IMPROVEMENTS IN APPLYING METALINE OR SIMILAR ANTI-FRICTIONAL SUBSTANCES
Year: 1878

page_text: LETTERS PATENT to John Gordon, junior, of Dundee, in the County of Forfar,
North Britain, for the Invention of "IMPROVEMENTS IN APPLYING METALINE
OR SIMILAR ANTI-FRICTIONAL SUBSTANCES."
led the 24th June 1879, and dated the 28th December 1878
PROVISIONAL SPECIFICATION left by the said John Gordon at the Office
of the Commissioners of Patents on the 28th December 1878.
JOHN GORDON, junior, of Dundee, in the County of Forfar, North Britain. "IM-
PROVEMENTS IN APPLYING METALINE OR SIMILAR ANTI-FRICTIONAL SUBSTANCES."
This Invention has for its object to render the application of metaline or similar
anti-frictional substances more satisfactory than heretofore, especially in cases in
which the metaline as heretofore applied has been liable to displacement.
The Invention consists in making the sockets or recesses for holding the plugs or
other pieces of metaline or anti-frictional substance of a dovetailed or undercut
or equivalent form, the plugs or pieces being made of a counterpart or corresponding
shapo. With this mode of application the opening at which each piece of metaline
or anti-frictional substance is presented to the rubbing surface being smaller than
the internal part of the socket or recess, the plug or piece cannot get out even if
loose.
The dovetailed or undercut or equivalently-shaped sockets for the metaline or
anti-frictional substance may be formed in whatever way is most convenient in each
But by way of example what are believed to be the best modes of forming
them in certain cases are hereinafter described.
case.
In carrying out the Invention in the case of an ordinary shaft bearing bush or
brass, the plug holes may be bored quite through the bush, and be made wider at
the back or outer side. For such holes the plugs are made taper and are entered
from the back or outer side, and then the backs or outer sides of the holes are
closed by a cover or shell or in any convenient way. According to another modifi-

page_text: cation holes may be bored or otherwise formed in the bush or other bearing or
moving piece so as to be parallel to the rubbing surface, and so as to cut through
such surface and form an opening therein of less width than the broadest part of
the hole, the metaline or anti-frictional substance being entered endways into such
holes.
In carrying out the Invention in the case of a tubular piece which has to slide
on a spindle or rod, as for example a metal loom picker upon the picker spindle,
the metaline or anti-frictional substance is applied in the form of a dovetailed
ring. One side of the recess for the ring is forined within the tubular part of the
picker, and after the metaline or other anti-frictional ring is entered from the end
into its place a metal ring is inserted and fixed by soldering or otherwise and
effectually retains the anti-frictional ring. One, two, or more of such anti-frictional
rings may be applied to one tubular piece in a similar way.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Gordon in the Great Seal Patent Office on the 27th June
1879.
"
IM-
JOHN GORDON, junior, of Dundee, in the County of Forfar, North Britain.
PROVEMENTS IN APPLYING METALINE OR SIMILAR ANTI-FRICTIONAL SUBSTANCES."
My said Invention has for its object to render the application of metaline or
similar anti-frictional substances more satisfactory than heretofore, especially in
cases in which the metaline as hitherto applied has been liable to displacement.
My Invention consists in making the sockets or recesses for holding the plugs or
other pieces of metaline or anti-frictional substance of a dovetailed or undercut or
equivalent form, the plugs or pieces being made of a counterpart or corresponding
shape. With my improved mode of application, the opening at which each piece
of metaline or anti-frictional substance is presented to the rubbing surface being
smaller than the internal part of the socket or recess the plug or piece cannot get
out even if loose.
The dovetailed or undercut or equivalently-shaped sockets for the metaline or
anti-frictional substance may be formed in whatever way is most convenient in
each case, but by way of example, what I believe to be the best modes of forming
them in certain cases are hereinafter particularly described with the aid of a sheet of
explanatory Drawings which is hereunto appended.
In practically carrying out my Invention in the case of an ordinary shaft-bearing
bush or brass, such as is shown in plan in Figure 1, and in vertical section in
Figure 2 of the accompanying Drawings, the plug holes are bored quite through
the bush and are made wider at the back or outer side. For such holes the plugs of
metaline or anti-frictional substance are made taper or conical and are entered from
the back or outer side, and then the backs or outer sides of the holes are closed by
a cover or shell, or in any convenient way. In the Figures the holes are shown filled
with metaline, excepting the top or middle row, which are delineated as unfilled to
show the shape of the holes. The cover or thin shell may be held or partly held by
having its ends entered into grooves formed for it in the end flanges of the bush,
or the cover may be fixed in any other convenient way. Or, again, the bed or seat
in the bearing or bearing cap may be made to accurately fit the outside of the bush,
which formation will prevent the displacement of the plugs.
According to a second modification holes may be bored or otherwise formed in
the bush or other bearing or moving piece so as to be parallel to the rubbing
surface, and so as to, as it were, cut through such surface and form an opening
therein of less width than the broadest part of the hole, the plugs or pieces of
metaline or anti-frictional substance being entered endways into such holes. Figures
3 and 4 of the accompanying Drawings are a section and an inverted plan of a
shaft-bearing bush or brass made according to this modification.
The application of my Invention is specially advantageous in cases in which the
parts to which the metaline or anti-frictional substance is applied have a recipro-
cating motion relatively to each other, it being in such cases that the ordinary
plugs are more liable to get loose. A loom picker with the fixed spindle on which
it reciprocates is a good example of such cases, and in applying my Invention
thereto I fit the picker with a metal eye or tubular piece to slide upon the spindle.
The metal eye of a loom picker may have the metaline or anti-frictional sub-
stance applied to it according to either the first or second modification hereinbefore
described. Figures 5 and 6 are transverse and longitudinal sections of a picker
eye fitted with taper or conical plugs which are held in their places by an external
tube of thin metal.
Figures 7 and 8 are sections as at right angles to each other of an improved con-
struction of loom picker as made with an eye piece furnished with plugs of metaline
or other anti-frictional substance according to my Invention. The body of the

page_text: picker is made of wood or other suitable tough and dense material, and is enclosed
in a shell or covering of thin metal, which also encloses the eye and may be fixed
to the body by rivets or screws or otherwise.
Figure 9 is a longitudinal section of a loom-picker oye in which the metaline or
anti-frictional substance is applied in the form of a dovetailed ring. One such ring
is shown in section and in face view in Figures 10 and 11. The middle part of
the eye is a tube of brass or other metal made with bevilled ends, each of which
ends forms one side of a dovetailed socket for the anti-frictional ring, the other side
of such socket being formed by a metal ring of suitable section applied in each case
after the anti-frictional ring has been entered into its place. The whole is enclosed
in an outer tube of thin metal, which may be rivetted over at the ends to secure
the internal parts; or these [may be fixed by screwing or soldering in the outer
rings or in any other convenient way.
Having thus particularly described my said Invention, and the manner of per-
forming the same, I have to state that I do not restrict myself to the precise
details berein described or delineated, but that what I believe to be novel and
original, and claim as the Invention secured to me by and in terms of the herein-
before in part recited Letters Patent is,-
1. The mode of applying metaline or similar anti-frictional substance wherein
the sockets or recesses for holding such substance are made of a dovetailed or under-
cut or equivalent form, substantially as and for the purposes heroin before described.
2. The making of loom picker eyes or similar reciprocating tubular pieces or
tubular pieces through which spindles or rods reciprocate in the manner herein-
before described with reference to Figures 9, 10, and 11 of the accompanying
Drawings.
In witness whereof, I, the said John Gordon, junior, have hereunto set my
hand and seal, this Twenty-sixth day of June, in the year of our Lord
One thousand eight hundred and seventy nine.
JOHN GORDON, JUB. (L.S.)