US963512A - Spring-winding device. - Google Patents

Description

- s. BUTTERWORTH.

SPRING WINDING DEVICE. APPLIOATI ON FILED OUT. 7, 1909.

963,512. Patented July 5, 1910.

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srnmmwrnnine DEVICE.

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To all whom it may concern: I

Be it known that. I, SAMUEL dlesex and State of ll'lassachusetts, have invented certain new and useful Improvements in Spring-Winding Devices, of which the following is a specification.

This invention relates to spring winders and has for its object to 'provide'a handle adapted to be combined, with a revolving" mandrel for winding a'helical spring on the mandrel. I a in One of the principal features of the invention is a gage adapted'to' intervene between two convolutionsof the spring and to sepa rate them, and adapted to'be adjusted to various positions so as to vary the amount of; separation. The gage is" otherwise adjust-.-

Vice for winding either right or left hand springs.

Another feature of the invention is an ad-' justable tension device for guiding a wire to the mandrel and for imposing the desired tension thereon. By means of this device, va-

rious sizes ofwire may be wound with equal facility and various diameters of helices may be produced by employing mandrels of different diameters. The device includes adustable means for embracing mandrcls of various d ameters wherebyv it is adapted to produce helices of various diameters.

-Of the accompanying drawings which illustrate one form in which the invention may be embodied, Figure 1 is an elevation of a spring winding device applied to a mandrel in the act of forming a helical spring thereon. Fig. 2 is a transverse elevation thereof. Fig. 3 isa section on line 3.3 of Fig. 2.. Fig. 4.- is

' a section on line 44 of Fig. 2. Fig. 5 is an elevation'of the working end of the device without the adjustable mandrel-engaging members. Fig. 6 is a perspectiveview of one of the adjustable mandrel-engaging members. Fig. 7 is an elevation of a portion of the device similar to Fig. 1, asapplied to a mandrel of larger diameter.

The same reference characters indicate the same parts wherever they occur.

On the drawings 10 representsa handle formedwith an opening 11 extending therethrough for the reception of a mandrel 12.

s ec-means Letters'rat'ent.

Berries wonrn, of Somerville, m the county of lh'iKl- Theopening 11 is preferably angular and arranged so that the angle 13 thereof" is central. .The openingis preferably of such diameter as to receive a mandrel of maxi mum diameter, and the devlce is adapted to embrace mandrels of-various diameters by reason of being provided with one or more adjustable plates 14. In this form of the device, two plates 14 are provided and are clamped against opposite sides by means of clamping bolts 15. The plates are formed with slots 16 through which the shanksof the bolts 15 extend, and which render the plates adjustable toward and from the angle 13 of the opening 11. The

. -plates'are also formed with central'angular notches 17 which register with the angle 13.

The plates embrace the mandrel and center v the device squarely with relation to the man drelQ The wire-of which the helical spring is to be formed is indicated at w and is drawn through between flanges on the grip of the handle from which it passes over a series ofstraightening pins 19 afiixed to the handle, and then over an adjustable tension member 20 and thence to the mandrel. The

mandrel maybe provided with an aperture '21 for, the reception of the starting end of the wire :2 for the purpose of firmly'attaching the wire to the mandrel so that, when the mandrel is driven, it may drawthe wire through the straightening pins and over the tension device 20. The member 20 is adj ustable and may be positioned with relation to the mandrel so as to vary the tension of the wire and thereby cause theconvolutions 22 to embrace the mandrel more or less closely as desired. The tension device is formed as a head at one end of a shank 23 which extends through the handle 10 parallel to the axis of the opening 11. Between the I Patented July 5,1910. I Application filed October 7, 1909. Serial No. 521,4.65.

head 20 and the shank 23 is a flangeor 'col-.

lar 24.- adapted to clamp one side of the handle, While a washer 25 and a nut 26 screw-threaded upon the other end of the shank are adapted to clamp the other side of the handle and secure the tension device at any desired position about its axis. As shown by Figs. 2 and 5, the head 20 is of irregular outline and its point of contact with the wire a: may be adjustable toward or from the mandrel by turning the shank 23 in the handle.

In order to produce'what is sometimes called an open spring, thatfis a spring in which a space is provided between the convolutions 22, a gage isprovided fordeterminin the spacing of the convolutions. On the rawings, the ga e is indicated at and is formed of a ro or pin provided with a chisel-shaped end 31. The gage is may intervene between two convolutions of the spring, and for thisgpurpose a holder 32 10 is provided and forme with an aperture for therec'eption of the gage and with a set screw 33 and clamping block 34 (see Fig.

its axis and clamped at any position by the screw 33 and block 34. Not only is'the gage ,movable about its axis, but it is movable longitudinally thereof and is therefore adapted to be set at a greater or less distance relatively to the mandrel. The holder '32 is adapted .to be adjusted so thattheend 31 3). The gage is a'da'ptedto be turned about formed with a cylindrical shank 35 which may be inserted in either of two apertures 36 formed in the handle, one on either 'side of the longitudinal median line thereof.

-The handle isvpro-vided with screw-threaded holes 37 for the reception of a set screw 38 whereby the shank 35 may be adjustably secured-in either of the apertures 36. The holder 32 may be turned about itsaxis and .maybe adjusted longitudinally thereof and is therefore adapted to position the gage 30 at various angles and at various distances with relation to the handle. In practice it is desirable toposition the chisel-shaped end 31 so that it may intervene between the last ,two convolutions 22. The spacing of the convolutions may be determined in. either of two ways, namely by turning it about its own axis, rbymoving it longitudinally of its axis to give the effect of a wedge. 40

In practice the handle is fed longitudinally of the mandrel by coeperation of the gagewith the previously formed convolution 22', and the degree of feeding movement is-determ'ined by the adjustment of the gage which determines the spacing of the convolutions. On the drawings, the gage is adapted for use in producing a helix of left hand v lead, but it is adapted to produce a helix of right hand lead -when transferred to the. aperture 36 on the other side of the tension member 20.

It is apparent that the device herein described and claimed is adapted to produce a great many varieties of helical springs. Thespacing of the convolutions is determined by one adjustable member. The diameter of the helix is to-some extent determined by the diameter of the mandrel and is otherwise determined by the adjustment of the tension member while any desired size of wire may be employed and subjected to the desired degree. of tension by various combinations'of intertwining about the fixed tention pins 19. T

ose embrace the mandrel, and an adjustable member mounted on the handle and having 'a chisel-shaped end adapted to intervene between two convolutions on the mandrel and adapted" to beturned about its longitudinal axis so as to cause said chisel-shaped endto variably separate the convolutions.

2. In a device for winding helical sprin s on a mandrel, a handle adapted to loose y embrace the mandrel, an adjustable gage on the handle, an adjustable tension member on the handle adapted to guide the wire to the 1'. Ina devicefor winding helical slprings on a mandrel, a handleadapted to o y mandrel, and means on the handle for aflix-- ing the gage on either side of the mandrel.

, 4.]"In a device for winding helical slprings on a'mandrel, a handle adapted to oose y embrace the mandrel, a rotatably adjustable tension member mounted on the handle to engage the wire in cotiperation with the mandrel, and means on the handle for guiding the wlre to said tension member. 'In testlmony whereof I have afiixed my signature, in presence of twowitnesses.

SAMUEL. BUTTERWORTI-I.

Witnesses: I

ARTHUR H. .BRowN, P. IV. PEZZETTI.

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