IMPROVEMENTS IN JACKS FOR LOOMS
Year: 1884

page_text: I, JOHN REBBLA, of No. 9, Dial Terrace, Clark's Lane, Bank, Leeds, in the
County of York, Power Loom Overlooker do hereby declare the nature of my
Invention for IMPROVEMENTS IN JACKS FOR LOOMS, to be as follows:-
The improvement consists in making the joint for attaching the horizontal jack
to the vertical jack blade, without pins or rivets, so that the same may be easily
attached or detached, and still be impossible for the said joint to become detached
when working.
The improvement consists in making an opening nearly at the bottom of the
vertical jack or jack hook, with a groove or recess at the back of the said opening,
for receiving a thin web or dowel, which is cast ou the end of the horizontal jack,
the said web and groove is for preventing the two jacks from becoming detached
side ways; then to prevent the horizontal and vertical jacks from becoming
detached endways, there is cast nearly at the end of the horizontal jack, two
projecting pieces, one on the upper edge of the said horizontal jack, and one on
the lower edge of the same, which projections exactly fit into the front part of the
aforesaid opening in the vertical jack or jack hook, and which projections form the
rubbing surfaces of the joint.

page_text: I, JOHN REBBLA, 9 Dial Terrace, Clark's Lane, Bank, Leeds, Yorkshire, Power
Loom Overlooker, do hereby declare the nature of my Invention for "IMPROVE-
MENTS IN JACKS FOR LOOMS," and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
This improvement consists in making the joint for attaching the horizontal jack
to the vertical jack or jack blade without pins or rivets, so that the same may be
easily attached or detached and still be impossible for the said joint to become
undetached when working, this is effected by making an opening at the bottom of
the vertical jack or jack hook with a groove or recess at the back of the said
opening for receiving a thin semi-circular dowel or feather which is cast on the
end of the horizontal jack, the said feather and groove are for preventing the two
jacks from becoming detached sideways, and to prevent the said horizontal and
vertical jack from becoming detached endways, there is cast nearly at the end of the
horizontal jack two projecting pieces, one on the top edge of the horizontal jack,
and one on the lower edge of the same, which projection exactly fits into the front
of the opening in the vertical jack or jack hook.
In order that this Invention may be better understood reference is made to the
accompanying Sheet of Drawings, wherein Fig. 1 is elévation of the parts when
put together, A. being the jack hook and B the jack lever. It will be observed that
the jack hook is cut away to receive a corresponding shaped part formed on the
jack lever, whilst the dowel or part C enters a slot D formed in the hook which
slot is shewn in end view Fig. 2. As is well known the lever B operates the
hook A up and down in a vertical direction, and in so doing the round part E
forms a kind of fulcrum for operating the hook. Fig. 3 shews position of the
parts when they are being put together, but after the lever is placed at right angles
to the hook as seen in Fig. 1 the two parts cannot become detached, as the amount
of movement which the joint receives is very little.
By this means rivets and screws hitherto employed for connecting the hook and
lever together are dispensed with and the evils arising from the screw working out
are avoided.
Although I have shewn and described the slot D as being made in the hook,
and the dowel C as being on the lever, it will be understood that these parts may
be made visa-versa.
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 peculiar method herein shewn and described for connecting jack hooks to
levers,