IMPROVEMENTS IN WEFT FORKS AND HOLDERS EMPLOYED IN LOOMS FOR WEAVING
Year: 1883

page_text: LETTERS PATENT to William Bell White of the Red Scar Spring Works,
Colne, in the County of Lancaster for an Invention of IMPROVEMENTS IN
LETTERS PATENT to William Bell White of the Red Scar Spring Works,
Colne, in the County of Lancaster for an Invention of IMPROVEMENTS IN
WEFT FORKS AND HOLDERS EMPLOYED IN LOOMS FOR WEAVING
PROVISIONAL SPECIFICATION left by the said William Bell White at the
Office of the Commissioners of Patents on the 26th January 1883.
WILLIAM BELL WHITE of the Red Scar Spring Works, Colne in the County of
Lancaster IMPROVEMENTS IN WEFT FORKS AND HOLDERS EMPLOYED IN LOOMS
"
FOR WEAVING
"
This invention of improvements in weft forks and holders employed in looms for
weaving consists, firstly, in an improved construction of the fork which I make of
sheet metal-preferably steel-whereby the grinding may be more satisfactorily
effected by being done prior to cutting out or forming the fork. In lieu of the
ordinary socket, barrel, or curve, or of the half socket, half-barrel or half curve
which usually constitutes the central bearing of the fork, I employ a bar of cast
malleable or other suitable metal formed with flanges or ears at each end and
pivots projecting therefrom; the bar being secured to the upper flat side of the
body of the fork by ordinary rivets but preferably by means of projecting pegs or
pins, which are designed to answer the purpose of rivets and are cast on the under
side of the bar which at that part is made flat or recessed between the flanges or
ears in order that a good fit with the sides and surface of the body of the fork
and a secure fastening thereto may be ensured.
The rivetted sockets or bearings as above described may be readily adapted by
means of suitably formed grooves for fastening the legs to the body of the fork
when made separately.
The system of cast pegs or pins is equally applicable for affixing ordinary sockets
or tubular bearings, and pivot bearings upon a metal bar as above described, to
forks other than, as well as, those made of sheet metal. The pivot bearings used
Price G77

page_text: in lieu of the ordinary socket or tubular bearings may also be formed solid with
the fork itself instead of being rivetted or otherwise affixed thereto.
My invention consists, secondly, in providing the holder upon which the fork is
mounted or carried with an adjustable bearing instead of a fixed bearing as here-
tofore in use. This may be effected by the employment of a slotted plate sliding
on the arm of the holder and carrying one of the end bearings which by means of
a fastening screw may be so set up to the socket or bush or to the flanges of the
pivotted bearings as to take up any play caused from time to time by wear and
tear. The slotted plate carrying the adjustable end bearing may also be made, by
means of side flanges of the requisite height, to answer as a stop for determining
the amount of radial sweep to be allowed to the fork.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Bell White in the Great Seal Patent Office on the
21st July 1883.
WILLIAM BELL WHITE of the Red Scar Spring Works, Colne, in the County of
Lancaster IMPROVEMENTS IN WEFT FORKS AND HOLDERS EMPLOYED IN LOOMS
FOR WEAVING
This Invention of improvements in weft forks and holders employed in looms for
weaving consists, firstly, in an improved construction of the fork which I make of
sheet metal-preferably steel-whereby the grinding may be more satisfactorily
effected by being done prior to cutting out or forming the fork. In lieu of the
ordinary socket, barrel, or curve, or of the half-socket, half-barrel, or half-curve
which usually constitutes the central bearing of the fork, I employ a bar of cast
malleable or other suitable metal formed with flanges or ears at each end and
pivots projecting therefrom; the bar being secured to the upper flat side of the
body of the fork by ordinary rivets but preferably by means of projecting pegs or
pins which are designed to answer the purpose of rivets and are cast on the under
side of the bar which at that part is made flat or recessed between the flanges or
ears in order that a good fit with the sides and surface of the body of the fork
and a secure fastening thereto may be ensured.
In the accompanying Drawings Figs. 1, 2, 3, 4, 5, and 6 illustrate the improved
construction of weft fork as above described.
Figs. 1 and 2 shew the initiatory stages in the formation of the body of the fork
and Fig. 3 its configuration when blocked or bent over, such configuration or block,
except as regards the bearing or socket, being similar to that of weft forks in
ordinary use in power looms. It will be observed, however, that the body of my
improved sheet metal fork, being made in the first instance without a socket or
bearing, presents a flat, level, and unobstructed surface on both sides which permits
of its being more readily ground and glazed than if a socket or other projection
were formed upon it. Fig. 4 is the bar of cast malleable or other metal having
flanges or ears a, a, and the pivots b, b,; c, c, are projecting pegs or pins passing
through suitable holes d, d, in the body of the fork (see Fig. 3) and rivetted on the
under side thereof (see Fig. 6). Figs. 5 and 6 shew the metal bar or pivotted
bearing e when in position and rivetted to the fork.
The rivetted sockets or bearings as above described may be readily adapted, by
means of suitably formed grooves, for fastening the legs to the body of the fork
when the legs are made separately-
y-as shewn in Figs. 7, 8, and 9 in which f. f, are
grooves clasping the separate legs g, g, which are turned down at one end and,
passing through the body of the fork, are rivetted underneath, whilst the metal bar
with its rivets c, c, secures them firmly in position.
The system of cast pegs or pins is equally applicable for affixing ordinary sockets
or tubular bearings, and pivot bearings upon a metal bar as above described, to
forks other than, as well as, those made of sheet metal. Figs. 10 and 11 are
respectively side and plan views and Fig. 12 an underneath view shewing the mode
of affixing or rivetting one form of tubular or grooved bearing, provided with ears
a, a, to a flat sheet metal fork by means of cast pegs or pins. Fig. 13 is an under-
neath view of the tubular or grooved bearing (shewn in Figs. 10, 11, and 12)
detached. The pivot bearings, used in lieu of the ordinary socket or tubular
bearings, may also be formed solid with the fork itself instead of being rivetted or
otherwise affixed thereto as shewn in Fig. 14; b, 6, being the pivot bearings formed
in one piece with the body of the fork.

page_text: My Invention consists, secondly, in providing the holder upon which the fork is
mounted or carried with an adjustable bearing instead of a fixed bearing as here-
tofore in use. This may be effected by the employment of a slotted plate sliding
on the arm of the holder and carrying one of the end bearings which by means of
a fastening screw may be so set up to the socket or bush, or to the flanges of the
pivotted bearings as hereinbefore described, as to take up any play caused from
time to time by wear and tear. The slotted plate carrying the adjustable end
bearing may also be made, by means of side flanges of the requisite height, to
answer as a stop for determining the amount of radial sweep to be allowed to
the fork.
Fig. 15 is a plan view and Figs. 16 and 17 are side and end views (partly in
section) of my improved weft fork holder in which i is the arm, j the slotted plate
(shewn detached in Fig. 15), k, k, the end bearings, and the fastening screw which
passes through the slot m into the screw hole n. The side flanges o, o, of the
slotted plate j may be made of any convenient height to answer as stops as herein-
before mentioned. Fig. 18 shews an arrangement by which the setting up of the
bearing may be effected by means of a pointed screw p.
Having now described the nature of the said Invention and the mode of carrying
it into practical effect I would have it understood that what I consider to be novel
and original and therefore claim as the Invention secured to me by the herein-
before in part recited Letters Patent is as follows (that is to say):-
1. The improved weft fork composed of sheet metal and a central bearing
rivetted thereto.substantially as described and shewn in the Drawings.
2. The construction of pivotted and other weft fork bearings having ears or flanges
and cast pegs or pins substantially as described and shewn in the Drawings
for the purpose specified.
3. Constructing weft fork holders with an adjustable bearing substantially as
described and shewn in the Drawings.
In Witness whereof I the said William Bell White have hereunto set my
hand and seal this Eighteenth day of July in the year of Our Lord one thousand
eight hundred and eighty three.
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