US1316533A

US1316533A - Edward tthomas chebnttshek

Info

Publication number: US1316533A
Authority: US
Publication date: 1919-09-16
Anticipated expiration: 1936-09-16

Description

E. T. CHERNUSHEK. vPHONOGRAPH NEEDLE- APPLICATION FILED JAN-2'8. 1919.

Patented Sept. 16, 1919.

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EDWARD THOMAS GHEBNUSHEK, OF NEW YORK, N. Y.

Patented Sept. 16, 1919.

rnonoomn-mnnm 1,31 ,533 Specification of Letters Patent.

Application filed January 28,1919. Serial No. 273,579.

To all whom it may concern Be it lmown that I, EDWARD THOMAS CHERNUSHEK, a subject of the Emperor of Austria, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Phonograph-Needle, of which the following is a full, clear, and exact description. a

This invention relates to sound reproducing devices and has particular reference to needles for phonographs or like instruments. Among the objects of the invention is to provide a needle and a peculiar holder for the same providing for the use of a single needle for the playing of a vast number of records without renewal.

' A further object of the invention is to provide a phonograph needle of such a character as to be well adapted for sound reproduction purposes on a large number of records without renewal or adjustment, but

which may be adjusted from time to time so that a single needle will last for the satisfactory playing of thousands of records,

diagram the approximate angle at which the axis of a needle is inclined to the plane of the record.

Fig. 2 is a vertical sectional view on the line 2-2 of Fig. 1, the needle chuck being in elevation.

Fig. 3 is a central sectional view through the chuck.

Fig. 4 is a plan view of the chuck shown in Figs. 2 and 3.

Fig. 5 is a plan view of a modified form of the same; and

Fig. 6 is a detail perspective view of one of the chuck jaws.

Referring now more specifically to the drawings I showa reproducer 10 having a needle holder shown generally at 11 but inthe lower flat faceof the head 16, and a collar 18 having a conical flange 19 embracing the point portions of the jaws and having an internally threaded base adjustable upon the threaded head 16. I preferably provide two of the conical jaws 17 each comprising a half cone and when fitted together they constitute essentially a single cone having a minute bore 20 formed through the apex thereof. Above this apex the bore 20 is counterbored at 21 and beveled or further counterbored at the base portion at 22. The shank 14 is provided with a central bore 23 of a caliber approximately equal to the diameter of the last mentioned counterbore 22 and with. which it registers when the parts are assembled. The tightening of the collar upon the head 16 causes the flanged portion 19 of the collar to hold the cone members 17 firmly against the head and against each other.

The needle 24 consists of a simple straight piece of very fine high grade steel Wire, or its equivalent, the diameter of which through the length of the needle is uniform and small enough to serve as a reproducing needle point at any cross section thereof.

.The needle is firmly gripped in the minute bore 20 between the jaws 17 near its lower end or at least near enough to the lower end or active point to obviate any material spring of the needle with respect to its length. The main portion of the needle extends upward along the

bores

21 and 23 and the upper end of the needle is fitted with a head 24 of any suitable relatively soft material such as lead. This head acts as a plunger or uide and has a sliding fit in the-bore 23. Fitted as stated the head will prevent any possible vibration of the needle in the chuck above the bore 20.

In a device constructed and adjusted as indicated, the portion of the needle which projects below the jaws 17 will serve to. play a considerable number of records without change or adjustment. W'hen, however, the extended portion of the needle wears off or nearly off a fresh portion of the needle may be projected by removal of the chuck from the holder 12 and projecting the instrument such as a pin or the like clown into the bore 23 against the head 24 forcing the same downward as far as desired. The jaws 17 may be loosened for this purpose if the frictional grip thereof on the point portion of the needle is too great. After such adjust ment the needle obviously willbe suitable for playing another large number of records. These needles and chucks can be made at relatively low cost and serve to last for a long season of operation with satisfactory results.

In Fig. 5 I show a chuck substantially the same as above described, but having a shank 14: of a different form from that shown in Fig. 4: so as to adapt the same immediately to a holder having a triangular bore.

1 claim:

1. A phonograph needle comprising an elongated piece of fine steel wire of uniform cross section throughout its length, and an enlargement at its upper end and adapted to serve as a guiding means and centering means for the needle when in operative posiing an enlargement at its upper end and a chuck for holding the same and to provide longitudinal readjustment after portions of the needle have worn off, said chuck comprising a shank having a bore in which the enlargement at the upper end of the needle is slidably fitted, gripping members embracing the point portion of the needle close to its active end, and means to lock the gripping members to the shank member.

4. A phonograph needle comprising a rectilinear piece of hard metal of uniform cross section throughout its length and continuously operative as a record engaging medium, and a head of relatively soft material inounted on the upper end of said needle, as and for the purposes specified.

V5. The combination with a phonograph needle, of minute diameter and of uniform cross section throughout its 'length of a holder therefor comprising a plurality of.

jaws, and means to hold said jaws in close gripping contact, said jaws being provided with a minute axial bore through which the active end of the needle projects and within which it is held, said bore being counterbored above the point portion and the upper end of the counter-bore being beveled, said needle having a cylindrical enlargement at its upper end said holder comprising a shank having a bore in which the enlargement at the upper end of the needle is snugly fitted for sliding movement, said shank being adapted for engagement within a reproducer holder.

EDWARD THOMAS CHERNUSHEK.