US830446A - Sound-reproducer. - Google Patents

Description

PATENTED SEPT. 4, 1906. T. H. MACDONALD.

SOUND REPRODUGER.

APPLICATION FILED JAN.19. 1904;

FIG. 1.

the re roducer of a graphophone, one 0 THOMAS H. MACDONALD,

OF BRIDGEPORT, CONNECTICUT.

SOUND-REPRODUCER.

Specification of Letters Patent.

Patented Sept. a, wee.

. Application filed January 19,1904. swarm. 189,696.

To all whom, it may concern.-

Be it known that I, THOMAS H. MAonoN- ALD, of Bridgeport, Connecticut, have invented a new and useful Sound-Reproducer, which invention is fully set forth in the following specification.

1is 'nvention relates more particularly to and has for its objects the adaptation of what are called pivot-point reproducers for use withrecords of'varying depth.

. Illustrations of pivotoint reproducers are iven in my prior a plications for patent, erial No. 153,143, fi ed April 17, 1903, and

Serial No. 187,295, filed'Dec'ember 31, 1903.

e improvements constituting the present invention can best be explained in connection with the accompanying drawingsf to a movable pin tion, as shown Figure 1 is a cross-section of a'graphophone, showing the reproducer in operative position. Fig. 2 is a similar view of the carriage and reproducer, the latter being raised out of contact with the record. Fig. 3 is a similar view showing the recorder in place. Fig. 4' is a detail of the spring-plunger. Fig. 5 is a detail in cross-section of the sound-conveying chamber of the reproducer, and Fig. 6 is an enlarged detail of part of the reproducer.

The-carriage 6, feed-screw 7, lifting-lever 8, and lifter 9 are of ordinary or suitable construction. The carriage has, as usual, a

socket 10 to receive the recorder or"repro-v ducer. This socket contains at the bottom a fixed pin 12 and diametrically opposite there- 14, carried by a plunger 15, which is normally ressed downward by a spiral spring 16. The tubular chamber 17 of t e reproducer has on its upper side a hole or depression 18, which tapers upwardly, and at its lower side a slot 19, which extglnds to the end of the chamber.

When the reproducer is in operative posiin Fig. 1, it is-freeto oscillate laterally on anaxis coinc dent with the pins It is also free to move up and down to accommodate itself'to re ularities in the surface of the record 20, hie in this case is shown as cylindrical in form. This motion is permitted by the flaring shape of the hole 18 and by the curved s rface of the end of the tubular chamber 17 which enters the socket.

0 remove the reproducer, plunger 15 is lifted permitting its withdrawal.

The recorder 21, Fig. 3, is pivoted at its 'a vertical axis.

I. ends within a ring 22, which fits tightly in the socket 10 and is also provided with holes to receive.the'pins 12 14. The recorder may thus oscillate on a horizontal axis, but not on chamber 17 of the reproducer is a slotted piece or saddle 24, in w ich the lifter 9 engages to raise the reproducer from the record, as shown in Fig. 2.

he slot in saddle center line of the re reducer. I

Heretofore the diaphragm 26 of the reproducer has been placed in a plane transverse to the axis of the conveying-tube 17 of the reproducer or in a plane parallel therewith. According to this invention the diaphragm 26 and sound-chainber 27 are in a plane oblique to the tube 17, which gives. superior acoustical results. The stylus-carrying arm or lever 28 is attached to the diaphragm at one end and carries the stylus 29 at the other. Owing to the oblique arrangement of the diaphragm and the relative positions of the other parts, the stylus acts upon the record in a line approximately erpendicular to the tangent at the oint of contact and perpen-- dieular to the lime of the diaphragm. The stylus arm or ever 28 is fulcrumed on pivotpoints 30, Fig. 6, as described in my aforesaid Beneath the tubular applications; but the improvements herein set forth are not limited to roducers, though in some arly applicable thereto.

cla1m- 1. The combination with the pivot-point reespects particue p1ntherein, a s the movable pin, ansound-conveying tube and a flaring hole for pins.

2. The combination with the in a tubular socket, of a fixed pin and a movabe pin therein, a spring-plunger carrying the movable pin, and a recorder pivoted in a ring which fits closely in said socket, said ring ringplunger carrying a reproducer havin a provided with a .s ot engagement with said having holes for engagemen t-b said ins..

The combination with t e soc et hav- 1 ing a fixed pin and a movable pin, of a reproducer supported when in and having freedom of motion in two directions, a sl tted saddle beneath the reproducer, a lifter engaging in the slot of said saddle, a rid operating means for the lifter.

4. The combination of a sound-record with a sound-re producer having a casing, a sound- {1 guides the lift-er to the 9. carriage ha.v .inga tubular socket, of a fixed pin and a movab carriage havplace in' said socket conveying tube or ehmnher, a diaphragm dis- 1 posed V hiiqu =iy 1o ihe tube or chamber, a 1 stylus-lever illhlulntfii between its ends on i said casing and having one arm engaging the I diaphragm, and a stylus on the other arm vi brating perpeiniiculur to the record.

5. The combination of a sound-record with a sound-reproducer having acesing, ii soundconveying ube or ch amber, a'diaphregin disposed obliquely to the tube or chamber, a stylus-lever pivoted between its ends on said 1 easing and having one arm engaging the dia- )hragm, and a stylus on the other arm v1- )l'atlng perpendicular to the record.

In testimony whereof I have signed this 15 THOMAS H. MACDONALD.

Witnesses:

O. A. GIBNER, A. B. KEOUGIL

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