close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3087351

код для вставки
April 30, 1963
H. w. HULTS
3,087,341
ELECTRIC SWITCHES
Original Filed July 18, 1958
uvmvron
HAROLD-W. HULTS
BY
7mm
ATTORNEY‘:
3,087,341
United States Patent 0
Patented Apr. 30, 1963
2
1
tered and supported in the bushing by a sleeve 7124. A
downwardly racing shoulder v126 is formed at the top
3,087,341
of the inside surface of the bushing for retaining sealing
ELECTRHI SWITCHES
Harold W. Halts, Milwaukee, Wis, assignor t0 Cutler
member 122, spherical portion 66 of lever 52 ‘and sleeve
Hammer, Inc, Milwaukee, Wis, a corporation of Dela
124 inserted ‘from the bottom of the bushing in that order.
Edge 128 of the shoulder and edge 130 of the sleeve bear
against spherical portion 66 of the lever and serve to
ware
Original application July 18, 1958, Ser. No. 749,357. Di
vided and this application July 29, 1959, Ser. No.
830,225
5 Claims. (61. 74—18.1)
properly position the lever in the bushing without unduly
resisting movement ‘of the lever in the bushing. Sealing
10 member 122 is of substantially ring-shape having an in‘
This invention relates to improvements in electric
switches, and although not limited thereto, the invention
side surface which tapers to ‘a nose 132. Sealing engage
ment is established :between nose 132 and spherical por
tion 66 -by making the diameter of spherical portion 66
slightly greater than the inside diameter of sealing mem
switch mechanism is sealed in a suitable casing against 15 ber 122 (FIG. 3), and by compressing the sealing mem
relates more particularly to improvements in miniature
switches of the toggle lever operated type wherein the
the entry of moisture and dust.
This application is a division of Harold W. Hults’ co
pending application Serial No. 749,357, ?led July 18,
ber slightly between shoulder 126 and the end of sleeve
124.
The axial position of sleeve 124 in the bushing for
properly supporting lever 52 and compressing sealing
member 122 is established and maintained by a tongue
1958.
An object of the invention is to provide improved seal 20 134 held between a shoulder 136 formed in the bottom
end of the bushing and the top of housing 46.
ing means for electric switches.
Although a speci?c embodiment of the present inven
A more speci?c object of the invention is to provide
tion has been illustrated and described, it will be apparent
improved sealing means for toggle lever actuator open
to those skilled in the art that various changes and modi
ings in switch casings which are long lived, low cost,
25 ?cations may be made therein without departing from
readily assembled and highly effective.
the spirit of the invention or from the scope of the ap
A still more speci?c object of the invention is to pro
pended claims.
vide improved sealing and seal retaining means for ac
I claim:
tuator openings in electric switches of the type having a
1. In a toggle switch having a hollow switch casing
bushing opening for pivotally supporting the actuator of
30 provided with a hole therein, a hollow supporting bush
the toggle lever type.
ing secured at one end to said casing around said hole,
The sealing means includes a substantially ring-shaped
an oscillatable operating lever having a handle portion
sealing member compressed into sealing engagement with
extending outwardly through said bushing and an oper
the lever by a shoulder formed at one end of the bushing
ating portion extending through said hole into said cas
and a sleeve inserted and fastened in the other end of the
35 ing and an intermediate enlarged substantially spherical
bushing.
portion within said ‘bushing, the improvement corn
Other objects and advantages will ‘be pointed out in,
prising;
or be apparent ‘from the speci?cation and claims, as will
(a) ‘an annular shoulder formed integrally within the
obvious modi?cations of the embodiment of the invention
outer end of said bushing and having a sharp‘ circu
shown in the drawings, in which:
lar edge in engagement with and forming a seat for
FIG. 1 is a fragmentary sectional view showing a
one side of said spherical port-ion;
sealing ‘means for the toggle lever;
FIG. 2 is a horizontal sectional view taken along line
2-—2 of FIG. 1; and
FIG. 3 is a vertical sectional view of the sealing mem
ber shown in FIGS. 1 and 2 showing the relationship be 45
tween the internal diameter of the member and the di
ameter of the spherical portion of the toggle lever prior
to assembly of the two parts.
Referring to FIG. 1, an operating toggle lever 52 for
the switch is mounted in a threaded bushing 120‘ having 50
an axial opening 56 therethrough and a ?ange 58 at the
lower ‘end thereof fastened to the top of housing 46 by
welding or ‘other suitable means. A sealing member 60
seated in a groove in the top of ?ange 58 provides a water
tight seal when the switch is mounted in a suitable panel 55
(not shown.)
Operating toggle lever 52, consists of a somewhat en
(b) a sleeve inserted in said bushing on the other side
of said ball portion and having a sharp circular edge
in engagement with and forming 1a seat for the other
side of said spherical portion;
(0) and a resilient seal-ing member ‘between said shoul
der and said sleeve, said sealing member having the
con?guration of a ring and having a dimension par
allel to its major axis substantially greater than its
radial dimension whereby said sealing member can
be compressed between said shoulder and said sleeve
to seal the space between the inner wall of said
bushing and said spherical portion while said sharp
edges of said shoulder and said sleeve remain a
su?icient distance apart to ‘con?ne said spherical
portion of said operating lever for pivoting there
between.
2. The invention de?ned in claim 1, wherein said
resilient sealing member is provided with a substantially
axial opening 56 or" bushing 12%; an operating handle
portion 63 formed integrally with and extending upwardly 60 rectangular cross-section with the inner wall thereof
larged, generally spherical portion 66 disposed within
tapered in opposite directions to a?ord greater radial
thickness at the center for compressive engagement with
bushing; and an integral shank portion 70 which tapers
said spherical portion of said lever thereby to provide a
downwardly from spherical portion 66 through an open
better seal with less frictional drag counteracting move
ing 72 in the housing to a generally spherical portion 74
at the end of the lever. A reciprocal sliding motion is 65 ment of the lever.
3. The invention de?ned in claim 2, wherein the inner
imparted to actuator block 50‘ by lever 52 by virtue of
diameter of said sealing member is smaller than the
the engagement ‘of spherical portion 74 at the end of the
diameter of said spherical portion of said lever.
lever with a cylindrical recess 76 in the top \face of the
4. The invention de?ned in claim 1, wherein the inner
block.
An arrangement for sealing lever 52 in a bushing 120 70 surface of said sleeve is frusto~conical in shape and
diverges from said sharp circular edge thereof to provide
is shown in FIGS. 1, 2 and 3 wherein an elastic sealing
space for said operating portion when said lever is pivoted.
member 122. and the operating lever are effectively cen
from spherical portion 66 and outwardly beyond the
3,087,341
4
3
2,400,849
2,633,510
2,686,851
2,726,105
2,744,984
2,756,775
2,759,075
2,830,619
5. The ‘invention de?ned in claim 1, together with
an external ?ange formed integrally around said sleeve
adjacent the end thereof opposite to the end having said
sharp circular edge, and said ?ange being clamped be
tween said casing and said bushing to rigidly retain said
sleeve within said bushing.
References Cited in the ?le of this patent
2,861,156
UNITED STATES PATENTS
10
1946
Schellman 14-17-14"? Mar- 3.1. 1953
Sunda _____ __, _______ __ Aug. 17, 1954
Koenig _____________ __ Dec. 6, 1955
Hults _______________ __ May 8, 1956
Hyde _______________ __ July 31, 1956
Hults ____ -2 ________ __ Aug. 14, 1956
Hollander __________ __ Apr. 15, 1958
Kulka ______________ __ Nov. 18, 1958
Stearns _____________ __ May 21,
FOREIGN PATENTS
1,949,451
Brulatour ____________ __ Mar. 6, 1934
2,010,367
Lapsley ____________ ____ Aug. 6, 1935
9,744
2,220,120
Plumrner ____________ __ Nov. 5, 1940
of 1904
' Great Britain ________ __ Mar. 9,
1905
Документ
Категория
Без категории
Просмотров
0
Размер файла
241 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа