Improvements in Loom Let off Motions.
Year: 1891

page_text: Date of Application, 23rd Feb.,, 1891
Complete Specification Left, 23rd Nov., 1891-Accepted; 9th Jan.,, 1892.
PROVISIONAL SPECIFICATION.
Improvements in Loom Let off Motions.
I, WILLIAM BEGG of 633 Springfield Road, Parkhead, Glasgow, in: the' County
of Lanark, Wire Cloth Manufacturer, do hereby declare the, nature of this invention
to be as follows:-
This invention relates to looms for weaving, more especially wire cloth, and it
consists of improvements in the letting-off motion of such looms.
On the end of the beam carrying the wire or other warp, or of the spindle
carrying the warp beam, is secured a worm wheel in gear with a worm ona vertical
spindle carried in bearings in a bracket piece hung from a lever provided with a
counter weight so adjusted that when the warp beam gives off quickly the worm
wheel acts on the worm as a pinion on a rack and depresses the worm spindle and
with it the end of the weighted lever. From the end of said lever is hung a link at
the lower end of which is a stud or pin forming the centre of a pawl operating: a
ratchet or friction wheel the studior pin being fitted in a slotted lever acted on by
an eccentric on the leddle cam shaft. or other shaft of the loom. On the spindle
carrying the ratchet or friction wheel is fixed a worm gearing with a worm wheel
on the vertical shaft suspended from the counter weighted lever and the rotation
imparted to said vertical shaft is. communicated through the worm on it and the
worm wheel gearing with it the warp beam which. is turned to. a greater or less
extent according as the pawl is lowered more or less into engagement with the
ratchet or friction wheel, the tension on the warp being thus regulated.
Dated this 21st day of February 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Loom Let off Motions.
1, WILLIAM BEGG, of 633 Springfield Road, Parkhead, Glasgow, in the County
of Lanark, Wire Cloth Manufacturer, 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:-
This invention relates to looms for weaving more especially wire cloth, and it
consists of improvements in the letting-off motion of such looms.
The invention is illustrated by the accompanying drawings in which
Figures 1 and 2 are elevations at right angles to each other and
Figure 3 is a plan of part of a wire loom shewing the improved letting off
motion.
On the end of the beam carrying the wire or other warp, or of the spindle A,
carrying the warp beam B is secured a worm wheel C in gear with a worin D on a
vertical spindle E, carried in bearings in a bracket piece F, hung from a lever G,
jointed to a lever H provided with a counter weight 1 so adjusted that when the
warp beam B gives off quickly the worm wheel acts on the worm D as a pinion on
a rack and depresses the worm spindle E and with it the end of the lever G. From
said lever G is hung a link J at the lower end of which is a stud or pin K working
in a slotted lever N on which is centred a pawl L, operating a ratchet or friction
wheel M, the stud or pin K and with it the lever N being acted on by an eccentric O
on the heddle cam shaft P or other shaft of the loom.

page_text: On the spindle Q carrying the ratchet or friction wheel M is fixed a worm or
bevel wheel R gearing with a worm wheel or bevel wheel S, on the vertical shaft E
suspended from the counterweighted lever, or on a sleeve T on said shaft E and
the rotation imparted to said vertical shaft E is communicated through the worm D
on it, and the worm wheel C gearing with it to the warp beam B which is turned
to a greater or less extent according as the pin K moves in the slotted lever N and
the pawl L is lowered more or less into engagement with the ratchet or friction
wheel M, the tension on the warp being thus regulated.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that, what I
claim is
1. The combination of parts constituting the improved let-off motion for looms
substantially as described.
2. In a let-off motion for looms the arrangement in combination with the warp
beam or its spindle of a shaft geared thereto and suspended from a weighted lever
and a pawl and gearing arranged to impart more or less motion to said shaft
according as the weighted lever is acted on by the rotation of the warp beam
substantially as described.
Dated this Twenty-first day of November 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.