Lubricating them. LUBRICATED PISTON FOR STEAM ENGINES
Year: 1886

page_text: Date of Application, 24th Mar., 1886.
Complete Left, 16th Dec., 1886.
Complete Accepted, 18th Feb., 1887.
.
Lubricating them.
JOHN DRURY Railway Terrace, Rastrick Brighouse, Yorkshire Mechanic do hereby
declare the nature of my invention for A LUBRICATED PISTON FOR STEAM ENGINES to
be as follows:-
The object of my invention is to reduce the friction of Pistons for Steam Engines
to a minimum, and to prevent leakage of Steam therein. It consists of a metallic
packing ring composed of segments with lap joints arranged in such a manner as to
receive, confine and distribute the Lubricant equally between the rubbing surfaces.
My method of conveying the lubricated matter is by means of a tube connected to
the piston cover, a grove in the top surface of the packing ring, through which there
are apertures which conveys the lubricant between the rubbing surfaces.
COMPLETE SPECIFICATION.
Improvements in Metallic Pistons and in Methods for
Lubricating them.
J, JOHN DRURY of Railway Terrace, Rastrick, in the County of York, Mechanic 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 my invention is to reduce the friction of pistons for Steam engines to
a minimum, and to prevent leakage of steam therein.

page_text: It consists of a metallic packing ring, composed of segments with lap joints
arranged in such a manner as to receive, confine, and distribute the lubricant equally
between the rubbing surfaces.
My method of conveying the lubricant is by means of a tube connected to the
piston cover, a groove in the top surface of the packing ring through which there are
apertures which convey the lubricant between the rubbing surfaces.
Such being the nature and object of my said Invention, the following is a complete
description of same, reference being had to the accompanying drawings forming a
part of this Specification in which Fig. 1 is a plan view of the improved piston.
Fig. 2 is a side, or edge view of same.
Fig. illustrates one of the segments (of which the entire ring is composed)
detached.
Fig. 4 is section of cylinder, the improved piston, and appliance for conveying
lubrication to the rim of the piston.
Fig. 5 is a plan view.
At 1, 2, 3 are segments (other number than three may be employed) composing the
entire ring shewn at Fig. 1, each segment has an overlap joint 4. 5, so that if the ring
be expanded, the joints are still sealed and steam tight.
Each segment has cast thereto lugs 6, 7, to one of which is secured the stud 8, the
spiral spring 9 thereon being compressed when the parts are put together tends by
pressure upon and against the lugs 6, 6, 6, to expand the piston and so keeps its outer
circumference in close contact with the interior face of the cylinder 10.
In, and around the upper face of the rim of the piston is a groove 11, there being a
like groove around the circumference of the working surface of the piston at 12, and
the two grooves 11, 12 are connected by means of the passage way 13, so that oil or
lubricant supplied to the upper groove 11 passes to the groove 12, within which it is
by the upper and lower working surfaces 14, 15, and by the pressure of the steam
confined until distributed through the movement of the piston over the working surface
of the interior of the cylinder.
At 16, 17, are two pipes, 16 being for passage of lubricant to the groove referred to,
17 being for the escape of air displaced by the incoming lubricant.
18 is a cap or cover for enclosing these pipes, and by using of which the lubricant
is supplied when the screw lid 19 is removed.
19 is the cover on cylinder for reception of pipes 16. 17.
Having now particularly described and ascertained the nature and object of my said
Invention, and in what manner the same is to be employed, I declare that what 1
claim is:
The construction, combination and arrangement of the parts constituting the
improved piston herein described, and substantially as illustrated by the annexed
drawing, the piston having grooves 11. 12, when such grooves are combined and
connected by passage way, such as 13 and às described and illustrated by annexed
drawings.
WALTER BRIERLEY,
Town Hall Buildings, Halifax,
Agent for the said John Drury.