gramophones. Download PDF

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Publication number
US825065A
US825065A US25621905A US1905256219A US825065A US 825065 A US825065 A US 825065A US 25621905 A US25621905 A US 25621905A US 1905256219 A US1905256219 A US 1905256219A US 825065 A US825065 A US 825065A
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disk
sound
gramophones
reproducing disk
laces
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Expired - Lifetime
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US25621905A
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Achille Maitre
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material

Definitions

  • A, first ohjeetiwhich is attained by this special formation oiC the disk-laces is to enable the dislq to be used on eac-h of its two laces, with tlieellect ofen ebling thereeeiving-stylus lo follow more easily the spiral grooves, owing to the inclination ol' the grooved parts, und at thesnine time to diminish the friction thereof,
  • the disk is pro- 'ided upon both laces with spiral grooves lor the. purpose ol renrcmlucing two aire, 'them laces being inclined to Vlorin emrli :L Worlii eurfeee in the l'orni oi u truncated cone.
  • This inelinzitiiim o1 both the d' ecce is er waged in :umh :i manner that ne third-:nose yof the disk in its g ooved mrt dini'inielieri gritdueilj, Yl'roin the point .1.1y lo the periphery l), whereby the disk possesses in its middle ex-lion relatively great thivltnes lier lioth ⁇ Werl/ing faces of the disk the renrodueir g--Stylns will travel from the inner end el the epirol toits eurer end.
  • the disk of my invention is intended to he mounted upon a. stationery shalt which een.
  • Yilhot .l claim is- An improved sound-reprodueing disk for grainophones, having each of its two lacet: constructed e spirzilly-grooved working surface in the lorin ol ⁇ si, truncated eolie,v the thickest portion el the disk being elthe cere ler Sind the thickness diniinisnin toward the periphery, so es to provide. Strength and. stillness.

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Description

Ul?? SlATES- WTVZERLAND.
Specification or" Letters Patent. Application filed April 18,1905. Serial No. Zll).
'Patented July 3, 1965.
dish' luis each of its two .levee constructed as e spirall \'groo\'ed working surface in the forni ol a truncated cone.
A, first ohjeetiwhich is attained by this special formation oiC the disk-laces is to enable the dislq to be used on eac-h of its two laces, with tlieellect ofen ebling thereeeiving-stylus lo follow more easily the spiral grooves, owing to the inclination ol' the grooved parts, und at thesnine time to diminish the friction thereof,
because the deelivity or inclination of the grooved Working faces ot the disk aids SonieL what in the motion of the receiving-stylus. Another great advantage of this doublecone dis-li consists in that the latter has in its middle portion relatively great thickness,
that iti verysolid and resists well breaking and bending strains, during. its manipulation or under other influences.
ln the accompanying drawings, Figure l represents by way of example the preferred forni of the im )roved `disk in plan View, and Fig. 2 is an e evsition of the seine viewed edgewise,
In the construction shown the disk is pro- 'ided upon both laces with spiral grooves lor the. purpose ol renrcmlucing two aire, 'them laces being inclined to Vlorin emrli :L Worlii eurfeee in the l'orni oi u truncated cone. This inelinzitiiim o1 both the d' ecce is er waged in :umh :i manner that ne third-:nose yof the disk in its g ooved mrt dini'inielieri gritdueilj, Yl'roin the point .1.1y lo the periphery l), whereby the disk possesses in its middle ex-lion relatively great thivltnes lier lioth `Werl/ing faces of the disk the renrodueir g--Stylns will travel from the inner end el the epirol toits eurer end.
The disk of my invention is intended to he mounted upon a. stationery shalt which een.
only perform rotary motion around its geo-v metrie axis.
Yilhot .l claim is- An improved sound-reprodueing disk for grainophones, having each of its two lacet: constructed e spirzilly-grooved working surface in the lorin ol` si, truncated eolie,v the thickest portion el the disk being elthe cere ler sind the thickness diniinisnin toward the periphery, so es to provide. Strength and. stillness.
In Witness whereof il have hereunto signed my nzune, this -lth day ot' April, 1905` in the presence of two suheorihing wither es,
AVCHUJLFI iylATllE "With esses zV Gino. Ginrrlmn, AMAND BRAUN.
maximum
US25621905A 1905-04-18 1905-04-18 Sound-reproducing disk for gramophones. Expired - Lifetime US825065A (en)

Priority Applications (1)

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US25621905A US825065A (en) 1905-04-18 1905-04-18 Sound-reproducing disk for gramophones.

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US25621905A US825065A (en) 1905-04-18 1905-04-18 Sound-reproducing disk for gramophones.

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US825065A true US825065A (en) 1906-07-03

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2846230A (en) * 1954-04-29 1958-08-05 Rca Corp Phonograph record
US2913246A (en) * 1954-04-19 1959-11-17 Ibm Magnetic recording surface
US6801387B1 (en) * 2000-04-14 2004-10-05 Seagate Technology Llc Control flow instability to reduce disk flutter and half frequency whirl

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913246A (en) * 1954-04-19 1959-11-17 Ibm Magnetic recording surface
US2846230A (en) * 1954-04-29 1958-08-05 Rca Corp Phonograph record
US6801387B1 (en) * 2000-04-14 2004-10-05 Seagate Technology Llc Control flow instability to reduce disk flutter and half frequency whirl
US20050057850A1 (en) * 2000-04-14 2005-03-17 Seagate Technology Llc Control flow instability to reduce disk flutter and half frequency whirl
US7630166B2 (en) 2000-04-14 2009-12-08 Seagate Technology Llc Control flow instability to reduce disk flutter and half frequency whirl
US20100046114A1 (en) * 2000-04-14 2010-02-25 Rahman Mohamed M Control Flow Instability to Reduce Disk Flutter and Half Frequency Whirl

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