Improvements in Guides for Piston Rods, Pump Rods, Slide Valves, and the like.
Year: 1897

page_text: Date of Application, 29th Oct., 1897
Complete Specification Left, 29th July, 1898-Accepted, 29th Oct.,
1898
PROVISIONAL SPECIFICATION.
Improvements in Guides for Piston Rods, Pump Rods, Slide Valves,
and the like.
I, WILLIAM KIRKALDY, of 16, Derby Street, in the City and County of Glasgow,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to save power by reducing the frictional resistance
of guides for piston rods, pump rods, slide valves and the like when moving
under pressure, by substituting rollers or flanged wheels for guide-blocks or sliding
planes and the like which rub on guide-plates and the like; or by placing loose
or fixed rollers in the slippers of guide blocks, or between the rubbing surfaces
of sliding planes and guide-plates.
The periphery of rollers or wheels and the surfaces of guide-plates on which they
press or roll are hardened, and both surfaces coincide with each other when the
periphery of rollers are of other form than parallel, viz., concave, convex, corru-
gated, globular and the like. The slippers of guide-blocks form frames in which
the rollers are placed, and they may be adjustable with sides projecting over edges
of guide-plates; or the guide-plates adjustable with flanged sides to prevent lateral
motion of guides when moving longitudinally under pressure.
1007
WILLIAM KIRKALDY.
Improvements in Guides for Piston Rods, Pump Rods, Slide Valves,
and the like.
I, WILLIAM KIRKALDY, of 16, Derby Street, in the City and County of Glasgow,
Engineer, 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 object of this invention is to save power by reducing the frictional resistance
of guides for piston rods, pump rods, slide valves and the like when moving under
pressure by substituting rollers or wheels of suitable form for guide-blocks or
sliding planes and the like which slide and rub on guide plates and the like or
by placing rollers in guide-blocks or crossheads or between the rubbing surfaces of
sliding and stationary planes or on axial pins fixed in cranks and the like.
The periphery of rollers or wheels and the surfaces of guide plates or guides on
which they press and roll are hardened and both surfaces coincide with each other
when the periphery of said rollers or wheels are of other form than parallel,
miz.. convex, concave, globular and the like.

page_text: The invention is shown on the accompanying drawing in which,
Figure 1, is an end elevation of a horizontal steam engine.
Figure 2, a plan of same,
Figure 3, a detailed sectional view to a larger scale of rolling guide and guide
plates.
The same reference letters indicate corresponding parts in all the views.
Referring to accompanying drawing and to Figures 1 and 2, it will be found
that the piston and connecting rod guides are formed by two globular rollers A
which revolve on axial bearings at end of crosshead C, and roll in guide plates B;
and that the guide on tail end of piston rod is formed by a block C¹, fixed to end
of rod and recessed to receive a circular roller A¹ which rests and travels in a
recessed guide plate B¹.
The guides at back of valve D, are formed by fixing to casing door P, at back
of valve, springs S to which the parallel bars T, are secured and the bars T have
rollers R at their ends pressing on facing strips on back of valve D, and between
the springs S.
The guides at bottom of valve D are formed by fixing to bottom of valve rollers R¹
which rest and travel or roll on a plane below the valve at right angles to its face.
Figure 3, shows an enlarged sectional view of axial bearing on crosshead C, on
which the globular rollers A revolve, and also the means for lubricating the
bearing.
The globular rollers A, may be bushed with suitable metal and the guide
plates B in which they roll or travel may be in one piece or in two parts and
adjustable.
The form and number of rollers and arrangement of parts herein before described
may be varied to suit different types of engines and guides without departing
from the spirit of the invention and I do not therefore limit myself specifically to
any such forms and arrangements.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare what I claim is:-
1. Rolling globular or circular guides formed by combining crossheads or
blocks furnished essentially with rollers or wheels of suitable form, and guides
or guide-plates on or between which the rollers or wheels rest or roll and the
bearing surfaces of which coincide with the periphery of said rollers, for the pur-
poses herein before mentioned, substantially as described.
2. Roller guides for cylinder slide valves and the like, substantially as described.
Dated this Twontre careanth dov of T... 1000