US1310946A - John h - Google Patents

Description

J. H. Jx 'HAINES- PHONOGRAPHIC REPRODUCER.

APPLICATION nuzu IUNE 15. 1918.

Patented July 22, 1919.

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To all whom it may concern:

Be it known that I, JOHN H. J. HAINES, a citizen of the United States, residing at the city of New York, in the borough of Manhattan and Stateof New York, have invented certain new and useful Improve ments in Phonogra hic Reproducers, of which the following is a full, clear and exact description. 7

This invention relates to phonographs and has special reference to that part of the ma chine known as the reproducer, the object .of the invention being to provide a reproducer which will operate with equal efiicienc in connection with records which have een made either by an up and down cut or by a lateral cut of uniform Y depth of the recordingstylus.

It is well understood in theart that a record groove formed by the so-called lateral cut, in actuating the stylus of the reproducer, swings'the latter to the right and left, while the record groove which ismade by the so-called' up'and down out, swings the st lus in a corresponding. up and down direction. It has therefore "been found difficult to provide a reproducer which will act with equal efliciency' in connection with either style of cut'on account ofthe fact that the reproducer as a whole cannot be shifted in position with respect to'the face of the record so that the vibration of the vneedle will have the same effect upon the diaphragm in each case. It is obviously an advanta e to have a reproducer which will operate in connection with either style of] record for the reason thatboth styles are in common use'and the expense involved in having two reproducers is, of course, to beavoided, if ossible. The primary object of m invention is to provide a reproducer 'whic can be used at will with recordsof either style of cut. A further object of the invention is to combine in one instrumentality a reproducer and a sound am lifier. My invention therefore comprises t e attaching of'a stylus to a diafiihragm by means Specification of Letters Patent. Patented J 1y 22, 1919, Application filed June 15, 1918. "Serial- No. 246,154.

idly upon a conical diaphragmjof compara-' tively large diameter which being somewhat of the shape of a horn serves to amplify and control the direction of the sound.

Referring to the accompanying drawing:

Figure 1 represents in slde elevation, with parts 1n section, the turn-table of a phonograph with my improved reproducer and iamplifier applied thereto in operative posiion; I

Fig. 2 is a plan of the outside of the reproducer; 7 Fig. 3 is a fragmentar enlarged view at the apex of the I re r0 ucer showing the stylus mounting; an y Fig. 4 is an enlarged detail of the means for mounting the reproducer upon the machine.

The reproducer consists essentially of a large cone 1 of sheet material, such as metal, leatheroid or other suitable stifi material,

provided with a h0op'2 around its edge to give it definite form and stability and to serve as a frame to facilitate the mounting of the cone in operative position upon the machine, as will be hereinafter explained. This cone is preferably from 8 to 10 inches in diameter and the angle between its sides which aflords the best results is approximately 120. 3 indicates the stylus or needle which engages the record groove. This nee; dle is rigidly attached to the cone 1 by means of a connecting member indicated, as a whole, by 4 and comprising a central post 5 and two arms 6, 6 extending diametrically opposite each other from the sides of the post. The arms, while being in the same plane with each other occupy an angular position to each other corresponding approxlmately to the angle between the sides of the cone 1. The extremity of each arm is provided with a foot piece 7 havin a threaded orifice to receive a screw 8. The

inner end of the post 5 is provided with an axial threaded orifice to receive a screw 9.

The connecting member is rigidly attached to the cone in such a position that the needle or axis of the post 5 will be in line with the apex of the cone, in which position the post is secured by means of the screw 9 whicg passes through a threaded bushing 10 seate at the apex of the cone. The arms 6 extend oneach side of the post a considerable distance therefrom and are secured to the wall of the cone by means of the screws 8- beforementioned, which pass through washers 11 between which and the foot pieces 7 the wall of the cone is clasped. The three connecting points of the-members 4 are therefore in line with each other and with the middle point located at the apex of the cone. If desired the arms 6 may extend from the base of the post 5 and along the surface of the cone and be connected thereto by wax along their entire length, thus making an elongated narrow continuous anchorage between the connecting member and the cone which I regard as the equivalent of the three connections arranged in a line. Since the connecting member has no support upon the cone in any transverse. or angular direction to its'-'length it is evident that it is more sensitive to movement in that direction than in any direction concident or parallel to its length. Therefore when the reproducer is mounted to en age the groove in a record it is placed so that the direction of vibra tions imparted to the stylus and connecting member by the groove formations shall be transverse to the elongated connecting member. Thus the position of the reproducer in Fig. 1 is adapted for a lateral out groove or a groove in which the undulations are formed in the side walls of the groove and cause the stylus to vibrate from right to left or side to side. By turning the cone upon its axis through an angle of 90, the connecting member will be brought into a position transverse to the up and down vibrations caused by the needle running in a record groove of variable or undulating depth formed by the up and down out. Hence the vibrations in both cases are transverse to the elongated connecting member and the character of the reproductionwill be the same in both cases.

In order to shift the reproducer with ease and despatch to either of the two positions stated, I provide a block 12 or a portion of the frame of the instrument with a socket 13 for a post 14 which is adapted for detachable connection with either of two hinges 15, 16 fastened to the rim of the cone 90 apart. These hinges are located, one in the same plane with the elongated connecting member and the other in a plane at right angles thereto. When a record is to be reproduced, the pin is screwed into the appropriate hinge to conform to the requirements of the cut in the record and then'inserted in the socket 13 thereafter the cone is allowed to swing'downward until the stylus 3 rests upon the record whereupon the reproduction will start. In this inclined position of the cone the needle will be inclined to the face of the record and this inclination will be the same for both styles of record used. When a different style of record is to be reproduced, the pin is removed from the hinge it is in and inserted in the other. The cone is only partially supported by the block or frame, a suflicient portion of its weight being applied through the needle to the record in order to hold the latter steadily in the groove. This weight may be altered by adding weight to or removing it from the rim 2.

The vibrations imparted to the'apex of the cone extend to the rim and propagate sound waves in the air which, by reason of the large size of the cone, afford a loud reproduction of the record. I desire to point out that by reason of the direct connection of the needle to the diaphragm and the fact that such connection is elongated, I am able to utilize a diaphragm of large size, because with such construction the entire vibration created by the record groove is imparted to the cone, none being lost by loose pivotal joints which are found in" the ordinary re producing devices.

I claim:

1. A reproducer for phonographic machines consisting of the combination of a diaphragm, a stylus and a connecting mem-,

ber by which the stylus is rigidly attachedto the diaphragm, said connecting member being elongated and narrow in shape and being connectedto thediaphragm at three points located in a straight diametrical line, the middle point of connection being at the center of the diaphragm and the connecting member being at all other points out of contact with the diaphragm.

3. A reproducer for phonographic machines consisting of the combination of a diaphragm, a stylus and a connecting member by which the stylus is rigidly attached to the diaphragm, said connecting member comprising a central post in which the stylus is held and two arms extending from said post and in opposite directions, the post and the extremities of the arms being attached to the diaphragm.

4. A reproducer for phonographic ma- 130 chines, consisting of the combination of a diaphragm, a stylus and a connecting meniber by which the stylus is rigidly attached to the diaphragm, said connecting member 5 being attached to the diaphragm at a plurality of points located in line with each other and being out of contact with the dia phragm at all other points, said stylus being located in the same plane as the points of attachment of the connecting member with 10 the diaphragm.- v

In Witness whereof I subscribe my signa- JOHN H J. HAINES.

, ture.

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