US2052443A - Spring winding tool - Google Patents

Description

1936. J. BLANER SPRING WINDING TOOL Filed April 10, 1955 Aug. z5,

INVENTOR ATTORNEYS Patented Aug. 25, 1936 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to a tool especially adapted for the construction of coil springs and has for the primary object the provision of a portable device which may be easily applied and supported by a vise and like device and is so constructed that it may be manually operated and adjusted to form springs of any desired pitch either of the coiled compression or extension types and is capable of coiling either square or round wire of any length and gauge.

With these and other objects in view this invention consists in certain novel features of construction, combination and arrangement of parts to be hereinafter more fully described and claimed.

For a complete understanding of my invention, reference is to be had to the following description and accompanying drawing, in which Figure 1 is a perspective View illustrating a tool constructed in accordance with my invention.

I Figure 2 is a vertical sectional View illustrating the same.

Figure 3 is a side elevation illustrating the tool supported by a vise.

Figure 4 is a detail sectional View illustrating the mounting of the mandrel to the holder or body of the tool.

Figure 5 is a detail longitudinal sectional view showing the adjustable spring pitch device and also illustrating the wire feeder or guide to the mandrel.

Referring in detail to the drawing, the numeral I indicates a body or holder of the tool which has one end reduced, as shown at 2, to be received between and gripped by jaws of a vise 3 as disclosed by Figure 3. The holder or body I is of substantially rectangular shape in cross section and when in use is supported vertically by the vise. A chamber 4 is formed in the body and opens outwardly through the lower end of the latter. Opposite Walls of the body are provided with mandrel receiving openings 5 which communicate with the chamber 4 and in which is rotatably mounted a mandrel 6. The mandrel is engaged by a jaw l slidably mounted in the chamber 4 and is adjusted towards the mandrel by a set bolt threaded to the body. The active face of the jaw l is substantially V-shaped, as

shown in Figure 4, and the lower walls of the openings 5 are correspondingly shaped so that the mandrel may be eifectively supported for rotation with endwise movement and with a desired drag thereon. A pin or handle 9 is secured to the jaw and extends through a slot Ill in the body for lifting the jaw l away from the mangrel after the jaw has been released by the set olt 8.

A lever II is apertured to receive the mandrel and is removably secured to said mandrel by a 5 set bolt I2. The lever II has a handle I3 whereby the mandrel may be conveniently rotated. The lever II adjacent the apertures thereof is provided with an enlargement to receive a set bolt I 4 .and said enlargement is provided With 10 an opening I5 to receive one end of a wire to be coiled about the mandrel. The set bolt I4 may be adjusted for securing the wire in the opening I5.

The body I adjacent the mandrel is provided l5 with an opening to receive a bolt I6 carrying spaced washers I1 to form a guide in the feeding of the wire onto the mandrel. By adjusting the bolt I6 in the opening of the body the grip of the washers Il on the wire may be varied. 20

An adjusting bolt I8 is threaded to the body and has an annular collar I9 fitting in a notch 20 of a slidably mounted adjusting bar 2I. The adjusting bar parallels the mandrel and is slidably supported by the body I and has removably 25 secured to one end a Wire engaging plate 22. The plate 22 has an inclined face or edge 23 engageable with the mandrel and also a convolution of the wire upon the mandrel. By adjusting the position of the plate 22 relative to the 30 wire feeder the relations of the convolutions relative to one another being formed in the wire on the mandrel can be varied so that the convolutions rnay be formed of different pitches. The plate 22 with its adjusting means forms a pitch 35 varying device and permits the forming of coil springs of different pitches upon the mandrel.

In operation, wire of a selected gauge and shape is passed through the wire feeder and secured to the lever I I and by rotating the mandrel 40 through the lever II the Wire will be caused to coil about the mandrel and by adjusting the pitch means the coil spring formed on the mandrel from said wire may be made of a desired or selected pitch. 45

Having described the invention, I claim:

A spring winding tool comprising a body having a chamber and provided with openings in opposite walls communicating with the chamber,

a mandrel mounted in said openings for rotat- 50 able and slidable movements, a jaw slidably mounted in the chamber to engage the mandrel, means for adjusting the jaw against the mandrel to permit rotation and endwise sliding movements thereof, a lever for rotating the mandrel 55 and adjustably and detachably connected to the latter, a wire guide carried by the body for directing a wire onto the mandrel, means for connecting one end of the Wire to the lever, a bar slidably mounted on the body and having a notch, a pitch varying plate carried by one end of said bar and engageable with the Wire on the mandrel, and an adjusting bolt threaded to the body and having an annular ange extending into the notch whereby the pitch varying plate may be adjusted endwise of the mandrel in either direction.

JOHN BLANER.

Images