Improvements in Antifriction Joints.
Year: 1897

page_text: Date of Application, 28th Aug., 1897--Accepted, 30th Oct.,
1897
COMPLETE SPECIFICATION.
Improvements in Antifriction Joints.
We, NELSON MOORE of Butte City, County of Silver Bow, Montana, U.S.A.,
Foreman, and WILLIAM THOMPSON of same place, Merchant, 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:-
The joint between the eccentric of an engine and the rod connecting the slide
valve or other working part with said eccentric, it is well known, provides for a
movement between the parts through a very small arc. The joints now required
between two such parts require much lubrication and are liable to much wear.
This invention is designed to obviate these disadvantages by providing a joint in
which friction is reduced to a minimum, only slight or no lubrication required,
and the durability of the joint increased.
In the accompanying drawing Fig. 1 is a perspective view of the adjacent
ends of two bars furnished with the antifriction joint of this invention. Fig. 2 a
longitudinal section of the same. Figs. 3, 4, 5, detail perspective views of the
respective bars and of one of the clamping plates.
The bar which may be a pitman, crank, or other operative part of machinery
is formed with a transverse slot 2 into which projects the end of a fastening
screw 3 and has its outer end formed with a V shaped extension 4. The outer
end of said bar on each side of the extension has a curved recess forming
shoulders 5 and lips 6. The other bar 7 which may be any other operative part
of machinery is provided with a V shaped recess 8 at its outer end whose edges 9
lie at a greater angle to one another than the edges of the ✓ shaped extension 4
on the bar 1. The outer end of the bar is also curved, as shewn, and the upper
and lower sides thereof are formed with lips 10. Upon the sides of the bar 7 are
formed triangular lugs 11 with slightly curved convex sides and apices in a line
with the apex of the V shaped recess 8. Fitting upon the outer sides of both of
the bars 1 and 7 are clamping plates 12 having rectangular slots 13 registering
with the slot 2 in the bar 1 and are adapted to be held in place against said bar
by means of a key 13 passing through said aligned slots. Each clamping plate
has also a slot 14 in which the lugs 11 fit the sides of said slots being slightly
concave and lying at a greater angle to one another than the sides of the lugs.
The clamping plates are adapted to fit in recesses in the sides of the bars 1, 7, to
prevent their lateral displacement and are securely fastened by means of the
key 13 and screw 3.
When the parts are in the assembled position the extension 4 of the bar 1 fits
in the recess 8 of the bar 7, with the curved ends of this latter slightly separated
from the shoulders 5 and with the lips 10 fitting between the lips G
"The apices
of the lugs 11 fit within the apices of the triangular slots 14 in the clamping
plates 12, so that knife edged pivot points which are in a line are formed
between the two bars 1, 7. A free movement of the two bars is permitted through
a small arc, friction between the parts is reduced to a minimum and lubrication
is either quite unnecessary or only slightly necessary.

page_text: 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 claim is:-
1. In a device of the kind referred to, the combination with a pitman or other
operative part of a piece of machinery having a V shaped extension at one end,
of a second operative part having-a V shaped recess in its outer end into which
said extension is adapted to fit and whose edges lie at a greater angle to one another
than the edges of said extension, triangular lugs upon the outer sides of the part
provided with said recess, and clamping plates adapted to fit over said parts and
provided with triangular openings in which said lugs are adapted to fit and move,
for the purpose specified, substantially as described and shewn.
2. In a device of the kind referred to, the combination with a pitman or other
operative part of a piece of machinery having a V shaped extension at one end,
of a second operative part having a V shaped recess in its outer end into which
said extension is adapted to fit and whose edges lie at a greater angle to one
another than the edges of said extension, triangular lugs upon the outer sides of
the part containing said recess whose apices are in a line with the apex of said
V shaped recess, and clamping plates adapted to be secured to the sides of said
parts, having triangular openings therein within which said lugs are adapted to
fit and move and whose sides lie at a greater angle to one another than the sides
of said lugs, for the purpose specified, substantially as described and shewn.
3. The general construction, arrangement, and combination of parts constitut-
ing the antifriction joint, substantially as described and shewn.
Dated this 90th love of 1007
THOMAS R. SHILLITO,
89 Chancery Lane, London, W.C., Agent for the Applicants.