US1886228A - Phonograph - Google Patents

Description

Nov. 1, 1932.

B. ROBERTS 1,886,228

PHONOGRAPH Filed March 13, 1930 2 Sheets-Sheet 1 INVENTOR.

ATTORNEYS.

Bee sham Ruber'Ts 5 1932- B. ROBERTS 1,886,228

' PHONOGRAPH Filed March 15. 1930 2 Sheets-Sheet 2 INVENTOR.

EIE'Echam R a]: Er-Ts ATTORNEYS.

I ducing mechanism,

Patented Nov. 1, 1932 UNITED STATES PATENT OFFICE nnnormm nonna'rs, or none, JAPAN rnouooaarn Application filed March 18,

- to be disposed in a compact cooperative rela tionwithout the super-position of parts upon the record.

Other objects and advantages of this invention will be apparent during the course of the following detailed description.

In the accompanying drawings, forming a part of this specification, and wherein similar reference charactersdesignate corresponding parts throughout the several views,

Figure 1 is a plan view of a phonograph, showing in dotted lines the relationof a tone arm and its reproducing mechanism with respect to, an inverted standard record'positioned for rotation in a counter clock-wise direction.

Figure 2 is a plan view of the turn table rection in which the same rotates, and itsrelation to a tone arm and reproducing mechamsm.

Figure 3 is a side elevation showing the relation of tone arm, turn table, and reprowhich the parts normally assume in the absence of a record. a

Figure 4 is a side elevation of the parts of Figure 3.in the relation which they assume during the playing of a record.

In the drawings, wherein for the purpose of illustration is shown only a preferred embodiment of the invention, the letter A may generally designate a phonograph, which may include a turn table B supported upon a shaft C for rotating in a counter clock-wise direction, and adapted to receive thereupon an inverted standard record D. The tone arm F is mounted upon the phonograph A in an improved relation with respect to the, turn table B, and the same has reproducing or pick-up mechanism G associated therewith.

. body 20, downturned 1930. Serial a... 485,564.

The phonograph A, of course,'includes a cabinet or supporting frame having a top wall 11, through which the motor operating shaft extends normal thereto. The motor (not shown) is positioned within the phono- 5e graph cabinet, or another location, and it is adapted to rotate the shaft 0 counter clockwise. The turn table B is of very small diameter, normally equal to-the diameter of the label portion of the standard record, and it to is placed in a predetermined spaced relation with respect to the top Wall 11 of the phonograph, so that. the tone arm F and the reproducing mechanism G may he placed be neath a record D supported for rotation upon at the turn table B.

The tone arm F includes a swingable arm at an end 21 and pivoted on a fixed axis at 22 on the top wall 11. The body at the fore end thereot is its opposite end the curved. tone arm portion 23 1s provided with a. usual reproduceror pick-up box G, having a stylus 27 thereupon normally facing upward. The swiveled end portion 23 of the tone arm structure iscoun-= 0.. terbalanced by a weight30, secured upon an arm 31 which is attached at 32 upon an end adjacent the pivot mounting of the arm portion 23 with respect to the body 20, as shown in Figure 2. The weight 30 of course extends to the opposite side of the pivot axial mounting of the portion 23 with respect to the reproducer mechanism G and the weight 30 normally moves the reproducer box G upwardly to position the stylus 27 in an upward bearing relation against a. record D supported upon the turn table B. A stop bracket, member or finger 40 is mounted upon the tone arm body 20 in position to engage the weight 30 and limit the downward movement there of, so that when a record is not upon the turn table B, the weight 30 will be'supported thereby in a position so that the weight will lift the stylus 27 of the reproducer G to a position projecting, at its pointed end, slightmentioned upon the turn table;

is no obstructingmechanism above the record D when positioned upon the turn table. The phonograph does not need a special record,

' and the relation of parts has been provided to facilitate the playing of standard records, in such manner that the record may be placed upon and removed with respect to the mechamsm not only with the least possible manual effort, but without liability of breaking the record, by hitting against the tone arm structure which normally overhangs the top of the record on the conventional phonograph. In order to adapt the device for playing of conventional records the turn table has been made to turn in a counter clock-wise direction and to effect the playing, the tone arm is swung to approximately its starting position, as shown in Figure 1, and the record is placed with the sound grooved face which it is desired to play facing downwardly. The stylus is arranged to come in the outer peripheral starting portion of the groove of the record being played, and ofcourse the reproducer box moves inwardly towards the central portion of the record during play, It is really only necessary to swing the tone arm to, position according to the size of the record being played, and place the .record in the relation The stylus will enter the sound groove, due to the projection of the pointed endthereof above the normal top surface of the turn table, and i the weight counter-balances the arm 23 and reproducer box G so that only the suiticient amount of pressure of the needle against the record is brought to bear, to prevent ec-. centric Bositioning of action of the rotating record Various changes in the shape, size, and arrangement of parts mav be made to the. form of invention herein shown and described, without departing from the spirit of the invention or the scope of theclaims.

' I claim: i

,1. In a phonograph the combination of in supporting frame, a turn table rotatably supported upon the frame, a tone arm swingably mounted upon the frame, and reproducing mechanism operatively mounted upon the. tone arm, said tone arm and reproduc-\ mg mechanism being so related to. the turn table that when a. record is o eratively 85 supported upon the turn table tie reproface of the record. with ing mechanism is in ducing mechanism will pla on the lower t e atter havin at all times all of the tone arm and repro ucing details thereunderneath.

2. In a phonograph, the combination of a frame, a turntable rotatably supported -the reby, a. phonograph record supported upon said turn table and projecting outwardly beyond the outermost edge of said turn table, and reproducing mechanism upon the frame,

engaging the underside of said record,

wholly beneath said record and within the limits defined by the circumferential plane of said record when said reproducing mechanism is in an operative position.

3. In a phonograph, the combination of a frame, a turn table rotatably supported thereby, a phonograph record supported upon said turn table and projecting outwardly beyond the outermost edge of said turn table, and reproducing mechanism upon the frame, engaging the under side eluding a stylus,.a sound box and a tone arm, wholly beneath said record and within the limits defined by plane of said record when said reproducan operative position.

4. In a. phonograph, the combination of a supporting frame, a turn table rotatabl supported upon the frame, and repro ucing mechanism including a tone arm swingably mounted upon the frame, said reproducing mechanism being so related to the turn table that when a phonograph record is tiv'ely supported upon the turntable, the reproducing mechanism will play on the lower 5. In a phonograph, the comblnation of I a frame, a turn table rotatably supported thereby,

the circumferential operaa "phonograph record supported upof said record, ins

on' said turn table and projecting outwardly beyond the outermost edge of said turn table, and reproducing mechanism upon the frame,

engaglng said record, including a tone arm pivoted to the frame, with the pivot of the tone arm underneath the record so supported.

6. In a phonograph, the combination of a frame, a'turn-table rotatably supported'thereby, a phonograph record supported, upon said turn table, the outermost edge-of said turn table and reproducing mechanism upon the frame, 'enlie and projecting outwardly beyond 1 gaging said record, including a tone arm pivoted to the frame and positioned so that the pivotal axis thereof will always pass thrua record'so supported BEECHAM ROBERTS.

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