US1785603A

US1785603A - Segmental cam ring

Info

Publication number: US1785603A
Application number: US398019A
Authority: US
Inventors: Swinglehurst Harry
Original assignee: Scott and Williams Inc
Current assignee: Scott and Williams Inc
Priority date: 1929-10-07
Filing date: 1929-10-07
Publication date: 1930-12-16
Anticipated expiration: 1947-12-16

Description

Dec. 16, 1930. H. SWINGLEHURST S EGMENTAL CAM RING 3 Sheets-Sheet 1 Filed Oct. 7, 1929 INVENTOR HARRY SWINGLEHURST 3 71:15 a ZZar regs Dec. 16, 1930. H. SWINGLEHURST SEGMENTAL CAM RI NG Filed Oct. 7, 1929 5 Sheets-Sheet 2 INVENTOR HARRY SWINGLEHURST ?y k zb. aZZar-n Dec. 16, 1930. H. SWHNGLEHURST SEGMENTAL CAM RING Filed Oct. '7, 1929 3 Sheets-Sheet I5 E. E R N Q R v QM R w h E hm his R i E 7 INVENTOR HARRY SWINGLEHURST 9 his aiiarne ys Patented Dec. 16, 1 930 Qumran STATES PATENT" orrica HARRY swrneLEHURs'r, or ORANGE, new JERSEY, jnssrenon T seem AND VJIL- LIAIvIS, Ina, OF NEW onx, N. Y., A conroaa'rron or MASSACHUSETTS SEGMENTAL CAM RING Application filed (lctobel' 7, 1929. Serial No. 398,019.

1 bodied either in the cylinder cam ring or,in

the dial cam ring often referred to as the cam cap; It provides an improved arrangement of and way of joining the several arcuate sections which make up a segment of the cam ring and an improvedway of uniting adjacent segments, the objects attained being a simplification of the assembly operation and a simpler and more secure fastening together of the arcuate sectionsand of thesegments.

V In the accompanying drawings, Figure 1 is a partial view in elevation of the inner face of two adjacent segments of a cylinder cam ring embodying this invention. Figure 2 is a section on the line 2-2 of 20 Figure 1 but showing a part of the base structure below the cams.

Figure 3 is a similar view, the section being on the line 3--8 of Figure 1, or in other words it is an end view of one segment, thesection plane being between two segments. Not all of the cams are shown in this View.

j Figure 4 is a view in side elevation of part of the joint between two segments, the segments being partly broken away to show the key.

Figure 5 is a top plan view of a part of a I dial cam cap, showing two full segments and a third with two of the arcuate sections forming-it removed. 5

66 of Figure 5.

Figure 7 is a view in section on the line 7-7 of Figure 5 giving an end view of a segment.

Figure Sis a partial View similar to F iginc 3 showing a modification 1n the way of 1 arranging a key of thesort shown in Figures 3 and 4. I

V Figure 9 is a partial plan view of the same modification. v 1

Considering first the preferred way in which the invention isapplied to the construction of a segmental ring for holding the cylinder cams, I refer toFigure 1 where are shown two of twelve segments forming a full ring. Such segments'are used in a machine Figure 6 is a view in section on the line 7 having twelve yarn feeds and two types of needle, long and short, alternating about the cylinder. The cams are so arranged that the needlesof one typc knit at one feed while those of the other type knit at the next adj acent feed. Each ring segment carries a full set of knitting cams for effecting knitting, at oneyarn feedand thereforefofevery two adjacent se ments, one carries the knitting cams for one type of needle and the other has cams at a different level for acting on the butts of the other type of needle.

Each segment of the cam carrying ring here is built up of two equal length arcuate sections together with a base section forming t;

part of a ring and serving as the support for the segmental sections. The base section, that is, the bottom section and the one to which the others are secured, is an integral part of the gear ring 11 by means of which the cam ring is driven. It may be noted at this point that the horizontal portion of the gear ring, the part on which the gear teeth 13 are formed, lies outside of the cam circle and that the camsare mounted on the inner i 'face of the cam ring so as to be presented to the butts extending outwardly from the use dles. The gear ring is mounted in a well known manner on the bed plate and is driven by a pinion (not shown) engaging the teeth 13. The parts of the gear ring directly involved in the built up cam segments are the upwardly extending annular flange 10 on the inner rim of the gear ring and the horizontal part 10 of the ring just outside this flange. The parts of the ring that support one pair of arcuate sections will be referred to collectively as the base section of the segment. Y

The intermediate arcuate section 15 of the cam ring segment is cutjaway at the lower inside part in such a way that it fits against the outer side of the flange or rib 10 of the base section and presents a face above and flush with the inner face of the flange. The

part 16 of the cam ring segment 15 that lies outside (that is, to the left in Figures 2 and 3) of the flange 10 is slightly higher than the flange, With the result that the weight of the intermediate section is taken by the part l ofthe base section just outside the flange rather than by the flange itself.

It follows that the undersurface 17 of this middle section at the cut away portion just clears the top of the flange.

The upper or outer section 20 of the cam ring segment is similar to the intermediate section, being cut away on its lower inside face to rest against the outer-face of the intermediate section in the same way that above the innerfaces of the other' two sections. One or more bolts extend from the outer side of the outer section through the lower parts of both the intermediate section '15 and the outer section 20 and into the flange 10, in this waysecuring all three sections together and securing both upper sections to the base section. The head of the bolt lies in a countersink 26, itsouter end lying flush with or within the outer face of the cam ring, which is the outer face of the section 20. I

Certain related cam pieces are secured to each ring section according to a scheme which facilitates the assembly. 7 The base section carries all of the cams 30 which act to raise, or to limit the downward movement of, the long needles. The inner or intermediate section 15 supports the cam pieces 31 which lower, or limit the upward movement of, the long needles and also the pieces which raise, or limit the downward movement of, the short needles. The-cam pieces 32 which lower or hold down the short needles are mounted on the third or outer ring section 20.

Stating it differently, the cam pieces 30 on the base section 10 form the bottom of thecam track 33 for the long needles, those (31) on the inner or middle section 15 form the top of that track'and the bottom of the cam track 34 for the short needles, while the pieces on the outer section 20 complete the short needles track 34 by forming its top surface.

This applies either to segment A which has the knitting cams for the long needles orto segment B whichholds the knitting cams for the short'needles.

The arrangement of cam pieces on any track may be varied and in any event, is not part of this invention. It is worthy of note however thatseveral pieces shown here may be omitted aslthey serve only to limit the advancing or retraction of the needles and are not part of the knitting camsproper. They -There are two differences however.

are desirable however and for that reason are shown. "When therefore this description refers to cam pieces forming a track, or either surface of a track, it means the track in so far as there are definite surfaces causing, or

marking a limit on, the movement of the needles. I The cam pieces are held to the seg- 'sections together'by means of the screws 25,

I provide keys of a particular sort set in keyways in the adjoining end surfaces of the segments. Thesekey-ways may enter either from the side (Figures 3 and 4:) or from the top (Figures 8 and 9) and are in the part of the carn'ring remotefrom the screws 7 securing the sections together.

It will be understood that the sections forming the ring segments are made most easily from full rings which are cut to give the arcuate sections. Beforecutting the ring from which. the outer sections 20- are'to be made, series of holes are drilled,'tapped and countersunk in the side face of the said ring, each hole being on the line where the cut is to be made, with the result that each end surface of a section has a large anda small semi-circular groove forming half of a countersunktapped hole. A screw to forms the key to co-operate-with the splinelthus 'formedand when the sections are in place on the base section, this key is threaded into the hole formed by the two half taps in the adjoining end-surfaces. The threading is primarily to hold the key in place as it is not desired to put any considerable stress on the threads.

The primary securing comes about from the fact that the inner end surfaces 41 of the large grooves 42, formed by the countersinking described above, are beveled from their respective outer edges to their inner edges to give convex faces. The

inner end surface 43 of'the head of the key 4.0 is oppositely beveled to give a concave surface whichengages theconvex end faces of the countersunk grooves 42 and exerts a binding force preventing separation of the segments. The same idea may be used when there is a nut forming the head with the concave surface, the nut being set in a recess formed by enlarged grooves connecting with the threaded grooves and so arranged that I p i the screw key draws it against convex end one section to form a particular shape of cam surfaces of the enlarged grooves. In Figures samesort of head with a concave inner face asv the key 40 shown in Figures 3 and 4. 7 Here the grooves 4:5 forming the key way are vertical,extending from the top edge ratherthan eifected by this keyiii) from-the" side edge of the outer 's'ection 20. The keys 44 also are differentin that they have-an unthreaded stem 46 beyond the threaded portion and have a closefit in a bore 47 continuous with the threaded partabove.

The stem 46 thus acts as a key in conjunction withtne bore 4L7. This gives a securing funcendsurfaces of the large grooves.

The prlncipal actions ofsuch keys are to resist what may be termed bursting forces and forces tendingto put the segments out of ahgnin'ent. These forces are caused byneedles gettingbent or out of theirs'lots' in s'uchaway as'to am against the needle cams 7 whereby they tend to push the cam segments outwardly; Tliis arrangement of keys in JCOIHUHC'UOD wlth the comparatively rigid mounting of the sections and 011 the base sectlo n gives a very satisfactory construction equlvalent tor practical purposes to a continuous cam ring, yet making it possible to have the desirable incidents segmental ring.

of a sectional,

The assembly of the ring followsthe placing of the needles ofboth types, longand short,'in their grooves 011 the needle cylinder." The needles being put in from the top,

theirinsertion isnot affected bythe presence-of the base section with its cams 3O fas-the needles do not have to go below the "level of these c-ams.-- Before adding the middle section 15, the long needles} are pressed down onto the cams ofthe base section and the short needles are' elevated above the level of the section 15 or any of I then brought up from the outside and as there are no needle butts opposite its cams there is i1o,difliculty in locating it against the flange 10. Short retaining screws may then be inserted in holesatthe side of thehole for the screw 25 and these hold the section in place while the outer section 20 is being put on. These retaining screws may 7 ment with the cams 31 thereon sothat they be left in place as an additional securing means is desired. The outer section 20, with its cams 32 in place, is next brought against" the middle section 15, but only after the} oftheinner stepv 52. In this case, there are short needles have been lowered into engagewill not interfere with the cams 32 on the outer section 20. 'With the two sections in building up the segments of the cam cap with only those changes made necessary ,or"

convenient by the fact that the dial cams are in a horizontal plane and the sections are curved on the inner and outer edges rather than on their side faces. The base section here is 'a part of the rim of a disc hav ing a hub 51 which turns with the central spindle. Its upper surface has a cutaway part in its, outer region forming two steps 52, 53011 which suitably shaped arcuate sections are laced. :Both lon and short needles are used onfthe dial, alternating about itas in the case of the cylinder needles, "and every other segment carries a set of knitting cams for acting on one sort of needle while the alternate segments carry each a set of cams for the needles of the other type.

The cam 55 which advances the long A needles or limits their inward movement is placed on the under side of the base section, that is, on the under side of the disc 50 near its rim, andare held by screws 57 threading in from the outer or upper surface. From this it will be seen that the part 56 of the base section forming the step 53 is a rib corresponding to the flange or rib 10 and that the end surfaces 58*, 58 correspond to the horizontal part 10 in the cylinder cam base piece section. The intermediate sec tion 60 with its cams 61, which form the outer side of the cam track 62 for the long needles and the innerside of the track 63 for the short needles, has a part cut-away which enables it to restv on the first step 53 011 the outer surface of the base section 56. Unlike the corresponding parts of the cylinder sec tion, the end face 64*. formed by this cutaway part of the intermediate, section rests against'the rim 65 of the flange 56 and the inner end surface 66 clears the end face 58 of the. step 53.

The'outer section/T0 iscut to fit on the intermediate section 60 and toeXtend also onto the inner step 52 of the base section. It is obvious that on analogy to the cylinder segments, there could be a single step on the base section, but as the outer section 70 bears against the rim 69 of the intermediate section and the. inner edge 71 of it clears the end face 58?.of the step 52, it is desirable to have some directbearing-of the outer section on the base section and here this hearing is between the lower or inner surface 72 of the outer section and-the upper surface separate screws '7 5, 76rholding the outer section and the intermediate section to the base section.- .Asin the cylinder segments, the

outer section carries the cam pieces 7 7 which either retract, or lmnt the advance of. the

-ishort needles and form the outer side of the cam track 63 for the short needles.

7 The assembly is'efl'ected in the same manher as that for the cylinder segments, the sections being brought up from the outer side toward the needles, with their cams in place and after the needles have been so set as to avoi'd interference with the cams.

circular slots. "The keyaction therefore is between the unthreaded parts of the keys and key-ways and the threaded parts serve to hold the. keys in place. The principal difference 7 between the keys used in thecap" and those in the cylinder ring is that the latter rely V principally on'the co-acting beveled faces to .hold the segments in alignment.

It is possible to vary many ofthe details of. the construction described and shown here and it therefore is the intent to include with- V in the fair scope of the followingclaims all constructions embodying the inventive thoughts therein set forth.

I claim:

3 1. A needle cam ring segment Comprising a base section with a rib presenting an inner face, an intermediate section resting against the outer face of said rib and presenting a face flush with theinner face thereof, and a third section resting against the outer face of the intermediate section and presenting a face flushwith the innerface. of the rib, said "sections being adapted-to support needle cams, and means for securing said intermediate'andsaid third section to the base section.

2. A needle cam ring comprising a memher with an annular rib, an arcuate section resting against the outer face of said rib and 4 presenting a face flush with the inner face thereof, and a third arcuate section resting against the outer face of said section and presenting a face flush with the inner facev thereof, said rib and sections being adapted to carry needle cams OILtl'lGlI mner faces, n combination wlth means securing said two sections to the rib. a I I s 1 3. A needle cam rlng comprising a mem her with an annular rib, a series'of arcuate forone type of needle,the intermediate section carrying the cams forming the other side of that track and also one side of thetrack 4 for the other needles, and the outer section carrying the cams for theother side of-the second track. a

5. Inca segmental camring, semi-circular rooves in adj oining' faces oftwo segments, orming a key-Way, anda key for co-operation therewith, said key. and key-way being i threaded and screwed together for a part of their length. I

- 6. In a segmental cam ring, two segments having in adjoining faces semi-circular groovestogether with enlarged semi-circular recesses connecting with sald grooves and providing convex end surfaces, in combina tion with a threaded member for reception in said grooves and a head adapted to be drawn against said end surface by said member, said head hav ng a concave' -end surface for ens gaging the sa dconvex surface,

7 In a segmental cam ring, two segments having in ad o1n1ng faces grooves, forming together a threaded recess with a convex end surface, in combinationwitha threadedkey having a concave end surface with its concave surface engaging said convex surfaces 8. Ina segmental cam ring, two segments having in adjoining faces grooves, forming together a threaded recess, in combination with a threaded key, said key and recesshaving co-operating beveled facesholding said segments together. 5 i 1 V r In testimony whereof I have signed my name to this specification.

HARRY SWINGLEHURST.

-- sections resting against the outer face of said v I rib and each presenting a face flush'with the inner face of said rib, a second series of sections resting against the outer faces of said first series andeach presenting a face flush with the inner face of said'rib, said rib and said sectionwbeing adapted to carry needle cams on their inner faces, *in combination with means securing said section to SELldIlb, and key means'between ad o1nmg' sections.

' 4. A needle cam ring segment comprising 7 a base section, an intermediate section resting against the base section and an outer section against the intermediate section, all three I presenting inner faces flush with one another and carryingca'ms for co-operationwith long and short needles, the base section carrying the cams forming one side of the cam track