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Патент USA US2135098

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Nov. 1,1938.
$135,098
w. P. BODIE
~
LET-OFF MECHANiSM FOR LOOMS
Filed May 7, 1938
2 Shée’cs-Sheet l
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Nov. 1, 1938.’
W. P. BODIE
.
2,135,098
LET-OFF MECHANISM FOR LOOMS
Filed May 7, 1938
2 Sheets-Sheet 2
Patented Nov. 1', 1938
_ 2,135,098
, v UNITED STATES PATENT OFFICE ~
2,135,098
LET-OFF MECHANISM‘ FOR LOOMS
‘
William P. Bodie, Newberry, S. 0.
Application May 7, 1938', ‘Serial"No.‘206,659v
5 Claims. ‘(01. 139-7167,)
This invention relates to a let-off mechanism 'tively engaged with a pinion 2 carried by a shaft
Brotatably supported by the frame F and extend-'
invention to provide means by which. effective ing laterally beyond a side thereof. Fixed, as at
I‘ strain or tension may be imposed automatically 4, for ‘rotation with the shaft 3 are the ‘disks 5
for looms, and it is primarily an object of the
videra tensioning structure for the beam includ
spaced apart as desired lengthwise of said shaft 3. '
_These;disks 5 are of desired radius and are
.provided in their opposed. faces withthe cir- -
ing a rotatable element in driven connection‘ with
cumferentially spaced and radially disposed
the beam and which carries a plurality of era
grooves‘ orchannels v6 which open through the , ,
upon the yarn beam.
,
It is also an object of the invention to pro,
i0l dially movable weighted members together with] peripheral edges of the disks 5 as is clearly illus
a brake shoe for coaction with said' weighted trated in the‘ accompanying drawings. ‘Each of
membera'said brake’ shoe being so mounted as‘
to'automatically moveaway from the axis of re
tation of the rotatable element as the diameter
15 of the thread upon the beam diminishes.
The invention consists in- the details of con _
the grooves; or channels 6 of a‘ disk 5 is parallel
struction and in the combination and arrange
in proper relation so‘ that there may be slidably
ment of the several parts [of my improved ‘let-off
engaged therein the guide ?anges 1 extending
outwardly from the weighted membersB. Each
mechanism’ for looms’ whereby certain important
20.» advantages'arel-attained and the device rendered
simpler, less expensive and otherwise more con-_
venient and advantageous for use, as will be
hereinafter more fully set forth.
'
The novel features of my invention will here
25.\ inafter be de?nitely claimed.
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I‘ In order that my invention may be the better
understood, I will now-proceed to'describe the‘
same with reference to the accompanying draw- ,
ings, wherein:—l
to a groove or channel 6 in the opposed face of
the second disks 5 or, in other words, the grooves
or ‘channels 6 of the disks 5 arezarranged in 15'
pairsrwith'the grooves or channels 5 of each pair .
of the members‘9 at‘the longitudinal center of
its outer ‘marginal portion is provided with a rel
atively large recess ID, the inner or bottom wall
I l of which is outwardly rounded in‘ order for the
most effective coaction with the arcuate brake
shoe‘ 8 which is received within the recess ll. of' 25
each-of the members 9 as the disks 5 rotate.
After the weighted members Shave been prop
erly applied between the disks 5, the extent of
their‘ outward radial movement is limited by con
' >
Figure 1 is a fragmentary view in‘ top plan
tact with the holding bands I2 which made
30
illustrating a let-off mechanism‘ constructed in - t'achablyv secured by the screws I4 or otherwise
as may be preferred to- the peripheral edge faces
accordance with an embodiment of my inven
tion and in applied position;
‘
‘
'
Figure 2 is a vertical sectional view taken sub
CO Cal' "-stantially on the line 2--2 of Figure 1 looking in
the direction of the arrow;
‘
,Figure 3 is‘a sectional view taken substantially
on the line 3—3 of Figure 1 looking in the direc
tion of the arrow;
Figure 4 is a fragmentary sectional view taken‘,
of the disks 5. These bands ‘l2, as is particularlyv
illustrated in Figure 4, are of a width suf?cient
to 'close'thefouter ends of the grooves or'chan
ne1s16 so that the'contact of thejflanges ‘I of
each of the members!) therewith is assured. ‘
"The brake shoe '8 is elongated and disposed
on desired'radius so that it can be maintained in
proper effective ‘position for. coaction with the 40
weighted members 9. This brake shoe 8 is ver
tically disposed and the lower end portion there
elevation of the structure illustrated in‘Figure 4 of is pivotally supported, as at l5, within a slot
l6 disposed ‘lengthwise through an elongated
with the retaining bands‘ omitted.
'
As, the present invention relates solely to the beam» IT. This beam I‘! has its inner end por
let-off mechanism in the accompanying »draw-~ tion ?xed, as at’ l8, to a rock shaft‘ l9.‘ This
ings I have only illustrated'so much of a loom ' shaft I9'is rotatablysupported by the frame F
frame as is necessary to properly set forth the‘ at a desired point in ‘advance of'the shaft 3
features of the let-off mechanism.‘
and is'disposedtransversely of the frame F. The
substantially on the line 4-—4 of Figure 2; ‘
Figure 5 is a fragmentary view in outer end
As disclosed in the accompanying drawings, F: shaft [9 also extends'a' desired distance inwardly
denotes the frame of a loom which'may be of
any‘ desired construction and which carries'in
any’ desired manner a yarn beam or warp beam
13. ' Each end portion of the beam B carries a gear ’
55;‘! ofv desiredradiuswhichis adapted to be selec
of? the frame F'and said inner portion of the
shaft» l9 has fixed thereto, as at 20, for rocking
movement therewith an arm>2l disposed toward;
the beam B; The outer or free end portion of
thiséarm 2| carries a shoe 22 for contact from
2
2,135,098
above with the thread or yarn wound upon the
be assembled and operated, and it will also be
beam B. This shoe 22 through the action of the
shoe 8 is automatically maintained in proper con
obvious that my invention is susceptible of some
change and modi?cation without departing from
the principles and spirit thereof and for this
tact with the thread or yarn on the beam B to
assure the requisite tension being maintained on
said yarn or thread at all times during a weaving
operation. The mounting 2|] of the arm 2| upon
the shaft I9 is such as to readily allow an adjust
ment of the arm 2| around the shaft l9 as the
10 requirements of practice may deem advisable and
necessary.
The pivoted or connected ‘end portion of the
arm I‘! is continued by an elongated tail arm 23
which has adjustably mounted thereon a bale
15 ancing weight or poise 24 which is maintained in
reason I do not wish to be understood as limit
ing myself to the precise arrangement and for
mation of the several parts herein shown in
carrying out my invention in practice except as
hereinafter claimed.
'
I claim:—
10
1. A let-off mechanism for looms comprising
a rotatable member having driven connection
with the rotating beam of a loom, weighted mem
bers carried by said rotating member and hav
desired selective adjustment through the instru
ing sliding movement radially of the rotating 15
member,_ said weighted members moving out
mentality of the clamping screw 25 or the like.
wardly of the rotating member as said weighted
Pivotally connected, as at 26, to the central
portion of the shoe 8 is the outer end portion
members move downwardly, and means under
control of‘ the thread on the beam for holding
20 of an elongated rod 21.
This rod 21 is'of a
length to freely extend through the} opening 28
provided in the outer portion of the ‘arm l1.
slidably mounted upon this rod 27 are the blocks
29 held to the rod 21 by the locking screws 30
25 or the like. These blocks 29 are formed to pro
the weighted members inwardly of the rotating 20
member as said weighted members move down
wardly.
,
2. A let-off mechanism for looms comprising
a rotatable member for driven connection with
the beam of a loom, a rock arm positioned ad
25
vide the opposed coacting cam surfaces 3| 'so
jacent to the rotatable member,>an upstanding
that upon rotation of one of these blocks 29
shoe carried by said rock arm, means associated
with said rock arm and coacting with the thread
on the beam to allow said rock arm to swing
away from the axial center of the rotating mem 30
ber as the diameter of the thread on the beam
around'the rod 21 with respect to the other, ad.
jus’tment may be had ‘of the tension of the coil
30 spring 34’ ‘encircling’ the rod 21 interposed be-'
tween the arm ~I'l‘and the lowermost block 29.
To r’otatably adjust either of these'blocks ‘29 it
is ‘omy necessary to release a clamping or hold
ing screw 30 and, of course, after the desired
35 adjustment ‘has been effected such screw may
again be tightened.
'
‘
V
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v The spring 34 provides means for constantly
urging the shoe 8 toward the shaft 3 and within
the recesses H] of the weighted members 9 as
40 such weighted members swing or move upwardly
as the disks ‘5 rotate._ As these weights or mem
bers 9 pass upwardly beyond the vertical center
theywill swing outwardly toward the peripheries
of the disks 5“ and thus provide su?icient retarda
45 tion to the rotation of the beam B to assure
' effective tension or resistance being maintained
upon the thread or yarn, as drawn from said
beam._
I
p
.
.
The ‘fuller the winding of the thread or yarn
50. upon thejbeam B the greater resistance must
be-imposed upon the thread or yarn by the shoe
22 under the action of the ascending weighted
members 9 and, therefore, upon the initial place
ment of a fully wound beam, the arm 2| will
55 raise the arm I‘! to bring the shoe 8 into a po
sition'to 'co'actiwith the ascending weighted mem
bers 9 ‘to move the same to their innermost posi
tions so that maximum tension will be imposed
upon the beam. However, as the diameter of
60 the thread diminishes the arm I‘! will corre-e
spondingly swing downwardly ‘and the shoe '8
outwardly from the shaft 3, thus permitting the
rising weighted members 9 to assume positions
further away from the shaft 3 to reduce the
65. tensioning action of the descending weighted
members 9.
e
,
The extent of downward swinging movement
of the arm I‘! is limited’by contact of said arm.
with the outstanding stop member 32 adjustably
70 held, as at 33, to the frame F._
From the foregoing description‘it is thought’
to be obvious that a let-oif mechanism for looms
constructed (in accordance with my invention is
particularly well adapted for use by reason of
75 the convenienceand facility with which itwmay
diminishes, weighted members carried by the ro
tatable member and free for sliding movement
in ‘a direction radially of they rotatable member,
said weighted members as they assume posi 35
tions away from the center of the rotatable mem
ber imposing, tensionc'on the thread as pulled
from the beam, said weighted members moving
in such direction as they travel downwardly, and
a shoe carried by the rock arm for coaction with 40
the weighted members to hold said weighted
members inwardly of'the rotatable member as
said weighted members move downwardly.
3. A let-off mechanism for looms comprising
a rotatable member for driven connection with 45
the beam of a loom, a rock arm positioned ad
jacent to the rotatable member, an upstanding
shoe carried by said rock arm, means associated
with said rock arm and coacting with the thread
on the beam'to allow said rock arm to swing
away from the axial 'center of the rotatable mem 50
ber
the diameter of the thread on the beam
diminishes, weighted members carried by the ro
tatable member and ‘free for sliding movement
in a direction radially of the rotatable member, 55
said weighted members as they assume positions
away from the center of the rotatable member
imposing ‘tension on the thread as pulled from
the beam, said weighted members moving in such
direction as they travel downwardly, a shoe car 60
ried by the rock arm 'for coaction with the weight
ed members tojhold said weighted members in
wardly of the rotatable member as said weighted
members move downwardly, said second shoe be
ing in pivotal connection with the rock arm, and 65
yielding means for resisting ‘the movement of
the‘ shoe in a‘direction away from the axial center
of the rotatable member.
4. A let-off mechanism’ for looms comprising
a rotatable member for‘driven connection with
the beam of a loom, a rock arm positioned ad
J'acent to the rotatable member, an upstanding
shoe carried by said rock arm, means associated
with said rock arm and coacting with the thread
on, the beamyto. allow said rock arm to swing
3
2,135,098
away from the axial center of the rotatable mem
ber as the diameter of the thread on the beam
diminishes, weighted members carried by the ro
tatable member and free for sliding movement
in a direction radially of the rotatable member,
said weighted members as they assume positions
away from the center of the rotatable member
imposing tension on the thread as pulled from
the beam, said weighted members moving in such
10 direction as they travel downwardly, a shoe car
ried by the rock arm for coaction with the
weighted members to hold said weighted mem
bers inwardly of the rotatable member as said
weighted members move downwardly, and a
15 counter-balance operatively carried by the rock
with'said rock arm and coacting with the thread
on the beam to allow said rock arm-to swing
away from the axial center of the rotatable
member as the diameter of the thread on the
beam diminishes, weighted members carried by 5
the rotatable member and free for sliding move
ment in a direction radially of the rotatable
member, said weighted members as they assume
positions away from the center of the rotatable
member imposing tension on the thread as pulled
from the beam, said weighted members moving
in such direction as they travel downwardly, and
a shoe carried by the rock arm for coaction with
the weighted members to hold said weighted
members inwardly of the rotatable member as 15
arm.
said weighted members move downwardly, said
5. A let-off mechanism for looms comprising
a rotatable member for driven connection with
weighted members having recesses in which are
received'the shoe as the weighted members move
the beam of a loom, a rock arm positioned ad
20 jacent to the rotatable member, an upstanding
shoe carried by said rock arm, means associated
upwardly.
'
WILLIAM P. BODIE.
Patent No. 2,135,098
Granted November 1, 1938
WILLIAM P. BODIE
The above entitled patent was extended August 21, 1951, under the pro
visiuns of the act of June 30, 19.30, for 4 years and 147 days from the expiration
of the original term thereof.
Commissions?‘ of Patents.
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