Improvements are Applicable to Steam-engines Generally.
Year: 1886

page_text: Improvements are Applicable to Steam-engines Generally.
We, OTTO LILIENTHAL, of Berlin, in the Empire of Germany, and WILLIAM
BASHALL,' of 21 Holland Villas Road, Kensington, in the County of Middlesex,
Engineers, 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 :-
Our invention relates to an improved construction of connecting rod for the feed
pumps of steam engines, according to which the plunger of the pump can be made
to perform its normal functions without moving the eccentric sheave to which it is
connected, as well as to an improved stuffing box for use with a pump fitted with
the former part of our invention, and throughout steam engines fitted therewith..
The first part of the invention consists in making the connection between the
strap of the eccentric and the connecting rod of the plunger by means of a knuckle
joint, instead of rigid as at present. The eccentric strap is prolonged into a hand
lever which lies idly by the side of the connecting rod so long as the pump is being
worked by the engine and which can therefore be used to work the pump by using
it as an ordinary pump handle, a second knuckle joint being introduced to allow of
the plunger rod making its usual rectilinear stroke.
.
In order that our invention and the means by which the same may be carried
into practical effect may be thoroughly understood, we will proceed to describe the
same in detail, referring in so doing to the accompanying drawings which are to be
taken as part of this specification and read therewith, and in which like parts are
marked throughout with the same reference letter.
•
Fig. 1 is a front elevation and Fig. 2 is a side elevation, both partly in section,
illustrating our improved connecting rod.
Fig. 3 is a sectional elevation of the improved stuffing box we use with our
improved feed pumps.
A is the ordinary eccentric sheave, and B its strap.
The strap (preferably the lower half b) is prolonged downwards into a hand
lever C.
D is the plunger rod of the pump and is connected to the eccentric strap by a
pair of links E, E, connected to the top of the plunger rod by a fork F and knuckle
joint G, and to the underside of the strap by a second joint as already stated.

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It is not necessary to the success of our invention that two links should be used,
but we prefer to use a pair for constructional reasons.
The links E, E¹ produce a space in which the lever C conveniently hangs when
not required for its special duty, and in which it is confined by means of a spring
detent of any convenient type.
The one illustrated in Fig. 1 consists of a pin c working upwards through the
shank f of the fork. The nose o' is forced into a hole in the lever C, made to receive
it, by a spiral spring c², and can be withdrawn therefrom by the thumb piece c³.
Figs. 3 to 8 illustrate the second part of our invention.
Fig. 3 is a sectional elevation of our improved stuffing box.
Figs. 4, 5, and 6 are, respectively, plan, elevation, and inverted plan of the split
thimble.
Figs. 7 and 8 are, respectively, elevation and inverted plan of the nozzle
and saucer.
H is the stuffing box and h the cavity containing the packing.
I is the nozzle screwing down upon the packing and having its upper edge
expanded into a saucer I¹.
Vertical grooves or recesses i are made through the nozzle I, the sharp outer
edges of which grooves serve, when the nozzle is screwed into the throat of the box,
to clear the female threads of the stuffing box of the fragments of packing which
_work into them....
Jis a split thimble entering the nozzle and serving to make and maintain a
proper working fit with the surface of the rod.
Fig. 9 is an elevation of a vertical steam engine fitted with our invention
throughout..:
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. The combination of eccentric strap and rigid prolongation thereof constituting
a lever handle with a link connection from the strap to the plunger rod of a steam-
engine feed-pump, substantially as and for the purpose described with reference to
the accompanying drawings.
•
W
2. The combination in the stuffing box of the feed-pump of a steam-enginė-
boiler, of the closing nozzle having grooves with sharp outer edges formed therein
and a split screwed thimble making up-between said nozzle and the plunger rod
working through the same, substantially as and for the purpose described with
reference to the accompanying drawings.
3. In a steam engine in which the eccentric strap of the boiler feed pump is
prolonged into a lever handle, the connection of said strap to the plunger rod of the
feed pump being by means of a link or links, fitting the stuffing boxes of said
engine with a closing nozzle having grooves with sharp outer edges formed therein
and a split screwed thimble making up between said nozzle and the rod working
through the same, substantially as and for the purpose described with-reference to
the accompanying drawings.