US715115A - Phonographic sounder. - Google Patents

Description

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UEirED STATES PATENT OFFICE.

GEORGE A. MOORE, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO THE MOORE TALKING SCALE COMPANY, OF BOSTON, MASSACHUSETTS, A COR- PORATION OF MAINE.

PHONOGRAPHIC SOUNDER.

SPECIFICATION formngfpart of Letters Patent No. 715,115, dated December 2, 1902. i

' Application filed March 8, 1902. Serial No. 97,282. (No model.)

To a/ZZ whom it may concern:

Be it known that I, GEORGE A. MOORE, a citizen ofthe United States, and a resident of Brookline, in the county of Norfolk, State of 5 ll/Iassachusetts,have invented certain new and useful Improvements in Phonographic Sounders, of which the following is a full, clear, and exact description. Y

The object of this invention is the construclo tion of an improved phonographic sounder to be used in connection with the weighing-machine set forth in my companion application, Serial No. 76,850, the requirements of which are that the sounder must be capable of ad- 15 justment in a line parallel with the face of the record-disk and after which adjustment to some designated point shall be substantially fixed in position while the record-disk rotates in contact with the sounder-stylus.

Referring to the drawings forming a part of this specification, Figure 1 is a sectional plan View on the line Y Y in Fig. 3. Fig. 2 is a section of the same on the line X X in Fig. 2. Fig. 3 is a sectional elevation on the z5 line Z Z in Fig. 1, this last figure being lout slightly enlarged, while Figs. 1 and 2 are made of nearly double the usual dimensions of my sounder.

The reference-numeral 1 designates a por- 3o tion of a record-disk designed to be rotatedupon a shaft 2.

3 is a vertical rod longitudinally movable in a line parallel with the face of the recorddisk l. Suitably bolted to said rod by means 3 5 of elbows 6 is an arm 7, carrying the sounderbox 10, containing the usual diaphragm 11.

The stylus 20, cemented in the ordinary manner at one end to the diaphragm, is fulcrumed by means of the slender rod or pintle 4o 21, which is fixed in a suitable opening in the sounder-box by means of a set-screw 23 and is pinned in the stylus-head 1S, being laterally cut away intermediate 0f the said box and head to give it transverse resilience, as

45 shown at 22.

Inasmuch as the sounder is designed to be substantially fixed in position during the revolution of the record-disk and the latter is liable to be somewhat warped or otherwise so 5o out of true as to cause its face to vary in distance from the sounder, I have devised the following construction for permitting the needle-point to accommodate itself to the record. This consists in jointing together the stylushead 18 and the needle-socket 16, the pivot 19 being made vertical or parallel with the rod 3 and the face of the record-disk, so that the needle-point can swing away from the said face, at the same time the joint being made to fit so snugly that the vertical vibrations communicated to the needle-point by the record-grooves shall be perfectly transmitted through the stylus-head and stylus to the diaphragm. A suitable tension-sprin g 24, anchored at one end to the screw 25 and at the other to the set-screw 17, by which the needle-point is secured in the socket 16, serves to retain the needle-point against the recorddisk with a proper resilient pressure.

The sou nder bein g designed to be vertically varied in position for a distance nearly equal to the radius of the record-disk and at the same time to communicate the vibrations of the diaphragm up to the fixed trumpet 13, I form the sounder-box with a tube 12, standing upward to a height approximately equal to the radius of the record-disk, and provide the lower end of the trumpet 13 with a tube 14 of nearly the same length and of a diameter to very loosely receive the tube 12, the dierence in diameters being such that there shall be no danger of the said parts contacting'and so causing a buzzing or rattling sound when the sounder is speaking.

Although the record-grooves on the disk are designed to be perfectly concentric, there is danger of their varying very slightly. Further, in vertically positioning the sounder it is seldom possible to bring the needle-point into exact alinement with a record-groove. It is therefore necessary'to provide the sounderbox with a slight degree of vertical play. To do this, I secure the sounder to the arm 5 in the following manner: Through enlarged holes 7in said arm I pass two screwsl, having washers 32 beneath their heads, and between said arm and the sounder-box and also between said arm and said Washers I introduce soft-rubber Washers or cushions 30. Said screws being set down to quite firmly com- IOO press said cushions,- the sounder-box is held with a sufficient degree of rmness, while at the'same time there is enough yield to the rubber to permit the needle-point to slightly tilt the sounder, .and so put itself accurately in any record-groove to which it is presented.

Although, as my description above would seem 'to indicate, I may use separate sections of rubber 30 between the arm 5 and the sou nder-box and the screw-heads, yet I prefer to make such sections as part of a continuous rubber washer or cushion extending from the sounder-box through the openings 7 up to the Washers 32. The advantage of this is that it is thereby made entirely impossible for the screws 3l to contact with the sides of the openings 7 and so interfere with the perfection of the tones emitted by the sounder.

What I claim as myinvention,and for which I desire Letters Patent, is as follows, to wit:

1. The combination with a phonographic sounder, of a stylus therefor having its needle-point pivoted thereto with a joint permitting iexure in a plane parallel with the diaphragm, and resilient means pressing said needle-point laterally in said plane, substantially as described.

2. The combination with a phonographic sounder, of a stylus and a needle-point socket jointed together to swing in a plane parallel with the sounder-diaphragm, and a tensionspring anchored to the sounder-box and said socket to elastically draw said needle-point in said plane, substantially as described.

3. The combination with a phonographic sounder, of a stylus affixed at one end to the sounder-diaphragm, the centrally-thin pintle fixed in the sounder-box and also in the head of said stylus, the needle-point socket jointed to said head to swing in a plane parallel with said diaphragm, and the tension-spring terminally secured to said box and said socket, substantially as described.

4. The combination of a disk record, a sounder having its axis parallel with the face of said disk and movable along said axis between the center and periphery of said disk, said disk and axis being vertical, a section of tubing rising from the sounder with its axis coincident with that of the sounder and receiving acoustic vibrations therefrom, and a fixed trumpet rising vertically from above said sounder with its smaller end loosely inclosing said section of tubing, substantially as described.

5. The combination with a phonographic sounder, of an arm having an enlarged opening, a screw passing through said opening and fixed in the sounder-box, and resilient cushions between said arm and box and between said arm and the screw-head, substantially as described.

6. The combination with the rod, of the arm rigidly projecting therefrom and formed with a plurality of openings, a phonographic sounder, screws freely passing through said openings and ixed in the sounder-box, washers beneath the heads of said screws, and softrubber cushions on said screws between said box and washers, substantially as described.

In testimony that I claim the foregoing invention I have hereunto set my hand this 28th day of February, 1902.

GEORGE A. MOORE.

Witnesses:

A. B. UPHAM, CHAs. A. CoUoH.

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