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Патент USA US2404183

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籎uly 16, 1946.
Filed Aug. '7, 1943
4 vsheets-sheet 1
July 16, 1946�
E? w., LANDMEn-:R
F11-'ea Aug. '7, 194:5
4 sheets-sheet 2
Edwin lk醓rza?mel鑢
July 16, 1946-
E. w. LANDMEn-:R
_Filed Aug. 7, 1945
4 sheets-sheet l;
July 15, 1945-
Filed Aug. 7, 1945
4 sheets-Sheet@
[dwirz M( 縜ndmezkr
Patented July 16, 1946
Edwin W. Landmeier, Erlanger, Ky., assigner to
The Wadsworth Electric Manufacturing Com- - '
pany, Covington, Ky., a corporation of Kentucky
Application August 7, 1943, Serial No. 497,835
6 Claims.
(o1. 20a-50)
2 "
The present invention relates to enclosed
lock between the fuse door and the switch ac
switches including the general class wherein the
tuator slide.
movable contacts are actuated by a pivoted or
Fig. 12 is a cross-sectional View taken on line
rotary member and has for an object the pro
vision of a simple sliding actuator operable from
the exterior of the cabinet for operating such an
enclosed switch.
A further object of the invention is to provide
an externally operated slide of the class referred
to which is adapted to provide for front-operated 10
|2-|2 ofFig.11.
Fig. 1:3' is a cross-sectional View taken on line
l3--I 3 of Fig. 12.
Fig. 14 is a cross-sectional View taken on line
|4--|4 of Fig. 12.
Fig. 15 is a fragmental plan view of the inside
of the cabinet door of Fig. l2.
switch cabinets as well as side-operated switch
cabinets, and which is well adapted to cabinets
Fig. 16 isa fragmental plan view showing a
cabinet in open position and embodying the> in
having an interlock between the switch actuator
vention, wherein the actuator slide is carried
and the cabinet door or the fuse compartment
by a bracket 駒ed in the cabinet.
15 `Fig. 17 is a cross-sectional view taken on line
door, or both of them.
`Still another object of the invention is to pro
I'l-Il of Fig. 16.
vide an arrangement of this character that is
Heretofore a large` variety of externally oper
easily and inexpensively adapted to meet the
ated enclosed switches has been known and each
varying requirements of the customer regarding
has entailed special cabinet construction to meet
the interlocking of the switch operation with the 20 the different customers requirements and to ac
switch enclosing cabinet.
commodate the selected rotary switch.
It is also an object to provide for any and all
By the present invention I have provided a
of the aforesaid features with a few inexpensive
simple means whereby the various kinds of
stamped metal parts and at the same time to
switches including those with rotary operated
eliminate to a large degree the necessity of 25 moving contact assemblies may be actuated by a
� special cabinet construction in meeting the re
simple- slide which will actuate any of the mov
quirements at hand.
? i
ing contact assemblies. The rotary type of mov
These and other objects are attained by the
ing contact mounting is by far the most com
-' means described herein and disclosed in the ac
monly used in the art so that the present in
companying drawings, in which:
30 vention has a very wide range of adaptability in
Fig. 1 is a plan view of an enclosed 'switch
embodying the invention, partly broken and
partly shown in dotted lines.
Fig. 2 is a cross-sectional view taken on line
Fig. 3 is a cross-sectional View taken on line
`3--3 of Fig. 1.
Fig. 4 is a perspective view of the actuator slide
formingadetail of the invention.
Fig. 5 is a fragmental cross-sectional view
showing the mode of adapting the'device ofthe
Ainvention to a side-operated switch box;
Fig. 6 is a plan View showing the?arrangement
of the actuator of the-invention with an inter
the art. One of the important advantages of the
invention is its easy and inexpensive adapta
bility in making front-operated enclosed switches
using ordinary simple cabinets and practically
35 any- make of switch of the commonly used type
as aforesaid. Front-operated switches are cap
able of closely ganged installation and are ex
tremely advantageous in places `-where space is
Reference is- now made lto Figs. l, 2, and 3,
wherein a switch box 20 of any desired construc
tion has a front opening door 2| hinged thereto.
The door is slotted longitudinally for a distance
near the latch side at 22"to` define the path and
lock on the fuse compartment door. '
45 the limits of movement of a suitable external
Fig. "I is a cross-sectional view?taken on> line
handle or knob 23, the shank member 24 of which
l--l of Fig. 6.
?extends through said slot 22 and is secured to an
Fig. 8 is a cross-sectional view taken on line
actuator slide plate 2-5 which is freely slidable on
? s-a of Fig. 6.
the inside face of door 2| between a pair of guide
Fig. 9 is a fragmental plan view of the inside 50 flanges 26 which are suitably iixed on the inside
of the cabinet door of Fig. 6.v
face of the door.
Fig. l0 is a perspective view of the actuator
For convenience of assembly the shank 24 may
slide of Fig. 6.
comprise a bushing 24| with a screw 21 counter
Fig. 11 is a plan view of a switch cabinet
sunk in the handle and passing through the bush
showing in dotted lines a modi馿d form of inter 55 ing, and threadedly engaged in a perforation 28
in the actuator slide 25. Rigidly fixed to the slide
25 is a depending member 29 having an aperture
or slot 30 which receives an angularly disposed
pin 3| of a crank arm 32 whereby the rotary
moving contact assembly of a switch 33 is oper
ated, The switch illustrated by way of example
is of the construction shown in my United States
Patent Number 2,255,669 oi September 9, 1941,'but
on the cabinet door to preclude opening of the
fuse door while the switch is closed Under these
conditions the cabinet door is customarily sealed
The switch 33 is secured within the box in any
suitable manner as, for example, by fastening
the switch base to the back wall by screws.
The crank bar 34 is suitably journalled for ro
tary motion in simple brackets 35 which, in this
The slide 259e has an extended rib 46 with a
slot lll to receive the pin 3i in crank arm 32 of
.the switch' 33 to operate the switch as the slide
is reciprocated by the handle 玦8 on the outer face
of _the slotted cover 49.
in any suitable manner so that the customer may
have access to the fuses but not to the remainder
of the interior of the cabinet.
This form of the invention involves no major
change of structure or function over the device
of Fig. 1 Ain the means for eiiecting operation of
the invention herein is not to be considered as
limited in any respects to the particular switch. 10 the switch from the face of the switch box door.
case, are secured to the back wall .of the box by
means of screws St. The crank arm 32 may be
The cabinet cover 49 has an opening 56 con
shown, is of the quick-break type, the spring 3l
which is connected to pin 3l being arranged, in
slide is in switch closing position thereby pre�
venting opening of the fuse door without first
moving the switch to an ?oli? position. A suitable
trolled .by a hingedly mounted fuse door 5I which
provides access to fuse compartment 52 within
removably applied to the crank bar by passing a
the box. This fuse door has on its inner face a
rectangular portion of the bar, intermediate the
journalled mountings, through a correspondingly 20 spaced away lug 53 forming a way into which a
flange 54 on rib 縤t of the slide enters when the
shaped aperture in the arm. The switch, as
known manner, to become tensioned during the
initial movement of the crank arm `32 to quickly '
complete the movement of the latter after it
passes over dead-center.
As will `-be well lunder
snap latch 55 having a ring -handle 5.5i on the
outside of fuse door 5i serves to hold the fuse
door closed and a resilient latch lug 5l fastened
.on the sidewall of the switch box and operating
stood by those versed in the art, any .suitable
:through a slo-t in the switch 4box >door 49 holds the
quick make and quick break mechanism may be
interposed between member il@ of the slide and 30 籰atter closed. Asecond interlock to prevent move
the crank arm
or if desired the Vcrank arm
ymay be completely >subject yto manual operation
. vnient of slide 25% from an ?off? position to an
?on? position when the fuse door is open is op
From the foregoing description it will be un..
tionally provided, by pivotally mounting an L
shaped latch member 53 on the inside face of
derstood that the :moving contacts 38?carried by
cover @il with an end extending across the >top
conditiondtis'of c_ourse'possible to again close the
switch in order to make Aroutine meter ltestsand
inspections. -A suitable door latch遧t is provided.
therein, controlled by a hinged fusedoor
through the slide.
of fuse door opening Eil, An _inclined faced lug
the arms 39 will assume the position ,shown in
ES on `the fuse .door 5i is so mounted that dur
Fig. 2 when the >slide 25 vis in the position shown
ing the i'inal closing movement of _door 5|, the
in full lines, and kthat vwhen said slide is moved
lug 5S engages the 籥rm ii@ of lr_-shaped latch
longitudinally vuntil the handle 23 assumes the
dotted line position shown, ysaid contacts will each 40 member 58 near the end of the arm and ,moves
said latch member 53 about its pivotal 籱ounting
complete an electrical circuit through a pair cf
縯o thereby withdraw the latch iinger end 6| from
contacts til-iii (see also Fig. l).
its vseat in a notch 62 in slide 25S@ against >the
.An interlock between the switch actuating
yielding pressure of a spring t3. The latch 58
mechanism and the door Sli `is inexpensively pro
vided bynxing an angle piece 62 4to the latch-side ^ 45 thus holds the slide 25d@ in its ?off? position
`while the fuse door is open but is automatically
wall-of the cabinet 20 so located that, whenslide
released by the act of closing the `fuse door. It
255 is in the upper or"?on? position, `an offset lug
-will also be remembered that the fuse door is
vor flange ,li-3 on the slide will assume a position
latched against opening when -the slide is 籭n the
directly beneath the projecting lug or flange 縤l
or? theangle piece Il? and thus preventopeningof 50 ?on? position.
In Figs. 11-15 there is vshown a modified form
door 2l until the slide >is moved to its opposite
of interlock controlled by the .front-operated
limit of movement and _the >switch has assumed an
switch actuator slide. yIn 籺his ?embodiment the
?off? position, (see Fig. l). -Once lthe door has
switch box cover E4 has a fuse ?door opening 65
been opened while the switch -is >in a safe (?off?)
In Fig. 5 the invention is shown adapted to a
side-operated switch actuator, the parts being
only slightly modified and reversed in their re
spective -mountings That `is to say the guide
flanges 25B are mounted von opposite sides of a
door has on its rear face a keeper?'l `located just
below the top edge to receive the lower edge B8
of a T-shaped bar @� which is pivotedat 'it _on the
switch' box cover. Bar � is biased蚥y spring 'il
to urge the edge S5 into keeper 忸'i. The actuator
slide .is reciprocable in the manner previously
described, and has its lower end 73 arranged to
.depress the adjacent top edge of bar Si) for rock
ing it onfitsfpivot and thus lifting theedge?遲 out
of keeper @l to permit.openingI ofithe fusedoor
by its latch and ring structure indicatedgenerally
le?. (See Figs. 1i and 15). The interlock be~
tween the actuator slide Y?i2 and thervfuse :door 65
comprises a latch member l5 pivoted, intermediate
>slot 22?! in the sidewall ZEG of the box and the
slide 255). reciprocable therein by a handle 23e,
has nxed thereto a member遡?� with spaced apart
lugs .2% and lll-lll. The lug 29B is slotted (like
member ?29 of Fig. 4) and receives the crank arm
328, The?lug 玦3-0 moves along the inner face of
the switch box door Zit when the latter is closed,
and assumes a position above vthe lug 440 on said 70 its ends on a pin or stud ,l'� andhavingnJ coil
spring '�'l surrounding fthe stud land suitably at
door when the slide 250 is in switch closing posi
tached'to the latch and cover respectively to bias
the latch for rotating movement on its pivot in
Reference is now made to Figs. r6-10 inclusive,
an anti-clockwise direction as viewed >inf�ig. l5.
which are illustrative of -one form ofthe inven
tion lwith van `interlock with -a `籸use -door mounted 75 Theupperipart of the latch >member is Inotched
at 'i8 to receive a lug 'i9 on actuator l2 when th'e
latter is moved to an ?off? position and the fuse
door 66 is opened. If the fuse door remains
lel with a wall or" the cabinet, said wall having
a rectilinear slot therein which is closed by said
slide at all times, a yoke 蚻xed on the slide and
closed, however, or is subsequently closedl an in
having a slot for engaging the rotary member
clined lug Si! on said fuse door` holds the latch 5 for rocking the same as the slide is moved, a
member ?i5 out or? engagement with said lug i9
handle stud rigidly mounted on the slide pro
so that the actuator may be reciprocated when
jecting through the slot
defining the limits
the fuse door is closed. The actuator slide 'l2
of movement of the slide at the oit an on posi
has an apertured or slotted member' or yoke 8l
tions of the switch.
to operate the selected rotary or pivote@ crank l0
3. An enclosed switch comprising a cabinet, a
arm of e, switch, for example, it may engage the
switch in the cabinet including a rockable op
crank pin 3! on a crank 32 of a switch 33 similar
lerating member, guides 駒ed interiorly of the
to those heretofore described and illustrated.
cabinet alongside said switch operating member,
In the modified structure exempliiied in Figs.
a slide having rectlinear movement in the guides,
i6 and 17 the actuator slide
is reciprocably 15 a yoke fixed on the slide for removably con
mounted in guides B3 which are secured to the
necting said operating member and said slide
bottom face of a slotted i?lange de of a bracket
whereby the operating member is rocked in op
E35. This bracket is rigidly secured to the side
posits directions by the slide, the cabinet having
wall 85 ci a switch cabinet 8'! so that the upper
face of ilange 84 is immediately beneath the in 20 a rectilinear slot closed by said slide and adapted
tol define the limits of movement of the slide,
side of the cabinet cover 3b when the latter is
and a handle stud nxed in the slide and extend
closed (see Fig. 17). The actuating handle or
ing through the slot for cooperation therewith in
knob E3 is fixed to the actuator slide in any ap
limiting the movement oi said slide.
proved manner, for example as h?ereinbefore de
ll. An enclosed switch comprising a cabinet
scribed, and operates in the slot 923 oi bracket M
having a rectilinear slot therein, a switch mount
at all times. The cover 83 has a slot ill with an
ed in the cabinet and including a rotatably
enlargement E2 at the lower end thereof, which
mounted member rockable about an axis between
end defines the ?oli? position limit of movement
imite for opening and closing said switch, a
of the actuator slide. The enlargement S2 is
slide reciprocably mounted over said Slot Within
capable of passing over the knob or handle Sii
when the slide is in the ?on? position. This " the cabinet adjacent said member, a crank pin
on said member, a yoke iixed to the slide and
permits opening and closing oi' the cabinet cover
loosely embracing the crank pin, and a man
when the switch is in the ?ofi? position. In all
ually operable stud fixed on the slide and extend
other positions 01"' the slide. the closed cabinet
cover is incapable of being opened. The slotted OI ing accessibly through the slot for cooperation
therewith in limiting manual reciprocation of
member or yoke 93 on the slide imparts rocking
the slide at the off and on positions of the
movement to the moving contact crank 32 by
engaging the pin or stud 3i thereof in the pre
5. An enclosed 'switch comprising a cabinet
viously described manner. In this embodiment,
as in all others the particular kind oi switch 40 having a door with a rectilinear slot adjacent
the latch side thereof, a rotary switch mounted
employed is entirely a matter of choice. The size
in the cabinet and having a rockable member
and shape oi the handle or knob for the slide
will be governed largely by the size of the switch
disposed wholly within the cabinet for operating
structure and by choice of design as in a,ll of
the switch, a crank pin in said member, a slide
reciprocably mounted on the inside face of the
door over the slot in the door, a handle stud ac
cessible from the outside of the door and 駒ed
the previously described embodiments and in ad
dition to this the enlargement 92 will of necessity
be of e, size and shape that will pass over the
selected knob or handle.
The term rotary switch as used herein includes
any switch structure having a moving contact
assembly which is actuated by a rotary or pivoted
What is claimed is:
l. In an enclosed externally operated switch
in the Slide through said slot and positively lim
iting the manual reciprocation of the slide at the
on? and on positions of the switch, a yoke 駒ed
50 on the slide and having an open ended slot for
receiving the crank pin therein during the clos
ing of the door when the switch is in ?ofi? posi~
tion, an offset lug on the slide, and a 馻nge mem
the combination of a switch cabinet including a 55 ber fixed to the cabinet and lying in a plane in
termediate the inside face of the cabinet door
movable door, a rotary switch mounted therein,
and thev offset lug, said flange being located in
an actuator slide member guidedly mounted on
a position such that it is superposed over the off
the door oi the switch cabinet, a yoke element
lug when the slide is moved to switch closing
having an open ended 'slot on one side of the
slide for removably engaging and operating the
6. In a front operated enclosed switch the
switch, and a handle piece fixed to and projecti
of a cabinet including a hinged
ing from the other side of the slide, said cabinet
door, a slide reciprocably mounted in a plane
door having a rectilinear slot defining the lim
parallel to and adjacent said door in its closed
its of movement of said slide member at the oi�
the door having a slot longitudinally of
and on positions of the switch and permitting
the slide, a handle slidable on the outer face of
disposition of the handle on the exterior of the
the door and 駒ed to the slide through the slot
box and said yoke in the interior of the box when
in the door, a rotary switch mounted in the cab
the door is closed.
inet and means on the slide and switch effect
2. An enclosed switch comprising a cabinet, a
ing actuation of the switch as the slide is recip
switch therein including a rotary member rock 70 rocated
by the exteriorly disposed handle.
able about an axis for actuating the switch, a
slide reciprocably mounted for movement paral
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