IMPROVEMENT OF HEMSTITCHINO OR ZIGZAG SEWING MACHINES
Year: 1885

page_text: WILLIAM PENNINGTON 2ª Great Victoria St. Belfast Sewing Machine Agent, do.
hereby declare the nature of my invention for the IMPROVEMENT OF HEMSTITCHINO
OR ZIGZAG SEWING MACHINES to be as follows:-
This invention relates chiefly to a Sewing Machine formed by the junction or
combination of the main features of the Wheeler & Wilson and the, McGlashen or
Holroyd Hemstitching Machines. The result being the attainment of a higher
speed and greater durability. This invention however is applicable to other Zigzag
Sewing Machines.
In carrying out this combination, two bevilled wheels are employed' of the usual
proportions, instead of the ordinary wheels used for revolving the stitch cams on
the Hemstitching Machines.
Fig. 1, represents the under side of Sewing Machine-The rotating hook shaft b
is provided with two adjustable collars B, B, fixed by screws near,to,the end of the
shaft; between these collars is sleeved a tricollar C, C, having three holes--inmthe
centre one of which the rotating hook shaft b, freely revolves, while in the holes.to
the right and left of the hook shaft b, the bobbin ring sliding bars D,,D., are firmly
held by screws-To each end of the tricollar C C, is pivotted the fork H, H, which
being screwed at the rear end H¹, to the shoe or shifter arm, extending from the
upper side of the machine, communicates (by the motion of the hem-cam) a lateral
or zigzag movement to both the hook (a) and the bobbin ring A, at the same
time The end of the rotating hook shaft F, is tongued and made to play back-
wards and forwards into a groove of the corresponding shaft G, coming from the
variable notion (Wheeler and Wilson system) d, e, f, and working in the bearing, J.
The bobbin ring A, being hinged to the sliding bar D, and clutched by a spring
at the front end of the sliding bar D', follows the lateral movement of the rotating
hook a, thus holding the bobbin always in the same position in the cavity of 'the
rotating hook.
I claim as the specially novel features of this invention the combination of the
main principles of the Wheeler and Wilson Sewing Machines and those of the
M'Glashen or Holroyd hemstitching Machines but more especially the adaptation
of the rotating hook to the purposes of hemstitching and other kinds of zigzag
sewing.
Dated this 21st day of December 1885-
WILLIAM PENNINGTON,
24, Great Victoria Street, Belfast,

page_text: Improvement of Hemstitching or Zigzag Sewing Machines.
WILLIAM PENNINGTON 2ª Gt. Victoria St Belfast Sewing Machine Agent
I, W Pennington do hereby declare the nature of my invention for HEM-
STITCHING OR ZIGZAG SEWING and in what manner the saine is to be performed,-
to be particularly described and ascertained in and by the following statement:-
This Invention relates chiefly to a Hemstitching Machine formed by the junction
or combination of the main features of the No 8 Wheeler & Wilson Sewing
Machine and the McGlashan style of hemstitching Machines in a modified form the
result being a higher speed and greater durability.
This Invention however is applicable to other Zigzag Sewing M/ce.
In carrying out this combination wheels of the usual proportions for hemstitching
are employed to revolve the stitch and hem-cams and are geared to the driving
shaft of the machine-also the following arrangement or apparatus (as per drawings)
for conjointly effecting the lateral or zigzag movement of the rotating hook, and
needle bar at the same time. The drawings herein referred to are those filed with
my provisional specification.
Fig. I, represents the under side of sewing machine. The rotating hook shaft b
is provided with two adjustable collars B, B, fixed by screws to the hook shaft,
between these collars is sleeved a tricollar C or cross bar c, c, having three holes ;
in the centre one of which, the rotating hook shaft freely revolves, while in the
holes to the right and left of hook shaft b, the bobbin-ring-sliding-bars D, D', are
firmly held by screws.
To each end of the tricollar C, C, is pivotted the hook pullers or fork H, H, which
being screwed at the rear end H³, to the shoe or needle-bar shifter arm, extending
from the upper side of the machine, communicates by the motion of the hem-cam a
lateral or zigzag movement to both the rotating hook a, and the bobbin ring A, at
the same time. The end of the rotating hook shaft F, is tongued and made to play
backwards and forwards into a groove G, of the corresponding shaft coming from
the variable motion d, e, f (Wheeler & Wilson System) and working in the
bearing J. This to & fro motion may however be obtained by various methods of
construction for the play of the hook shaft, such as the use of two discs with holes
& studs, &c.
The bobbin ring A, being hinged to the sliding bar D, and clutched by a spring
at the front end of the sliding bar D¹, follows the lateral movement of the rotating
hook, a, thus holding the bobbin always in the same position in the cavity of the
hook.

page_text: 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:
1st The combination of the main or leading features of the Wheeler and Wilson
Sewing Machines with those of the McGlashan style of hemstitching machines for
the purpose of hemstitching.
2nd The conjoint movement of the rotating hook with the needle bar.
3rd The adaptation of the rotating hook by the means or apparatus as des-
cribed in the foregoing, and illustrated by the drawings sent with my provisional
specification for the purposes of Hemstitching or zigzig sewing.