IMPROVEMENTS IN AUTOMATIC FEED APPARATUS FOR STEAM BOILERS
Year: 1883

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PROVISIONAL SPECIFICATION left by Carl Franz Trinks at the Office of
the Commissioners of Patents on the 30th January 1883.
CARL FRANZ TRINKS of Helmstedt, Brunswick in the Empire of Germany
IMPROVEMENTS IN AUTOMATIC FEED APPARATUS FOR STEAM BOILERS
"
The Invention has for its object improvements in automatic feed apparatus for
steam boilers in order to keep the water therein always as near as possible at a
given level.
For this purpose the boiler steam is caused to pass as suddenly as required
through the feeding apparatus to a pump, injector or other water supply and the
steam is as suddenly cut off again.
The apparatus consists as represented in the accompanying drawings of a float,
lever, valve and peculiar connections and is placed inside the boiler and operates
in the following manuer.
When the water in the boiler falls to the low level, the valve is opened and the
boiler steam passes to the water feeding apparatus by means of a pipe in the man-
hole door or cover and puts the same automatically in action. The rising water
in the boiler raises the ball or float a which has attached thereto two guide rods a¹
(one on each side) and an operating rod a² in the middle, this rod a' has fixed
thereto a tappet a³ which as the float rises soon comes in contact with a cranked
lever b. This cranked lever b is fixed to a short sleeve or tube b¹ and turns
at first alone without operating the other mechanism until a weight b² attached
to the crank lever bhas passed the vertical line and on account of its own
weight rapidly falls. By this means a stud c' on the disc or lever c (Figures 1
and 2) is acted upon by the crank lever b and the shaft & which is firmly con-
nected to the disc or lever c by a key is compelled to partake in the rotary
motion thereby causing a stud e² on a boss e fixed to the shaft d to press
against the tappet f¹ on the rod f and thereby closes the valve g.
Then when through evaporation the water level again falls, the float a will fall
by its own weight which latter is so calculated that after having been in contact
with the tappet a³ on the operating guide rod a the back movement of the
crank lever b and operating rod f are brought into action by the weight of such
float and the instant opening of the value g is performed in a similar manner to

page_text: the closing. The spiral spring f° placed between the valve rod gland the guide
rod is to prevent a shock in the closing of the valve g.
The valve g may be of any suitable description but that shown in the drawings
and known as the Daelen valve is that which I prefer.
Two buffers are employed which limit the turning of the crank lever b in both
directions and a metal cylinder is also employed for the purpose of protecting the
float a against the ebullition of the water but for clearness these have not been
shown in the drawing.
To use the apparatus above described in connection with non sucking injectors
the mechanism represented in Figure 3 is inserted between the said apparatus and
the injector.
If it is desired to use the above described apparatus for a series of boilers with
only one water supply apparatus such as an injector or pump then the delivery
pipe from the main water pipe is provided with a mechanism of the character shown
in Figure 4.
Both of the two last mentioned mechanisms are connected with a steam pipe
from the new apparatus to the water supply apparatus by a separate branch tube
and the mechanisms Figures 3 and 4 are consequently thrown in and out of action
at the same time as the feeding apparatus.
In Figures 3 and 4 the movement is represented in the position when the
valve of my improved apparatus is open and both pistons h are pressed forward
through the steam pressure. This has the effect in the case of apparatus shown
at Figure 3 of operating the lever ¼ of the feed apparatus and in the case of the
apparatus shown at Figure 4, the piston is caused to open or to cut off the
passage through the feed pipe l.
After the steam has been cut off, the pistons h are pressed back by means of
springs i. or by weights and are thereby closed.
By the aid of my Invention water of any temperature can be fed to the boiler
: