IMPROVEMENTS IN SLUICE VALVES
Year: 1885

page_text: COMILLIE
DIECIFICATION,
I, GEORGE FRANK POTTLE, of Medford in the County of Middlesex and State of
Massachusetts, one of the United States of America, Mechanical Engineer, do
hereby declare the nature of my invention for "IMPROVEMENTS IN SLUICE
VALVES," & in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
My invention relates to that class of clear-way valves in which the valve is
pressed upon the seat by a toggle lever, the object being to so construct the valve
and all its parts that no small joints, pins or pivots are necessary, all of the parts
being made with large bearings which are formed without the aid of pivots
or screws. These objects I attain by mechanism shown in the accompanying
drawings, in which, Figure 1, is a vertical section of my invention, Figures 2, 3
and 4 are elevations in detail. Figure 5 is a part section taken on line X Y,
Figure 1, looking towards the valve seat. Figure 6 is a section taken on the
same line, that is X Y, of Figure 1, looking to the right. Figure 7 is a perspective
view showing the construction of the toggle and its bail, and Figure 8 is a section
taken on line Z Z of Figure 6 to show the position of the side lugs on the cam A
and the slots in the toggle M, M.
In the drawings, A represents the case of the valve into which is screwed a
nipple B, Figure 1, the inner face B¹ B¹ of which forms the valve seat. C, is a
screw having a hand wheel C¹ which serves to move the valve up and down C* is
a collar attached to the screw C for the purpose of preventing it from moving
longitudinally, C³ is a screw quill which serves to hold the coller C in place and
C is a piece which together with the quill C³ completes the stuffing box (see
Figure 1). The valve D, Figures 1, 3 and 5 consists of a flat disk which forms the
valve proper and the boss D¹ which serves as a nut for the screw C to work in and
by which the valve is raised and lowered. The valve D has upon its back rib
pieces H H see Figures 1, 3 and 5 and shoulders KK Figures 3 and 5, one of
which shoulders is indicated by dotted lines at K, Figure 1. These shoulders K K,
Figure 3, are made concave so as to fit the ends L, L, of the toggles M, M., see
Figures 1, 2, 4, 7 and 8 the opposite ends K¹ K' of the toggles are adapted to fit
recesses R¹ formed on the interior of the valve case A, one of which is shown at
R¹, Figure 1, and both at R₁ R¹, Figure 6. The toggles M, M are connected by a
bail N, as shown in Figures 2, 4 and 6, this bale N is curved so as to surround the
upper side of the clear way of the valve and has on its center a boss P,
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page_text: The toggle and bail do not move up with the valve, but always remain at rest
in the recesses R¹ their only movement being an oscillating movement in which the
ends L, L, move slightly upward and the bail N, drops over in the direction of the
arrow at S, Figure 1. This takes place when the valve is raised.
R, Figures 1 and 6, is a projection cast on the interior of the case A, and serves
to prevent the toggles M, and their bail N, from getting out of place, that is, if the
valve was turned bottom side up or sidewise there would be no danger of the
toggles getting out of place.
In each of the toggles M, a groove T is made, see Figures 4, 6, 7 and 8 which
engage with projecting lugs T T shown at Figures 6 and 8 and indicated by
dotted lines at T₁, Figure 1. These lugs T¹ T¹ resting in the grooves T T in the
toggles M, M, serve in connection with the boss R, to prevent the toggles and bail
from getting out of place. V, Figures 1 and 3 is a guard piece located on the back
of the valve as shown. This piece as the valve rises holds the bail N back and
prevents it from falling in under the boss D¹ of the valve, when the valve is
drawn up.
To put my toggle piece M M, N, P, in place, I proceed as follows:-Before
putting in the valve seat piece B B¹ B¹ and before inserting the screw C, I slip the
valve D up into the upper part of the valve chamber A¹, Figure 1, and close
against the left hand wall, then I insert the toggle piece first in the position
indicated by the dotted line in Figure 6 then I swing it around as indicated by the
full lines in Figure 6 so that the lugs T¹ T¹ engage with the slots T and the boss P,
on the bail N, comes under the projection R which serves as a stop for the bail N.
Now the screw C is inserted and all the parts are locked together.
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 a clear way valve the combination of the valve D having a guard piece V and
shoulders K K with the toggle piece M M, N, P, and the case A having a projection R,
lugs TT and shoulders R¹ R¹, all operating together substantially as described
and before set forth.