Year: 1888

page_text: Date of Application, 10th Jan., 1888
Specification Accepted, 11th May, 1888
I, JAMES BOLTON, of 35 Madison Avenue, New York, in the County and State of
New York, United States of America, Engineer, do hereby declare the nature of
this invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:
:-
My invention relates more particularly to that class of sewing machines adapted to
form lock-stitches by means of rotating or oscillating shuttles co-operating with the
needles thereof, one of the principal features of my invention having reference to
improved shuttle-operating mechanisms by which either rotating or oscillating
shuttles may be positively held and driven without requiring races for them to run
in, and the objectionable friction and wear incidental to running the shuttles in races,
as heretofore, will thus be avoided.
My invention further comprises certain improvements in the feeding and take-up
mechanisms, as well as improvements in some other parts of the sewing machine
proper and it also includes certain improvements in the stand or table on which the
sewing machine is mounted, together with improvements in the treadle and driving
mechanism supported by the stand.
In the drawings Fig. 1 is a longitudinal sectional view of my improved sewing
machine fitted with a rotating shuttle held and driven by clamping arms' or levers by
which it is supported without a shuttle race.
Fig. 2 is an elevation of the front end of my machine with the face plate
removed.
Figs. 3, 4 and 5 are detail views of the shuttle and its operating mechanism.
Fig. 6 is an isometric perspective view illustrating the feeding mechanism.
Fig. 7 is a bottom view of my machine showing the shuttle and feeding
mechanisms.
Figs. 8, 9 and 10 are detail sectional views illustrating the feeding mechanism.
Fig. 11 is a sectional front view to illustrate a modification of my invention applied
to an oscillating shuttle machine and adapted to carry and operate an oscillating
shuttle without a race; and Figs. 12 and 13 are views similar to Fig. 11 but showing
the parts in different positions to illustrate the operation of passing the shuttle
through a loop of needle thread..

page_text: Fig. 14 15 a detail front view of the oscillating shuttle-driver and clamp, and
Fig. 16 a sectional view of the same.
Fig. 15 is a detail view of a modified form of cam for operating the shuttle
clamping arms.
Figs. 17 and 18 are detail views, from opposite ends, of the oscillating shuttle ;
and Fig. 19 an enlarged detail view to show the adjustable roller-stud on a shuttle
clamping arm.
Figs. 20 to 35, inclusive, illustrate the stand or table and the treadle and driving
mechanism supported thereby; all of which will be more particularly referred to
hereinafter.
The bracket arm 1 is secured to the bed-plate 2 in the usual manner and is provided
with bearing portions 3 for the driving shaft 4, the latter having a fly and pulley
wheel 5 to be engaged by a belt running from the driving wheel H of the stand. To
prevent any oil which may work out from the rear bearing of the driving shaft from
being spattered by the fly and pulley wheel, when the latter is in rapid rotation, I
provide the bracket arm with an extension 6 which surrounds the pulley but is
provided with openings for the passage of the belt. The inside portion of the lower
part of the extension 6 inclines inward and downward so as to form a conduit for any
oil which may be thrown out by centrifugal force as the wheel rotates, and thereby
conduct the oil down the inside of the arm to the usual drip pan beneath the
machine.
The driving shaft 4 is provided with ball-journals 7 which rest in concave bearings
or seats in the bearing portions 3 of the bracket arm; the said ball journals being
held to their seats by bearing screws 8 having concave lower ends to fit the said ball
journals. The said screws will thus effectually prevent any endwise movement of the
driving shaft and may be adjusted to tako up wear, when desired. To enable the
shaft with its crank and ball journals to be passed endwise through the arm to its
place, one or both of the openings 9 in the bearing portions 3 of the arm will
be made of sufficient size for this purpose.
.
The rotating driving shaft 10, journalled in hangers 11 beneath the bed-plate 2,
is operated from the crank 12 on the driving shaft through the pitman-lever 121
the pin at the lower end of which is connected by the link 13 with the crank 14
on the rear end of the said rotating shaft 10. The pitman-lever is provided with
a pivoted fulcrum block or slide 14 movable vertically in ways in a block 15
secured within the vertical portion of the bracket-arm, the said pitman-lever and
link imparting a differential rotary movement to the shaft 10 from the uniformly
rotating shaft 4 in a well-known manner. To prevent side strain the pin 16 at the
lower end of the pitman-lever 12' is arranged to overlap the pin 17 of the crank 14,
the ends of these pins being tapered or conical (see Figs. 1 and 7) so that they
may thus overlap without interfering.
At the forward end of the shaft 10 is the shuttle carrying disk 18 which may
be integral with or secured to the said shaft. The said disk has a rearwardly
extending flange 19 in which are pivoted the shuttle carrying and clamping
levers 20, 20ª, 20 and 20° shown, in the present instance, as elbow or bell-crank
levers. The said levers are provided at their forward ends with small fingers 21
entering small recesses or pockets in the periphery of the shuttle 22. The rear
or shorter arms of the said levers enter a groove in a stationary cam 23 and the
said cam is provided with a sleeve 24 by which it is secured in the hanger 11 of
the bed-plate 2, the shaft 10 passing through the said sleeve and cam. The lever 20°
which is at the heel of the shuttle, and which is therefore the last to be lifted from
the latter as a loop of needle thread passes, is surrounded by a guard 25 within which
the finger 21 on the said lever is withdrawn, as shown in Fig. 5, when the lever is
lifted from the shuttle, to prevent the diminishing loop of needle thread from catching
on the said finger or lever.
The shuttle holding levers are arranged at about 90° from each other on the
disk 18, and as three of them are always in contact with the shuttle. the latter is
always securely clamped and held thereby so that it is positively supported and

page_text: rotated without a race, and thus the usual friction between the shuttle and its race
is avoided.
From the foregoing it will be apparent that as the shuttlo operating shaft is
rotated the shuttle-carrying levers will be successively raised at the upper part of
their orbit by the stationary cam to permit the loops of needle thread to pass around
the shuttle. The lever 20 is placed slightly nearer to the lever 20 than to the
lever 20 to give sufficient time, after a loop has passed the said lever 20°, for tho
take-up to tighten the stitch.
It will be observed that the fingers 21 on the shuttle carrying levers, by entering
the recesses or pockets in the periphery of the shuttle, effectually prevent any lateral
or back and forward movement of the shuttle in the carrier. In other words the
shuttle is firmly grasped and held positively by the said levers so that it is impossible
for it to move except with the carrier as the latter rotates.
As I believe I am the first to successfully operate a rotating shuttle without a
shuttle race or driver by providing a carrier with a series of shuttle carrying levers
which are successively lifted from the shuttle, and between two or more of which the
shuttle is always firmly clamped and thus positively held and driven, I do not wish to
be understood as limiting my invention to the special form or to the exact number of
the said levers herein shown.
The shuttle 22 is provided with a central pin 26 which will support the bobbin
contained within a stationary bobbin-case 27, the upper end of the tension-device 28
for the shuttle thread entering a suitable recess or engaging a projection in or on the
shuttle slide 29 or the bed-plate 2 to hold the bobbin-case stationary while the shuttlo
rotates around it, the bobbin rotating within its case only to pay.off its thread as the
sewing progresses, as is common with rotary shuttle sewing machines.
The bobbin-case may be retained in place in the shuttle by a spring finger 30
depending from the shuttle slide 29, or in any other suitable manner.
The shaft 10 is provided with two feed-operating cams 31 and 32, the cam 31 being
embraced by a fork on a feed-operating lever 33 pivotally connected at one end to a
horizontal arm 34 of a feed rocker 35 herein shown as being pivoted on center screws
passing through lugs 36 depending from the bed-plate 2. The rocker 35 is provided
with vertical arms 37 in which is pivoted a rock-shaft 38 having horizontal arms 39
and 40, the former arm carrying the feed dog 41 and the arm 40 being forked
to embrace the cam 32 on the shaft 10.
The feed operating lever 33 is provided with a slot 42 in which is arranged a
movable fulcrum block 43 extending horizontally from an arın 44 secured to a
sliding rod 45 by a clamping screw 46 passing through the split upper end of
the said arm.
The arm 44 is steadied by a stationary rod 47 secured to lugs or
hangers 48 depending from the bed-plate 2 and in which the rod 45 slides.
49 is the feed regulating lever the forward end of which passes through a notch
in the rod 45 so as to be adapted to move the said rod positively back and forth
to adjust the fulcrum of the feed operating lever. The lever 49 is pivoted near
its center to the bed-plate 2 and is slotted at its rear end to embrace a crank-pin 50
formed on a feed regulating button 51 having a milled head or thumb portion (above
the bed-plate) by which it may be turned. The body of the button 51 is tapered or
conical, with its larger part upward, and fits in a conical or tapered holo in the bed-
plate. The portion 52 of the button 51 below the crank pin 50 forms a flange which,
being below the feed regulating lever 49, serves to hold the said button in place in its
seat in the bed-plate. By turning the said button the crank pin 50, working in the
slot of the lever 49, will move the said lever to adjust the fulcrum block of the feed
operating lever to different positions to regulate the feed.
From the foregoing it will be apparent that when the shaft 10 is rotated the cam 32
will vibrate the feed-operating lever 33 vertically; and as one arm of the said lever is
connected to the horizontal arm 34 of the feed rocker the latter will be operated to
cause its vertical arms 37, in which the rock-shaft 38 is pivoted, to move back and
forth horizontally; thus giving horizontal or feeding movements to the feed dog
carried by the arm 39 of the said rock-shaft. The rotation of the shaft 10 also causes

page_text: the cam 31 (working in the fork of the arm 40 of the rock-shaft 38) to operate the
said rock-shaft and raise and lower the feed dog; the cams 31 and 32 being properly
arranged relative to each other so as to effect a proper timing of the parts to secure
a four-mentioned feed all the movements of which are positive so that the feed is
strong and silent.
The driving shaft 4 is provided at its forward end with a double crank consisting
of the arm 53 having the pin or stud 54 provided with an extension 55 having a pin
or roller stud 56, the pin or stud 54 being surrounded by the upper end of the
pitman 57 connected to the needle bar 58 by the collared stud 59. To properly
lubricate the eye at the upper end of the pitman 57 the pin 54 is made hollow
and provided with one or more oil holes, and by filling the said hollow pin with
cotton saturated with oil the joint will be effectually lubricated for a long time.
The take-up 60 is carried by a sleeve or tubular rock-shaft 61 supported by a stud
or pin 62 screwed into one side of the head 63, said take-up arm extending outside
or in front of tho face-plate 64. The sleeve or rock-shaft 61 is provided with an
operating arm 65 having a slightly curved slot in which works the pin or roller
stud 56 of the double crank, and the said rock-shaft is preferably so located that its
center is in the same horizontal plane as the center of the driving shaft 4.
To secure a proper timing of the parts the studs or crank pins 54 and 56 are
arranged about 90° from each other, the latter following the former, but the exact
arrangement of these pins is not essential as the correct timing can be effected by
making the slot of the operating arm 65 more or less curved or irregular. By making
the slot of the arm 65 somewhat curved, as shown in the drawings, a better timing of
the parts is secured.
In the operation of my machine the needle descends and the loop thrown out there-
from is caught by the shuttle, and as the latter moves forward the take-up arm
descends giving up or yielding the thread to permit the loop to be properly expanded
around the shuttle; and when the body of the latter is about half through the loop
the take-up begins its upward movement quickly drawing up the loop out of the way
of the advancing point of the shuttle; the take-up operation being completed and the
stitch tightened when the needle is just beginning its descent for the next stitch.
Thus the whole take-up operation is effected during the time required for about a
quarter revolution of the driving shaft, the larger part of the movement of the take-up
being effected rapidly owing to the close proximity of the crank pin 56 to the center
of movement of the take-up arm; but when the operation of tightening the stitch is
approaching completion the said crank-pin has receded considerably from the take-up
rock-shaft, travelling in the slot of the operating arm, and the leverage of the said pin
on said arm is therefore correspondingly increased and the movement of the take-up
arm is correspondingly lessened, so that by the time the last pull of the take-up on
the thread, in tightening the stitch, occurs, the take-up has nearly come to a stop;
and there is therefore no sudden jerk on the thread when the greatest strain comes,
and the danger of breaking the thread by the take up is consequently reduced to a
minimum.
In the modification of my invention shown in Figs. 11 to 19, inclusive, I have
illustrated an improved mechanism for operating an oscillating shuttle without a race.
In the machine shown by these views the shuttle driver 66 is carried by a shaft 67
having an oscillating or reciprocating rotary movement as in the well known "Singer
oscillating shuttle machine, the said driver having two fixed arms 68 and 69, the
former being outside of the shuttle 70' and the latter inside of the shuttle or under
the beak thereof. 70 and 71 are the shuttle clamping levers, shown, in the present
instance, as having a common fulcrum on the screw pin 72. The said levers, in
connection with the arms 68 and 69, form two clamps of which, the said arms
may be said to be the fixed and the said levers the movable. jaws; the lever 70
and arm 68 forming one clamp and the lever 71 and arm 69 the other. 72¹ is a
stationary cam having a sleeve 73 by which it is secured in the hanger 74 depending
from the work-plate 75, the said cam being engaged by the roller-studs 76 on the
clamping levers, to operate the latter.

page_text: In the present instance the clamping lovers are forced positively against the shuttle
by the impingement of the roller studs 76 against the outer wall of the cam 72¹
and are released from the shuttle by the spring 77, the action of the latter being
more or less assisted by the centrifugal force incidental to the rapid oscillations of
the shuttle. I may, however, operate the clamping levers positively, in both directions
by a grooved cam 78, as shown in Fig. 15, but I prefer to use the spring for releasing
the clamping levers as it prevents the latter from rattling.
To take up the wear of the roller studs 76 the latter are preferably made eccentric
and held in adjusted position by the small set nuts 79 so that by loosening said
nuts and partially rotating said studs before again tightening the nuts the studs
may be brought into the desired relation to the operative wall of the stationary
cam.
The shuttle is provided at its beak and heel with shallow recesses or pockets 80, 81,
the former being engaged by a slight rib 82 on the inner side of the free end of the
clamping lever 71 and the latter by the free end of the lever 70, so that the said
levers can hold the shuttle from lateral as well as from forward and backward move-
ments in the driver. The shuttle may also have a pocket or recess 83, rearward of its
beak, for the reception of the point of the arm 68 to assist in holding the shuttle
firmly.
It will be observed that these recesses or pockets in the shuttle are provided
with end as well as with side walls so that the said shuttle will be held positively
from forward and backward movements in the driver as well as from lateral move-
ments therein. This construction might, however, be reversed by forming the
recesses or pockets in the clamping levers and providing the shuttle with ribs to
engage the same, this reversed construction being the obvious equivalent of the
construction shown.
The operation of this part of my invention is as follows: When the shuttle has
taken a loop of needle-thread, as shown in Fig. 11, the clamping lever 71 is released
from the shuttle so that the loop of needle-thread can pass freely around the beak of
the latter which is at this time held tightly between the clamping lever 70 and
the arm GS of the driver so that the beak of the shuttle is lifted slightly from the
arm 69 of the driver to make a free passage for the loop both below the beak as
well as between the same and the lever 71. As the shuttle and driver move
forward towards the position shown in Fig. 12, the lever 71 is clamped against
the shuttle, opening a passage for the needle thread between the rear part 84
of the arm 69 and the shuttle, as shown in Fig. 12, and while approaching this
position the shuttle is engaged by both clamping levers so that it is firm in the
driver, the lever 71 engaging the shuttle before the lever 70 is disengaged there-
from. As the shuttle continues its forward movement to the position shown in
Fig. 12 the clamping lever 70 is partly released so that there will be a loose passage
for the loop between the shuttle and the arm 68 of the driver and when the parts
have reached the position shown in Fig. 13, there will be a freo passage between
the shuttle and the said lever, as shown in said figure 13. The take-up now draws
up the loop around the beel of the shuttle and when 'the take-up has reached its
highest position to tighten the stitch the return oscillation of the driver will have
again brought the parts into a position in which the shuttle will be tightly held by
both clamping levers; so that when there is the greatest strain on the shuttle the
latter is held by both clamps.
It will thus be apparent that by the construction shown and described I am enabled
to operate an oscillating shuttle in a positive and efficient manner without a
shuttle race; and that, as the shuttle is always firmly clamped in the driver by at
least one of the clamping levers, its operation will be almost, if not entirely,
noiseless.
My improved stand or table and the driving mechanism supported thereby are
illustrated in Figs. 20 to 35, inclusive, in which A and A' denote the iron logs or
side frames of the stand, and B the table proper. Owing to the manner in which
the legs or side fraimės are cast it has heretofore been usual to drill the holes in the

page_text: .
legs for the screws by which the tables are attached to the said legs, as enclosed holes
could not be cast therein. To obviate the necessity of drilling these holes, and
thus lessen the cost of the stands, I prefer to provide ears a on both sides of the
top of the legs and to form notches a¹ in the said ears. (See Fig. 24 which is
a top view of one of the legs.) These open notches may be formed in casting,
and as I provide such notches on both sides of the legs the screws will brace each other
and thus secure the table and legs firmly together as strongly as is done by the screws
which pass through the enclosed drilled holes now generally in use.
C is a vertically movable support for the "head" or sewing machine proper. The
support C, which is preferably of wood, is provided with a metallic bracket c
having two guide rollers c¹ and c² in different horizontal planes, the said rollers
engaging opposite sides of a vertical supporting bar a preferably cast integral
with the leg or side frame A¹. To economize space and to steady the guide
rollers c¹ and c² as strongly as possible I prefer to form the said bar a² with a
groove on one side and with a rib on the other side, one of the said rollers fitting
in the said groove and the other being grooved to embrace the said rib, as shown in
Fig. 22. By placing the guide rollers one above the other they are better able to
resist the side strain incidental to sustaining the movable support and the machine
thereon entirely at one end.
The support C and the machine resting thereon are balanced by a volute spring d
within a rotary box D turning on the pin D' passing through a plate a³ cast integral
with the leg A', one end of the spring being attached to the lug d' on the said box
and the other end thereof to the stationary hub d² which is squared for the reception
of a ratchet-wheel d³ engaged by a holding pawl e to prevent the spring a from
unwinding. (See Figs. 32 and 33.) The pivot pin e' is preferably cast integral with
the pawl and is provided with a lug, e, and the plate a³, is provided with a notched
hole at (see Fig. 34) the notch of the said hole permitting the lug e² to pass through
the said plate. When the pawl is in operative position, as shown in Fig. 32, the lug
is turned upward away from the notch of the hole at and thus serves to retain the
pawl in place. As the lug e² and notched hole a* are formed in casting it will be
apparent that the pawl is ready for use as it comes from the foundry without fitting
or without drilling the plate a³ for its reception.
The pin D is held in place by a nut de between which and the end of the hub d² is
interposed a washer d'. When the said nut has been tightened against the washer
the hub d may be turned to increase the stress of the spring d by means of a wrench
applied to the said nut, and the stress of the said spring may be lessened by
disengaging the pawl e from the ratchet wheel d³ and permitting the spring to
partially rotate the hub in which the said wheel is mounted and to which the said
spring is attached.
The box D has a lug d to which is attached one end of a steel ribbon or strap d³
connected at its other end to a lug e on the bracket c, and thus the force of the
spring d is communicated to the said bracket and to the machine support C to which
the said bracket is attached.
To form a housing for the machine beneath the table B I provide on the front side
of the machine (or the side thereof on which the operator sits) two leaves b b which
are hinged together, the upper one of the said leaves being also hinged to the
underside of the table and the lower one thereof to the support C; the connection
between the lower leaf and the said support being made by a double hinge as shown
in detail in Fig. 27. When the machine is dropped within the stand, as in Fig. 20,
the leaves bare in the position shown in full lines in Fig. 29, but when the machine
is raised to the top of the table for operation the said leaves fold up as shown in
dotted lines Fig. 29 and are thus out of the way of the knees of the operator.
The back wall of the housing for the machine within the stand is preferably
formed by a panel 6' held in place. by being let into grooves in the back bars a³ of
the legs or side frames A and A¹ as shown by the sectional view, Fig. 23. As these
grooves are formed in casting it will be obvious that this construction is both cheap
and convenient.

page_text: The top of the housing for the machine within the stand is formed by the hinged
cover B which, when the machine is to be raised, is folded over as shown by dotted
lines, Fig. 20, to form an extension for the table as is usually done by an ordinary
drop-leaf."
"
The machine support C is provided with an ordinary spring latch e to engage the
table B and thus lock the support in place when it has been raised or lifted up by the
operator to bring the machine into operative position.
The treadle F is preferably mounted on a steel band or torsion spring connected
to loops embracing the central standards of the legs or side frames A and A', said
loops also surrounding the uprights g of the arched brace G; each of the said
uprights having two lugs or projections g¹ (see Fig. 20) which are let into recesses in
the said side frames, the lower projections being at the ends of the cross bar g³.
By this construction the spring, in addition to a support for the treadle, is also
adapted to serve as a tie for the lower part of the stand, the said spring and loops
being held in place by a single set screw f² which, when properly tightened, holds
the bottom of the stand securely together. As the loops are between the
projections the legs or side frames will be strongly braced and will thus make the
stand very stiff without requiring the larger cross braces generally in use. As the
recesses for the reception of the projections g' are cast in the side frames it will be
apparent that this construction is cheap as well as convenient.
The treadle is preferably hung to the spring by small plates f³ (see Fig. 21)
which hold the spring in recesses in the treadle. As the treadle is rocked, the spring
twists slightly, the torsional effect of the spring normally bringing the treadle to
such a position that the pitman F connecting the treadle to the driving wheel H will
be off the dead center so that the machine will always be ready to be started by the
treadle alone, thereby obviating the necessity of making the driving wheel heavier on
one side than the other to cause the wheel to normally assume a certain position.
In the modification shown in Fig. 30 the treadle F is hung on center screws g
passing through braces G¹ extending from the cross bar g to the tops of the
uprights g, the said uprights being secured to the side frames by bolts g³ between the
projections g. This construction resembles that shown by Fig. 20 in that the cross
bar is adapted to securely brace the stand by being provided with braced uprights
which have two bearings at the projections 7' against the central bars of the side
frames and which are connected to the said central bars between the said bearings or
projections by the bolts g*.
The bracing effect of the uprights g is further augmented by horizontal lugs or
projections which brace the side frames or legs against a tendency to twist, these
lugs being more clearly shown in the horizontal sectional detail Fig. 35.
The side frame or leg A' is provided with a dress guard consisting of the inwardly
curved arms a converging to form a hub a which serves as a bearing for the journal
of the driving wheel H. I form a compensating journal for the said wheel by
providing the hub a with conical recesses in which fit a conical hub of the driving
wheel and a conical head h¹ of a journal bolt h³ which is threaded at one end and
attached to the said wheel by a set nut 3. The conical recess a' in which the head h¹
fits is preferably somewhat deeper than the said head and is partly covered by a
washer so as to serve as a pocket to retain the oil by which the journal pin is
lubricated and thus keep the oil from soiling the dress of the operator.
The pitman F has ball and socket connections with the driving wheel H and the
treadle F, these connections being made by providing the right-angular end
portions of the said pitman with balls which are riveted to the said end portions,
said balls fitting in concave sockets in the projection . on the wheel and the arm f
on the treadle. The balls are held in their sockets by hollow screws through which
the end portions of the pitman loosely pass, the said screws being secured by set
nuts. By connecting the pitman with the driving wheel in the manner above
described, side thrust on the said wheel is largely avoided, the ball which is at the
point of connection between the pitman and wheel being inside of the line of the

page_text: outer end of the hub of the wheel. The compensating journal of the wheel permits
all wear at this point to be taken up, as will be obvious.
The wheel H is provided with an inclined cutaway portion 7 (see Figs. 25 and 28)
which will run the belt off from the wheel when the latter is turned backward, or, in
the direction indicated by the arrow 1, Fig. 25, and the said wheel is also provided
with a belt replacing device consisting, in the present instance, of a hook which
does not extend beyond the circle or periphery of the wheel and is. also within the
vertical plane thereof so as not to project laterally or horizontally beyond the said
wheel; and which, in connection with the enclosed belt guide or hole as in the side
frame or leg A, will automatically take up the belt and run it on the wheel when the
latter is revolved in the direction indicated by the arrow 2, Fig. 25, the said enclosed
belt guide or hole preventing the loosely hanging belt from escaping.out of the reach
of the said replacing hook.
The side drawers J of the stand are preferably supported by shelves, as K, attached
to the legs or side frames by screws & passing through perforated ears a on the said
legs into the said shelves. (See Figs. 20 and 31.) By providing the shelf K on its
upper side with a longitudinal rib k¹, (adapted to enter a groove in the lower face of
the upper drawer) and with under-cut ribs k² to engage longitudinal overhanging lips
at the top of the inside of the lower drawer the said shelf is adapted to support and
guide either one or two drawers, or two such shelves will answer for either two or
three drawers. Thus by this construction an agent can at short notice equip a stand
with any desired number of drawers and thus furnish such a stand as a purchaser
may wish without being obliged to carry a large stock of stands or tables of different
styles, as is now customary.
My stand may be provided with side drawers at each end, if desired, but I prefer
to provide the right hand thereof with a cupboard L closed by a horizontally swinging
door M at the top of which is a receptacle m for bobbins, spools of thread, &c. The
cupboard L serves as a housing for the supporting bar a² and the spring-containing
box D, and is preferably of proper size to contain battery cells in case it may be
desired to drive the machine by an electric motor.
The sewing machine "head" or machine proper is attached to the support C in any
suitable manner, and to raise the machine and its attached support the operator
merely takes hold of the bracket-arm of the machine and lifts gently, and as
the weight of the machine and support is balanced by the spring d the machine is
easily raised.
The strap runs on the periphery of the rotary box D which is preferably
large enough so that its circumference is equal to or greater than the distance which
the machine support or platform C will be raised and lowered in housing the machine
below the table of the stand or lifting it to its operative position, so that only a single
revolution (or somewhat less) of the said box will be made in raising or lowering
the machine. The volute spring d is long enough to have a large number of con-
volutions within the box D so that the force or tension of the said spring will not be
appreciably changed by but a single revolution of the said box, and thus the machine
support and machine, whatever may be their horizontal positions, will always be evenly
balanced by the said spring when the latter has been adjusted so as to have a proper
tension for this purpose.
Thus as but a single revolution (or less) of the box D will be made in raising
or lowering the machine, and as the force or tension of the spring is not appreciably
changed by the comparatively slight winding or unwinding of the spring, incidental
to this single revolution of the said box, the strap d may be run on the periphery
of the latter and a scroll or conical drum, such as has been sometimes used hereto;
fore, will not be required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I wish to say that I do
not confine myself to the precise details of construction set forth nor do I claim as
my invention all of the features of the machines herein shown and described separately,

page_text: excepting as indicated by the claims hereunto appended; but I declare that what i
claim, is-
1. In a sewing machine, the combination with the bracket-arm having the bearing
portions provided with concave seats, of the driving shaft having ball journals
near its opposite ends, and the bearing screws having concave ends fitting the said
journals.
2. In a sewing machine, the combination with the driving shaft and fly and pulley.
wheel, of the bracket-arm having the extension within which the pulley of the said
wheel is housed, the lower part of the said extension being downwardly and inwardly
inclined to conduct the escaping oil within the said arm.
3. In a sewing machine, the combination with the pitman-lever 12, and the link 13,
of the rotating shaft 10 provided with the crank 14, the said pitman-lever and crank
having overlaping pins, 16 and 17, whereby side strain between said pitman-lever and
crank is prevented.
The combination with a rotary sewing machine shuttle having a series of recesses
or pockets at its periphery, of a rotary shuttle carrier having a series of clamping
levers adapted to engage and hold the shuttle at the said recesses or pockets, and a
stationary cam for operating said levers; whereby the shuttle is positively held and
driven without a race for it to run in.
5. The combination with a rotary sewing machine shuttle carrier provided with a
series of clamping levers and having also a guard surrounding the outer end of one
of the said levers, of a stationary cam for operating the said levers.
6. The combination with the rotary shaft 10, the shuttle carrying disk 18 having
the annular, rearwardly-extending flange 19, of the bell-crank shuttle carrying levers,
pivoted to the said flange, and the stationary grooved cam by which the said levers
are operated.
7. In a sewing machine, the combination with a lower rotating shaft and two feed
operating cams carried thereby, of a feed operating lever provided with an adjustable
fulcrum and forked to embrace one of the said cams, a feed rocker having a hori-
zontal arm, to which the said lever is jointed, and two vertical arms; and a rock-
shaft carried by the said vertical arms and having two horizontal arms one of which
is provided with a feed dog and the other of which is forked to embrace the other of
the said cams.
-
8. In a sewing machine, the combination with a lower rotating shaft and two feed
operating cams carried thereby, of a slotted feed operating lever forked to embrace one
of the said cams, a feed rocker having a horizontal arm, to which the said lever is
jointed, and two vertical arms, a rockshaft carried by the said vertical arms and having
two horizontal arms one of which is provided with a feed dog and the other of which
is forked to embrace the other of said cams, an adjustable arm having a fulcrum
block extending into the slot of the said feed operating lever, a sliding rod by which
the arm is carried, a feed regulating lever connected with said rod and an adjusting
device for the said feed regulating lever.
9. In a sewing machine, the combination with a feeding mechanism, a feed regu-
lating lever, the latter having a slot at its rear end, of a feed regulating button having
a conical or tapered body, a milled head or thumb portion, a crank-pin to work in the
slot of the said lever and a flange below the said crank-pin, and a bed-plate having a
tapered hole in which the conical portion of the said button fits.
10. In a sewing machine, the combination with the driving shaft 4 carrying the
crank-arm 53 having a hollow pin 54 provided with one or more oil holes, of the
pitman 57 having an eye surrounding the said pin, and the needle-bar with which the
said pitman is operatively connected.
11. In a sewing machine, the combination with the needle operating shaft provided
with a double crank having two differently arranged crank pins or studs, of a needle-
bar operatively connected with one of the said crank pins, and a take-up rock-shaft
having two arms one of which is operatively connected with the other of the said
crank-pins, and the other of which extends in front of the face-plate and is the take-up
proner.
"

page_text: 12. In a sewing machine, the combination with a bracket-arm and its head, of a
needle-operating shaft journalled in said arm and provided at its forward end with a
double crank having two differently arranged crank-pins, a needle-bar operatively
connected with one of the said crank-pins and having vertical bearings in the said head
and provided with a take-up arm extending in front of the face plate of the said head
and with a slotted operating arm extending within the head and being engaged by the
other of the said crank pins.
13. In a sewing machine, the combination with a bracket-arm and its head, of a
needle operating shaft journalled in said arm and provided at its forward end with a
double crank having two differently arranged crank-pins, a needle bar operatively con-
nected with one of the said crank-pins and having vertical bearings in the said head,
and a take-up rock-shaft journalled to one side of the said head and provided with a
take-up arm extending in front of the face plate of the said head and with a slotted
operating arm extending within the head and being engaged by the other of the said
crank-pins, the center of the said rock-shaft being in the same horizontal plane as the
center of the said needle-bar operating shaft.
14. In a sewing machine, the combination with a shuttle, of a shuttle driver or
carrier having two independently operated clamps by which the said shuttle is held
and driven, and means for alternately opening and closing the said clamps to permit
the loops of needle thread to pass; whereby the shuttle is positively held and driven
without requiring a race for it to run in.
15. In a sewing machine, the combination with a shuttle, of a shuttle driver or
carrier having two clamps between which the said shuttle is hield and by which it is
driven, each of the said clamps consisting of a fixed and a movable part, the movable
parts of the said clamps being adapted to operate independently of each other;
whereby the shuttle is positively held and driven without a race for it to run in.
16. The combination with a sewing machine shuttle driver or carrier having two
carrying arms or parts one of which engages the shuttle on its outer side or periphery
and the other of which engages the shuttle on its inner side, of two independently
movable clamping levers to co-operate with the said carrying arms to form two
clamps, and a stationary cam to cause the said clamping levers to engage the
shuttle.
17. The combination with a sewing machine shuttle driver or carrier having two
arms or parts to engage a shuttle, of two independently movable clamping levers
pivoted to the said driver or carrier and thus moving therewith, a stationary cam to
cause the said levers to clamp the shuttle alternately, and a spring to release said
levers from the shuttle.
18. The combination with a shuttle driver or carrier, of shuttle clamping levers
provided with eccentric studs which may be turned to take up wear, and a stationary
cam, for engaging said studs to operate said levers.
19. The combination with the shuttle provided with the recesses or pockets 80
and 81, of the shuttle carrier or driver, the independently movable clamping
levers adapted to engage the shuttle at the said recesses or pockets and the stationary
cam for operating the said levers.
20. The combination with a sewing machine stand having a vertical supporting
bar a², of a vertically movable. support for the sewing machine having a bracket
provided with guide rollers arranged on opposite sides of the said bar.
21. The combination with a sewing machine stand having a vertical supporting
bar, a², of a vertically movable support for the machine provided with a bracket
having guide rollers arranged on opposite sides of the said bar and one above the
other.
22. The combination with the guide bar a², having a groove in one side and a rib on
the other side, of the machine support having a bracket provided with two guide
rollers one of which is rounded to fit in said groove and the other of which is grooved
to embrace said rib.
23. The combination with the vertically movable platform or machine support C, of
the rotary box D, a stationary hub within said box, a volute spring also within said

page_text: box and attached to the latter and to the said hub, and a strap running on the
periphery of the said box and connected to the latter and to the said movable
support.
24. The combination with a vertically movable platform or machine support C, of a
rotary box having a circumference equal to or greater than the distance which the said
support is to be raised and lowered, a stationary hub within the said box, a voluto
spring also within the said box and attached to the latter and to the said hub, and a
strap running on the periphery of the said box and connected to the latter and with
the said movable support; whereby only a single revolution (or less) of the said box
will be required in raising and lowering the machine.
25. The combination with the vertically movable machine support Chaving the
bracket G₁ of the rotary box D having lugs & and d', a stationary hub within said box,
a volute spring also within said box and attached to the said hub and to the said lug d¹,
and the strap d attached to the said lug and to the said bracket.
26. The combination with a sewing machine table provided with an opening in its
top, of a movable support for the machine, a vertical guide for said support, and two
folding leaves, hinged together and to the table and the said support, respectively.;
whereby when the support is lifted the said leaves will be folded beneath the table out
of the way of the operator and when the support is lowered the leaves form a housing
for the machine in front.
27. The combination with the legs or side frames A and A¹ having the grooved
back-bars a, of the back panel 6 let into and held in place by the said bars.
28. In a sewing machine stand, the combination, with a treadle, of a torsion spring
serving as a support for the said treadle.
29. The combination with the legs or side frames A and A', of the torsion
spring, the loops f¹ to which the said spring is attached, the treadle hung on
the said spring and a single set screw f' for holding the said loops and spring in
place.
30. The combination with the torsion spring fand the treadle F, into which the
spring is let, of the holding plates f³ for attaching the said treadle to the said
spring.
31. The combination with the side frames or legs A and A¹, of the braced cross
bar g2, at the base of the stand provided with uprights each having two bearings, (as
lugs or projections g¹) against the said side frames; and connections, between said
bearings, to hold the said uprights and side frames together.
32. The combination with the side frames or legs A and A' of the cross bar ², at
the base of the stand, provided with the uprights g each having two projections g³, the
arched brace G, and connections, between said projections, to hold the said uprights
to the said side frames to brace the latter.
33. The combination with the side frames A and A', of the braced cross bar g² at
the base of the stand having the uprights g provided with the projections g¹,
extending into recesses in the said side frames, and the horizontal bracing
projections g*.
34. The combination with a sewing machine stand, having an enclosed belt guide
or hole as, of a driving wheel provided with an inclined cut away portion and
with a belt replacing hook ', at the end of the said cut away portion, the said hook
being within the circle or periphery of the said wheel and also within the vertical
plane thereof.
.
35. The side frame A¹ having the integral inwardly projecting arms a adapted to
serve as a dress guard, and the central hut or bearing a, combined with the driving
wheel H journalled in said hub or bearing and arranged on the outer side of said arms
and within the outer side of the said side frame.
36. The combination with the side frame A¹ having a dress guard, of a driving
wheel located outside of the said dress guard and journalled therein, said dress guard
having at its inner side a pocket to retain the waste oil from the journal of the said
wheel and keep it from soiling the dress of the operator.
37. The combination with the driving wheel and the dress guard having a hub in

page_text: which the said wheel is journalled, of the washer let into the said hub to form an
oil pocket.
38. In a sewing machine stand, the combination with the driving wheel H, of the
pitinan having a right angular end portion, provided with a ball socketed in the
Said wheel, a hollow screw to retain the ball in its socket and a set nut for the said
Screw.
39. In a sewing machine stand, the combination with the driving wheel H and the
treadle F, having sockets, of the pitman Fhaving right angular end portions
provided with balls fitting in said sockets, hollow screws (through which the said end
portions of the pitman pass) to retain the said balls in said sockets, and set nuts for
the said screws.
40. The combination with a leg or side frame of a sewing machine table, of a
drawer-supporting shelf attached to said leg or side frame and provided on opposite
sides with longitudinal guiding ribs for the drawers.
41. The combination with the leg or side frame of a sewing machine table, having
perforated ears, as aº, of a drawer-supporting shelf attached to the said cars and having
a longitudinal guiding rib on, its upper side and two under cut guiding ribs on its
under side, and two drawers, one of which has a longitudinal guiding groove in its
bottom and the other of which has at its upper side two longitudinal overhanging lips
to engage said under-cut ribs.
42. A sewing machine stand provided at one end with a cupboard L having a
swinging door M provided at its top with a receptacle m.
43. The combination with the plate a³ having the notched hole at, of the pawl e
having a pivot-pin provided with the lug e² to retain the pawl in place when the said
lug is out of register with the notch of the said hole.
Dated this 7th day of January 1888.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.