Improvements in Heald Machines or Shedding Mechanism of Weaving Looms.
Year: 1898

page_text: Date of Application, 14th July, 1898
Complete Specification Left, 14th Apr., 1899-Accepted, 20th May, 1899
PROVISIONAL SPECIFICATION.
Improvements in Heald Machines or Shedding Mechanism of
Weaving Looms.
We, WILLIAM EDWIN BRIGGS PRIESTLEY, of the Firm of Briggs Priestley &
Sons, of Albion Works, Laisterdyke, Bradford, in the County of York, Manufac-
turers, and WILLIAM DEIGHTON, of 74, Laisterdyke aforesaid, Mechanic, do
hereby declare the nature of this invention to be as follows:-
This invention relates to that type of heald machines or shedding mechanism
of weaving looms in which knives or levers are arranged to both raise and
lower the healds by means of hooks and the present improvements consist in
the method of raising and lowering the upper and lower knives.
For this purpose we employ a separate treadle lever for each knife and we
operate them by rods from crank pins on a double crank disc or its equivalent
having the crank pins diametrically opposite each other and mounted upon the
end of the tappet shaft.
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DRACUP & NOWELL,
Patent Agents, Bradford.
Improvements in Heald Machines or Shedding Mechanism of
Weaving Looms.
We, WILLIAM EDWARD BRIGGS PRIESTLEY, of the Firm of Briggs Priestley &
Sons, Albion Works, Laisterdyke, Bradford, in the County of York, Manufac-
turers, and WILLIAM DEIGHTON, of 74, Laisterdyke aforesaid, Mechanic, 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
staten ent-
This invention relates to that type of heald machines or shedding mechanism
of weaving looms in which knives or levers are arranged to both raise and
lower the healds by means of hooks, and the present improvements consist in
the method of raising and lowering the upper and lower knives.
For this purpose we employ a separate treadle lever for each knife and we
operate then by rods from crank pins on a double crank disc or its equivalent
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page_text: having the crank pins diametrically opposite each other and mounted upon the
end of the tappet shaft.
To fully describe our invention reference is made to the accompanying sheet
of drawings forming a part of this specification, in which similar letters of
reference indicate corresponding parts in each of the figures.
Figure 1, represents a front view of such portions of a loom and heald machine
as are necessary to illustrate the application of our improvements.
Figure 2, is an end view of the same.
The upper knife is of ordinary form and is coupled by the connecting rod B
to the arin C projecting from the rocking shaft D. The shaft D is rocked to
raise and lower the knife A by means of the arm E rigidly fixed to it and coupled
by the rod F connected to its outer end to the crank G adjustably connected to
the arm H fixed to the crank pin J and adjustably secured to the disc K. The
lower knife L is also of ordinary form and is coupled by the rod M to the arm N
projecting from the rocking shaft 0. This shaft is rocked in a similar way to 1)
by its arm P coupled by the rod R to the crank pin J. The disc K is fixed on
the end of the sleeve S mounted so as to freely revolve on the end of the tappet
shaft T, and is driven from the crank shaft V by the pair of equal sized
wheels W, W.
In this arrangement the healds coming down have full play to balance those
going up.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that
what we clairo. is:-
1. A heald machine having an upper and lower knife actuated by independent
levers connected to opposite crank pins on a double crank, substantially as herein
shown and described.
2. A heald machine having an upper and lower knife actuated by independent
levers connected to opposite crank pins on a double crank mounted on the tappet
shaft driven at the same speed as the crank shaft, substantially as herein shown
and described and illustrated in the accompanying drawings.
Dated this 12th day of April 1899.
DRACUP & NOWELL,
Patent Agents, Bradford.