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Патент USA US2117940

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May‘ 17, 1938.
2,1 17,940
FiledJan. 50', 1937
TI Jl‘I'. Iil}!
- _
Patented May 17, 1938
John S. Carpenter, Orange, .Massq assignor to
Rodney Hunt Machine Company, Orange,
Mass, a corporation of Massachusetts “
Application January 30, 1937, Serial No. 123,269
2 Claims.
(01. 253-422)
' This invention relates toawicket gate for water
against the next wicket gate they will form a
wheel casings.
The principal objects of the invention are to
provide a wicket gate capable of sealing the joint
against the next gate and prevent serious leakage
at that point; to eliminate the difficulty of adjusting the individual wicket gates tight against
leakage, after installation; to provide a compound
?exible wicket gate having an appreciable amount
of spring so as to insure tightness of the joints
Without adjustment; to secure better e?iciency
due to the leakage of less water past the wicket
gate, and to improve the conditions of manufacture and assembly so as to reduce cost.
Other objects and advantages of the invention
will appear hereinafter.
Reference is to be had to the accompanying
drawing, in which
Fig. 1 is a plan of a turbine water wheel casing
illustrating a preferred embodiment of this invention and showing the wicket gate pins in section, and
tight joint without adjustment, as indicated in
dotted lines in Fig. 1.
The gate pin supports the wicket gate through
a pair of bushings I3 at the top and bottom and
the cast iron part of the wicket gate is hollow,
being held together by an integral cast tie I4.
Of course, the wicket gate is provided with a link
hole I?) for receiving a pin on the operating link
it according to the usual principle.
This composite ?exible wicket gate has an ap
preciable spring temper so that the joints all
around the casing are closed with great tightness.
The yielding part is carried by and forms a part
of the wicket gate itself. This also provides a 15
rather higher degree of e?iciency due to the more
favorable passage of the water and is manufac
tured and assembled less expensively and yet more
e?iciently than has been the case heretofore. No
adjustments have to be provided because, if they 20
are not all exactly alike. the results are Substan
tially the same, except that perhaps some of the
Fig. 2 is an elevation of the same.
It has been customary to provide pivoted wicket
~35 gates around the casing, each of which comes into
contact with the next one to close or control the
openings between successive ones for the passage
of water. This is the only joint or seal. There
has always been serious leakage at these joints
30 in spite of various different types of adjusting
means. Furthermore, it is'di?icult to adjust each
wicket gate tight against leakage, especially after
For the purpose of overcoming these difficulties
35 the wicket gates Ill usually formed of cast iron
and pivoted on gate pins II, are not made all
in one piece but are provided with a plate l2 set
into the cast iron wicket gate and formed. of
steel, bronze, or other material. The plate I2 is
13,4) formed with perforations l'l. It is set into a
mold and the metal poured to cast the rest of
the wicket gate In. The metal flows through the
holes ‘I’! and when it solidi?es, leaves integral
rivets to hold the plate solidly. The plates have
45 a degree of resiliency, so that when pressed
joints are made under less pressure than others.
Having ‘B11115 described my invention and the
advantages thereof, I do not wish to be limited 25
to the details herein disclosed, otherwise than as
set forth in the claims, but What I Claim is:
1. As an article of manufacture, a Wicket gate
comprising a body of cast metal, a gate pin on'
which the said body is pivoted, and a central 30
tongue of Spring metal Projecting beyond the
end of the gate proper and COIlStituting an Opel‘
ating end of the wicket gate, for the purpose de
2. In a turbine water Wheel, the combination 35
of two circular series of gate pins, a cast iron
Wicket gate pivoted On One Of each Pair Of pins,
a metal spring plate cast into each wicket gate
and projecting in the general direction of the
Wicket gate from the free end thereof and adapted 40
to engage the next wicket gate with yielding
pressure in one position of the plate, and means
connected with each of the pins of the other pair
for swinging the gate.
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