US1310791A - Planooraph co - Google Patents

Description

WIRE LOOPING DEVQCE FOR PIANO STRINGS.

APPLICATION FILED FEB. 24. I919.

1,3 10,791 Patented July 22, 1919.

2 SHEETSSHEET A.. COGOZ ZO.

WIRE LOOPING DEVICE FOR PIANO STRINGS.

APPLICATION FILED FEB. 24 1919.

Patented July 22, 1919.

2 SHEETS-SHEET 2.

1| H hi i :1 42 w A e 6 J D a M 17 Ha a MJ-wW/Q i zkenzrr UNITED STATES PATENT onnron.

ANTONIO coeozzo, on NEW YORK, N. Y., ASSIGNOR TO RUDOLPH o. KOCH, or NEW YORK, N. Y.

Specification of Letters Patent.

Patented July 22, 1919.

Application filed February 24, 1919. Serial No. 278,812.

To all whom it may concern:

Be it known that I, AN'roNIo Cooozzo, a subject of the King of Italy,'having declared my intention of becoming a citizen of the United States, and a resident of the borough of Bronx, county of Bronx, city and State of New York, have invented certain new and useful Improvements in Wire- Looping Devices for Piano-Strings, &c., of which the following is a specification.

My invention relates to means for twisting the ends of wires to form loops thereon, as in the manufacture of piano strings, and for analogous purposes; and the object is to completely eliminate all waste of wire and simplify the manipulation thereof, while at the same time attaining an eflicacious and superior product.

The invention consists in the specific construction, combination and arrangement of parts described and claimed, distinctive fea tures being the provision of a socket in the platen block for the reception and retention of the otherwise free end of a wire durin the twisting operation, and the provision 0 a hand lever by which pressure may be applied to the wire in such manner that the twisting thereof is effectually and conveniently controlled, all as hereinafter fully set forth.

In the accompanying drawings,

Figure 1, is what may be designated as a front elevation of my improved wire clamp-- lng mechanism, turned back into Fig. 2, is an angles to Fig. 1;

Fig. 3, is a top view of the parts as shown in Figs. 1 and 2;

Fig. 4, is a sectional detail taken plane of line 4-4, Fig. 2;

Fi 5, is a front view of the platen block, detac ed from its support; I

Fig. 6, is a transverse section taken plane of line 6-6, Fig. 5;

Fig. 7, is a top view of the platen block;

Fig. 8, is a si e elevation like unto Fig. 2, except that the pressure lever is raised into operative position and the crank handle moved to set the clamping jaw,this view also illustrating the operative position of my improved clamping mechanism as related to the rotatable twisting hook and the pressure lever being inoperative position;

elevation taken at right upon upon

spindle;

Fig. 9, is a top view with the pressure lever retracted and broken away the better to show the position of the wire in the clamping mechanism, and the shank twist imparted to the wire;

Fig. 10, is a detail of the platen block clamping jaw, and wire, with the finishing coil imparted to the latter after the shank twist;

Fig. 11, is a detail view of a finished wire end;

Fig. 12, is a view showing the bent end of the wire before insertion in my improved clamping mechanism;

Fig. 13, is a view of the end of the wire after the formation of the loop and the shank twist and prior to the finishing coil, imparted to the extreme end of the wire that occupies the platen socket during the loop and shank twist;

Fig. 14, is a view of the looped end of a wire as twisted under the old method, showing the waste of wire involved;

Fig. 15, is a rear mechanism on a smaller scale.

Heretofore, in the looping of piano strings, it has been customary to double over the end of a wire upon itself for a length sufiicient to admit of the insertion of both the strands (e, c, Fig. 14) of wire, thus formed, between the clamping jaws preparatory to the twisting operations, thus necessitating the cutting off and discarding of the free end (6) after the formation of the finishing coil In this old method, after the clamping of both strands e, e, of the end of the wire and the rotation of the protuberant loop to form the shank twist 0 the end strand 6, was released from the clamping means, the main strand 6, reclamped, and the loop 6 again rotated to form the finishing and locking coils e*,the free end 6, of the wire being meanwhile held taut by hand so as to afford the necessary tension. Obviously a suflicient length of free end wire had to be provided to admit of a good finger urchase thereon to enable the operator to so old the end of the wire taut during the twisting of the securing coils e, as above stated. After the formation of said securing coils the free loose end e, of the wire was broken off as close as possible to said coils e, and discarded.

This old method obviously involved loss looped and view of the clamping in proportion to the value ofthe length of wire thus discarded, as well as of the time and labor involved in unclampmg the strands, reclamping the main strand, and

holding the end of the wire taut between the fingers during the formation of the securing coil 0*. c

I obviate these objectionable features by inserting only one, the main, strand e, of the wire between the clamping jaws, and by inserting the extremity 6*, of a shortened free end of wire in a socket 1?, formed for its reception in the platen block P,said free socket-extremity 6*, (Figs. 12 and 18) of the wire 6, being finally and fully utilized and incorporated in the finishing and fastening coil 6", as in Figs. 10 and 11, during the formation of said coil 6, so that absolutely no waste of material is involved, and no trimming or breaking off operation is necessary.

It will thus be seen that an essential feature of my invention, in conjunction with suitable clamping and twisting mechanism, is the formation of the platen block 1?, with the socket p, for the reception and retention of the free end e ,,of the wire during the operation of forming the loop e and shanktwist 6 so that I do not confine myself herein to the identical clamping and twisting mechanism herein shown by way of demonstrating the practical utility of my invention, it being obvious that various modifications may be made in the configuration and construction of parts with like results, and without departing from the spirit and intent of my invention in this respect, which contemplates broadly means for holding laterally as related to the main strand the otherwise free end of the wire during the formation of the loop and shank twist, and then of the securing coils substantially as herein set forth.

With this qualification, it is to be understood that H, Fig. 8, represents the usual rotatable twisting hook and spindle employed in conjunction with the clamping means, all of a character and in a manner well known in the state of the art. B, is a base standard adapted to be clamped to a suitable stationary support positioned in proper relation to the rotatable twisting hook and spindle H. To this base standard B, is secured a back plate B, by means of bolts 6, b. Resting upon the top of the standard B, and secured tomthe back plate B, by screws 29, p, is the platen block P. The hand control lever T, is fulcrumed on a bolt t, secured to an upper extension B, of the back plate B,the function of the short or bearing arm t, of lever T, being to control the wire adjacent to the clamping jaw J, and hold the extremity 6*, in the socket p, in the platen block P, until the shank twist 6 is completed, after which the pressure on the hand control lever T, is relaxed sufiiciently to permit the continued rotation of the twisting hook to draw the said extremity e", from the socket p, and

wind it tightly around the main strand 6,

of the wire, forming the finishing and securing coils e*.

The socket p, is formed with a depth gage, to govern the extent of protrusion of wire thereinto, and various mechanical expedients may be resorted to for this purpose, that shown in the drawings (see more particularly Fig. 4) consisting of a set screw 19 the inner end of which constitutes the bottom of the socket p. It will be noted in this connection that the socket p, is positioned substantially at right angles to the position of the main strand of: wire when clamped in position; and that the adjacent face of the platen is countersunk or recessed to accommodate said strand 6, (as at 10 and to also accommodate (as at 10,- Figs. 6 and 7) the securing coils 6 as formed at the termination of the twisting operation.

The clamping jaw J, is fulcrumed on the base standard B, by means of the bolt 3'. The upper portion of the clamping jaw J, is held in alinement by a guard plate G, screwed to the back plate B, and by the head of a bolt j; the jaw J, being slotted as at y' (Fig. 15) to straddle said bolt 1', so as to admit of the movement of the jaw J, which movement is effected by means of the crank handle C, actuating a spindle c, the inner end of which is screw threaded for engagement with the nut N.

I herein designate the hand leverT, as a control lever because its function is to control the formation of the convolutions ofthe otherwise free end 0, of the wire during the formation of the shank twist c and the locking coils e, as herein set forth.

What I claim as my invention and desire to secure by Letters Patent is: 1. In wire looping mechanism of the character designated, the combination with a rotatable spindle and twisting hook, of means for clamping the main strand of a wire, a platen formed with a socket for the reception and retention of the otherwise free lateral extremity of the bent end of the wire, and means for applying pressure to said lateral extremity of the wire during twisting operations, for the purpose described.

2. In wire looping mechanism of the character designated, the combination with a rotatable spindle and twisting hook, of means for clasping the main strand of a wire, a platen formed with means for the retention of the otherwise free lateral 'extremity of the bent end of the wire, and means for applying pressureto said lateral extremity of the wire during twisting operations, for the purpose described.

3. In wire looping mechanism of the character designated, the combination with a rotatable spindle and twisting hook, of means for clamping a main strand of wire, a platen formed with a socket laterally positioned as related to the prescribed position of said main strand of wire and adapted to receive the otherwise free extremity of the bent end of the wire, and means adapted to control by pressure said lateral extremity of the wire during the twisting operations, for the purpose described.

4. In wire loopin mechanism of the character designated, the combination with a rotatable spindle and twisting hook, of means for clamping a main strand of wire, a platen formed with a socket laterally positioned as related to the prescribed position of said main strand of wire and adapted to receive the otherwise free extremity of the bent end of the wire, means for regulatcopiel of this patent may be obtained for five cents each, by addressing the Commissioner ing the depth of said socket, and means adapted to control by pressure said lateral extremity of the wire during the twisting operations, for the purpose described.

5. In wire looping mechanism of the character designated, the combination with a rotatable spindle and twisting hook, of

means for clamping a main strand of wire, a platen formed wlth a socket laterally positioned as related to the prescribed position of said main strand of wire and adapted to receive the otherwise free extremity of the bent end of the wire, and a hand lever adapted to control by pressure applied thereto said lateral extremity of the wire during the twisting operations, for the purpose set forth.

ANTONIO COGOZZO. Witnesses:

EMH. H. Dm'rz, MILTON I. MASSON.

of Patents,

Washington, D. 0."

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