AN IMPROVED METHOD OR MEANS OF ATTACHING TOGETHER THE 'HOOKS AND JACKS' EMPLOYED IN LOOMS FOR WEAVING
Year: 1877

page_text: LETTERS. PATENT to James Harrop Buckley, of London, in the County of
Middlesex, and Robert Firth Barber, of Marsden, near Huddersfield, in the
County of York, for the Invention of "AN IMPROVED METHOD OR MEANS OF
ATTACHING TOGETHER THE 'HOOKS AND JACKS' EMPLOYED IN LOOMS FOR
WEAVING."
Sealed the 6th October 1877, and dated the 4th June 1877.
PROVISIONAL SPECIFICATION left by the said James Harrop Buckley and
Robert Firth Barber at the Office of the Commissioners of Patents on the 4th
June 1877.
JAMES HARROP BUCKLEY, of London, in the County of Middlesex, and ROBERT
FIRTH BARBER, of Marsden, near Huddersfield, in the County of York. "AN IM-
PROVED METHOD OR MEANS OF ATTACHING TOGETHER THE
EMPLOYED IN LOOMS FOR WEAVING."
HOOKS AND JACKS'
=
This Invention relates to an improved method or means of attaching together the
"jacks and hooks" employed in looms for weaving for actuating the "shed."
Hitherto the "jack levers and hooks" have usually been secured together by
means of a screw passing through a hole in the rounded head of the "jack lever,"
and thence through a screwed hole in the end of the hook and rivetted at the back;
this has been found to be very inconvenient, liable to get out of order, and work
loose by the action of the said levers.
Our Invention consists in cutting a recess in the rounded head of the "jack
lever" (of such a shape as to allow the desired rise and fall of the jacks) which fit
into the end of the hook.
We also cut a vertical dovetailed groove in the end of the hook through which we
drive a corresponding "key" passing through the said recess in the end of the jack
lever; this key may be rivetted at top and bottom to hold it firmly in its place, or
the groove may be made tapered and the key wedge shaped, in which case there
would be no necessity for the rivets, as the key would always have a tendency to
fall by its own weight and keep wedged tightly in the groove. The key holds the
rounded head of the "jack" in the hook, and at the same time allows freedom of
rising and falling to the "jack."

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Harrop Buckley and Robert Firth Barber in the Great Seal
Patent Office on the 3rd December 1877.
JAMES HARROP BUCKLEY, of London, in the County of Middlesex, and ROBERT
FIRTH BARBER, of Marsden, near Huddersfield, in the County of York.
"AN IM-
PROVED METHOD OR MEANS OF ATTACHING TOGETHER THE HOOKS AND JACKS'
EMPLOYED IN LOOMS FOR WEAVING."
This Invention relates to an improved method or means of attaching together the
top "jacks and hooks" employed in looms for weaving for actuating the "shed."
Hitherto the "jack levers" and hooks have usually been secured together by
means of a screw passing through a hole in the rounded head of the "jack lever,"
and thence through a screwed hole in the end of the hook and rivetted at the back;
this has been found to be very inconvenient-and-liable-to-get-out of order and work
loose by the action of the said levers.
"
Our Invention consists in cutting a recess in the rounded head of the "jack lever'
(of such a shape as to allow the desired rise and fall of the jacks) which fits into
the end of the look.
We also cut a vertical dovetailed groove in the end of the hook, through which
we drive a corresponding key passing through the said recess in the end of the
jack lever. This key may be rivetted at the top and bottom to hold it firmly in
its place, or (which is preferable) the groove may be made tapered, and the
key wedge shaped, in which case there would be no necessity for the rivets, as
the key would always have a. tendency to fall by its own weight and keep
wedged tightly in the groove. The key holds the rounded head of the "jack
in the hook, and at the same time allows freedom of rising and falling to the
"jack."
Such being the nature and object of our said Invention, we will now describe in
detail the manner in which the same is to be or may be performed or carried into
practical effect, and in order that the same may be clearly understood, we have
annexed hereunto a Sheet of Drawings illustrative thereof, and have marked the
same with figures and letters of reference corresponding with those in the following
explanation thereof.
Fig. 1 in the annexed Drawings shows the usual method of connecting the "jack"
with the "hook," a, a*, being part of the "hook," and b, 6*, one end of the "jack."
The rounded end 6* of the jack is secured into the recessed end of the hook a* by
means of a screw c passing through a hole in the jack and into a screwed hole in
the hook at the back of which it is rivetted.
In our improved arrangement no screw pin or rivet is employed. In the first
place we enlarge the hole in the hook as shown in elevation at Fig. 2, and in section
at Fig. 3. We then form a screw or groove in the end of the "jack," as shown at d,.d,
in Fig. 4, and we make a stud or filling piece c, e, seo. Figs. 5 and 6, one part of
which fills the enlarged hole in the hook, and the other passes through the hole in
the end of the "jack."
In the face of the hook a, a*, and through the face of the. filling piece, we then
cut a vertical taper dovetailed groove ff, to which we fit a taper key-g,-g, formed
-with-Vedges (see Fig. 7). This key being driven downwards into the vertical
groove ff, will hold the hook filling piece and jack all together firmly, and at. the
same time the recess.d, d,-will-allow-of-the-free-movement-of-the-jack, as shown at
Fig. 8.
The above is the method which we adopt in altering the present form of jack and
hook.to our improved construction, but in making new jacks we dispence with the
falling piece e, e, altogether, and cast a pap on the back of the jack, as shown at h; h,
in the section Fig. 9, and complete at Fig. 10.
Sometimes, instead of cutting the recess in the end of the jack, we leave the head
flat on side, as shown in section at Fig. 11, and complete at Fig. 12, recessing the

page_text: hook a little deeper and making the head of the jack rather thinner, so that the key
groove is only cut into the hook.
In some cases the keys may be entirely dispensed with by passing the "jacks"
through a grating placed near the heads thereof.
We also propose to make the "jacks" double headed, that is, with a head at
each end, as shown in the reduced view, Fig. 13, in order that if one end
should become broken off, the jack may be reversed and again utilized.
In order to prevent the keys g. 9, from working loose or coming out, their lower
ends may be slightly bent back by means of a pair of pliers after they are
driven in.
Having now described the nature and object of our said Invention, together
with the manner in which the same is to be or may be performed or carried
into practical effect, we wish it to be understood that we claim as our
Invention,
The several methods as herein-before described (and illustrated by the annexed
Drawings), of connecting the hooks and top jacks together without the use of screws,
pins, or rivets, or any mere imitation or modification thereof, constructed in sub-
stantially the same or a similar manner.
We also claim making the "jacks" double headed for the purpose above described.
In witness whereof, I, the said Robert Firth Barber (on behalf of myself and
the said James Harrop Buckley), have hereunto set my hand and seal,
this Twenty-seventh day of November, in the year of our Lord One thousand
eight hundred and seventy-seven.
ROBERT FIRTH BARBER. (L.S.)