Year: 1888

page_text: Date of Application, 4th Feb., 1888
Complete Specification Left, 16th Oct., 1888
Complete Specification Accepted, 16th Nov., 1888
1, HENRY COOPER PRETTY, of Florence Villa, St. Saviour's Road, Leicester,
Engineer do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in the construction of needles for use in sewing
machines and for other purposes and consists in forming on the plain or short groove
side, known as the shuttle or hook side of the needle, a flattened surface containing a
groove of varying depth and width commencing immediately above the eye, and
extending a suitable distance up the flat side of the needle.
The first part of the groove on the flattened surface of the needle may be formed
deeper than the other portions of the groove and extend preferably about one eighth
of an inch up the side gradually becoming narrower and shallower and forming a
shallow groove about three sixteenths of an inch more or less above the eye of the
needle. The sides or edges of the shallow groove are raised a little higher than
"swell" at such part.
those of the groove on either side and form a kind of
The groove above the "swell" or shallow groove may extend a suitable distance
up the flat side or the needle and he of uniform depth, and width or otherwise
as desired.
It will thus be seen that three distinct and different grooves are combined in one
viz. (1) the short deep groove (2) the narrow shallow groove with raised edges forming
a "swell" and (3) the long groove of uniform depth and width or otherwise as desired.
may however if desirable omit the narrow shallow groove and leave the flattened
surface to divide the two remaining grooves.

page_text: 1, HENRY COOPER PRETTY of Florence Villa, St. Saviour's Road, Leicester,
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 to improvements in the construction of needles for use in
sewing machines and for other purposes and consists in forming on the plain or short
groove side, known as the shuttle or hook side of the needle, a flattened surface con-
taining a groove of varying depth and width commencing immediately above the eye
and extending a suitable distance up the flat side of the needle.
The first part of the groove on the flattened surface of the needle may be formed
deeper than the other portions of the groove, and gradually become narrower and
shallower and form a shallow groove about " more or less above the eye of
the needle.
The sides or edges of the shallow groove are raised a little higher than those of the
groove on either side and form a kind of swell' at such part.
The groove above the swell or shallow groove may extend a suitable distance
up the flat side of the needle and be of uniform depth and width or otherwise as
desired.
It will thus be seen that three distinct and different grooves are combined in
one, viz, (1) the short deep groove (2) the narrow, shallow groove with raised edges
forming a swell' & (3) the long groove of graduated depth and width or otherwise
as desired.
In the accompanying drawings
Figure 1 is a view of a needle constructed according to my invention and shewing
the combined groove side.
Figure 2 is a similar view shewing the opposite or long groove side.
Figure 3 is a sectional view to indicate more clearly the depths of the respective
grooves.
Figure 4 is a similar view to Figure 1, but shewing a needle provided with a
differently shaped point.
The views shown are on an enlarged scale and like letters of reference indicate
corresponding parts in each of the figures.
A is the shank and B is the eye of the needle C is the short deep groove just above
the eye of the needle, extending preferably about "up the side and gradually
becoming shallower and forming a second groove D which constitutes a kind of swell
or 'rise; continuing from this shallow groove D is a groove E longer and deeper
than the latter and becoming less deep the higher up the needle it extends until i
graduates off into a flat surface F.
On the opposite side of the needle is a groove G extending up the side and increasing
in depth towards the upper end-where-a thicker body-of-metal exists and graduating of
into the chank

page_text: Figures 1 and 2 shew a needle constructed with a triangular or bayonet shaped
point, Figures 3 and 4 illustrating the ordinary flat or leather point.
The chief advantages of the combined groove or grooves C. D. E. of varying depth,
are as follows:-
The short deep groove C is sufficiently deep to enable the thread to be received into
it, thereby allowing it a greater freedom and minimizing the friction on it during
the time it is passing through the material.
The shallow groove D formed by the 'swell' or 'rise' acts as a loop maker at the
rising of the needle and the long groove E is adapted for receiving the thread and
for relieving the friction on the latter while passing through the material to its further-
most part.
The flat portion F conjointly with the combined groove retains the thread in position
while the loop is being formed.
I do not confine myself strictly to the depths or proportions of the grooves as
indicated in the accompanying drawings, as these may be varied as circumstances
require, and when desirable the shallow groove may be omitted and a full body of
metal flush with the flattened surface allowed to divide the two remaining grooves.
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:
I. A sewing machine or other needle having a groove such as C. D. E of
varying depth substantially as described and illustrated in the accompanying
drawings.
II. In a sewing machine or other needle the combination with a groove such as
C. D. E of varying depth, of a flat surface such as F substantially as herein described
and illustrated in the accompanying drawings.
III. In a sewing machine or other needle the combination with a groove such as
C. D. E of varying depth, of a groove such as G substantially as herein described and
illustrated in the accompanying drawings.