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Патент USA US2101214

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Filed Feb. l5, 1937
Patented Dec. 7, 1,937V
Terry Everett, Watertown, N. Y., assignor to The
New York Air Brake Company, a corporation
of New Jersey ,
Application February 15, 1937, Serial No. 125,864
1 Claim. (Cl. 303-1)
This invention relates to wasp excluders and
particularly to excluders ofthe general type de
scribed and claimed in the patent to Campbell,
No. 2,046,058, June 30, 1936.
According to that patent six radial non-inter
secting slots are used.
There is an important
advantage in avoiding intersection of the slots
because the structure is stronger, and the large
aperture caused by intersection is avoided. How
10 ever, three diametric intersecting Vslots can be
sawn more quickly and economically.
quently in commercial practice certain features
of the patent to Taylor No. 2,040,451, have been
used, i. e., three intersecting diametric cross slots
15 have been sawn and a cylindrical pin has been
cated at 6 and has an exhaust port 'I pipe
threaded at its end. Into this threaded end is.
screwed the pipe-threaded base 8 of the excluder,
the parts being so dimensioned that when the
retainer is screwed home the smooth, flattened
extension 0 is whollyyvithin the threaded end of
the port. It is shown slightly countersunk, may
be flush, but should not project as it might then
be sealed by ice or sleet.
Formed in the threaded end of the base is a 10
bore II leading to an annular channel I2 which
extends slightly beyond the end of the threads
on base-8 and leaves a central hub or boss I3.
Three diametric slots I4 are sawn through the
extension 0. These run substantially to the 15
pressed into the intersection to blind the same threads on the base, the important thing being
that they cut across the full width of the channel
and stiiïen the structure.
I2 on both sides of' hub I3 but do not completely
Slight variations in width or location of the
slots greatly affect the size of the opening at the sever such hub.
In practice it is satisfactory if the slots I4 are
2 intersection, so that a close fit of the pins is dif
g1g” wide and the channel I2 is 5/64” wide. The
ñcult to secure economically. The present inven
tion avoids the need for the pin and produces unslotted portion of the hub may be gli" thick or
an excluder which has the practical advantages more, depending on the stiffening effect desired.
of the Campbell device, and yet may be economi -In any case the hub serves to blind the rather
large opening produced by intersection of the
25 cally manufactured.
Generally stated, an annular channel is cut cross slots.
Consider Fig. 3. There are two cross slots I4
from the base (threaded end) far enough to reach
the pathof the cross-slotting saw. The tool which intersecting at 90° and a third having a common
cuts the channel leaves a central hub beyond the intersection'to the ñrst two and bisecting the
angle between. This arrangement gives four
3 path of the saw. Then the other end is cross
small and two large intervening sectors, the latter
slotted, the slots communicating with therannu
lar channel. The hub blinds the relatively large Ybeing large and hence strong enough to receive
Y opening at the intersection of the slots and stiiî
ens the sector shaped portions between slots.
The invention in its preferred embodiment will
now be described by reference to the accom
1 panying drawing, in which,--
Fig. l is a fragmentary elevation of va retainer
valve, partly broken away to show'the improved
40 wasp excluder in position in the exhaust port.
The parts are shown in this ligure (as presented
inthe original drawing) twice actual size (magni
fied 2 diameters).
Fig. 2 is an elevation of the excluder on a still
45 more enlarged scale.
Fig. 3 is an end elevation thereof.
Fig. 4 is a perspective view of the device in axial
section the section being taken through one slot.
Fig. 5 is a perspective view with a portion of
50 the threaded base broken away.
In Fig. 1, the retainer valve is generally indi
the screw-driver slot I5 by means of which the
excluder is screwed to position. Since the wasp
cannot get into the slot I4 or past hub I3, it is 35
immaterial whether she can enter or otherwise
fill the opening olîered by the intersection of the
slots. Should she do so the restriction would not
exceed that oiîered by the pin in the present
commercial excluder.
A wasp excluder of the type comprising in one
piece an attaching base and an extension having
intersecting cross slots, in which the cross slots
communicate with an annular bore leading from 45
the end of said base, said bore surrounding a
central hub integral with said base and exten
sion, said hub serving to blank the intersection
of the cross slots and to stiiîen the slotted ex
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