US2333079A - Phonograph attachment - Google Patents

Description

Oct. 26, 1943. 3 H. ZURSTADT 2,333,079

PHONOGRAPH ATTACHMENT Filed March 28, 1942 31 won K on Helena Zzznstaot wow,

Patented Oct. 26, 1943 UNITED STATES PATENT OFFICE PHONOGRAPH ATTACHMENT nei na iurstadt, Baltimore, Md. I Application March 28, 1942; Serial No. 436,661 lC laiin. (o1.274 1 The invention relates to a phonograph-attachment constituting a record theme guide."

The object of the present invention is to provide for phonographs an attachment adapted to be arranged directly uponthe topof arotating sound record'disk of a musical composition and extending from the center to the periphery thereof and provided with a plurality of straight needle receiving slots extending radially across grooves of a the sound record disk and permitting the needle of the tone arm of the phonograph to extend through them a'ndoperate'in the'grooves of the sound record and play selected portions of a symphony or other musical composition to enable a lecturer or anindividual student of music i.

in a course-of musical instruction to makean analysis of a musical composition such as a symphony and isolate and play the introduction, the numerical succession of thethemes, the episode, the coda link-passages, recapitulation and'other musical features of the sections of the movements of a recorded symphony "by simplyplacing theneedle of the tone arm of the phonograph in slots of the record diskor phonograph attachment and playing the desired isolated portions of the sound recordings. 1 J

A further object of the, invention is to provide for phonographs a disk attachment of a size substantially coextensive with a musical sound record disk and having a central circular opening to receive the spindle of the turntable of the phonograph and divided into sector-shaped areas, each associated with one of the movements of a symphony and with a sound record thereof and provided with musical feature needle receiving slots, whereby the disk of the present invention will isolate sections of the sound record and enable a lecturer to make a complete analysis of an entire symphonyby means of a single record disk attachment, if the symphony is not of unusual length, it being only necessary to change the disk adapted to beplaced on top of a phonograph sound record and constructed for analyzing BeethovensSymphonyNo. 1.

Referring'to the drawing, in which is illustrated one embodiment of the invention, I designates a disk-shapedrhember consisting of a disk of thin sheet materialand preferably of a size sufficient to cover substantially a sound record and adapted in "use. to be placed upon the top of the same when the'sound record is arranged on the turntable of a phonograph for playing in the usual manner; Any suitable thin sheet material may be used; drawing paper has been found very satisfactory for making record disks, as it is sufiiciently thin and possesses the necessary stillness. As the disk attachment is placed directly on top of and is supported by a sound record disk comparatively light sheet material may be used. l l

The disk which' is provided with a central spindle receiving opening 2, is constructed for analyzing Beethovens Symphony No. 1, recorded on Victor records Nos. 7211 to .7214, inclusive, and composed of four movements, each recorded on one of the saidVictor records. ,Thev disk Iris-divided byfour radial full lines 3 into-four sectorshaped areas 4, 5, 6 and 1 or segments which are tion and arrangement of parts hereinafter fully described, illustrated in the accompanying drawing and pointed out in the claim hereto appended, it being understood that various changes in the form, proportion, and minor details of construction, within the scope of the claim, may be resorted to without departing from the spirit or sacrificing any advantages of the invention.

In the drawing the figure is a plan view of -a subdivided by broken lines 8 into sector-shaped sections 9. Each of the sector-shaped areas 4, 5, 6 and 1 provides ample space for the needle receiving slots, hereinafter specifically referred to, for isolating the musical features of one movement of the musical composition and the sectorshaped sections 9 of the area 4, 5, 6 and 1 contain the needle receiving slots of the difierent sections of each individual movement. each sector-shaped area covers one movement of the symphony and the subdivisions 9 thereof ,cover the difierent sections of each movement.

The full lines 3 preferably extend from the periphery of the disk to the central opening 2 thereof while the broken lines terminate short of the center of the disk, but the divisions of the disk I may be indicated in any other desired manner.

The four main divisions cover the four movements of the symphony. The first sector-shaped areal covering the first movement of the symphony is provided with three subdivisions. The first subdivisioncontaining the needle receiving slots I0, H, 12, I3, l4, l5, I6, I! and I8 is entitled Exposition, and is the first section of the first movement of. the symphony. The slot 10 isolates the introduction, slot ll theme No. 1, slot l2 the episode, slot 13 theme No. 2, slot 14 exten sion theme No. 2, slot 15 closing theme, slot It In other words,

I areas 5, 6 and I Will be subdivided as indicated by the broken lines 3 which in practice may be solid red lines orlines of any other distinguishing character and the subdivisions will-be provided with slots appropriate to the sections of the sec- 0nd, third and fourth movements .ofthe sy phony.

The slots are straight and are radially arranged an When-th isk at a hment is p aced-upon theltop ofa' soundrecord and the needle of the tone arm of the phonograph-is placed in Due .of

the slots it will operate in ,theiordinaryma-nner in t es o v s tr e sed and expose by said slot. While any ordinary needle nay :be used it is preferable tousea needle having a floating'point, and sold on the market under the Trade-Mark Fidelitonef as it :has been found that such need-1e Will not injure the end walls of the slots ,ofa-thin paper-idisk. r

It will be seen that when the record disk is are ranged upon a sound record with the spindle of the turntable extending: thr u h the. cent l opening'tland the needle of the tone armor-the ph no raph placed in .one .of the slots, the-record disk .I will remain stationary and the sound rec .ord disk will rotate with the turntable. The needle is placed in the slot at the outer end thereof and will continue playing the record until it reaches the-inner end of they-slot and when the tonearm is removed, the playing will cease.

matter recorded on a phonograph sound record. The needle may be readily transferred from one slot to another Without removing the record disk from the sound record.

While the record disk I shown in the drawing is adapted to analyzing and explaining a symphony, it will be apparent that the slots may be arranged for isolating the musical features or distinguishing characteristics of any other form .of musical composition and will enable the laymanto study the form or construction of the composition through the use of a phonograph record and a miniature orchestral score or a form outline that links the phonograph record and the diskfwr.

What is claimed is:

"A phonograph attachment constituting a record theme guide for analyzing musical composi- The slot isolates the .desired section of the phonograph recording, and the straight radial slots tions for imparting musical instruction and consisting of a disk of thin sheet material of subtant allythe size of a sou d: re ord and-provid with a central repell ng to receive the spindle of he turntable of a; phono raph and adapted to :be placedup n the t p ofv a sound record, said disk j-loeing divided into a plurality of sector a ed segments and p ovided a in; said segments withistraight .pradial'slots circumferentially spaced and havin ,a combined length to traversezsub- Sta/111 134113 all'of. the convolutions of the spiral cgro ivle'of a sound record and each segment 'ing the "disk fromithe sound record to play suc' .cessively and repeatedly all of the isolatedportions of thesound record' 1 HELENA zURs'rAn'r.

Images