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Патент USA US2135186

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Nov. 1, 1938.
.R; H, LAWSON ET AL
2,135,186
LAPPING MACHINE
Filed Feb. ‘8, 1937
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Nov. 1, 1938.
R. H. LAWSON ET-AL
‘2,135,186
LAPPING MACHINE
Filed Feb. 8, 1937
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Patented Nov. 1, 1938
, 2,135,186
' UNITED STATES’ PATENT OFFICE *
LAPPING MACHINE
Robert H. Lawson, Pawtucket, and William J ack
son, Central Falls, R. I., assignors to Hemphill
Company, Central Falls, R. L, a corporation of
Massachusetts
Application February 8, 1937, Serial'No. 124,628
'
3 Claims.
(01. 51_s2)
This invention is concerned with a machine
for abrading or lapping small openings‘ in ma
chine ,parts. More especially,‘the machine has
for a purpose abrading or lapping holes in yarn
guiding eyes or eyelets,'yarn feeding elements
and the like such. as employed ‘on knitting ma
chines or other textile apparatus. The invention
is hereinafter described with respect to, a simple
type of machine for the purpose, but is not lim
ited to the particular construction shown, the
Obviously this hand system leaves much to be
desired.
7
'
‘
According to the present method the eyelets or '
other elements which are to be lapped are strung
on a wire which is of a gage somewhat smaller .10
than .the opening to be polished.
embodiments of the same. The invention may be
put to any use for which it is found applicable.
mechanically 'reciprocated'to and fro through
the openings to be polished, the elements thus
polished being held against movement with the
wire, or in-other words, relative movement is pro 15
‘‘
a
Fig. 1 is an elevation of a simple form of lap
ping machine employing the-principles of the in
vention;
‘
‘
Fig. 2 is a plan showing a portion of the ma
. chine of Fig. 1;
20 _ Fig. 3 is a sectional view of one of the recipro
cating wires having a plurality of yarn guiding
eyelets thereon in position to be lapped;
Fig. 4 is a plan view similar to Fig. 2 but show
‘ ing a support used when working upon elements
25
or other imperfections which exist between ends
of the opening, especially in instances where the
eyelet or other element has an appreciable length.
principles being equally applicable‘ to‘ many other
In the drawingsfr
15
'
ing aperture at the ends, but does not. have any
appreciable effect in obliterating the tool marks
other than eyelets;
v
r
Fig. 5 is an elevation showing a detail of the
supporting structure adjacent the ends of the
machine;
a
.
Fig. 6 is a section showing in detail the man
ner in which the abrading wire is preformed and
the manner in which it engages'within the open
ing in a yarn guiding eyelet.-
-
‘
~
\
'
This wire‘is
vided between- ‘the Wire and the elements to be
treated. The wire is to be coated with some sort
of polishing or abrading material such as emery
paste or any other substance suitable for the
purpose. During the process this paste may be 2.0
renewed at intervals as necessary. The eyelets
will have a movement about the wire as the oper
ationprogresses, especially'wherein the wire is
kinked laterally or preformed in some speci?c
way. This lateral kinking of the wire assures
that the lapping paste will be distributed at op
posite sides of the opening to be polished and.
further, as will be described later, assures that
all'sides of the opening as well as all points
along the'length thereof will receive a similar
amount of treatment.
‘
The method previously employed’ involved a
In all types of textile machinery eyelets and separate and distinct treatment of each indi
other yarn or thread guiding elements vare used, vidual article and thus due to the expense, very
35 these elements generally having a small circular little time could be spent on single eyelets. With 35
opening through which the yarn or thread is this .machine a great number of eyelets are
passed, and when these eyelets or elements are ‘strung on each wire and many wires are recipro
made of metal it is customary to perform some cated simultaneously so that the process may be
sort of an abrading or lapping operation on the carried over a considerable period of time at ‘a
40 inside and on the ends of the-circular openings saving and at the same time, with decidedly bet 40
'
so that ?ne yarns will not be damaged as they ter results.
are drawn therethrough. One customary method
Preferably, the wire would be formed some
of performing this operation has been that of
holding'the eyelet or other element such as a ~
45 yarn guiding ?nger or the like within a suitable
what helically, said helixes being of much great
er pitch than diameter. 'The slight helical for
mation of 'the wire, as shown in Fig. 6, makes it 45
holder and pulling astrand of abrasive material
possible for all of the opening in the element
such as emery cord‘ back and forth through the
opening until the same appears to be satisfac
which is to be lapped to be contacted by the wire
and to be a?ected by the lapping action thereof.
torily smooth. These'openings through which
Not only .will the ends be polished and slightly
rounded, butthe central part of the opening will 50
the yarn is threaded are usually drilled in the
metal:_.and. the tool marks leave rough projec
be treated to an equal degree, this having been '
tions easily discernible tolthe naked eye which , practically impossible by the methods formerly
are particularly damaging to, the ?laments of ?ne employed.
_ Now referring to the ?gures, one simple form a
yarns passing therethrough. The method as em
of the invention is shown‘ wherein two upright’ 55.
55 ployed by hand results in a fairly smooth guid
2
2,135,186
supporting brackets I and 2 are permanently at
tached to a supporting table 3 standing on legs 4,
ticle to be abraded or lapped and pins or otherv
5 or upon any other suitable mounting. This support is herein. shown as made of wood but may
be constructed of any suitable material. The up
per ends of these brackets I and 2 are formed
tioned to receive those elements and present them
in proper attitude for the process" to which they
are to be subjected.
In Fig. 3 a plurality of yarn guiding. eyelets
guiding elements might be permanently posi
as illustrated in Fig. 5 to retain wire guiding ' such as are commonly used in textile machinery
bushings 6 and ‘I. These bushings will be abraded are shown threaded on the abrading wire and
or lapped, of course, and may be replaced at retained between the bushings 6 and 1. Any
10 intervals, it not being of any particular conse; ‘number of these may be abraded at one time so 10
quence as to the exact size of the opening in these "long as a su?icient number are threaded on the
bushings so long as the eyelets to be lapped may wire to assure that they do not merely move back
not pass therethrough. The upper ends of the and forth with it but are held more or less sta
said brackets are formed to accommodate the tionary'while the wire is reciprocated through
.15 lower half of a bushing while the cap'8 hinged at them. The ‘abrading wire I2 and the bushings 15
9 is formed to clamp down over the upper half 6 and ‘I will be of a dimension depending upon
of the bushing and is maintained in position by the particular article to be polished, that is, upon
means of a winged nut is screwed .down on the the diameter of the opening which is to be
hinged bolt II passing through a slot in the size treated. Several of these will be kept in stock
20 of the cap. The bushings 6 and 1 are shouldered
to be changed merely by inserting different wires 20
at either end to prevent movement within the
bracket and cap once they have been clamped.
An abrading or lapping Wire I2 passes through
both bushings and is secured at one end within
25 a connection I3, being secured therein by means
of a clamping screw I4. This connection is‘ ?at
in theconnections I3 and 21 ‘and threading the
wires through the bushings 6 and 1 which are
quickly clamped in the upper ends of the bracket
I and'2.
;
The wire may be preformed as stated, prefer 25
ably as a helix, as shown in Fig. 6, and in action,
one part of each helix as shown at 35 will be in
contact with one side of the opening to bepol
ished while opposite ends of that same convolu
tened and drilled to receive a shoulder screw I5
threaded into the upper end of lever I6 which is
in turn free to pivot. at IT. This lever is mounted
30 on an angular bracket I8 attached bymeans of
suitable connections to the support 3 and has
bearings I9 and 26 within the forked projections
thereof within which a shaft 2| is free to rotate
as it is driven by pulley 22 ?xed tothe shaft and
35 passing between the forked ends before men
tioned. An eccentric 23 is also keyed to the outer
end, of this shaft 2| and is rotated thereby as the
pulley is driven ‘by a belt 24 or by any other suit
able means.
The lever I6 projects at the other side of the
pivot I1 and is ?tted with a follower 25 in align
ment and bearing against the eccentric 23. The
said eccentric will serve to impart motions in one
direction to the lever I6 and a corresponding
movement to the abrading ‘or lapping wire- I2.
The return movement of this‘ wire and attendant
part is effected by a tension spring 26 attached
at one end to a connection 2‘! at the opposite
end of wire I2 and at its other end, to a hook
28 or other suitable connecting element. This
hook is ?xed within a bracket 29 also permanent-l
ly secured to- the support 3, said hook and the
upper end of lever I6 being in substantial align
ment with the centers of bushings 6 and ‘I.
Referring to Figs. 1, 4 and 5, each bracket I
55
and 2 is also provided with supplemental support
ing brackets 36 and 3!. These are adjustably
attached to the ?rst mentioned bracket by means
of screws or bolts 32 passing through elongated
60 slots in said supplemental brackets. A plate 33,
Fig. 4, is to be supported by these supplemental
brackets, being attached thereto by any suitable
connecting means, and ?ts up under the ‘abrading
or lapping wire I2 to support any elements of
65 appreciable weight such as would tend to hang
downwardly upon the wire and be abraded at one
side much more than at the other, thisresul'ting
in an elliptical or non-circular opening. In the
particular example shown the plate is being used
70 to support yarn guiding ?ngers such as shown at
34, these ?ngers being held between pins or
screws provided for that purpose. Preferably one
of these plates which is easily detachable from
the supplemental brackets would be made up as
75 a sort of ?xture for each particular kind of ar
tion of the helix as shown at 36 and 31 bear at 30
or substantially at the ends of vthe opening and
at the opposite side thereof. Thus as thewire
which is to be somewhat resilient is drawn
through the opening, not only the ends but also
the central portion thereof will be affected by ‘the 35
lapping compound on the Wire. Obviously, Fig. -6
illustrates a section taken in one plane, but if
any other section were to be taken the same ‘con
dition would prevail at some point, in other
words, each convolution of the helix acts "to
abrade all points-on the surface to be polished
as the wire is drawn therethrough. Since the
action of polishing is practically the same along
the entire length of the object to be polished, the
time consumed in completing the operation will
be a minimum since it is not necessary to'abrade
45
the ends excessively with the hope of having
some effect at the center.
This has been‘ done
heretofore when drawing the ordinary strand
of emery coated material through by hand, these
strands as furnished not having any helical or
kinked conformations.
.
'
In the particular illustration of the invention
herein presented only one abrading ‘wire has been
shown. It is obvious that a battery of these 55
wires may be employed, several eccentrics 23_-and
levers I6 being mounted at spaced intervals and‘
the other necessary supporting and guiding ele
ments being multiplied in accordance with *the
number of stages provided on the machine. 60
Other means of imparting reciprocatory move
ments to the, wire will be obvious to those skilled
in mechanical movements, it being quite possible
to substitute cranks or a crank shaft to which
the connections I3 or similar connections ‘might 65
attach, and the shaft 2I or other driving element
may be rotated in any convenient way.
The bushings 6 and ‘I may be constructed in
slightly different form and provided with several
openings so that a corresponding number of 70
wires may be reciprocated through each pair of
bushings, one lever I6 and one spring 26 serving
to care for many wires and thus’ an increase in
production on the ‘machine without any notice
able complications thereof.
3
2,135,186
The invention has been described as applicable
to abrading or polishing eyelets or other instru
single strand of polishing wire kinked laterally
and threaded through bushings in, said support
mentalities having yarn guiding openings therein
ing frame, and means for reciprocating said
wire to and fro through the bushings.
such as might be commonly used in textile’ ma
chinery. The invention is not limited thereto but
may be used to abrade or polish openings in any
articles of manufacture wherein it is found prac
ticable. The invention is not to be limited ex
cept by the scope of the appended claims.
10
We claim:
.
1. A machine for polishing openings in ma
chine elements including a supporting frame, a
2. A polishing machine as de?ned in claim 1
wherein said wire is laterally kinked in a plu
rality of planes.
>
3. A polishing machine as de?ned in claim 1,
wherein said polishing wire is preformed as a
helix.
>
.
ROBERT H. LAWSON.
WILLIAM JACKSON.
1.0
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