US2583622A - Brush for phonograph needles - Google Patents

Description

Jan. 29, 1952 w. H. ZIMMERMAN 2583,622

INVENTOR. W/LL/AM H. ZIMMER/MAN AGENT Patented Jan. 29, 1952 UNITED STATE:S PATENT OFFICE 2lsssszz BRUS H FOR PHONOGRAPH'NEEDLES William II. Zimmerman, San Dilago, Calif. Application Aprlli5, 1947, Serlal N0. 739,639 s Claixmi. (01. 274-38) My inventlon relates to a brush for phonograph needles and ehe objects of my invention are: 1

First, to provide a brush combination with long lasting needles such as sapphire point needles for removing abrasive material from records being played by the needles greatly increasing the life of the records and reception therefrom conducted by the needle traversing the same;

Second, to provlde a brush for phonograph needles of this dass which is constantly msiliently loaded providing slight constant pressure of tl1e brush on the record following the needle and overlapping the path thereof so that successive track spirals are pre-cleaned before the needle comes in contact therewith;

Third, to provide a brush for phonograph needles of this dass pivoted directly bo the phonograph needle and Properly insulated therefrom whereby simplicity of installation and improved reception is accomplished;

Fourth, to provide a. phonograph needle brush of this clasgwhich is very simple and easy to install;

Fifth, to provicle a brush of this class which is substantially automatic in is installed;

Sixth, to provide a brush of this dass which automatically compensates for wear of the bristles thereof; and

Seventh, to provide a brush for phonograph needles of this dass which is very simple and economical of construction, efficient; in operation'nd which will not readily deteriorate or get out of order.

With these end other objects in view, as will appear hereinafter, my invention consists of ertain novel features of construction, combination and arrangement of parts a.nd portions as will;be hereinafter describedin detail ancl particula} tly sei; forth in the appended claims, reference being had to the accompanying drawing und to the characters of reference thereon forming a pa.rt of this application in which:

Figure 1 is a sicle elevational view of my brush for phonograph needles shown in connection with a conventional phonograph needle; Fig. 2 is a bottom plan seetional view tanken from the line 22 of Fig. 1 showing portions further b1foken away and in seotion to amplify the Illustration; and Fig. 3 ls a sectional view takn from the line 3-3 of Fig. 1.

Similar charaeters of reference refer to similar parts and portions throughout the several views of the drawing.

The needle I. clip 2, spring 3, brush holder 4 its operation after it and biush 5 constitute the princi pal parts and portions of my brush for phonograph needles.

The needle I is a substantially conventional long life needle having a sapphire point or other long wearing point Ia adapted to engage conventional phonograph records. This needle l is provided with an annular groove l b therein arranged to receive the cli p 2 which is substantially U-shaped as shown in Fig. 3 of the drawing. Engaging this clip 2 at its lower Side is one end of the spring 3. This spring 3 is a coiled spring surrounding the shank portion Ic of the needle I and the lower end of said spring 3 engages the upper side of the brush holder 4, tending to force the same downwardly to the point Ia of Ehe needle I. This brush holder 4 is provided with a surrounding strap portion 4a within which the electrical insulation 4b surrouncls the bristles 5a of the brush 5, and this brush holder 4 is also provided with a bore portion 4c therein slideable over the outside 0f the needle l at its shank portion lc. A shoulder ld is provided on the needle l for retaining the brush holder 4 thereon againsl; compression of the spring 3.

The operation of my brush for phonograph needles is substantially as follows:

The record, as indicated by dash lines A is engaged by the point Ia of the needle I. The upper end of the needle l is secured in connection With a conventional phonograph pick-up head, or the like, and the spring 3 tends to force the bristles 5a of the brush 5 downwarclly on the upper surface of the record A. As the record passeS beneath the needle I, the brush holder 4 pivots on the axis of the record A, whereby the bristles of the brush 5 are in trailing relationship with the point Ia. of the needle I, and substantially overlaps the path thereby, whereby adjacent; spiral pathways of the needle in the record are cleaned prior to engagement of the needle point therewith. It will be noted that this brush 5 removes dust anal other particles from the record such as record shavings and thereby reduces static pickup in connection with the needle 'I. Abrasive materials and other foreign matter are removed from the record by the brush 5, greatly prolonging the life of the record as well as the needle. Constant pressure of the bristles 5a on the upper surface of the record A maintained by the pres- Sure of the spring 3 promotes automatic compensation for wear of the brush 5 and prolongs life of the same. The electrical insulation 4b of the brush holder 4, prevents transfer of static from the brush 5 to the needle I. Thus, reception ls greatly increased by removing statio harnoring dust and foreign matter from the upper surface of the reoord and preventing the transfer of said static from seid brush 120 said. needle. Intimate oontact of the brush being maintained oonstantly at all times by means of the compression spring 3 insures uniformity of Operation end long 1ife of the record, the needle end the brush. In assembling the brush in connection with the needle, the shank of t he needle l is inserted throdgh the bore portion 4c of the brush.

holder 4then the spring 3 'is placed over the shanl; of: the needle l end then the clip 2 is placed. in engagement with the annular groove Ib of the needle I so that, the spring is maintained intermediate seid oli-p 2 and said brus h holder 4 on iphe needle l.

1 brush holder freely pivoted on said needle axially Though I have shown end described a, parfricu-- lar construction, combination end arrangement of parts and portions, I do not wish to be'limibed to this particular constrction, combination, and arrangement; ibutdesire 110 inolude in thesoope of m'y;invention the.construotion combination end arrangement substantially as set .forth in the appended clairns;

Having -thus describedmy. inventionwhat I -cla.im es new end desire to secure by Letters Patentis:

1;: In a brush for phonograph needles ofthe dass described, the coml'1nation of a, needle having a point end, a brush holder fr*eely pivoted on said-;needleexially' thereof end having briStles in connectibn therewith extending in the same direction as saldpolnt end 01 said needle Wherebymovement of a record relatlvely to seid needle ca uses. seid bristlesto-trai1 the point of said needle, and resilient means arranged to force said b1ush holder longitudinally of seid needle toward the point end thereof:

2. Inga brush for phonograph needles of the dass described; the combination of aneedle having a point end, a brush holder freely pivoted on seid needle axially thereofand having bristles in, connection; therewith extending in the same direotion as seid point end oisaid needle Whereby movement of a reoord relatively to seid needle causes seid bristles totrail t-he point of said needle, resilient means arranged to force seid brush holder longitudinally of seid needle toward thgpoint end thereof, and.electarioal ihsulation in connection With said brush holdenadjacetit saidrieedld 3; In a'brush for phonograph needles ofthe classdescribed, the combination of a needle having a point end, a brush holder freely pivoted on said1heedle axially thereof and'havihg bristl'es in connection therewith extending in the same direction assaid point end of seid needle W1181'8? *thereof near the pointed end thereof, bristles in -connection withsaid brush holder adapted brush a record traversed by seid n 'eedle end resilien't m'eans tending to force seid brush holder toward the pointed end of seid needle.

5. Ir1'a brush for phonograph needles of the clas's* described, the combination of a. conven tional lang life needle having apointed end, a .brush holder. frjeely pivoted on seid needle axially there'of riedr um pOinted end thereof, bristlesin conneotion Withs aid brush holder adaptedto bru sh a record traversed by seid needle, resilient means tending to force seid brush holder towa rd the pointed end of seid rieedle, and insulation material in co1mecti0nWith seid brush'holder engaging said'heedle for preveriting the'donduotion of static from said bristl s 015 seid brush 'to said needle. j

A6. Ir1i zy1brush f0r phondgraph n-eedles ofthe dass described the combi'nationof a needle'having a point .e'nd, 21 brush holder freely pivoted to said needlebrush bristles in seid holder exty'ending in the same direction aS said pointend of said'needle; end resilient meansfor moving seid bristles toward a phonographrecord end relative to seid hedle the brush trailing said needle. WILLIAM H. ZIMMERMAN. i

REFERENCES CI'IED The following're ferehokas are of record inthe file of this patent:

UNITED STATES PATENTS 887,939 France Nov. 26 19 43

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