US1215744A - Vibration-governing device for sound-reproducing machines. - Google Patents

Description

W. J'. TANNER. VIHHATN GVEHNNG [lli-HCE FUN SUNB REPRUDUGING MACHKNS.

MF'LIEATlON FILED HW. 9| 1914.

1,21 5,74%:; Patented Feb, i3, 19171 y i 'STATES 4APATEirrinunon.

WILLIAM J'. TANNER, OF BRIDGEPORT, CQNNECTCUT.

VIBRATIUN-'GOVERNING DEVICE FOR S0UNDIRJEIPROLDUCI1`l G MACHINES.

Specification of Letters Patent.

Paten ted Feb. 13, 1917.

Application filed January 9, 1914. Serial No. 811,205.

To all 'av/wm t may concern:

lic it known that I, WILLIAM J. TANNER, a citizen of the United States, and resident of Bridgeport, in the county of Fairfield and State ofConuecticut, have invented certain new and useful Improvements in Vibration-Governing Deyices, for .Sound licproducing Machines, of which the following' is a specification.

The invention consists of a device or attachment aiplicable to sound reproducing machines oil various types but it is particullarly useful with machines employing disk records. The object of the invention is to provide means for obviating the disadvantages caused by excessive vibration of the slylus holder of thc rcproduccr :forming part of machines of this kind.

The improved device may permanently be a part of the reproducer or it maybe in the form of an attachment capable of being detachably secured to reproducers of various kinds employing a stylus carried by a 'holder'. the latter having' independent vibratory movement relatively to the main part of the reproducen Tn accordance with the invention` the dc vice or attachment consists essentially of an arm suitably secured to the reproducer, and at the tree' end of the arm, a floating weight is carried. This weight is solid or `it may be' made hollow and to contain a liquid or a movable' body. mercury preferably being employed. With either construction, the weight may be adjustably carried on the arm, which arm is secured to the stylus or needle holder, this holder heine,rv

mounted in a carrier generally so attached to ,the casing of the reproducer that, to a limited extent, the carrier is allowed inde` pendent vibrating movement relatively to the reproducer casing.

The invention will be described in several forms hereinafter with reference to the accompauyingir drawings in which Figure 1 is alu elevation of a complete reproducer with the improved device or attachment secured thereto;

Fig. 2 is a section taken on line (L -o of' Fig. 1, looking in the directiony of the arrow;

Fig. 3 is a section taken on line i-71 of Fig. 2 lookinnin the direction of the arrow;

Fig. 4 shows part of the tcproducer in elevation and a. solid weight il'i section, and

Fig. 5 shows a modified means for' securcarrier 3; 4 is an arm romposed of wire, re-4 i silient but not sensitivi to slight vibration.

The weight 5, carried :t the end of the arm -L is in the `t'orm of a (losed cup containing a movable body, for example mercury. The arm i is secured to the holder 2 by means of the frame (3 secured to the holder by set screw 7. the fri me being slotted or cut away at 8 to clear the needle set screw Si. ri`he weight is screw threaded to the curl oi the arm in order that the weight may he adjusted to moet the requirements.

The purpose of thc im )roved device is to eliminate the objectionable scratchin vor rasping sounds caused by excessive vi ra.- tion of the needle togedier with the parts4 adjacent thereto. This undesirable vibra.- tion prevents the needle point from always following the record groove exactly. Con sequently an imperfect tane is produced and the lite of the record is shortened owing to the wearing away of the walls of the groove. Tith the improved devi( e a governing el'ect is obtained and this ef'ect is imparted to the vibrating stylus helder of the reproducer, the greaterY vibi 'ations being governed by the resiliency ff the arm carrying the weight and the less n' vibrations'being governed h v the movabfe body within the hollow weight. By me: ns of this governing o'lfcct any vibration cf the needle holder is controlled. i

Fig. 4 illustrates a m( Lliiied form of the invention, in which instance the weight 5 is solid and the arm 4 is composed of a fiat spring sutiiciently resi-lier t so as to be sensitive to any vibration of the needle holder. Fig. 5 illustrates an alternative method of securing the weight carrying arm direct to the reproducen In this instance the end of the arm is screw threadedl and fitted in a threaded hole in the neelle holder2 or if desired the arm may be a ;tached to the cai-- rier 3.

l am aware it has heietofore been proposed to employ a vai-iet) of forms of governing devices for sound reproducing machines, such devices havin.: a rigid arm provided with a counter balance weight and carrying the stylus or the arm is connected to the stylus holder. The arm is pivoted or' otherwise mounted in each instance, so that its movement is partly constrained, but according to my invention, the arm is resilicnt, therefore, the Acounterlmlance Weight has u floating or universal movement whereby the vibration is more e'ectually controlled, particularly lateral vibration, which causes most of the bad effects hereinbefore mentioned. v

I 'claim- 1. In a sound reproducer for machines of the class, described, a vibrating stylus holder, an'nrm secured thereto and a welght containing a movable body carried by said arm.

2. In a sound renroducer for machines of the class described, u vibrating stylus holder, an arm secured thereto and an adjustable weight containing a movable body carried by said arm.

3. In a sound reproducer for muchines of the class describ ,a vibrating stylus holder a resilient arm secured thereto and by -sald arm.

Si ed at Bridgeport, in the county, of Fair i eld and State of Connecticut.

y WILLIAM J. TANNER.

Witnesses:

HELEN E. TANNER, MINNIE L. TANNER.

-a Weight 'containing a movable body carride'l

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