Improvements in Loom Pattern Mechanism.
Year: 1891

page_text: Date of Application, 17th Nov., 1891
Complete Specification Left, 4th Aug., 1892-Accepted, 15th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Loom Pattern Mechanism.
We, ROBERTS BEAUMONT, Professor of Textile Industries, of the Yorkshire
College, Leeds, and GEORGE WASHINGTON, Assistant Lecturer of the said College,
do hereby declare the nature of this invention to be as follows:-
Our invention has reference to certain improvements in loom pattern mechanism.
The object of our said invention being to obtain a varying height of the pieces
which actuate the levers connected with the healds for moving the warp, and in a
more expeditious manner than heretofore.
In carrying out our said object we employ cams of a triangular or other suitable
shape, having oblong holes by which they can be fixed upon rods, the said rods
being arranged one under the other or side by side, and which may have flat sides
or surfaces where they meet each other. The eccentricity of the said oblong holes
being such that the said cams can be fixed on the rods at different or varying
heights.
The rods are secured in position so as to make up a chain or band by links having
similar or the like oblong holes to the cams or strikers at one end, and circular holes
at the other. By means of the said links and rods the pattern can be altered without
removing the cams from the rods, the positions of the cams being changeable when
one of the rods is withdrawn.
The improved chain as set forth traverses a cylinder (preferably constructed out
of the solid but may be constructed otherwise) having shoulders or ridges provided
with ledges upon which rest the cams as the chain goes round, the said cams having
projections for resting upon the said ledges, so that the strain upon the rods is taken
off or diminished, and the rods are provided with double triangular pieces so that
the chain will move steadier upon the slide (where such is employed) and over the
cylinder, which is specially adapted for the purpose, as is also the loose or fixed
cylinder for regulating the tension of the chain, or otherwise.
Further, we also provide a rod arrangement connected with suitable bases or ends,
for supporting the rods or links of the chain during the changing of the pattern by
altering the cams, whereby the said operation is facilitated.
Lo 1001
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Loom Pattern Mechanism.
We, ROBERTS BEAUMONT, Professor of Textile Industries, of the Yorkshire
College, Leeds, and GEORGE WASHINGTON, Assistant Lecturer, of the said College,
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:-
Our invention has reference to certain improvements in loom pattern mechanism.
The object of our said invention being to obtain a varying height of the pieces
which actuate and determine the movements of the levers connected with the heald
shafts, shuttle-boxes and picking arms, in a more expeditious manner than hereto
fore; and our said improvements are equally applicable for operating dobbies or
engines in which bowls and bushes, or lags and pegs are at present employed.

page_text: DESCRIPTION OF DRAWINGS.
Fig. 1, is a reduced plan of portion of the pattern chain.
Fig. 2, is a side elevation in section showing the pattern chain passing over the
cylinder.
Fig. 3, is a plan of the cylinder.
Fig. 4, is a plan of the central portion of the rods showing means employed when
necessary for strengthening them (so as to relieve strain at this position upon the rods)
which consists of a boss or other such means formed upon or secured to the rods D;
usually two straight rods are employed.
Fig. 5, is an end elevation partly in section illustrating device for supporting the
pieces during the changing of the pattern so that the oblong holes are opposite one
another to facilitate the re-insertion of the rod withdrawn to effect the change.
Fig. 6, is a perspective view, Fig. 7, an end elevation, Fig. 8, a side elevation, and
Figs. 9 and 10 are plans of the pieces or cams used in constructing the chains."
Fig. 11, is a side elevation of another form of cam.
Fig. 12, is a plan, and Fig. 13 a side view of the links.
In carrying out our said object we employ pieces, cams, or strikers A, of a
triangular or other suitable shape, (which may be varied to suit different looms)
having oblong holes B, by which they can be fixed upon rods C and D, the said
rods being arranged side by side.
The rods D are secured by cotter pins D¹ so that they can be withdrawn when
required. The rods C'are fixed and secured by rivets C¹ or by any other convenient
method.
The eccentricity of the position of the said oblong holes B being such that the
cams or strikers A. can be fixed on the rods at different or varying heights, that is
from operative to inoperative positions, see Fig. 2; the said oblong holes allowing the
cams or strikers A to be turned on the rods, as required by change of pattern, and
as hereinafter explained.
The rods C and D are secured in position so as to make up a pattern chain by
links E havings holes F.
The pattern can be altered without removing the cams or strikers from the fixed
rod C, the position of the cams or strikers being changeable when the rod D is
withdrawn.
The improved chain as set forth traverses a cylinder G (preferably constructed
out of the solid, but it may be constructed otherwise) having shoulders or ridges H
provided with ledges J upon which rest the cams or strikers A as the chain goes
round, the said cams or strikers having projections J' for resting upon the said
ledges so that the strain upon the rods is taken off or diminished.
The shoulders or ridges H of the cylinder G are also constructed with flat
portions K for the links, so that sideways or lateral motion of the chain is prevented
during its traverse.
The cams or strikers A may be small castings or constructed of sheet metal (see
Figs. 6, 7, 8, 9 and 10,) by stamping them out in one piece, or other convenient
number of pieces, and by means of a device L (made of a piece of sheet metal and
formed to the shape of the oblong hole B into which it is inserted) they are secured
at proper distances apart and strengthened on the rods, see Figs. 6, 7, 9 and 10.
To facilitate the alteration of the pattern chain we employ a frame such as shown
in Fig. 5, consisting of a grooved rod O carried upon two ends or bases P. The
rods and links of the pattern chain rest on the ends P and the projections of the
cams or strikers in the grooved rod or bar O.
To modify the pattern the loose rod D is withdrawn in each case and any cam or
striker A which requires altering is then lifted up and turned ou the fixed rod C,
the opposite end of the cam or striker A falling into the groove of the rod 0, and
so placing the oblong hole opposite the others, so that the loose rod can be readily,
inserted again.

page_text: The construction of the pattern chain is such that the alterations can easily be
made by hand without the use of the frame P and grooved rod O.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In loom pattern mechanism, the employment of an eccentric piece or cam
having an oblong hole for receiving two rods, and projections to rest upon the
cylinder, as and for the purposes shown and described.
2. In loom pattern mechanism, the employment of an eccentric piece or cam
having an oblong hole in combination with two rods and end links which bring the
pieces or cams into their proper position for actuating the levers, as shown and
described.
3. In loom pattern mechanism, the employment of eccentric pieces or cams having
projections in combination with a cylinder mounted with ledges to support the pieces
or cams when actuating the levers and to remove the strain off the rods, as shown
and described.
4. In loom pattern mechanism, the combination of a pattern chain composed of a
series of eccentric pieces or cams having projections, and oblong holes by which
they are fixed upon pairs of rods joined by end links, and a cylinder constructed
with shoulders having ledges for the pieces or cams to rest upon, as and for the
purposes shown and described.
DL: 9-1 1
1000
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicants.
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicants.