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Патент USA US2127179

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Aug. 16,-1938,
2,127,179
R. H. LAWSON El‘ AL
MANUAL CONTROL FOR KNITTING MACHINES
Filed Nov. 18, 1936
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MANUAL CONTROL FOR KNITTING MACHINES
Filed Nov. 18, 1936
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MANUAL CONTROL FOR KNITTING MACHINES
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MANUAL CONTROL FOR KNITTING MACHINES
Filed Nov.- 18, 1936
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Aug- 16, 1938.
R. H. LAWSON ET AL
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MANUAL CONTROL FOR KNITTING_MACHINES
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MANUAL CONTROL FOR KNITTING MACHINES
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MANUAL CONTROL FOR KNITTING MACHINES
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Patented Aug. 16, 1938
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'UNITED STATES PATENT OFFICE
2,121,119
I
MANUAL CONTROL roaxm'rrmo
momma
»
Robert H. Lawson and William L. Smith, Jr.,
Pawtucket, R. L, aasignors to Hemphill Com
pany, Central Falls, R. L, a corporationrof
Massachusetts
'
~
Application November 18,~_ 1936, Serial No. 111,470
‘ In Canada January 20, 1936
I
14 Claims. 4 (Cl. cos-s)
'Ihe invention of this case deals with hand
wheel control of knitting machines, for instance
Fig. 14 is a detail of this same right hand
end of the machine but showing parts in their
mu1ti~feed knitting-machines wherein consid-
inoperative position.
.
erable e?ort is necessary on the part of the ma;
In multi-feed knitting machines; especially
5 chine operator to turn the moving parts of the those employing a relatively great number of 5
machine by hand as is necessary at certain times. feeding stations, it is necessary to employ hand
Among the objects of the invention are the pro- .wheel mechanism for operating the machine
vision of suitable reduction gearing whereby manually. This hand wheel drive must provide
large sized machines may be easily operated by sufficient reduction to allow the machine oper
1_0 hand, mechanism which provides adequate ator to turn the mechanism of the entire ma- 10
safety for the protection of the machine opera- chine while exerting.’ a reasonable amount of
tor and a device which is automatically disen- effort. It is also essential that the hand wheel
gaged upon power operation of the machine control or controls be conveniently located and
thereby to prevent any. damage of the machine that the hand wheels themselves be of a con
15 in the event of carelessness on the part of the
operator.
In the drawings:
at the side of the machine. Contrary to a
more or less common practice on hosiery ma
Fig. 1 is a fragmentary, plan view of as much
of a multi-feed knitting machine as is necessary
20 to illustrate the application of hand wheel control thereto;
Fig. 2 is an elevation, on a relatively enlarged
scale, illustrating the hand wheel drive of Fig. 1
in greater detail;
'
4
Fig. 3 is a section taken through the spindle
looking to the left, Fig. 2;
_
Fig. 4 is a sectional view showing the worm
in engagement with the ring gear of the machine;
Fig. 5 is an elevation showing a modified form
'30 of the invention;
Fig. 6 is a section illustrating the manner in
which the spindle as shown in, Fig. 5 may be
locked in an inactive position; -
,
Fig. 9 is a section on Fig- 8'taken through the
worm gear, spur gear and interconnecting hub; ,
Fig. 10 is an elevation illustrating the device
45 as seen from the face of the hand wheel;
Fig. 11 is an elevation of another form of the
invention showing the drive in operative posie
tion and, in the dotted lines, some parts in an
inoperative position;
that hand wheel, which in most instances it 25
could not due to the type of gearing employed)
at a. rate of speed which would constitute a
serious menace to the safety of anyone about
the machine. For this reason the hand wheel
control must be easily engageable when a ma- 30
chine operator desires to turn the machine by
hand but must be positively and automatically
disengaged‘ the instant the machine is started
Fig. 7 is a section showing the manner in
35 which the worm, Fig. 5, would engage the driving gear of a knitting machine;
Fig. 8 illustrates a second modi?ed form of the
invention wherein a single hand wheel conveys
motion to the ‘driving gear of the machine
40. through a worm, worm gear and an intermediate
spur gear;
chines, it is absolutely necessary that the hand
wheel control for these multi-feed machines be
disengaged from driving connection with the 20
machine at the instant said machine is started
under its own power; otherwise, as the ma
chine was rotated under its own power it would
drive the hand wheel (providing it could drive
25
50
venient size so as not to take up too much space 15
. -
Fig. 12 is a detail, partly in section, showing
the driving shaft in aninoperative position; .
Fig. 13 is a section taken through the right
hand end of the drive of Fig. 11, and showing
the shaft in position for driving the machine
55 by hand; and
'
under its own power. vIt is a further character
istic of the mechanisms herein shown that they 35
are practically incapable of being accidentally
engaged during automatic operation of the ma
chine, and even if they were, would merely
be returned to inactive position in the same
way in which they were returned to that posi- 40
tion at the starting of the machine.
-
Referring to Figs. 1-4 a form of drive has
been illustrated in which a worm is employed
to engage a driving gear of the knitting machine
at such times as the operator desires to turn it 45
by hand by merely rocking the hand wheel drive
or drives into an engaging position, rotating the
hand wheel to first take up slack and then for
the purpose of turning the machine throughout
such an extent as is desired, it then being a 50
function of the device itself to be moved back
to initial inactive position upon automatic op
eration-of the machine under power. The ma
chine illustrated has a circular base I, a rotat
able needle cylinder 2 having attached thereto 65
a ring driving gear 3, herein shown as a beveled
gear. It is to be understood that-other types
gear I and worm I! at the position illustrated
of gears are capable of being used and that it is
of safety and appearance.
within the scope of the invention in any one
of the modifications to apply the same to any
common type of gearing which may be used on
the machine. Further, we illustrate each. of
the hand wheel drives as rotating a movable
needle cylinder but in the event that such cylin
10 der were stationary and cams movable in\rela
. tion to the cylinder, the drives would of course
but is not an essential element except for purposes
.
We have illustrated in Fig. 2 a full line position
of all elements wherein the drive is shown vin
active position. Certain. fragments of the spin
dle worm, collars a'nd bearings have been shown 4
in dotted line position to illustrate the manner
in which the worm is rocked away from engage
ment withvgear 3 as soon as the machine is started
under its own power.
It is obvious that the
single threaded worm gives the machine operator
a sufficient mechanical advantage whereby he
to provide duplicate hand wheel control at both may rotate the machine by hand with a mini
mum of effort. It is obviouslyvimpossible for
15 sides of the machine and to provide each con
gear 3 to rotate the worm. It is only by pushing
trol with a hand wheel at either end. This pro
-vides an operator with four different wheels spindle l0 and the rest of the mechanism to the
left, Fig. 2, until the worm engages the teeth of
spaced about the machine‘ so that he can nor
gear 3, and by turning the hand wheel until stop
mally reach one wheel while working at any po
rotate the cams and not the cylinder. On the
largestmachine it is found ‘to be of advantage
20 sition adjacent-the machine and this is found to
be a time saver as well as a great convenience
ping screws I'I strike abutments 19, that the
mechanism becomes effective to rotate the ma
chine. These parts'are only maintained in that
position as long as the operator continues to turn
the hand wheel in a direction to rotate the ma
If for any reason the machine turns especially chine or until the machine is started; the instant
hard ‘as is often the case with new machines lust the machine is started, ring gear 3 will merely
assembled, more than one person may use the _ move worm i5, spindle III, etc., back to the dotted
when it is desired to watch the functioning of
any particular part of the machine and at the
same time to slowly turn the machine by hand.
hand wheel drive.
7
Now describing one individual drive at one side
line or inactive position. The hand wheel will
not be turned by the machine during this disen
gaging movement and in the event one should
80 of the machine of Fig. 1, duplicate brackets 4 attempt to engage the hand wheel drive during
are suitably attached to project below the circular
base I and are forked to provide bearings 5 at automatic operation of the machine, teeth of gear
their lowermost ends within which may rock lwould merely return the drive to the inactive
position in which said drive would normally re
angular, forked elements indicated at 8 and pro
. main under the in?uence of gravity.
85 vided at their forked ends with pins ‘I locked by
Now referring to Figs. 5, 6 and '7, a modification
means of set screws 8. These pins 1 project into
spindle bearings 9 within which a spindle I0 is of the invention has been illustrated in which a
‘free to turn. Each of the angular elements 6 spindle 23 having a worm 2t ?xed thereto is .both
has an extension ll within which 'is threaded an slidable and capable of rotating in bearings 25
formed as a part of brackets 26 suitably secured
40 adjusting screw l2 maintained in any adjusted
to the lower edge of the circular base i. This
position by means of locking nut l3. This ad
justing screw strikes against a projection ll cast spindle 23 may have a hand wheel at one end
onto one side of each of the forked brackets l or preferably at both ends similar to the con
and provides an adjustable stop to limit the swing struction shown in Figs. 1-4. The worm 24 en
of each element 6 in a direction to move spindle gages a bevel gear 21 attached to the rotating
l0 and worm i5 from driving position. The part of the knitting machine, which gear may
be of the typeshown in Fig. 4 or might be a
worm i5 is fixed to spindle Ill at about‘ its mid
point by means of a taper pin or by any other spur or any other gear suitable for the purpose; ,
the principle of the invention would not be al
suitable retaining means and said spindle is fur
tered thereby. A collar 28 is ?xed by means of
ther
maintained
in
proper
relative
position
by
50
means of collars l6 which, of course, may be set screw 29 to the spindle and maintains a ball
adjusted along the length' of the spindle for the
purpose of positioning parts in exact working
thrust bearing 30 in position to engage against
one end of the bearing 25 atthe right, Fig. 5,
when the hand wheel assembly is pushed to the
relationship. A ball thrust bearing 16' is inter
posed between bearing-9 and collar It at one end . operative position shown in full lines in that
of the spindle. At least one of the forked ends view. To turn the machine by means of the
hand wheel it is only necessary for the operator
of one of the element 6 is provided with an ad
justing screw ll maintained by a locking nut l8 to push the spindle, worm and hand wheel or
which screw bears against a lug l9. This adjust - wheels to the left, Fig. 5, until the worm engages
the teeth of gear 21 and then to turn the wheel
60 ing screw stops the movement of elements 8, the
spindle Ill and worm l5 when the worm has been until thrust bearing 30 engages against the bear
rocked into complete engagement with ring gear ing 25. Further turning of the hand wheel will
3 and serves to take the thrust as the hand wheel cause the needle cylinder or other rotating ele
drive is used to rotate the machine. A hand ment of the kniting‘ machine to advance in a
forward direction. ' When the machine is started
65 wheel 20 having a grip 2| is fixed at each end
under its own power this hand wheel assembly
ofspindle Ill.
‘It is obvious that only one of the extensions will be moved to the dot and dash line position
I I need be provided with an adjustable stop screw of ‘Fig. 5, this movement being in a direction
and that only one stop screw I‘! would suffice tangential to the pitch circle of the ring gear and
70 to permit satisfactory operation of the drive, but depending upon the size of the ring gear, will 70
in the preferred embodiment of the invention have to be enough to assure that the worm 24
we employ two of these stopping screws I'I within moves safely beyond a position where it would
one of the forked ends of both elements 8 and engage any of the teeth of the gear.
When moved to inoperative position the as
a screw l2 in both'extensions II. A guard 22
75 has been provided which covers a part of ring sembly will be held in that position against any 75
3
2,127,179
inadvertent movement by means of a latch 3i
engaging a groove 32 in the spindle. , ‘This latch
3! is pivoted at 33 and is held downwardly-against
the spindle by means of a spring 34' attached at
one end to the latch and at the other endv to a
pin 33 as shown. A collar 33 attached to the
end of the left hand bearing 2!. P18. 5, has a slot
31 within which the latch 3| works. This slotted
collar assists the screw 33 and latch 31 in over
10 coming the thrust of the spindle and attached
parts when any attempt is made to push it into
operative position without first lifting the latch;
thus said latch functions as a safety device against
inadvertent use of the worm 24 and ring gear 21.
15 As the assembly is'moved to inactive position
latch 3| will snap into the groove and prevent
movement by lowering one end of the shaft. The
b e i, driving gear 3 for rotating the cylinder
a d a guard 22 correspond to equivalent parts
in the first two forms of the invention described.
A shaft or spindle 62 has ?xed thereon a worm
63 which may be meshed with gear 3 and upon
rotation of the shaft and worm by a suitable
crank or hand wheel, will drive gear 2 and other
parts of the machine. This shaft 32 is rotatably
guided at one end within a bearing 64 formed 10
in extension of-a bracket 65 which is in turn
permanently fixed to the circular base of the
machine vl. This shaft carries collars 63 and 31
both adjustably secured along the length of the
shaft by suitable set screws or other attaching 15
means. A thrust bearing 68 is provided between
the spindle and attached parts from moving too collar 68 and the bearing 64 and serves the same
A guard 33 is attached ‘ purpose as bearingv 30, Fig. ‘5. This shaft 62
to the base I and encloses the worm and part must be capable of sliding 'and rocking to a lim
of the spindle. .
‘
ited extent within the bearing 64, and for this
Referring to Figs. 8, 9 and 10 another form of reason, that bearing will be formed with a certain
the invention has been illustrated wherein a amount of play for rocking the shaft as shown
hand wheel works through a worm and worm gear in Figs. 11 and 12.
to rotate an intermediate gear or pinion which
Now referring to the right hand end of Fig. II
engages the ring gear for rotatingthe machine. and to Figs. 13 and 14, a bracket generally indicat
To the circular base I we have attached by suit
ed by numeral 69 is attached to the underside of
able connecting means a plate 39 which has a the circular base. This bracket is constructed
. for in that direction.
boss or hub 43 projecting downwardly therefrom. ‘ in such a manner that it presents a depending
The spindle 4l_ having a head 42 is inserted with
in this boss and is held from rotating therein
by means of a pin 43. The said spindle serves
as a bearing upon which bracket 44 having two
arms 45 and-43 is free to swing. Hand wheel 41
having a grip 43 is fixed to a short shaft 48 which
projects through a bearing in bracket 44 and has
a worm 50 keyed or otherwise attached in such
a way it will not rotate thereon at the other end
of the spindle. A pin 5| passes through the ends
of arms 45 and 43 to provide a bearing upon which
a hub 52 may rotate, this hub having formed
integral therewith a worm gear 53 and a pinion
54. A spring 55 is attached to a pin 56 on one
arm of the bracket and to any projecting ele
ment such as a pin 51 attached to plate 39 so
45 that said bracket and the forked arms with the
attached hand wheel, worm, worm gear and
pinion will normally be moved to such a position
that pinion 54 will not engage a ring gear 58
which rotates the cylinder or other rotating ele
ment of the machine.
Whenever the operator desires to turn the
machine by hand, it is only necessary for'him to
forked portion 10 and ‘H at either side of the
shaft and a web 12, these forked ends 10 and ‘H
and the web 12 preventing movement sidewise
and also restricting the upward movement of
the shaft as shown. The said shaft has an elon
gated coliar 13 attached in the position shown
in Figs. 11, 13 and 14 and which bears within
the bracket, this collar also serving as an abut
ment to throw the shaft and worm into active
position, but will allow the same to rock or swing
downwardly upon starting of the machine under
power.
.
Each of these arms ‘Iii, ‘Ii is cored out to pro
vide an opening 14 and a slot at the bottom of
that opening within which is pivoted means for
raising the spindle 62 to level position and which
will allow it to drop to the dotted line position
of Fig. 11 when desired.
This mechanism con
sists of a rectangular block 15, projections at
either side thereof for engagement within the
bearing slots, a crank arm 16 and small handle
‘H. In the position of Figs. 11 and 13, the crank
has been turned to upper position whereupon the
rectangular block 15 has raised the spindle, and
thru collar 13, has pushed the same to the left,
Fig. 11 to engage the worm with the gear. As
the spindle is raised and tends to slide to the
grip the hand wheel and swing it from the dot
and'dash line position of Fig. 8 to such a position
that the teeth of the pinion engage those of the
ring gear, then to turn the hand wheel until ' left, it will be necessary to turn the hand wheel
said teeth have become fully engaged whereupon slightly to mesh the worm and gear until thrust
the recessed end 59 of arm 46 strikes against the bearing 68 moves up against the stationary bear
edge of base I. This recess 59 may be ground - ing 64. In that position the hand wheel may
oil! in such a way that proper intermeshing of be used to rotate the machine as long as desired.
When the machine is again started under
the pinion and gear will be realized. Whenever
power, the gear 3 still meshing with the worm will
the machine is started under its own power pin
cause it and shaft 62 to move to the right where
ion 54 and the entire swinging hand wheel assem
bly will be moved to inoperative position and will upon element 15 will be tripped to allow the
65 be held in that position by means of the spring right hand end of the shaft to follow as shown
55. A casing or guard 60 enclosing all parts in dotted lines, Fig 11, and further in Fig. 14.
except the hand wheel has been attached to From an inspection of Figs. 11-14 it can be seen
plate 39 and is provided with a .slot 6| through that the center about which crank 16 turns is off
which spindle 49 projects, this slot being of sum
set with respect to the center line of the rectan
70 cient size to allow the swinging of the wheel from gular block 15.
70
operative to inoperative position and vice versa.
This prevents the weight of shaft 62, worm 63
etc. accidentally tripping the block and disengag
ing the driving mechanism. This particular
is disengaged by sliding of the shaft and worm, - form of the invention comprises the advantages
75 and, at the same time, accompanying this sliding of forms numbered I and 2 but provides a very 76
Now referring to Figs. 11-14, we will describe
another form of the invention wherein the drive
4
2,197,179
simple way forv rocking one end of the shaft
downwardly and at the same time, sliding that
- shaft along its length until the driving worm has
ping means to limit movement of the swinging
members in both directions, bearings on the
swinging members and a shaft rotatable in said
moved‘ to‘a position in which it can not engage
the gear I. The reverse movement is likewise
bearings, a hand wheel fixed to the shaft, and a
worm on the shaft for engaging the ring gear,
whereby said hand wheel, shaft and worm may
effected with a minimum of effort. The mecha
nism itself is much simpler-and more easily man
ufactured than that ‘of either of the other forms.
It is to be understood that any one of the
10 modifications of hand operating mechanism may
be ‘used singly on a multi-feed or other knitting
machine or that several may be used on the same
‘machine. The hand operating mechanism may
be used on multi-feed machines or on any other
15 knitting or textile machines wherein it is deslr- .
able to manipulate the machine by hand and to
have positive actuating mechanism which will be
automatically disengaged but which can not be
accidentally moved to active position to cause -
any damage to the machine or to injure any em
ployee who is working on the machine. The in
vention has been described in more or less spe
ciiic terms for purposes of illustration only, and}
we are not to be limited except by the scope of
the attached claims.
be rocked into’ a position to drive the ring gear
and driven element and may be moved to in
active position upon power operation of the
10
machine.
7. In a knitting machine the combination of a
driving element and a ring gear attached thereto,
bearings attached to the machine and a shaft
rotatable and slidable within said bearings, a
hand wheel on said shaft and driving means
fixed thereto, means 'on the shaft for limiting
\sliding movement in one direction'in which posi
tion the driving means on the shaft will engage
the ring gear before mentioned whereby the ma
chine may be manually operated, but upon 20
power operation of said shaft, driving means and
hand wheel will be moved axially of the bearings
until said driving means disengages from the
hand wheel.
'
'
8. A knitting machine having in combination 25
a driven element and a ring gear ‘attached there
_
1. In a knitting machine of the type described, - to, bearings attached to the machine and a. shaft
arranged to slide and to rotate in said bearings,
a driven element and a ring gear for driving the
a hand wheel on said shaft and a worm fixed
same, manually operated driving means includ
We claim:
ing a worm engageable for driving said driven
element through the gear, said worm being au
tomatically disengaged upon power operation of
the machine.
'
2. In a knitting machine a driven element, a
ring gear for driving said element, and driving
means for engaging said ring gear including gear
ing capable of driving said ring gear but in
capable of being driven by the ring gear, said
gearing being engageable with the ring gear at
will and automatically desengaged therefrom
when the machine is started under power.
3. In a knitting machine the combination of a
driven element and a ring gear for driving the
same, manually operated driving means for the
ring gear including a shaft, a hand wheel and
bearings for said shaft, means driven from said
shaft to engage and drive the ring gear, said
means being manually engageable with the ring
gear, but positively disengaged from the ring
gear upon power operation of the machine.
4. In a knitting machine the combination of a
driven element and a ring gear attached thereto,
manually operated means for driving said ring
gear so constructed and operated that it may be
engaged with the ring gear at will but will auto
thereon for engagement with said ring gear, a 30
collar on the shaft for limitingits movement in
one direction and safety means functioning to
limit movement of the shaft in the other direc
tion and also to prevent its return except at the
will of the machine operator.
35
9. A knitting machine having in combination
a driven element and a ring gear attached thereto,
bearings attached to the machine and .a shaft
arranged to slide and to rotate in said bearings,
a hand wheel on said shaft and a worm ?xed 40
thereon for engagement with the ring gear, a
collar on the shaft for limiting its movement in
one direction and safety means functioning upon
said shaft including a groove for preventing the
return of said shaft-and driving means into en 45
Eagement with the ring gear except upon release
of the latch by the machine operator.
10. In a knitting machine the combination of
a driving element and a ring gear attached
thereto, hand operated means for driving the 50
element through the ring gear at desired inter
vals including a shaft and a worm thereon, said
shaft and worm being movable tangentially of
the gear to and from active position and means
for limiting the movement of said shaft and
matically disengage upon power operation of the , worm in either direction.
11. In a knitting machine, the combination of
machine and will remain in disengaged position
a driven element and a ring gear for driving the
throughout the period of power operation.
5. A knitting machine having in combination same, manually operated driving means for the
ring gear including a shaft, 9. hand wheel and
a driven element and a ring gear attached there
to, means for manually-driving the ring gear and bearings for said shaft, a worm on said shaft en
gageable with said ring gear, the construction be
element including a shaft, means thereon for en
gaging the driving and ring gear, bearings for. ing such that said shaft is slidable within its bear
said shaft being pivotally mounted in a pair of ings and also capable of being rocked about one of
swinging elements, said swinging elements being the bearings as a pivot thereby to disengage the 05
capable of maintaining the shaft and driving worm from the ring gear.
12. In a knitting machine, a driven element and
means in a position to engage and drive the ring
gear but being movable upon power operation of a- ring gear for driving the same, manually oper
the machine to a position wherein the ring gear ated driving means for said ring gear including a
shaft, a worm, a hand wheel for turning said 70
70 will not be engaged by the driving means. _
6. In a knitting machine of the type described, shaft and bearings within which said shaft may
turn, one of said bearings providing for the slid
the combination of a driven element and a ring
ing of said shaft lengthwise thereof, and the other
gear attached thereto for driving the same, a
pair of brackets attached to said machine, swing
’ing members pivoting on the bracket and stop
of said bearings comprising means for restrain
ing the shaft in a position wherein the worm may 75
2,127,179
engage the gear but allowing that end of the
shaft to be lowered, the combined sliding and
lowering of the shaft resulting in disengagement
of the worm from the gear.
_
13. In a knitting machine, a driven element
and a ring gear for driving the same, manually
operated driving means for said ring gear in
cluding a shaft, a hand wheel. a worm on the
shaft for engagement with the ring gear, bearing
10 means within which the shaft may rotate, said
bearing means being constructed to allow a com
bined sliding and rocking movement to be im
parted to said shaft thereby to disengage the
worm from the gear.
15
14. In a knitting machine, a driven element for
5
driving the same, manually operated means for
driving said ring gear including a shaft, a worm
?xed to said shaft for engagement with the gear, .
a hand wheel for rotating the shaft, 9. bearing at
one end of said shaft within which it may rotate,
collars on said shaft to allow sliding movement
of the shaft within the bearing, but to limit ‘the
extent of said sliding movement, bearing means
for said shaft at the opposite end including means
for restraining the shaft laterally and other 10
means for raising and lowering that end of the
shaft and locking it in raised position.
ROBERT H. LAWSON.
WILLIAM L. SMITH, JR.
15
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