Improvements in Double Acting Injector Apparatus.
Year: 1891

page_text: Date of Application, 14th Jan., 1891
Complete Specification Left, 1st Oct., 1891-Accepted, 14th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Double Acting Injector Apparatus.
I, HEINRICH ATHANASIUS BOLZE, of No. 15 Nicolaistrasse, Hanover,
Germany, do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved double acting injector apparatus wherein
the valves that control the two injectors are actuated by means of the spindle of
the starting cock. For this purpose the spindle of the starting cock, which is at
the bottom of the apparatus, is carried up. centrally between the two injectors and
is provided at its upper end with a vertically sliding crosshead which is acted upon
by an incline, cam, screw or other suitable device fixed on the cock spindle so that
by the partial rotation of the latter, the crosshead will be raised or lowered. The
ends of the crosshead take into slots or notches in the stems of the two valves that
close the steam nozzles of the injectors, the one end of the crosshead being made to
fit the slot of the one valve stem while the other end has a certain amount of
vertical play in the slot of the other stem, so that by the partial rotation of the
cock spindle the first named valve will first be raised off its seat, and then the
second one.
On the opening of the first valve, the steam jet propels the liquid,
entering through a lateral branch, through the first injector, and the liquid escapes
through the escape passage of the starting cock; on the further rotation of the
latter the valve of the second injector is opened and, simultaneously the escape
passage of the cock from the first injector is closed, whereupon the liquid propelled
by the first injector finds its way through a lateral passage to the inlet of the
second injector, the steam jet of which gives it an additional impetus. The starting
cock has a second escape opening which, when it is turned into the last named
position temporarily establishes a communication between the second injector and
the escape passage of the cock, thus allowing the full impetus of the liquid to be
attained, whereupon, by a slight further rotation of the cock, such passage is
closed, and the propelled liquid finds its way through a lateral passage of the
second injector to the boiler or other receptacle into which the liquid is to be
forced.
Instead of the above described central spindle that actuates the injector valves
being made to form an extension of the starting cock spindle, it may be a separate
spindle, so arranged that when rotated it actuates the starting cock and the two
injector valves in the manner described.
Dated this 14th day of January 1891.
ABEL & IMKAI,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Double Acting Injector Apparatus.
I, HEINRICH ATHANASIUS BOLZE, of No. 15 Nicolaistrasse, Hanover,
Germany, 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 an improved double acting injector apparatus wherein
the steam valves that control the two injectors are actuated by means of the
spindle of the starting cock passing through the casing between the two injectors
in such manner that by the rotation of such spindle it is made to act upon devices
Price Adl

page_text: interposed between it and the valve spindles so as to cause first the one valve to be
opened and then, by continued rotation, the other valve.
I will proceed to describe the said construction with reference to the
accompanying drawings in which Fig. 1 shews vertical section through both
injectors, Fig. 2 a section on linear, Fig. 3 a section on line y y, while Figs. 4, 5
and 6 shew the several positions of the starting cock relatively to the positions of
the valves. The starting cock a is arranged below the two injectors and its
It carries a disc fixed thereon
spindle 6 passes centrally between the two.
having an inclined cam or screw surface 62 which acts against a crosshead c, by
preference in a groove therein with corresponding inclined surface. The cross-
head c takes with the left hand part e¹ into a slot of the valve spindle d', and with
the right hand part c³, with a certain amount of play at top, into a slot in the
valve spindle el, as shewn at Figs. 1 and 4.
In these positions the valves of the injector apparatus are closed. On turning
the cock out of the position Fig. 4 into the position Fig. 5, the disc b¹ in acting
upon the crosshead c will first cause this to open the valve d so as to put the
injector apparatus A into action, which draws in the liquid and discharges it
through the cock passages a¹ a³ into the open air. On the further rotation of the
cock spindle the cock passage a¹ will be closed, thereby cutting off the injector A
from the cock while at the same time, the cock passage a' and valve e are opened,
thereby bringing the injector B into action.
The injector A simultaneously propels the liquid with a certain pressure through
opening in the direction of arrow I towards the injector B. On the further
rotation of the cock from the position Fig. 5 to the position Fig. 6, the valves de
will be fully opened and the cock passages a¹ a³ a³ are closed, whereupon the liquid
will be propelled by the injector B with increased pressure through the openings g
in the direction of the arrow II into the boiler supply pipe h, which is provided
with a check valve. The crosshead c might also be formed with a female screw
thread so as to be raised or lowered by a corresponding screw thread on the cock
spindle, as at Fig. 7.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A double acting injector apparatus in which the steam valves de and the
starting cock a are all actuated by one and the same spindle situated between the
two injectors, substantially as described.
2. In a double acting injector, the combination with the steam valve de and
starting cock a of a spindle b carrying a disc or equivalent device which act
upon a crosshead c geared with the steam valve spindles in such manner as to caus
the valves to open one after the other, substantially as described.
Dated this 30th day of September 1891.
ABEL & IMRAI,
Agents for the Applicant.