Year: 1887

page_text: Date of Application, 25th Nov., 1887
Complete Specification Left, 25th Aug., 1888
Complete Specification Accepted, 26th Oct., 1888
1, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention has for its object to improve and simplify the construction of that
class of sewing machine employing a rotary hook and eye-pointed needle.
Prior to my invention, sewing machines have been made employing a rotating hook
fast upon a short shaft driven by power, the said shaft through a link actuating a
vibrating arm the forward end of which was provided with a curved needle, and so
also prior to my invention a hook connected to a short hook shaft has been rotated
through a variable motion device from a rotating shaft located below the bed-plate
and this latter shaft has been joined by links or connecting rods to a needle bar
actuating shaft to, in one case, rock, and, in the other, rotate the needle bar actuating
shaft.
The first form of machine referred to employing a curved needle is objectionable
for some classes of work, and in the second form of machine the introduction of a
variable motion device between the two shafts referred to adds to the expense of the
machine and to the power required to run it.
In order to simplify the construction of machines having a rotating hook, and to
cheapen the same to the lowest practical point, the usual variable motion device,
composed of a link to connect the discs at the ends of the two shafts below the bed-
plate, may be dispensed with, and the rotating hook may be applied directly to the
end of a long shaft supported in bearings below the bed-plate, and the said shaft may
be rotated from a rotating needle bar actuating shaft in the overhanging arm, through
the intervention of a sliding and rocking lever provided with a roller or other stud
which enters a groove in an arm attached to the shaft to which the said hook iş

page_text: secured, the said hook preferably having co-operating with it a loop positioning plate
or device, as will be described, so that while the machine is being run the liability of
skipping stitches is obviated.
This invention consists essentially in a sewing machine containing the following
instrumentalities, viz. a straight eye pointed needle; a needle bar to which it is
attached a rotating need bar actuating shaft provided with a crank and located in
the overhanging arm of the machine; connecting devices between the said shaft and
needle bar a rotating hook; a long shaft to which the said hook is attached; the
said shaft being provided at its opposite end with a grooved arm; a sliding and
rocking lever provided with a roller or other stud and connected with the crank on
the needle bar actuating shaft, the said roller or other stud entering the groove in the
arm referred to a take-up located at the front of the over-hanging arm of the
machine;
and a cam carried by the rotating needle bar actuating shaft to operate
the said take-up.
Also, in a sewing machine of the class referred to, a straight eye pointed needle, a
needle-bar to which it is attached; a rotating needle bar actuating shaft located in
the over-hanging arm; connecting devices between the said shaft and needle-bar; a
rotating hook; a long shaft below the bed-plate and to which the said hook is
attached, the said shaft being provided at its opposite end with a grooved arm a
sliding and rocking link or lever provided with a roller or other stud and connected
to the crank of the needle bar actuating shaft, the roller or other stud carried by the
said lever entering the groove in the said arm; a loop positioning device to act
upon the loop of needle thread between the take up lever and the eye of the needle ;
a take-up located at the front of the overhanging arm of the machine; a cam
carried by the rotating needle bar actuating shaft to operate the said take-up:
and a thread tension device and spring to act upon the needle thread as will be
described.
In carrying this invention into practice a bed-plate, upright, and overhanging arm,
are provided of usual shape.
The overhanging arm has bearings for the rotating shaft employed to reciprocate
the needle bar by or through a link.
The shaft has a crank embraced by the upper end of a lever slotted longitudinally
to embrace a squared or rectangular block loose on a stud mounted in the upright
parallel to the shaft.
The lower end of the lever has a stud provided with a loose follower block or roll,
which enters a groove cut in a short arm fast to the rear end of a
rotating shaft
working in suitable bearings, the forward end of the said shaft having secured to it a
rotating hook pointed to enter the loop of needle thread, the said shaft having secured
to it at the rear side of the hook a loop positioning device or plate having a lip which
acts upon the loop of needle thread projecting from the eye of the needle at the long
groove side, and besides aiding in forming and throwing out the loop for the point of
the hook to enter it, also by moving in contact with that part of the loop bears it
forward toward the operator thus preventing that part of the loop between the eye of
the needle and the seam from twisting or curling forward toward the operator and
away from the point of the hook into such position that the point of the hook cannot
enter it.
The loop positioning device thus prevents the skipping of stitches which without
such device is liable to occur with hard twisted thread.
The hook hereinbefore mentioned has co-operating with it a loop guard; the said
loop guard is attached to the framework by a screw having its acting face made
concave so as to almost touch the periphery of the hook and prevent the loop of
needle thread as it is cast off from the hook from flying up and getting in the way
of the feed-bar and of the needle guiding projection which is extended down from the
needle throat plate through a slot in the said feed-bar.
23
This loop guard does not act as a loop detainer to simply hold the old loop while
the point of the hook acts to take a new loop as in the ordinary "Wheeler & Wilson
machine using a loop check.

page_text: The upright portion of the ring slide is held in position to keep the bobbin in place
by a spring catch.
The feed bar having usual feed points at its end next the operator, is provided with
a feed bar adjusting plate attached thereto by screws.
The plate and the feed bar are so shaped as to receive between them the outer end
of the stitch regulating bar provided with a screw and made adjustable longitudinally
so as to place its cam projection or bend in such position as to form a shifting fulcrum
for the link pivoted to the frame, the said link being jointed to a cross bar having a
downturned end, on which is pivoted a block which is acted upon by a cam on the
shaft, the said cam by its action on the block moving the cross bar and its attached
link a greater or less distance according to the position of the bar, thus providing for
a stitch of greater or less length.
The downward and backward movement of the feed bar against the cam of the
shaft and the contact of the block with the cam is effected and insured by a
spring.
In this class of machine using a rotating hook which does not pass through the
loop of needle thread but which simply catches the loop of needle thread and
draws it down, spreads it, and casts it over a bobbin, it is essential that the lower
shaft be rotated from the upper shaft by a contrivance capable of imparting to the
said shaft a variable motion, the said shaft as the point of the hook rises above the
centre of the shaft commencing to move faster, it reaching its fastest speed
immediately after the point of the hook enters the loop of needle thread, it continuing
to move at its fastest speed until the loop of needle thread is cast off.
The take-up has an inwardly extended arm provided with a roller or other stud
which enters a cam groove in a cam hub which is fast on the needle bar actuating
shaft the said cam being of such shape as to permit the needle thread to be
given up to the hook, and to take up the loop of needle thread cast off from the said
hook.
The front plate, which covers the needle and presser bars has screwed into it a
stud..
This stud has a shoulder which is surrounded by a spiral spring one end of
which enters a groove in the shoulder. The spiral spring beyond the hub is bent
outwardly across the two tension plates and its end is bent around the stud in front of
one of the tension plates.
The rotation of the tension-plates is prevented by a pin. The stud outside the discs
has applied to it a stop shield which bears against the outwardly flanged rim of one of
the tension plates hereinbefore referred to.
A spring acted upon by a nut rests against the shield. The first of the herein-
before mentioned plates has a projection which extends. through a slot, and the second
herein before mentioned plate has a projection that extends over the first hereinbefor
mentioned plate. The projections serve as stops for the thread and prevent it from
escaping laterally from the plates. The shield has a part of its periphery cut away to
form a slot in which the tension spring may move, it aiding in taking up the slack in
the thread and giving it up to the stitch at the proper time. A screw is employed to
confine the serrated surface of the feed to the feed-bar.
Dated this 25th day of November 1887.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co. Patents Agents,
Southampton Buildings, in the County of Middlesex, 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 :-
This invention has for its object to improve and simplify the construction of that
class of sewing machine employing a rotary hook and eye-pointed needle.
Prior to this invention sewing machines have been made employing a rotating hook
fast upon a short shaft driven by power, the said shaft through a link actuating a
vibrating arm the forward end of which was provided with a curved needle, and so
also prior to this invention a hook connected to a short hook shaft has been rotated
through a variable motion device from a rotating shaft located below the bed-plate and
this latter shaft has been joined by links or connecting rods to a needle bar actuating
shaft to, in one case, rock, and, in the other, rotate the needle bar actuating shaft.
The first form of machine referred to employing a curved needle is objectionable
for some classes of work, and in the second form of machine the introduction of a
variable motion device between the two shafts referred to adds to the expense of
the machine and to the power required to run it.
In order to simplify the construction of machines having a rotating hook, and to
cheapen the same, the usual variable motion device, composed of a link to connect the
discs at the ends of the two shafts below the bed-plate may be dispensed with and the
rotating hook may be applied directly to the end of a long shaft supported in bearings
below the bed-plate, and the said shaft may be rotated from a rotating needle bar
actuating shaft in the overhanging arm through the intervention of a sliding and
rocking lever provided with a roller or other stud which enters a groove in an arm
attached to the shaft to which the said hook is secured the said hook preferably having
co-operating with it a loop positioning plate or device, as will be described, so that
while the machine is being run the liability of skipping stitches is obviated.
This invention consists essentially in a sewing machine containing the following
instrumentalities, is a straight eye pointed needle; a needle bar to which it is
attached a rotating needle bar actuating shaft provided with a crank and located in
the overhanging arm of the machine; connecting devices between the said shaft and
needle bar a rotating hook; a long shaft to which the said hook is attached, the
said shaft being provided at its opposite end with a grooved arm; a sliding and
rocking lever provided with a roller or other stud and connected with the crank on
the needle bar actuating shaft, the said roller or other stud entering the groove in the
arm referred to; a take-up located at the front of the over-hanging arm of the
machine; and a cam carried by the rotating needle bar actuating shaft to operate
the said take-up.
Also, in a sewing machine of the class referred to, a straight eye pointed needle,
a needle-bar to which it is attached; a rotating needle bar actuating shaft located in

page_text: e overhanging arm; connecting devices between the said shaft and needle-bar;
rotating hook a long shaft below the bed-plate and to which tho said hook is
tached, the said shaft being provided at its opposite end with a grooved arm; a
iding and rocking link or lever provided with a roller or other stud and connected to
e crank of the needle bar actuating shaft, the roller or other stud carried by the said
ver entering the groove in the said arm; a loop positioning device to act upon the
op of needle thread between the take up lever and the eye of the needle; a take-up
cated at the front of the overhanging arm of the machine; a cam carried by the
otating needle bar actuating shaft to operate the said take-up; and a thread tension
evice and spring to act upon the needle thread as hereinafter described.
In the accompanying drawings
ה
hadwing in invention

page_text: This loop guard does not act as a loop detainer to simply hold the old loop while
the point of the hook acts to take a new loop as in the ordinary "Wheeler & Wilson"
machine using a loop check.
The upright portion of the ring slide is held in position to keep the bobbin h¹ in
place by a spring catch ha.
g
The feed bar y having usual feed points at its end next the operator, is provided
with a feed bar adjusting plate m' attached thereto by screws m²,
m².
The plate m and the feed bar are so shaped as to receive between them the outer
end of the stitch regulating bar m³ provided with a screw m¹ and made adjustable
longitudinally so as to place its cam projection or bend, as shown by dotted lines
Figure 5, in such position as to form a shifting fulcrum for the link m³ pivoted at m
to the frame, the said link being jointed to a cross bar m having a downturned end,
see Figure 6, on which is pivoted at m³ a block m which is acted upon by a cam m10
on the shaft D, the said cam by its action on the block moving the cross bar and its
attached link a greater or less distance according to the position of the bar m³, thus
providing for a stitch of greater or less length.
The downward and backward movement of the feed bar against the cam n of the
shaft D, and the contact of the block m³ with the cam m is effected and insured by
the spring.
In this class of machine using a rotating hook which does not pass through the
loop of needle thread but which simply catches the loop of needle thread and draws
it down, spreads it, and casts it over a bobbin, it is essential that the lower shaft D
be rotated from the upper shaft A³ by a contrivance capable of imparting to the said
shaft D a variable motion, the said shaft D as the point of the hook rises above the
centre of the shaft commencing to move faster, it reaching its fastest speed
immediately after the point of the hook enters the loop of needle thread, it con-
tinuing to move at its fastest speed until the loop of needle thread is cast off.
The take-up o pivoted at o' has an inwardly extended arın provided with a roller or
other stud o which enters a cam groove o³ in a cam hub of which is fast on the needle
bar actuating shaft A³, the said cam being of such shape as to permit the needle thread
to be given up to the hook, and to take up the loop of needle thread cast off from
the said hook.
The front plate, see Figure 8, which covers the needle and presser bars has screwed
into it, see Figures 9 and 10, on a larger scale, a stud t.
This stud has a shoulder which is surrounded by a spiral spring pl one end of
which enters a groove t20 in the shoulder. The spiral spring p¹ beyond the hub is
bent outwardly across the two tension plates 2, 3, see Figure 10, and its end is bent
around the stud t in front of the tension plate (3.
The rotation of the tension plates is prevented by a pin as t. The stud t outside of
the discs 2, 3, has applied to it a stop shield which bears against the outwardly
flanged rim of the plate t³.
A spring acted upon by a nut rests against the shield . The plate t², see
Figure 11, has a projection 20 which extends through the slots, and the plate ³ has
a projection 21 that extends over the plate 2. The projections 20 and 21, serve as
stops for the thread and prevent it from escaping laterally from the plates. The
shield has a part of its periphery cut away as shown at to form a slot in which
the tension spring p¹ may move, it aiding in taking up the slack in the thread and
giving it up to the stitch at the proper time. The screw m Figure 7, is employed
to confine the serrated surface of the feed to the feed-bar.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent I declare that what I claim is
First. The herein described sewing machine containing the following instrumen-
talities, viz. the straight eye pointed needle; the needle bar to which it is attached :
the rotating needle bar actuating shaft A³ provided with the crank A* and located in
the over-hanging arm of the machine; the connecting devices between the said shaft

page_text: and needle bar the rotating hook D the long shaft D to which the said hook is
attached, the said shaft being provided at its opposite end with the grooved arm a¹:
the sliding and rocking lever C provided with a roller or other stud a and connected
with the crank A on the needle bar actuating shaft, the said roller or other stud
entering the groove in the arm a referred to a take-up o located at the front of the
overhanging arm of the machine; and the cam o' carried by the said rotating needle
bar actuating shaft to operate the said take-up, substantially as described..
Second. In a sewing machine of the class referred to, the straight eye pointed
needle, the needle bar to which it is attached; the rotating needle bar actuating
shaft A located in the overhanging arm connecting devices between the said shaft
and needle bar; the rotating hook D' the long shaft D below the bed-plate and to
which the said hook is attached, the said shaft being provided at its opposite end with
a grooved arm a¹; a sliding and rocking link or lever C provided with a roller or
other stud a and connected to the crank A of the needle bar actuating shaft A, the
roller or other stud carried by the said lever entering the groove in the said arm; the
loop positioning device to act upon the loop of needle thread between the take-up
lever and the eye of the needle the take-up located at the front of the overhanging
arm of the machine; the cam of carried by the rotating needle bar actuating shaft to
operate the said take-up and a thread tension device and spring to act upon the
needle thread substantially as described.
:
Date this 25th day of August 1888
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.