IMPROVEMENTS IN STOP-COCKS
Year: 1884

page_text: I JOHANN ALBERT HENCKELS of Solingen in the German Empire, do hereby
declare the nature of the said invention for "IMPROVEMENTS IN STOP-COCKS," to be
as follows:-
These improvements have for object the construction of Stop-cocks. in such
manner as to allow of the passage through the same of precise quantities of gaseous
or liquid bodies for certain fixed positions of the cock plug, in addition to the full
shut or open position.
For this purpose a groove is formed over half the circumference of the cock plug
from one end of the plug orifice to the other end of the same, and in the cock
barrel is formed a groove corresponding thereto over one fourth of the inner
circumference, such groove commencing at a point at right angles to the inlet and
outlet orifices and proceeding in a gradually enlarged form to the outlet orifice.
The groove in the cock plug is however of the same dimensions for the whole of its
length. When the plug is fixed with its groove towards the outlet orifice the cock
is fully shut off; when fixed with its groove exactly extending between the inlet
and outlet orifices of the barrel the cock is fully open; when fixed with its
groove so as to communicate with the groove in the barrel it allows of the passage
of only the desired quantities of gas or liquid.

page_text: I, JOHANN ALBERT HENCKELS of Solingen, in the German Empire do hereby
declare the nature of the said invention for "IMPROVEMENTS IN STOP COCKS" and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
These improvements have for object the construction of Stop cocks in such
manner as to allow of the passage through the same of regulated and approximately
precise quantities of gaseous, or liquid bodies for certain fixed positions of the cock
'plug within the barrel.
The accompanying drawing illustrates the invention as applied to an ordinary
gas cock, through which for a certain fixed position of the cock plug only such a
quantity of gas can pass as may be necessary for obtaining a small flame..
For this purpose a small groove is formed over one half the circumference of the
plug a from one end of the plug orifice to the other end of the same, and in the
cock barrel b is formed a groove corresponding thereto, over one fourth of its inner
circumference in the direction of the outlet.
Figs. 1, 2 and 8 shew a stop cock of this invention respectively in the closed, the
full open, and the partly open positions. In Fig. 2 the grooves have such a
position that a full passage of the fluid through the cock is allowed. In the
position shewn in Fig. 3, if the aforesaid grooves were not provided the cock would
be shut off whilst by reason of the same the fluid (in this case illuminating gas)
passes through the groove in the plug a into the groove in the cock barrel b and
thus supplies to the flame just so much gas as may be required for a particular
purpose, and according as the cross section of the said grooves is larger or smaller,
so may a larger or smaller quantity of a gaseous or liquid body pass through the
cock, the action being such that upon a full turn to the right the cock is completely
shut off, and a full turn to the left a limited quantity of gas or liquid may pass
through which quantity is variable according to the depth of the grooves or their
cross sectional area. The quantity of the fluid passing through the cock may also
be regulated by means of the screw 8.
"It is obvious that this invention may be applied to cocks of all descriptions.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
In stop cocks the arrangement of a groove in the plug of the same in
combination with a groove formed in the cock barrel in such manner that upon a
full turn or travel of the cock plug in one direction, the cock is completely shut off
whilst upon a full turn or travel of the cock plug in the other direction, the cock
is only partially shut off; substantially as described and illustrated.