AN IMPROVEMENT IN SPHERICAL ENGINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We RICHARD HAMMERSLEY HEENAN and RICHARD HURREL FROUDE both of
Newton Heath Iron Works, Manchester in the County of Lancaster, Engineers, do
hereby declare the nature of our invention for "AN IMPROVEMENT IN SPHERICAL
ENGINES" to be as follows:—
Our invention relates to spherical engines of the kind described in the Speci-
fication No 3953 of 1879 wherein there is a spherical shell within which revolve
and oscillate an equatorial piston disc and two semicircular blades jointed to the
piston. The objects which we have in view by our present invention are to
simplify and cheapen the jointing of the blades to the piston and to provide for
replacing the parts of the jointing that are subject to wear. Through the middle
plane of the piston we bore a hole through which we pass a pin extending both
ways into cylindrical recesses bored at the edge of the piston, the projecting ends
constituting the joint pins for one of the blades. We also through the middle
plane of the piston bore another hole at right angles to the former and into this
hole we introduce from opposite sides the two joint pins for the other blade, one of.
those having its diameter reduced to pass through a hole in the first mentioned pin
and to screw into a threaded hole in the opposite pin. We bore the lugs of the
two blades with cylindrical holes larger than the projecting pins, and in these
holes we fit thimble bushes, which fit on the pins, and which when worn can be
taken out, fresh thimbles being substituted for them.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.
COMPLETE SPECIFICATION.
We, RICHARD HAMMERSLEY HEENAN and RICHARD HURREL FROUDE both of
Newton Heath Iron Works, Manchester in the County of Lancaster, Engineers, do
hereby declare the nature of our invention for "AN IMPROVEMENT IN SPHERICAL
ENGINES" and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :—
Our invention relates to spherical engines of the kind described in the Speci-
fication Nº 3953 of 1879 wherein there is a spherical shell within which revolve
Die A.71

page_text: and oscillate an equatorial piston disc and two semicircular blades jointed to the
piston. The objects which we have in viow by our present invention are to
simplify and cheapen the jointing of the blades to the piston and to provide for
replacing the parts of the jointing that are subject to wear. Through the middle
plane of the piston we boro a hole through which we pass a pin extending both
ways into cylindrical recesses bored at the edge of the piston, the projecting ends
constituting the joint pins for one of the blades. We also through the middle
plane of the piston boro another hole at right angles to the former and into this
hole we introduce from opposite sides the two joint pins for the other blade, one of
these having its diameter reduced to pass through a hole in the first mentioned pin
and to screw into a threaded hole in the opposite pin. We bore the lugs of the
two blades with cylindrical holos larger than the projecting pins, and in these
holes we fit thimble bushes, which fit on the pins and which when worn can bo
taken out, fresh thimbles boing substituted for them.
Fig. 1 of the accompanying drawings is a front view and Fig. 2 is an edge view
of the equatorial piston of a spherical engino having its joint pins fitted therein
according to our invention. Fig. 3 shews the joint pins themselves separately.
Through the central plane of the piston A we bore a hole into which we fit the
joint pin B, its two ends projecting beyond the central boss of the piston. At right
angles to this hole we boro another hole to receive the other pin which is made in
two parts B1 and B2. Of these B' is made with an end b of smaller diameter to
pass through a hole in B and into a hole of B2 into which it is screwed tightly and
then, to prevent it from unscrewing, a pin b' is driven through a hole in it and
corresponding holes through A. On the ends of the pins B, B and B are fitted
thimble bushes C (one of which is shewn in section in Fig. 1). These are screwed
into the lugs D of the semicircular blades and provented from turning in the
lugs D by a cross pin c.. When the bushes and pins become loose by wear, fresh
bushes C can be readily fitted on the pins and in the lugs.
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
The herein described construction of the jointings of the semicircular blades to
the equatorial piston of a spherical engine.