IMPROVEMENTS IN SEWING MACHINES
Year: 1884

page_text: I, WALTER BEECROFT, of Swinegate, Leeds, in the County of York, Mechanical
Engineer do hereby declare the nature of said Invention for "IMPROVEMENTS IN
SEWING MACHINES," to be as follows:-
The object of my improvements is to obtain a more convenient working of the
machine by having the principal movements of the machine imparted by means
rotating shafts instead of rocking shafts or orms, also I obtain a higher speed
for the top feed than is usual in sewing machines as at present constructed.
I employ two rotating shafts, one for actuating the needle, the other for
actuating the hook or shuttle.
By preference I make the rotating needle shaft the driving shaft and impart
motion therefrom to the rotating hook or shuttle shaft, through an intermediate
crank shaft actuated by two eccentrics or cranks and connecting rods.
In order to obtain the irregular movement required for the hook or shuttle shaft
I employ a crank at the end thereof to which motion is imparted from the
intermediate shaft by means of a stud crank and connecting link.
The feeding mechanism is known as the top feed. The "lift" of the foot or
feed bar is obtained by means of a rocking shaft in suitable bearings having two
projecting arms thereon. One arm is provided with a pivotted segment at its
outer end through which motion is transmitted to the "lift" rocking shaft from
the needle or driving shaft by means of a cam or eccentric. The other arm is
connected to the presser-foot or feed bar.
16
To make the feed motion more complete I employ an auxiliary presser
actuated alternately with the presser-foot or feed-bar from an eccentric or cam on
the needle or driving shaft.
The feed movement is given to the presser-foot or feed-bar by a vertical rocking
shaft actuated by a cam on the needle or driving shaft, the movement for regulating
the feed or stitch being obtained owing to one of the arms transmitting motion to
the vertical rocking shaft being made loose on the shaft and capable of adjustment
by means of set screws from a fixed intermediate projecting arm.
The motion for feeding the foot is conveyed from the rocking shaft by a projecting
arm at the lower end thereof.
For keeping the spool or case in position and so that the spool or case can be
readily and conveniently released when required, I provide a small lever pivotted
on a stud on end thereof, forming a sliding door or cap for covering and retaining
the spool and case in position; the lever itself being retained in position by a
spring and stud. By moving the lever downwards or to one side the spool and
case are uncovered and released and can be removed.

page_text: COMPLETE SPECIFICATION.
I WALTER BEECROFT of Swinegate Leeds in the County of York, Mechanical
Engineer do hereby declare the nature of said Invention for "IMPROVEMENTS IN
SEWING MACHINES" and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
The object of my improvements is to obtain a more convenient working of the
machine, by having the principal movements of the machine imparted by means
of rotating shafts instead of rocking shafts or arins, also I obtain a higher speed
for the top feed than is usual in sewing machines as at present constructed.
I employ two rotating shafts, one for actuating the needle, the other for actuating
the hook or shuttle.
By preference I make the rotating needle shaft the driving shaft and impart
motion therefrom to the rotating hook or shuttle shaft, through an intermediate
crank shaft actuated by two eccentrics or cranks and connecting rods. In order to
obtain the irregular movement required for the hook or shuttlo shaft I employ a
crank at the end thereof to which motion is imparted from the intermediate
shaft by means of a stud crank and connecting link.
The feeding mechanism is known as the top feed. Tho "lift" of the foot or feed
bar is obtained by means of a rocking shaft in suitable bearings having two
projecting arms thereon. One arm is provided with a pivotted segment at its outer
end through which motion is transmitted to the "lift" rocking shaft from the
needle or driving shaft by means of a cam or eccentric. The other arm is connected
to the presser foot or feed bar. To make the feed motion more compléte I employ
an auxiliary "presser" actuated alternately with the presser foot or feed bar from
an eccentric or cam on the needle or driving shaft.
The feed movement is given to the presser-foot or feed bar by a vertical rocking
shaft actuated by a cam on the needle or driving shaft, the movement for regulating
the feed or stitch being obtained owing to one of the arms transmitting motion to
the vertical rocking shaft being made loose on the shaft and capable of adjustinent
by means of set screws from a fixed intermediate projecting arm.
The motion for feeding the foot is conveyed from the rocking shaft by a projecting
arm at the end thereof.
For keeping the spool and case in position and so that the spool and case can be
readily and conveniently released when required, I provide a small lever pivotted
on a stud on end thereof, forming a sliding door or cap for covering and retaining
the spool and case in position; the lever itself being retained in position by a
spring and stud. By moving the lever downwards the spool and case are uncovered
and released and can be removed.
And in order that my invention may be more completely understood reference
is given to the accompanying drawings and to the letters and marks thereon.
DESCRIPTION OF DRAWINGS.
Fig 1 is an end clevation. Fig 2 a longitudinal section through A. B. Fig 1. and
Fig 3 is a detail view shewing arrangement for lifting the presser foot.
The sewing machine head is shewn at a and mounted on an ordinary bed plate b.
I employ two rotating shafts c and d the former for actunting the needle e and the
latter for actuating the hook or shuttle f.
By preference I inaké the rotating needle shaft c the driving shaft and impart
motion therefromn to the rotating hook or shuttle shaft d through an intermediato

page_text: crank shaft g actuated through eccentrics or cranks hh and ii and connecting
rods jj.
The
In order to obtain the irregular movement required for the hook or shuttle
shaft d I employ a crank k at the end thereof to which motion is imparted from
the intermediate shaft g by means of a stud crank and connecting link m.
feeding mechanism is known as the top feed. The "lift" of the foot or feed bar n
is obtained by means of a rocking shaft o in suitable bearings p having two
projecting arms q and r thereon, q being provided with a pivotted segment s at its
outer end through which motion is transmitted to the lift rocking shaft o from the
needle or driving shaft c by means of a cam or eccentric t. The second arm r is
connected to the presser foot bar n by a stud or bolt u.
To make the feed more complete I employ an auxiliary presser actuated
alternately with the presser foot or feed barn from an eccentric won driving
shaft c through a lever z on rocking shaft o. The feed movement is given to the
presser foot or feed bar n by a vertical rocking shaft y actuated by a cam z on the
needle or driving shaft c through levers a¹ and b; the movement for regulating
the feed or stitch being obtained by one of the levers or arms a¹ for transmitting
motion to the vertical rocking shaft y being loose on the shaft and capable of
adjustment by means of a set screw c¹ connecting it with the other or fixed
arm b¹.
The motion for feeding the foot is conveyed from the vertical rocking shaft y
by means of a projecting arm d' at the lower end thereof.
For keeping the spool and case f in position and so that it can be readily and
conveniently released when required I provide a small lever f' pivotted or mounted
on a stud g; the lever f' is retained in position in front of the spool and case f
by a spring h. By moving the lever f¹ downwards the spool or case or shuttle f
is uncovered and released and can be removed.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that
what I claim is
The arrangement and combination of the needle shaft c, eccentrics h h and i i
connecting rods jj and intermediate crank shaft g for transmitting motion to the
hook or shuttle shaft & substantially as herein set forth.
The combined application of needle shaft c eccentrics h h and ii connecting
rods and intermediate shaft g, crank k on shuttle shaft d stud crank Z on
intermediate shaft g connecting link m for imparting an irregular movement to the
hook or shuttle shaft substantially as herein set forth.
The combined application of rocking shaft o projecting arins q and r pivotted
segment 8 and cam or eccentric t for imparting the required lift of the presser foot
or feed barn substantially as herein set forth.
The employment of auxiliary presser actuated substantially as herein set
forth.
The combined application of vertical rocking shaft y, cam 2, levers a¹ and b₁
projecting arm d' and adjusting screw c' for imparting and regulating the feed of
the presser foot or feed bar n substantially as herein set forth.
The arrangement and application of lever f' on stud g¹ and its spring h¹ for
keeping the spool and case or shuttle fin position and so that it can be readily
released when required substantially as herein set forth.
J. W. HARDING,
Agent.