US1288168A - Mounting for tone-arms of talking-machines. - Google Patents

Description

J. J. PHlLLIPS.

MOUNTING FOR TONE ARMS 0F TALKING MACHINES.

APPLICATION FILED FEB. 21. 19!]. 7

ed Dec. 17, 1918.

ilmwmmm JAMES J. PHILLIPS, OF ROCHESTER, NEW YORK.

MOUNTING FOR TONE-ARMS 0F TALKING-MACHIN ES.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed February 27, 1917. Serial No. 151,365.

To all whom it may concern: 7

Be it known that I, JAMES J. PHILLIPS, a citizen of the United States, and resident of Rochester, in the county of Monroe and State of New York, have invented certain I new and useful Improvements in Mountings for Tone-Arms of Talking-Machines, of which the following is a specification.

The present invention relates to mountings for tone arms of talking machines, and an object thereof is to provide a simple and inexpensive construction which will permit the tone arm to swing across the record and, at the same time, have a movement toward and from the record.

To this and other ends, the invention consists of parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings Figure 1 is a ectional view through a tone arm showing the connection of the latter with the reproducer at one end and with the horn or amplifier of the talkingm'achine at the other end, the reprodiic er being adjusted for operating upon talking machines of the hill and valley type;

Fig. 2 is a detail view showing the reproducer adjusted for operating upon records of the lateral wave type; and

Fig. 3 is a sectional view on the line a-a',

Fig. 1.

Referring more particularly to the drawings, 1 indicates the casing of the talking machine which is provided, a usual, with the rotary record support 2 for the record 3.

A sleeve 4 is supported by a flange 5 on the top of the casing 1, and connects with the horn or amplifier of the machine, such horn or amplifier being usually arranged in the casing below the top of the latter.

Connecting with the sleeve 4 is an elbow tube 8 which has its two arms lying at right angles, one arm fitting within the sleeve 4 so as to turn in said sleeve, and a piece of felt 9 orother non-conductor of sound being interposed between the sleeve and the elbow, for the purpose of preventing any vibrations in either one of said part being transmitted to the other. To support the elbow 8 for turning in the sleeve 4 a pivot screw 10 may be employed, which turns loosely in the overhanging portion 7 of the bracket which projects upwardly from the sleeve 4. This pivot screw has a screw-threaded; portion which engages within an opening of a boss 11 formed on the elbow 8, the upper end of this boss cooperating with the under side of the overhanging portion 7 of the bracket 6, while the head 12 of the pivot screw cooperates with the upper surface of the verhanging portion. To the end of preventing the screw from working loose during the swinging of the elbow, the screw is split at 18, and after the screw has been properly adjusted its split end is spread apart, as shown in Fig. 1, t frictionally hold it against turning. At the same time, the

, screw may be removed by an ordinary screw driver.

The tone arm is connected to the horizontally-presented arm of the elbow 8 by a joint which permits the tone arm to swing in a vertical plane on said elbow, while preventing the tone arm from swinging in a horizontal plane on the elbow. In this embodiment the joint comprises a ring 15 fitted to the tone arm and having a curved cross section so that a spherical or ball end is provided on the tone arm, this ball end fitting within the horizontally-presented arm of the elbow 8, and being mounted to swing in said elbow about the axis formgd by two pins 16 arranged in alinement and extending through the ring 15 and the walls of the elhow 8. The inner ends of these pins cooperate with the tone arm, while the outer ends of the pins are engaged by a ring 17 which is fitted tightly on the elbow 8 to cover said pins. In this way both the pins are hidden and at the same ti'mecannot become displaced.

The outer end of the tone arm may be bent slightly downwardly at 18 and in this clownwardly-lbent portion an elbow l9 may have one arm mounted to turn. In theother end of the elbow 1-9 the flange 20 of the reproarrea- 21 may be mounted to turn. By this arrangement the reproducer may be positioned, as shown in Fig. 1, for operation upon "hill and valley records, or may be po sitioned, as shown in Fig. 2, for operation upon lateral wave records.

In the operation of the talking machine,

the tone arm 14 swings across the record 3 about the pivot screw 10 as an axis. The elbow 8 partakes of this swinging movement and connects with the sleeve 4: that leads to the horn, the connection being such that no metallic contact exists between the elbow 8 and the walls of the sleeve 4: to conduct metallic vibrations. While the elbow 8 partakes of the swinging movement of the tone arm, yet the latter may move independently of the elbow, so as to permit the rising and falling of the reproducer 21 on hill and valley records or the movement of the reproducer toward and from the record for the purpose of positioning the reproducer.

What I claim as my invention and desire to secure by Letters Patent is 1- 1. In combination with a stationary sleeve, an elbow having one arm turning in said sleeve, a tone arm connected to the elbow, a

- sound deadening ring interposed between the outer wall of the elbow and the inner wall of the sleeve, an external supporting member, and means for suspending the elbow from the supporting member comprising a bearing pin secured against turning on one of said parts and mounted 'to turn in the other of said parts, said bearing pin hav ing at its free end a shoulder which engages the part in which the pin turns to sustain e11- tirely the weight of the elbow.

2. In combination with a stationary sleeve,

a right-angled elbow having one arm mounted to turn in said sleeve about an axis com- Gopies of this patent may be obtained-for asagna cident with the axis of said sleeve, a tone arm having connection with the other arm of the elbow, and means for supporting said el'b'ow comprising an external bracket ex tending upwardly from the sleeve and having an overhanging portion provided with the opening coincident with the axis of turning of the sleeve, a '"boss on the sleeve 006perating with the under side of said overhanging portion, and a headed pivot screw passing through the o ening in the overhanging portion with its head cooperating with the upper side of said overhanging portion, and a screw-threaded portion extending into the boss, the under side being split so that the latter may be spread to prevent the free turning thereof.

3. In combination with an elbow, a tone arm, a ring secured to the tone arm and having a curved cross section, said ring fitting in the elbow, two alinedcylindrical pins passing through the elbow and the ring and having their inner ends abutting the tone arm, and a ring surrounding said elbow and covering the outer ends of the pins.

J AMES J. PHILLIPS.

five cents each, by addressing the Commissioner of Patents,

Washington, D. 9.

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