Improvements connected with the Crossheads of Piston-rods for Steam Engines.
Year: 1889

page_text: * of Application, 18th Apr., 1889
omplete Specification Left, 29th Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION
Improvements connected with the Crossheads of Piston-rods for
Steam Engines.
1. EDWARD PINTO DE SOVERAL, now of the Portugese Legation, London, W.
gentleman, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to lessen the friction of the slides of piston rods by
substituting for the sliding face or faces working on or between guides, rollers or
wheels which can be arranged to work in the existing guides of steam engines. To
prevent lateral shifting of such rollers or wheels, they may have a double flange on
their periphery to project over the sides of the guides or a groove may be formed in
the guides and the periphery of the wheel arranged to take into same. The body of
the slide may have several preferably four, rollers attached to take the bearing on the
guides or one large wheel may be used in place of the slide body and rollers the end
of the piston rod, and connecting rod being suitably forked to connect them to the
middle of the wheel by a cross pin passing through eyes in forks, and through centre
of wheel.
Dated this 16th day of April 100
FREDERIC PRINCE,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements connected with the Crossheads of Piston-rods for
Steam Engines.
EDWARD PINTO DE SOVERAL, of Alexandra Hotel, Hyde Park, London, S.W.,
Gentleman, 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 the use of Roller Bearings, for the bearings of the cross-
head of piston rods in place of the usual flat face slides. The great pressure exerted
against the guide face, by the face of the usual slides, by the different angles of the
connecting rod, in working and the blows given, to the face of the guides, by the
slides, by the passing of the cranks, past the centres occasions an amount of friction
or "brakage to the engine and checks to the inertia, that consumes a high percentage
of its effective power, but by the use of Roller Bearings, the friction and other checks
are reduced to a minimum. The invention admits of numerous ways of application
without departing from the same, three different ways of which are illustrated in the
accompanying drawings.
Fig. 1. side elevation of a vertical engine.
Fig. 2. transverse views of fig. 1 at lines a, b, and
Fig. 3. side view of a vertical engine.
Fig. 4. view through line X. Y.
Fig. 5. side view of a cross head with four rollers.
Fig. 6. plan of same.
Referring to figures 1 and 2.
C₁
d.
A, is the frame of engine, of usual form; B, C), the guides of same for the cross-
head D, the bearing parts of which are rollers E, F, held on suitable cross-axle G.
The engine is intended to work in the direction of the arrow, so that the bearing will
be taken by the rollers E, in both the instroke, and the outstroke; if the engine is
reversed in its working the bearing will be taken by the small rollers F, but as such
would be only an occasional occurrence, the small rollers F, will be sufficient for such
Price Rd

page_text: purpose. It is preferred that these rollers F, shall not quite touch the face of the
guide C, when the engine is working on rollers E. The connecting rod H, is of
usual construction, and connected to the axle G, of the cross-head D, by a fork I. To
prevent any lateral play in working the rollers E, work in a groove formed by an
inner flange J, and a bolted on outside plate K, and the standards L, which carry the
rollers F, are arranged to bear against the pendant sides of the guide (. Referring
to figures 3 and 4. In this arrangement, only two rollers M. are used bearing upon a
guide face N the provision for lateral play or reversing of the engine, being provided
for by the foot O, and guides P. This foot O, is preferred not to have any bearing in
the general working of the engine, in the direction of the arrow. H, the connecting
rod; I, fork end of same. Referring to figures 5 and 6. Q is the cross-head guides of
usual construction, R a form of cross-head fitted with four rollers S, with outside
flanges T, to prevent any lateral play, U the piston rod, V, the connecting rod.
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 that what I
claim is :-
1-The manner of using roller bearings, for the sliding bearings of the cross-heads
of piston rods, substantially as described, in the foregoing specification and illustrated
by the accompanying drawings.
2-In the use of roller bearings, for the sliding bearings of the cross-heads of piston
rods, the combination with guide bearings B, and C, of the arrangement of a cross-
head D, fitted with two large rollers E, bearing in grooves in guide bearings, and one
or two rollers F, carried in forked standards L, all substantially as and for the
purposes described in the foregoing specification, and illustrated by the accompanying
'drawings.
3-In the use of roller bearings for the sliding bearings of the cross-leads of piston
rods, the combination with the arrangement of bearings N and P, of a cross-head
fitted with two rollers M and a bearing foot O, substantially as described in the fore-
going specification, and illustrated by the accompanying drawings.
4-In the use of roller bearings for the sliding bearings of the cross-heads of piston
rods, the combination with suitable guide bearings, of a cross-head R, fitted with
rollers S, having flanges T, substantially as and for the purposes described in the fore-
going specification and illustrated by the accompanying drawings.
Dated this 29th day of October 1889
FREDERIC PRINCE,
1, Quality Court, Chancery Lane, London, W.C., Agent for Applicant.