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Патент USA US2131717

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Sept. 27,‘ 1938.
Filed Aug. 13, 1934
Patented Sept. 27, 1938
Everett. Lens»
Island.- city,‘'.
GustaveAlNelsonand williamelt'hlioughlfidg'e" '
’ executors ' of. said. Edward __ A. ' Everett, deceased, H
assignorstojE. A.‘ Everett, Inc.-, Bong Island "
Qi-ty,"N\. Y.,_a corporation-of New *York
1' ‘ >
’“ “metastasis, 1934;. Serial 180,139,631
.._:‘2._.~C1a;n:1_s.~1 (oi-11154430).
This invention. relatessto: lightning arresters
and it hasioranobject to provide .an; arresteriof
the spark gap type in . which.the...elements; of; the
arrester. may be» assembled and‘ disassembled on
‘a. aninsulatedbase withoutrvarying the sparking
relation. of. these elements. .More. particularly,
ly-spaceg; lntpractice-itgisznot.possibleito mould
dowel pinsinto, porcelainvfer. this; purpose .a'ndzit ,
is thereforenecessary.totprovide an aperture in
the-porcelaingin whichjthe dowel ,pin is ‘accurately
positioned and; their secured; imposition in the ‘;5_
aperture by cement;0r-_Q17her.\means._ Each. part
the arrester. comprises a. base -;of lporcvelaimwhich
is moulded with apertures-to receive the attach-l
is comparatively loose on .the binding post-but ,is
provided-with at leasttwo dowels by whichit} is
ment of the. elements of. the arresterincluding
?rmly secured ,in- the positionidesired.
-_ _;-: .
m apertures in which dowel :pinsare accuratelysecured and by means of these dowel pins the-ele'e
ments.v of.the. arrester. ‘are-.inaintained accurately
vIn the drawing-,;_l.!;is..the porcelain base; jZgis r10
the-apertures-,_for~thebindingposts.opening from
the b9§tQmi1y.|§3lS_z thegbinding postgat. one; end for
in a predetermined sparking relation to each
other. The elements may be removed and re-'
15 placed, or replaced with other elements on the
dowel pins without materially changing the re-
securing discharge plate '4, and I6 iSthe binding '
post at the opposite end f0!‘ Securing discharge
plate l5 On top of the base. The intermediate 15
binding posts '7 Secure the discharge blocks '8
lation of the parts.
Other objects of the invention will appear from
the following speci?cation and the accompanying
20 drawing, in which:
Fig. 1 is a side elevation of the arrester, partly
Fig. 2 is a top plan view of the arrester;
Fig. 3 is a sectional elevation on line 3_3 of
25 Fig. 2;
Fig. 4 is a plan view of the underside of the
Fig. 5 is a template that may be used to space
the dowel pins;
Fig. Bis aside elevation of one of the discharge
Fig. 6a is a plan view of the underside of the
discharge block in Fig. 6;
to the base through the top plates 19.
The discharge blocks are centered in a row be
tween the discharge Plates '4 and I5 as Shown in
Fig. 2 and are‘spaced byan air gap at 20 above 20
the grove 2| formed in the ba?e- Longitudinal
grooves are alsoformed in the base at 24 and 25
below the Spark gap discharge points 21 0f the
plates l4 and it These plates have a deep notch
at 26 above the transverse grooves 2|. This is in 25
accordance with the construction of U. S. Patent
1,714,552, May 28, 1929.
The dowel pins 32 have a collar 33 and a stem
34 loosely mounted in the cavity 36 of the base
H and secured in position by the cement 35- 30
The pin 32 is smaller than the aperture 4|
through which it Projects to engage the ele
ments of the arrester. When applied to plates
Fig. 7 is a cross-section on anenlarged scale of ' l4 and I5 the dowel pins are threaded to re
35 the porcelain base with the dowel pin cemented in
place, and
ceive the screws 3| to hold'the plates in place. 35 I'
The binding post for the discharge block is placed
Fig. 8 is an alternative to Fig. '1 in which the
dowel pin is screwed into‘a metal plug in the
40 This arrester is of the multi-path type shown
in my Patent 1,988,650, of January 22, 1935 and
co-pending with the present application. It comprises a porcelain base upon which are mounted
a row of discharge blocks connected to the base
45 by binding posts and a discharge plate ‘on each
in the aperture 31 and the. adjoining apertures
38 are used for the dowel pins which are in
serted to register with the apertures 39 and 40,
Fig. 6 in the base of the discharge block. It 40
will be noted that the aperture in the base is '
shouldered or made in two stages and the collar
33 of the dowel. is larger in diameter than the
top opening but is smaller than the lower open
ing. The collar rests against the shoulder as 45'
side of said discharge blocks, said discharge plates
are also secured to the base by binding posts. It
the sealing material is poured into the large
opening and it prevents the sealing material
is important to be able to remove and replace the
from entering the small opening. _
discharge blocks and the discharge plates with50 out changing the discharge relation between these
The porcelain base is made in the usualmoulded form with apertures to receive the binding
posts. The base is also provided with dowel pins
55 by which the elements of the arrester are proper-
The plates l4 and I5 are drilled in a ?xture
to register with the dowel pins and the dis- 50
charge blocks are drilled at 39 and 40 to reg
ister with the dowel pins. These blocks may
be made‘ from a variety of materials such, for
instance, as is disclosed in U. S. ‘Patent 1,818,184,
of August 11, 1931. Where the material can 55_
be accurately moulded the holes 39 and 40 may
porcelain having shouldered apertures therein
be formed in the mould.
The dowel pins may be positioned by a tem—
plate 55, Fig. 5, which is provided with an aper
ture 31' to receive the binding post and has the
with a dowel pin in each aperture, said pins
being of smaller diameter than said apertures
and each having a collar engaging the shoulder
of the aperture, said pins located in a prede
holes 5|, 52, 53 and 54 properlyspaced torre
ceive and position ‘the dowel 'pinsjiwhileirthey
termined ?xed,relationwtg.eachother and ce
mentedlin position in saidapertures', a discharge
are cemented in the'bas‘e. The'holés 5|, '52," are block mounted on'a pair o'f‘s'aid dowel ‘pins and
for the discharge plates l4 and I5 and the holes _,a,plate mounted on another pair of said pins
in‘ sparking relation to said block and means for 10
In the construction shown in Fig. Bith‘eapere _;c,onnecting a conductor to said block and a con
53 and 54 are for one of the discharge blocks.‘ '
ture 36 is provided with a. metal plug 44 which
may be screwed or moulded in place. Thisplu'g is
drilled by a template fonthestem‘ .43 of the
15 dowel 32 which is screwed. into,v the plug and
seats on the collar 42.
as in Fig. 7.
This secure'sjth'e same
ductor to said plate. 7
2. A‘lightning arrester comprising a base of
porcelain'having shouldered apertures therein
and with’ the larger opening of each aperture 15
extending to the base, dowel pins having a collar
placed in said apertures, the pins being smaller
It is common practice -to ‘provide dowel pins
in diameter than the apertures and the collar
in moulded materials like Bakelite whichxhave
20 comparatively little shrinkage and where‘ ‘the
metal ‘dowels vcan be moulded’intb the stock.
This practice is not possible with porcelain which
shrinks unevenly and which’ would fracture if a
being larger in diameter than the upper aperture
metal‘ dowel were moulded into the-lstock.‘ The
25 use of porcelain'for-a lightning a'rrest’erv base is
highlydesirable and the only way to make? it
practical for present‘ purposes is ‘to locate the
dowels loosely in apertures in the porcelainand
then secure themin place through plugs which
30 are ?xedly located in the apertures} '
~ -'-'
’Havirlg thus described my invention, '1 claim:
1. A lightning arrester comprising a base of
and smaller in diameter than the lower aperture, 20'
said ‘dowel pins-‘being located in’a predeter
mined, ?xedrelation to each otherand secured
in :position when so ‘located by cement applied
to the' largerOpening of -.the base, a discharge
block engaging a plurality of said pins to accu 25
rately positionsaid block on said base, a‘dis
charge plate: engaging a plu'ralityof said pins
tosecure the plate in sparking relation to said
block, means for securing a conductor to said
block and means .‘for securing a conductor to said 30
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