US1671350A - Gramophone - Google Patents

Description

H. J. CULLUM GRAMOPHONE 5 Sheets-Sheet l Filed Jan. 6, 1925 May 29, 1928. 1,671,350

I H. J. CULLUM GRAMOPHONE Filed Jan. 1925 3 ShgeLs-Sheenv 2 V@ f V May 29, 1928. 1,671,350

H. J. CULLUM Y GRAMOPHONE Filed Jan. 6, 1925 5 Sheets-Sheet 3 Patented May 29, 1928.

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HENRY JOHN GULLUM, or LONDON, ENonliNiif enziiviornoNn.

hpplication filed January 6, 1925. Serial No.

This invention refers to improvements in orrelating to grainophones and like sound reproducing machines and it has for its primary object to provide a portable machine of improved and simplified construction and which, whilst being of extremely small overall dimensions, is capable of playing records of large or smallsizes; Now according to the present invention in a portable gramophone or like soundreprodueing machine, I arrange the turntable so that it can he slid or otherwise moved in a horizontal plane in relation to the tone armin order to. render it possible to play records of larger size. In order that the present invention may be clearly understood and more readily carried into effect, it is hereinafter describedv with reference to the accompanying drawings, in

which V 1 Figure 1 is a plan view of a portable gramophone constructed in accordance with the present invention. the said view showing the case opened and the motorboard and turntable in position for playing records ofsmall size; Figure 2 is a substantially similar view to Figure 1 but showing the motor, m0torboard and turntableslid horizontally out towards the front of the ease to enable records of larger size to be played;

Figure 3 isa substantially similar View to Figure 1 illustrating an arrangement in which the turntable is turned radially about a fixed pivot point;

Figure t is a similar view to Figure 3 illustrating an arrangement in which the motor and turntable are guided in parallel slotsin the motor-board.

In carrying the present invention into effeet. the motor (I, and turntable 7) are mounted in a suitable ease or container 0 having a hinged lid (Z and provided with the usual carrying handle 6. The tone-arm is mounted on a hinged platform (7 arranged over one end of a sound amplifving chamber'h adapted to direct the sound waves in an upward direction. The platform 7 is hinged at (7' and adapted to he maintained in its raised or horizontal position when the machine is in use by means of a spring-controlled stay (notshown), and it is limited as regards its upward movement by means of suitable screws or steps i provided at the sides of is mounted on the hinged platform 9 so'that the amplifying chamber h. The tone-arm $97, and in Great Britain February -21, 19243-1 1.1 1 ims? it is capable of being turned about vertical axis in a horizontalplane, and it isvitself formed in two sections f, f andprovidedin its length with a hinge 'or joint giving, an; gularmovement about a horizontal axis,thus

permitting the sound-box 75 to be turned up out of engagement with the record. The ar: ticulated sections fy'fof-the tone-arm are screwed engagement with: each other :but they are prevented fromv complete disengagement by theoff-setarrangement.of the sound box which prevents the one partf beingcompletelyrotated on the other part 1. The tone-arm f, f? is of taper construction and is connected directly by; a lateral flange f at its end f to the metal back platelet" thesound box 70 the connection itself being made by means of screws-m passing throughradial slots (not shown) in the flange f on the end of the tone-arm. f; andengagingthe metal back plate Zofthe sound box'h Thus loosening the 'serewsm a certain amountY of relative rotary movement between the end ofthetone-arm f andthe sound-box'lc is provided for, thus allowing the angular. re-; lationship of the needle to theidi'sc t'o befad-- justed atwill; For storage purposes,- the hinged platform; is adapted to be lowered by pushing in the.springcontrolledstay;

when the platform will fall down about its rear hinged end (7 so that the tone-ar'mff I with the-sound box, when suitably. folded; 1

will be. entirelyaccommodated within the;

sound amplifying-.chamber'h. The lower portion or' wall of this chamber may if; desired be provided with a dent or depression (not shown) adapted toaceommodate the lower bent portion. of the tone-farm and to.

prevent same from movement when the lid d of the casec is'closed. Onitsdiaphragm' or stylus side, the sound-box 7c is provided with a cover-plate n; having a central socketpiece 0 and a suitable slot therethrough (not shown) for the passage of'the stylus arm. The socket-piece 0 on the side of the cover plate a is provided for. engagement with a small bent auxiliary] amplifying horn p which is adapted tobe secured thereto so as to increasethe volume of sound and make up for the otherwise small dimensions of the apparatus. being say 7 lnches in dlameter but the spacing and. shape of'the tone arm 1 f are such that 10 inch records can be, played. the larger sized records overhanging the turntable. v r

In order to render it possible to play a a still greater range of records the motor a and the turntable b may be slidably or adjustably mounted in the case. Tothis end means may be provided forkeeping' the turntable b" in its correct position during transit. In the construction shown in Figures 1 and 2. the motor board 9 is mounted on slides a on the box 0 and is held' frictionally in place by the provision of metal bars 7" on the box 0 which grip the side edges of the motor board at the top. The move ment of the turntable is therefore a forward one, as shown in Figure 2, but it may if desired" be a lateral or sideways movement,

as indicatedfor instance in dotted lines 9.

In this case, however, the slides a would be arranged lengthwise of the box 0.

' In the modified construction shown in Figure 3; the motor a, turntable b and motor-board gare arranged to swing upon a pivotal centre 8 which may be formed by the shoulder or seating of the time indieator pliate'. This fitment permits of the motor a, the turntable b and the motorrangement is such that the winding spindle of the motor comes opposite to a winding key hole d in thecase 0 when it is in its winding position. The sound chamberhmay be placed atthe right hand side of the mach'ine, as shown, or the left-hand side of the machine by reversing the position of the motor and the direction of the motor movemerit, or at the back of the machine. The motor'm'ay then when pushed over into its central position rest in a convenient position with'the turntable I) or the motor board Q overlapping thesound chamber, but. givi-ng just sulficient room for the tonearm f f to lodge alongside or underneath the turn table edge. The lid of the box or container shown in Figures 1 and2 comprises a strongly made framework of the same size as the bottom container which is hinged at d in the usual lid fashion to the back of the case a. Y

that I claim is 1+- l 1. In a portable gramophone, a turn table, a tone arm, a means to permitadjustment of the turn table relative to the tone arm, said means permitting the turn table to remain playing of a record; a

2. In a portable gramophone, acasing, a tone arm mounted therein. a turn table,a means for supporting the turn table in the casing to permit bodily movement 'ofthe turn table relative to the tone arm,.said turn table supporting means permitting'the turn in any position of adjustment du ringflthe table to be held in any ofits positions relative to the tone arm during the playing of a record.

3. In a portable gramophone, a casing, a motor board therein, a motorv carried by the n'rotor board, a turn table carried by the motor board. means for movablsy supporting the motor board to permit it to be moved together with the turn table relative to the tone arm.

I 4:. In a portable gramophone, a casing. a

tone arm: carried thereby, and atuii-n'table mounted for bodily slid'able movement inthe casing to adjust the turn table relative to the tone arm. i I

5. In a, portable gramophone, a casing, a. tone arm carried thereby, a motor oard, a motor carried by the. motor board, a turn table carried by the motor ,board, and means for mounting the motor board in the casing to permit sliding movement of said board with the motor and turn table to. thereby" adjust the turn table relative to the tone ELI'III.

signed my name.

HENRY JOHN oUL LUM;

In testimony whereofI have hereunto;

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