US1266307A - Talking-machine mechanism. - Google Patents

Description

A. E. PARNALL.

TALKING MACHINE MECHANISM.

APPLICATION man SEPT. is. 19m.

1,266,307. 7 Patented Mayl, 1918.

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TALKING-MACHINE MECHANISM.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed September 18,1916. Serial No. 120,820.

To all whom it may concern:

Be it known that I, Aroma E. PARNALL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Talking-Machine Mechanism, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, form'- ing a part of this specification.

My invention relates to talking machine mechanism.

One of the objects of my invention is to .provide an improved construction whereby a machine can be easily and quickly changed tor playing either a laterally undulating groove record or a hill and dale groove record, which will be simple in construction and efiective.

In the drawings, in which an embodiment of my invention is shown- Figure' 1 is a vertical section of a talking machine showing the sound box in position for playing the laterally undulating record; 1 Fig. 2 is a vertical axial section of a talkmg machine showing the sound box in position for playing record;

Fig. 3 is a fragmentary side elevation of part of the tone arm, parts being in section to show the interior construction;

Fig. 4 is a fragmentary view of part of one of the sections of the tone arm;

Fig. 5 is a vertical section on the line 55 of Fig. 3; and

Fig. 6 is a side elevation of the sound box.

Referring to the drawings in detail my invention is shown in connection with a talking machine comprising a casing 10, driving and transmission mechanism 11 housed in the casing, a record support 12 driven from the mechanism 11, a tone arm 13, asound box-M supported by the tone arm, and an amplifier 15 located in the casing and in communication with the tone arm.

a hill and dale groove e casing, driving mechanism, record.

' mg into a slot groove ing 17 to permit a vertical movement of the free end of the tone arm, necessitated by the change in position of the sound box for the two types of record. The free end of the tone arm terminates in a downwardly and outwardly extending tubular portion 18 on Which is rotatably mounted a tubular portion 19 extending centrally and axially from the sound box, the sound box being thus rotatably mounted to swing about an axis in a vertical plane through the axis of the tone arm. Any suitable means may be, provided for holding the sound box in position on the tone arm, such as a screw 20 threaded through the tubular portion 18 and extend- 21 in the tubular portion 19. A needle 22 is secured in the needle arm 23 which arm is pivoted at 24 to the sound box and has a laterally extending arm 25 for actuating the diaphragm of the sound box.

groove record the sound box is placed as shown in Fig. 2. The hill and dale groove will give an up and down vibration to the needle 22 which will be communicated to the diaphragm of the sound box through the laterally extending arm 25.

In using the machine with a laterally un-' sitates a vertical movement of the free end of the tone arm which is permitted by the swinging movement of the tone arm on the bearing 17 about a horizontal axis.

In order that the needle 22 may have substantially the same radius of movement when used with the two types of record the tone arm is made extensible from the position shown in Fig. 1 to theposition shown in Fig. 2; This is accomplished. by making the tone arm in two telescoping sections, 26v and 27, respectively. For limiting the telescoping movement and holding the sections in their proper relative positions a pin or screw 28 may be threaded through the section 26 and extended into a slot 29 in the section 27'. The telescoping movement is limited by the length of the slot 22.

In order that it may not he n%e ssary to In using the machine with a hill and dale Edd make the adjustment for the sound box independently of the adjustment for the tone arm means are provided whereby when the sound box 14: is rotated on the tone arm from the position shown in Fig. l to the position shown in Fig. 2 the tone arm will be extended. For this purpose a link 30 is pivotally connected atone end 31 to a portion of the sound box adjacent the needle arm 23, and is pivotally connected at its other end 32 to a section 26 of the tone arm.

With this construction simply rotating the sound box on the tone arm will eifect the telescoping movement of the tone arm and the needle arm 23 will always remain at substantially the same distance from the vertical axis of the tone arm.

Having thus described my invention what I claim as new and desire to secure by Letters Patent is 1. A talking machine comprising a tone arm mounted to swing about a Vertical axis, asound box mounted on said tone arm to swing about an axis, lying in a vertical plane through the axis of the tone arm from a Leeann? position in which the needle will properly engage a laterally undulating groove record to a position in which it will properly engage a hill and dale groove record, said tone arm being extensible, and means whereby a sound box mounted on said tone arm to swing about an axis lying in a vertical plane through the axis of the tone arm from' a position in which the needle will properly engage a laterally undulatmg groove record to a position in which it will properly engage a hill and dale groove record, said tonc arm being extensible, and means whereby rotation of the sound box about its axis will cause said tone arm to be extended, said means comprising a link pivotally connecta ing said tone arm and sound box.

In witness whereof, I have hereunto subscribed my name.

ARCHIE E. PARNALL.

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