US1473004A - Phonograph - Google Patents

Description

Nov. 6 1923.

1,473,004 J. W. BISHOP PHONOGRAPH Filed Oct. 17 1921 T all whom it may concern:

Patented Nov. 6, 1923.

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JOSEPH W. BISHOP, 0F MUSKEGON, MICHIGAN, ASSIGNOR TO THE BRUNSWICK- IBALKE-COLLENDER COMPANY, OF CHICAGO, ILLINOIS, 'A CORPORATION DELA- WARE.

PHONOGBAPH.

Application filed October 17, 1921. Serial No. 508,810.

Be it known that I, JOSEPH W. Brsnor,

' a citizen of the United States, residing at uskegon, in the county of Muskegon and State of Michigan, have invented certain new and useful Improvements in Phonographs, of which the following is a specificatlon.

This invention relates to phonographs and has for its principal object to provide a con-- struction in which the needle in reproducing will travel along the same path with res ect to the record as the needle did in recording.

Another-object of the invention is to produce a' construction whereby the needle will travel along the radius of the record during reproduction.

Another object of the invention is to eliminate the customary tone arm and connected parts, thereby enabling the phono- "graph mechanism to be made much more compactly and at a lower cost.

Further obiects of the invention will be come apparent as the description is read in connection with the accompanying drawing showing a selected embodiment of the invention in which- Fig. 1 is a fragmentary plan view illustrating the novel structure and a portion of the record;

Fig. 2 is a longitudinal sectional view on the line 2-2 of Fig. 1;

Fig. 3 is an end elevation showing the nee dle and needle support; and

Fig. 4 is a fragmentary detail illustrating a modification.

In the drawing, 10 indicates a top plate or I motor board, 11 a record-table carrying a motor board and has a bifurcated end'14f record 12, and adapted to be revolved by the customary mechanism, not shown. A bracket 13 is secured to the bottom of the provided with pivots 15 upon which is mounted a tubular member, or tone arm 16 equipped at its free end with a sound box 17 I have shown the tone arm as having a frustoconical sound passage 18 communicating with the interior of the sound box 17 which is secured to a flange 19 on the tone arm. Within the sound box is the usual diaphragm 20 clamped between the tubes 21. The upper portion of the sound box 22 converges as indicated in Fig. 2, and has a U- shaped flange 23'to which is secured an upright 24, also U-shaped, and having at its upper end the arms, or brackets 25 to which a yoke 26 is pivoted by screws 27 as indicated in Fig. 1. A pair of bars 28 are connected with the yoke 26 and carry at their opposite ends a horseshoe-shaped. frame 29, best shown in Fig. 3. A spring 30 is suitably secured to the upper portion bf the frame 29 and carries the needle support 31 having an angular needle socket 32 in which a needle 33 is adapted to be secured by means of a screw 34. The needle support 31 is connected with one end of a rod 35, the opposite end of which is pivoted at 36 to an arm 37 of hell crank lever 38, having an arm 39 connected by a rod 40 with the diaphragm 20. The axis of the pivot 36 is co-incident with the axis of the screws 27 so that the bars 28 carrying the needle support can be freely wung about horizontal'axis passing through the screws 27 without eifecting the position of the bell crank lever 38. The axis of the pivots 15 is at right angles to a radius of the record table 11, and therefore the swinging movement of the sound box and connected parts will be co-incident with the radius of the record table. In order to prevent the weight of the moving parts from effecting the action of the needle, equalizing springs 41 are secured to the bracket 13 at 42 and engage lugs 43 on the tube 16.

In operation the tone arm and sound box are swung to the left in Fig. 2 until the needle 33 can be engaged with the record groove at the outside of the record, the springs 41 acting to equalize the weight of the parts. As the record rotates, the needle traveling in the spiral groove gradually feeds toward thecenter of the table along the radius carrying'with it all the parts supported by the pivots 15. The rods 35 and 40, and the bell crank lever 38 communicate the vibrations of the needle to the diaphragm 20 from which the sound vibrations pass down the frusto-conical passage 18 into the amplifier 44 which may be of any form desired.

The angular form of the rod 40permits y an attachment, as may be foun sound box can be very compactly arranged so as to take up very much less room. It

will also be obvious that the embodiment here shown can bemanufactured at a very much lower cost than the phonographs at present in common use.

The construction illustrated in Figs. 1, 2 and 3 is intended to reproduce laterally cut records, but by providing the needle support with an arm 45, as indicated in Fig. 4, the device can be adapted to play hill and dale records. This arm may be made as an integral part of the needle sup ort, or as most desirable.

I am aware that changes in the form and proportion of parts, and in the details of construction of my invention may be made without departing-from the spirit or sacrificing an of the advantages thereof, and .I reserve t e right to make all such changes as fairly fall within the scope of the follow ing claims.

I claim:

1. In a device of the class described, a sound box mounted to swing about a horizontal axis, a frame pivoted to said sound box, a needle support carried by said frame and adapted to move along a radius of the record table, arecord table adapted to support a record in the position to act upon a needle in said support, a diahragm in said sound box, and means pivota 1y connected to the sound box for connecting said needle support with said diaphragm.

2. In a device of the class described, a record table, a sound box pivoted to swing about an axis at ri ht angles to a radius of said record table, a rame pivotally connected with said sound box, a needle support carried by said frame and adapted to move along a radius of the record table, a diaphragm in said sound box, and means for connecting said needle support with said diaphragm.

3. In a device of the class described, a record table, a sound box pivoted on s an axis at right angles to a radius of said record table, a diaphragm in said' sound box, a needle support adapted to move along a radius of the record table, means carrying said needle-support and pivotally connected with said sound box, and means including a pivotal lever for operatively connecting said needle support with said diaphragm.

4. In a device of the class described, a. record table, a sound box pivoted on an axis at right angles to a radius of said record table, a frame pivotally connected with said sound box on an axis parallel to the pivotal axis of said sound box, a needle support carried by said frame and adapted to trav erse a radius of the record table, a diaphragm 1n saidsound box, and means for connecting said diaphragm and said needle support. Y

5. In a device of the class described, a record table, a sound box pivoted on. an axis at right angles to a radius of said record table, a frame pivotally connected to said sound box on an axis at right angles to said record table, a diaphragm in said sound box, p

with said sound box, and adapted to move-- along a radius of the record table, a diaphragm in said sound box, and means including links and a bell-crank lever for connecting said needle support with said diaphragm.

7 In a device of the class described, a motor board or the like, a rotatable record table disposed above the motor board or the like, a pivotally mounted sound box disposed beneath the motor board or the like, the pivotal axis of the sound. box being normal to the axis of rotation of the record table, a needle adapted to engage a record on the record table, and means operatively connecting the needle to the sound box.

8. In a device of the class described, a motor board or the like, a rotatable record table disposed above the motor board or the like, a sound box disposed beneath the motor board or the like, means for pivotally mounting the sound box to swing in a plane substantially coincident with the axis of rotation of the record table, a travelling needle adapted to engage a record on the record table, and means operatively connecting the needle to the sound box.

9. In a device of the class described, a motor board or the like, a rotatable record table disposed above the motor board or the like, a pivotally mounted sound box beneath the motor board or the like and having a diaphragm therein, the pivotal axis of the sound box being normal to the axis of rotation of the record table, a frame, a needle support carried by the frame, and means operatively connecting the needle support with the diaphragm.

10. In a device of the class described, a

motor board or the like, a record table dis-' 11. In a device of the class described, an

apertured motor board, a record table disosed above the motor board, a sound box isposed beneath the motor board and hav- 5 ing a diaphragm therein, means for pivotally mounting the sound box, a bracket rigidly secured to the sound box and pro- JOSEPH W. BISHOP.

jecting through the aperture 'in the motor board, a frame pivotally connected to the bracket, a needle support carried by the 30 frame, and. means 0 eratively connecting the needle support wit the diaphragm.

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