Improvements in Loom Pattern Mechanism.
Year: 1890

page_text: Date of Application, 29th Sept., 1890
Complete Specification Left, 14th May, 1891-Accepted, 20th June, 189,
PROVISIONAL SPECIFICATION.
Improvements in Loom Pattern Mechanism.
I, WILLIAM CROWTHER, Loom Tuner, of Spring Terrace, Binn Road,
Marsden, near Huddersfield, Yorkshire, do hereby declare the nature of this
invention to be as follows:-
My invention relates to bowls or pulleys in looms for weaving the like of which
have hitherto been of a flat circular surface around the outward rim of the said
bowl or pulley working on the bottom flat edge of a lever known by the name of
Jacks.
The two flat surfaces of which are liable to slip or slide from off each other and
to cause the inaction of the heald or box on which it operates for the time being
with consequent damaging of the cloth and in some cases of breakage of the
machinery.
The mode that I propose to adopt to evade the slipping or sliding of the said
bowls or pulleys from off the said levers or jacks is the following-that is to say,
I propose to cut in each bowl or pulley a groove or indenture around the rim or
edge and on the levers or jacks I propose to make them with an elevation or ridge
in the centre so that the said ridge or elevation will when in position be in the
groove or indenture of the said bowl or pulley and will consequently hold the said
lever or jack in position until it has completed its work.
Or I may cut the groove in the lever or jack and cut the bowl or pulley with an
elevation on the the rim or edge which would accomplish the same improvement.
Dated September 27th 1890.
WILLIAM CROWTHER,
Spring Terrace, Binn Road, Marsden, near Huddersfield, Yorkshire.
COMPLETE SPECIFICATION.
Improvements in Loom Pattern Mechanism.
1, WILLIAM CROWTHER, Loom Tuner, of Spring Terrace, Binn Road, Marsden,
near Huddersfield, 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 has reference to certain improvements in the pattern mechanism of
looms for weaving.
Hitherto the bowls or pulleys and jack levers or vibrator levers of such mechanism
have been constructed with flat surfaces for them to work against each other.
It is found in working that such flat surfaces are apt to slip or slide off each other,
and thereby cause the inaction of the heald or box, which is operated on for the
time being, with consequent damaging of the cloth, and in some cases breakage of
the machinery.
The object of my invention is to so construct such bowls or pulleys and jack
levers or vibrator levers that they shall be constrained to work without the slipping
or sliding off each other aforesaid.

page_text: Fig. 3, is a side elevation of jack lever or vibrator lever and bowl or pulley in
accordance with my improvements.
Fig. 4, is a sectional end elevation of Fig. 3, on the line A, B.
Fig. 5, is a side elevation of jack lever or vibrator lever and bowl or pulley in
accordance with modification of my invention.
Fig. 6, is a sectional end elevation of Fig. 5, on the line A, B.
Hitherto the jack levers C have been constructed with flat surfaces D, and the
bowls or pulleys E have been constructed with corresponding flat surfaces, see
Figs. 1 and 2.
I prefer to carry out my invention as follows:-
I construct the jack lever or vibrator lever C with a V shaped groove or
indenture F, and the bowl or pulley with a V shaped projection, rim, or ridge
adapted to work in the said groove or indenture, (see Figs. 3 and 4) or vice versa.
Or I may construct the bowl or pulley E with a U or semicircular shaped groove G,
and the jack lever with a ridge or projection H adapted to work therein, (see
Figs. 5 and 6) or vice versa.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what
I claim is
1. In loom pattern mechanism the employment of jack levers or vibrator levers
and bowls or pulleys constructed so that the said levers and bowls or pulleys are
constrained to work without slipping or sliding off each other substantially as and
for the purposes set forth.
2. In loom pattern mechanism the employment of jack levers or vibrator levers
having ridges or grooves, in combination with bowls or pulleys having grooves or
ridges, to work in conjunction with the ridges or grooves upon the jack levers or
vibrator levers, as and for the purposes such as shown and described.
Dated th 1941 1
...idol
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Agent for the Applicant.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Agent for the Applicant.