US1458580A - Portable gramophone - Google Patents

Description

June l2, 192.3.

1,458,580 H. c. KING PORTABLE GRAMOPHONE Filed May l, 1922 Fia/f' v o tures by constructing my gramophone so Patented June 12, 1923.

PATENT crnica.

HERBERT C. KING, 0F TORONTO, ONTARIO, CANADA.

roR'rA'BLE Gnmornonn.

' applicati@ mea may 1,

To all whom t may concer-n.'

Be it known that I, HERBERT C. KING, of the city of Toronto, in the county of York, Province of Ontario, Canada, a subject of the King of Great Britain, have invented certain new and useful Im rovements 1n Portable Gramophones, of whlch the followin is a specification.

his invention relates to that .type of gramophones which when closed may be carried from place to place by the operator,v and my object is to provide a gramophone which will be compact when closed, of neat ap arance and cheap to manufacture.

attain my objects by means of thel constructions hereinafter described and 1l1u s trated in the accompanying drawmgs 1n which- Fig. 1 is a plan view of my gramophone,

with the lid opened Fig. 2 a longitudinal vertical section of the same;

Fig. 3 a similar view to Fig. 2 showlng the lid closed; and

Fig. 4 an end view of the same.

In the drawings like numerals of reference mdicate corresponding parts in the diiferent figures.

1 is a casing provided with a handle 15 and a hin ed lid 2. A motor (not shown) 1s suitab y securedto the bottom of the casing and is adapted to rotate the turntable 3.

The common arrangement for constructing amplifying chambers in portable gramophones is tov close the top of the caslng wlth a ystationa cover underlying the turntable and on w ich the tone arm is mounted. The tone arm extends upwardly higher than the turntable so that the needle, carried by the reproducer which is carried on the free end of the tone arm, may engage the splral groove formed in the record which lies on the turntable.,v When the gramophone is not in use the tone arm and turnable are covered -by means of a hollow lid hingedonthe casing. It' is obvious that with this arrangement the dimensions of "the gramophone,

when the lid is closed, are so great that it is cumbersome and very lawkward to carry.

I lovercome' the above objectionable feathat the tone arm is swung downwardly as the lid 2 is closed thus :permitting the depth of the latter to be yconsiderably reduced.

This is accomplished by providing a motorQ 1922. Serial No. 557,786.

board 4 which covers the amplifying chamber and motor space and hasthe tone armv carrying board 4 hin ed thereon. The tone arm 5 suitably carrie on the tone arm carrying board 4a is adapted to be swung by means of the links 6, having their opposite ends pivotally connected with the movable board 4a and the lid 2, to its operative position andvto its inoperative position as the lid is opened and closed respectively. An upwardly extending hook 17 secured 'to the movable board 4 is adapted to receive the free end of the tone arm. An elbow 7 secured to the underside of the movable board 4a forms a communication between the tone arm and the amplifying chamber 8, this being preferably separated from the motor space by the curved partition 18. A transverse partition 9 forms the rear wall of this chamber and is provided with an openin through which the free end of the elbow projects. Abutment members 19 secured to or formed on the casing are adapted to engage the swingable board 4 to limit its upward movement.

To regulate the volume of the reproduced sounds issuing from the amplifying chamber I provide the pivotally mounted shutters 10 which are well known in the art. To lock these shutters in their closed positions I provide each end of one of the shutters with a projection 11 having an enlargement' 12 formed at its outward end. The projections 11 are adapted to be received in the notches 13 formed in the latches 14 which are pivotally connected with the lid 2 and which are adapted to engage the outer surfaces of the shutters to hold the latter closed. The en-l largements 12 are adapted to frictionally engage the latches 14 and tend to hold the la'tter in engagement with the projection 11 thus locking the shutters and the lid.

To carry a supply of records, the inside of `the lid 2 is provided with an inwardly extending threaded stem 16 adapted to be received in the hole formed in the records. A disk shaped nut is threaded on the stem for holding the records in place.

To reduce the cost of manufacture all the p parts of the casing will' be made of stamped sheet metal.

What I claim as my invention is 1. The combination with a gramophone including a hinged lid and pivotally mounted tone regulating shutters, of means for locking the lid in its closed position and adapted to engage the outer surfaces of the shutters to hold the latter closed.

2. The combination with a. gramophone provided with a hinged lid and pivotally mounted tone regulating shutters, of a projectionextending outwardly from one of the shutters and provided with an enlargement at its outer end; and a latch pivoted on the lid and provided with a notch adapted to receive the projection, the enlargement being adapted to frictionally hold the latch in its locking position.

3. In a gramophone casing provided with aturntable and an amplifying chamber located below saidturntable; a tone arm carrying board hinged at its forward side atvthe rear end of the amplifying chamber; a tone arm carried on said the combination of a vswingable board; and a forwardly curved elbow secured to said board and communicatin with the tone arm and the amplifying cham er.

4. In a gramophone, the combination of -a casing provided with an amplifying chamber including a rearwall havln an opening formed therein; a motor boar adapted to form a cover for the amplifying chamber; a. tone varm carrying board hinged on the rear wall; a tone arm carried by the tone arm carrying board; and an elbow secured to the underside of the Said board and `communieating with the tone arm, the free endfof the h said o ning.

elbow projecting `throu anada, thls 19th day Signed at Toronto, of April, 1922.

HERBERT C. KING.

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