US1646771A

US1646771A - Feed collet

Info

Publication number: US1646771A
Application number: US157681A
Authority: US
Inventors: Irving H Sheffer
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-12-29
Filing date: 1926-12-29
Publication date: 1927-10-25
Anticipated expiration: 1944-10-25

Description

, Oct. 25.1927. 1,646,771

I. H. SHEFFER FEED COLLET Filed Dec. 29, 1926 Patented Oct. 25, 1927.

U NI TED L STA. T ES PJAT OFTFII ravine n. snnrnnn, or nconsn nrenrean FEED COLLE'I:

, Application filed December 29, 1926. SerialLNo.,157,681.

This invention relates to improvements i 4 from the annular portion. 3 and. is flexed feed collets generally employed. for feeding stock through hollow spindles of automatics or. other metal working machines, and has particular reference to feed collets provided with pads adapted to come directly in contact with the stock.

It is an object of the invention to provide a one-piece feed collet having a longitudinal resilient finger adapted to hold both sections of the pad in position within a front split collar integral with the collet, and to provide supporting means extending partly around the pad sections behind, and spaced from, the split collar so that the pad is held against movement exceptfor the limited: amount permitted by the resiliency of the collet and its split collar and supportingineans.

Another object of the invention isto pro vide a feed collet having a pad therein which can be cheaply manufactured and speedily inserted or removed.

\Vith these and other objects in view, the invention is hereinafter more fully described with the aid of the accompanying drawings, in which:

Figure 1 illustrates a side elevation of the invention, and

Figure 2 is an end view.

Figure 3 shows a plan view of Figure 1, and

Figures 4 and 5 are sections on the lines IVIV and VV of Figure 3.

Referring to the drawings, 1 designates the body of a feed collet having its circumferentially closed back end 2 threaded so that it may be attached to an operating membernot shown. Adjacent to the threaded end of the collet is an annular portion 3 forwardly from which the latter arms 4 extend. The outer surfaces of these arms are preferably of the same shape as the outer circum ference of the annular portion 8, and the arms are so spaced from one another as to leave a substantially semi-circular opening 5 between them for a purpose hereinafter set forth. The front ends of the arms terminate in a split collar 6. Circumferential support ing members 7 extend from each of the arms and on each side of the latter a short distance behind the split collar. These supporting members are each of such length that a gap 8 occurs on each side of the collet between the members integral with one arm and those 5 integral with the opposite arm. A resilient linger 9 extends forwardly between the arms inwardlyslightly towards its front unsupported end 10. This finger, which-usually.

projects substantially midway. around the circumference of the portion 3 between the arms .4 and opposite the opening 5, also has a circumferential outer surface similar to the outersurface of the annular. portion 8 of which it. forms a part. The whole colletis usually made ofseamless tubing, and the unrequlred. portions are cut away leaving the arms 4, finger 9, collar 6, and supporting members? allintegra'l with the annular portion. 3..

The pad 11, which, is generally made in two longitudinal.sections, isbored longitudinallly at 12w. suit the size and cross sec tion of the stock to be handled. Thefront end 13 of the pad is externally circular to fit within the split collar 6 and the supportmg member 7, and immediately behind the latter the pad is externally rectangular as shown at 14: but with the corners 15 rounded so that they will not project beyond the sides of the collet. The shape of the back of the pad prevents it form turning in the collet as the inner surfaces of the arms 4 bear against one of the flat sides of each of the pad sections, and futhermore a shoulder 16 is formed at the junction of the rectangular portion 14 with the circular portion 18 so that the back portions of the pad sections cannot pass forward within the supporting members 7. The front end 10 of the resilient finger 9 is flexed sufiiciently inwards to bear against a part of the back of both of the pad sections. In this manner the sections are held against longitudinal movement in either direction.

l/Vhen it is desired to remove the pad sections the finger 9 is flexed outwardly until its end 10 is clear of the pad sections then the latter are moved back until they are behind the supporting members 7 .When they reach that position it will be found that they can be removed through the opening 5.

'While in the foregoing the preferred embodiment of the invention has been described and shown, it is understood that the construction herein described is subject to such modifications as fall within the scope of the appended claims.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a feed collet, a body circumferentially closed at one end, forwardly extending resilient finger.

collar andsaidmembers.

arms integral with said closed end, a split collar in which said arms terminate at the opposite end of said body, and circumferential supporting members; extending from each of said arms on each side of the latter, said members being of such length that gaps are formed between their outer ends, and a resilient finger extending from" saidclosed end between said armsin combination with alongitudinally"splitpad held by, said supporting members, said split collar, and said 2. In a feed collet, a body circumferentially closed at oneend, forwardly extending arms integral with said closed end, a split collar in which the front ends of said arms terminate, circumferential supporting members integral with iand extending from each 7 side of said arms, and a resilient finger eX- tending longitudinally'from said closed end, in combination witha' paddivided into two longitudinal sections and'supported by said collar and said members, said resilient finger bearing against the back ofysaid split pad sections, and means for 'holdingsaid pad against forward movement through said 3. In a feed collet, the combination as de-' sections each being substantially semi-circular towards the front and adapted to slide through asplit collar of a feed collet, said sections having shoulders behindsaid front semi-circular portions adapted 'to against circumferential supporting members ofa feed collet by which the rear end of said semi-circular portions of said pad sections are adapted to besupported, said pad sections having flats externally behind said shoulder two of which are adapted to rest on longitudinal arms integral with said collet,and said pad sections when together having a longitudinal bore therethrough.

IRVING H. SHEFFER.

'bination oftwo longitudinal sections, said rest