Improvements in or relating to Needle Bars of Sewing Machines.
Year: 1891

page_text: Date of Application, 19th May, 1891
Complete Specification Left, 17th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in or relating to Needle Bars of Sewing Machines.
I, ALEXANDER ANDERSON, Manager of the Singer Manufacturing Company's
Works, Kilbowie, Dumbartonshire, do hereby declare the nature of this invention,
(as communicated to me from abroad by the Singer Manufacturing Company, of
New York, in the United States of America, Sewing Machine Manufacturers), to
be as follows:-
This invention has for its object to provide a simple device to serve the double
function of a thread guide at the lower end of the needle bar of a sewing machive
and also as a gib to bear on the needle when the latter is secured in its bar by the
clamping collar, thereby permitting the needle to be clamped in place at the centre
of the bar without cutting away the lower end of the latter so much as would
otherwise be necessary.
To this end the thread guide, which is merely a bent wire loop to form a guiding
eye, is formed with a shank of proper size to loosely fit in the needle-receiving
groove at the lower end of the needle bar, said shank thus serving as a gib to hold
the needle in place when the clamping collar is tightened by its set screw.
The needle bar is provided as usual with a groove for receiving the shank of the
needle and a needle clamping collar provided with a set screw, the inner end of the
said screw entering a recess, formed in the needle-bar for its reception. The thread
guide has a shank of proper size to fit loosely in the groove of the needle bar in
which is placed the shank of the needle, said shank being interposed between the
shank of the needle and the collar to serve as a gib and thus cause the needle to be-
clamped tightly in place when the set screw on the collar is tightened.
By thus employing the shank of the thread guide as a gib for clamping the needle
I avoid cutting away the lower end of the needle bar so much as would otherwise
be required to enable the collar to engage and clamp a needle located in a recess in
the centre of the needle-bar at which point it is desirable to place the needle.
To prevent the thread guide from dropping out of the needle bar when the set
screw is loosened, to release the needle, I prefer to provide the upper end of the
shank of said guide with an inturned end or projection, which enters a slight recess.
formed for its reception in the needle-bar.
Dated this Eighteenth day of May 1891
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in or relating to Needle Bars of Sewing Machines.
I, ALEXANDER ANDERSON Manager of the Singer Manufacturing Company's.
Works, Kilbowie, Dumbartonshire, do hereby declare the nature of this invention
and in what manner the same is to be performed (as communicated to me) to be-
particularly described and ascertained in and by the following statement :-
This invention has for its object to provide a simple device to serve the double
function of a thread guide at the lower end of the needle bar of a sewing machine
and also as a gib to bear on the needle when the latter is secured in its bar by the
clamping collar, thereby permitting the needle to be clamped in place at the centre
of the bar without cutting away the lower end of the latter so much as would other-.
wise be necessary.

page_text: To this end the thread guide, which is merely a bent wire loop to form a guiding
eye, is formed with a shank of proper size to loosely fit in the needle-receiving
groove at the lower end of the needle bar, said shank thus serving as a gib to hold
the needle in place when the clamping collar is tightened by its set screw.
In the accompanying drawings
Fig. 1 is an elevation of the lower end of a sewing machine needle bar with the
invention applied thereto.
Fig. 2 is a similar view partly in vertical section, and
Fig. 3 is a detail perspective view of the thread guide and gib.
The needle-bar A is provided as usual with a groove a for receiving the shank 61
of the needle, and e is the needle clamping collar provided with a set screw d, the
inner end of the said screw entering a recess at e formed in the needle-bar for its
reception. F is the thread guide having a shank of proper size to fit loosely in
the groove a of the needle bar in which is placed the shank of the needle, said
shank being interposed between the shank of the needle and the collar e, as clearly
shewn in Fig. 2, to serve as a gib and thus cause the needle to be clamped tightly
in place when the set screw d is tightened.
By thus employing the shank of the thread guide as a gib for clamping the needle
I avoid cutting away the lower end of the needle bar so much as would otherwise be
required to enable the collar c to engage and clamp a needle located in a recess in
the centre of the needle-bar at which point it is desirable to place the needle.
To prevent the thread guide from dropping out of the needle bar when the set
screw is loosened, to release the needle, I prefer to provide the upper end of the
shank of said guide with an inturned end or projection g which enters a slight recess
at formed for its reception in the needle bar.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed (as communicated to me) I
declare that what I claim is :
1. The combination with a sewing machine needle bar provided with a needle-
receiving groove and a clamping collar, of a thread guide having a shank loosely
fitting in said groove and interposed between the shauk of the needle and the said
collar, substantially as set forth.
2. The combination with a sewing machine needle bar provided with a needle-
receiving groove a and a recess of the clamping collar c, its set screw d and the
thread guide having a shank interposed between said collar and the shank of the
needle and provided with the inturned end or projection to enter said recess
substantially as set forth.
Dated this Sixteenth day of February 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.