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Патент USA US2404940

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July 3o, 194C.
'
J. .=§ BEAL
2,404,940
CIRCUIT CONTROLLER
_Filed April 6, 1943
2 Sheets-Sheet l
INVENTOR
BY
'
a/XW
ATTORNEY
I
July 30, 1946.
_1_ F, BEAL
2,404,940
CIRCUIT CONTROLLER
Filed 'April e, 1945
wlTNEssEs;
2 sheets-sheet 2
'
INVENTQR
2,404,940
Patented July 30, 1946
UNITED STATES PATENT OFFICE
2,404,940
CIRCUIT CONTROLLER
James F. Beal, Renfrew, Ontario, Canada, as
signor to The Bryant Electric Company, Bridge
port, Conn., a corporation of Connecticut
Application April c, 1943, serial No. 481,985
27 Claims. (c1. 20o-_5)
1
2
This invention relates in general to electric
circuit controllers, and more specifically to re
become more apparent upon consideration of the
following description of a preferred embodiment
turn means for multi-position switches.
In multi-position switches such as the switch
shown in Charles H. Hodgkins, Patent N0.
thereof when taken in connection with the at
tached drawings, in which:
2,331,191, issued October 5, 1943, and assigned to
switch embodying this invention,
the same assignee as this application, wherein a
rotary switch operating handle is movable 360°
in either direction and is provided with a plurality
of operative positions and an "oiT’ position, a
great deal of effort may be required in adjusting
the switch, since it may Ibe necessary to rotate
the switch a full 180°. The effort required is
multiplied when a ,plurality of such switches are
provided, such as on an electric range for the
control of each heating unit thereof. Particu
larly in electric range applications", it has been
found that these switches are often left at an
Figure 1 is a central sectional View through a
Fig. 2 is an exploded perspective View of the
reset mechanism shown in Fig. 1,
.
Fig. 3 is a section taken substantially on the
line III-III of Fig. 1J
Fig. 4 is a view similar to Fig. 3 but showing
the position of the parts after rotation of the
switch handle substantially 300°,
Fig. 5 is a View also similar to Fig. 3, but illus
trates still another position of the reset mecha
msm,
Fig. 6 is a side elevation view of the reset mech
anism shown in Figs. 1 to 5 with a portion of the
“on” position, or if a hasty attempt is made to
switch casing cover shown in section,
turn them to "off” position, that they often are 20
Fig. '7 is a front view of the switch shown in
not completely turned to “off” position. This
Fig. l,
results in a personal hazard, causes waste of elec
Fig. 8 is a plan View showing the interior of the
trical power, and may cause burning and conse
switch casing with the cover and actuating cam
quent waste of food.
removed, and
Accordingly, one object of this invention is to 25
Fig. 9 is a view similar to Figs. 3 to 5 but illus
provide a switch of the type described with an
trating still another position of the reset mech
automatic means to effect return of the switch to
anism.
its “off" position.
Another object of this invention is to provide
`Referring to the drawings, the novel switch
reset mechanism is illustrated in connection with
for a switch which is movable in opposite direc
tions from an “off” vposition to a plurality of op
,
'
.30 a switch 2 similar to the switch shown in the
above-mentioned patent of C. H. Hodgkins. The
erative positions, novel means for automatically
switch shown on the drawings, like the Hodgkins
returning the switch to its “ofi” position after
switch, is provided with an open sided casing 4
adjustment to an operative position in either
of insulating material, preferably a molded in
direction.
.35 sulating material. The open side of casing 4 is
Another object of this invention is to provide ' provided with a cover plate 6 which may be re
for a switch which is rotatable 360° in either di
movably secured in position by screws 44. The
rection from an “off” position to a plurality of
switch casing is also lprovided with a plurality of
operative positions, novel means for resetting the
terminals 8, and mounted on the bottom wall of
switch to its “off” position by the same manual
the casing are a plurality of annularly arranged
operation irrespective of the direction or the
spaced contact segments I0. There may be two
number of degrees of rotation of the switch.
concentric rings cf contact segments I0, with the
One diiñculty in providing spring reset means
space between the segments of each ring occu
for switches having a plurality of operative posi
pied by segments II of insulating material. A
tions, is that these switches generally employ 45 single contact actuating means in the form of
some sort of spring indexing means to define
an actuating cam member I2 is rotatably
each position of the switch, and if a resetting
mounted by actuating shaft I 6 within the casing.
spring is employed which is strong enough to
As shown, the actuating shaft is provided with a
overcome the indexing means the force required
square section I'I adapted to be received in a simi
to manually adjust the switch becomes excessive. 50 larly shaped opening in actuating cam I2. The
Therefore, another object of this invention is
actuating cam carries a bridging contact I8 ern
to provide in spring reset means for a switch of
bedded in the undersurface thereof for bridging
the type described, means for releasing the switch
the two rings and connecting opposite contact
indexing means upon resetting so that the reset
segments lll. Actuating cam I2 may also have
spring need not be of excessive strength.
55 peripheral cam surfaces for actuating resilient
Another object of this invention is to provide a
switch arms such as i4, positioned at one or more
novel spring arrangement for indexing a multi
sides of the casing as in the Hodgkins switch.
position switch which also biases the contacts of
Each switch arm I4 has a portion adapted to move
the switch into engagement.
into and out of engagement with a stationary
These and other objects ofthis invention will 60 contact I5, and the switch arms, contacts and
2,404,940
o9
.-ontact segments are electrically connected with
».ppropriate terminals 8.
For a more complete
spring pressure on balls 22 so that they no longer
offer any opposition or indexing in response to ro
escription of the construction and operation of
switch of this type, reference is hereby made
to the above-mentioned patent of C. H. Hodgkins.
This switch differs from the Hodgkins switch
in that cover â is provided about the aperture
through which actuating shaft IB extends, with
a plurality of annularly spaced indented portions
tation of actuating shaft i6. The importance of
will cause rotation of actuating shaft i6 and cam
ture 80 as to be nonrotatively mounted with re
this feature will appear as the description pro
ceeds.
A substantially inverted cup-shaped casing ßû is
provided for the switch reset mechanism proper,
and this casing may have integral outwardly ex
tending supporting flanges 42 which may be se
2d. The portions 2i) are for the purpose of receiv iii cured to switch casing Il by the same screws fill
securing cover 6 in place. Mounted within cas
ing balls 22 supported by a ball supporting mem
ing 40 on actuating shaft Hl are the various ele
ber 25 extending transversely of the actuating
ments of the switch reset mechanism. These in
shaft. The actuating shaft l5 is provided with a
clude a supporting plate 4B having a circular
longitudinally extending slot 2li which may be
aperture therein so as to be freely rotatable rela
formed by a saw-cut or the like, and ball support
tive to actuating shaft I6. Supporting plate 46
Z5 extends through this slot, and is located in a
supports a latch 43, which has a top rearwardly
diametrically extending slot 25 provided in the
extending lug 59 adapted to be loosely received in
outer surface of actuating cam l2. The actuat
a notch 52 provided in extension 6d ol' supporting
ing cam is also provided with pockets aligned
with balls 22 for receiving coil compression springs "ZO plate @6. Latch ¿til is also provided with a lower
rearwardly extending lug 5d adapted to be loosely
28 engaged between the bottom of these pockets
received in notch 5f» provided in the central open
and ball support 25 to bias the support and balls
ing of supporting plate 45. Lugs 59 and
act to
22 towards cover 5, and at the saine time urge
loosely mount latch 48 for movement with sup
actuating cam l2 toward the bottom wall of cas
porting plate 46 about actuating shaft I6 as an
ing ¿i to bias bridging contact I8 into engagement
axis. Latch 48 is provided with a pair of side
with the Contact segments mounted on the bottom
latch arms 58 and $6 which extend outwardly at
wall of the casing.
each side thereof and are bent somewhat towards
An actuating handle 3€) is provided with an
cover plate 6. Latch lli) is also provided with a
aperture therethrough, preferably D-shaped in
section to receive the similarly shaped outer end 30 pair of spaced forwardly extending release arms
E6, 63, having reduced outer ends e6, 98, respec
of actuating shaft Iâ so as to be capable of rotat
tively, and an inclined edge 62 at the under side
ing the shaft upon rotation of handle 30. A re
of arms St and 68 adjacent reduced ends 95, S8.
lease bar 32 is formed integral with ball sup
A reset spring 12, in the form of a helical coiled
port 26 and extends from an intermediate por
spring is also mounted over actuating shaft I6,
tion of the latter, longitudinally through slot 24
and has the ends 1d, 716, thereof crossed and ex
in actuating shaft I6 and beyond the outer end
tending outwardly in spaced parallel relation to
thereof, The outer end of release bar 32 is pref
receive therebetween a forwardly extending
erably reduced in width, as shown at 34, for rotat
spring lug lll also integral with latch 43. As
ably receiving a push button 36 having a sleeve
clearly appears from Fig. 2, one end 1-’5 of spring
adapted to work in counterbore 33 provided in
'F2 is positioned at one side of spring lug li?, and
the outer end of actuating handle 3D. Push but
the other end 'i6 of the spring is positioned at
ton 35 may be retained on release bar 34 by a
the other side of spring lug lil.
split ring 35 adapted to be received in a groove
A second latch supporting member 'i3 is also
in push button 36.
From the structure thus far described, it will 45 mounted on actuating shaft Iii, and this support
is provided with a substantially D-shaped aper
be apparent that rotation of actuating handle 3E!
spect to the actuating shaft. A second latch 6d
is pivotally mounted on support i8, for example.
and cause actuation of cam operated switch mem 50 as by a pivot pin 82. Latch Bil is provided with
an upwardly and rearwardly extending spring
bers i4. Indentations 2E in cover 6 are located so
arm 83 also adapted to extend between ends “M
that balls 22 will enter diametrically opposed
and lli of spring 12, and sup-port ‘i8 may have the
indentations at each closed circuit position of
i 2, to cause bridging contact i3 to successively
bridge the various pairs of contact segments I0,
upper end thereof notched to form legs ISB corn
the switch as well as at the “off” position, shown
in Fig. 1. As shown in Fig. 7, this switch has six 55 prising stops for limiting relative pivotal move
ment of latch 8d by engagement with the re
positions equally spaced about the actuating shaft,
spondingly spaced about the actuating shaft.
duced rearwardly extending portion of spring arm
86. Latch 84 is provided with a pair of opposed
This positively indexes the switch so that in mov- .
latch arms Sii and 9%, and with a second pair of
so that six indentations 2i) are provided corre
ing from one position to the other, it is necessary
that the balls 22 be rolled out of indentations 253
against the bias of springs 23.
This requires
inwardly spaced opposed latch arms 92 and 911,
all for a purpose to be described.
Supporting member 'i8 has a pair of forwardly
extending side flanges IGZ for receiving there
between a slidable release plate llld provided with
switch positions. Moreover, as soon as an opera 65 an aperture Iälß for freely receiving actuating
shaft i6. A projection |08 is provided in aper
tive position or the “off” position of the switch
ture |06 so as to be in alignment with the slot
is approached, springs 28 will assist the operator
2d in the actuating shaft and release bar 32
in moving the switch, because balls> 22 will roll
therein. Release plate M14 is provided with a sub
into the next adjacent indentations to thereby
index the switch at the proper point in its path 70 stantially wedge shaped projection IIE] in align
ment with a V-shaped notch l i 2 in latch 34, and
of movement for defining an operative or closed
with rearwardly and upwardly extending release
circuit position. By moving push button 3B in
arms H4, H5, all for a purpose to be described.l
wardly toward operating handle 3i), ball support
As previously stated, the outer end of shaft l5
26 is moved to the right, as viewed in Fig. 1,
while compressing springs 28 to thereby relieve 75 is D-shaped in section. The inner end of shaft
greater force in initiating movement from a switch
position than is required in moving between
5
2,404,940
6
I 6 is full round in section, and at the point Where
button 36 is depressed. This moves release bar
these two shaft sections meet, a stop shoulder 61
32 to the right, as viewed in Fig. 1, destroying the
is formed. Stop shoulder 61 prevents movement
indexing of balls 22 as previously described, and
of support 18 inwardly toward switch cover plate 6.
at the same time cam surface II8 formed as one
With the switch in the “off” position shown in
side of a notch in the edge of the release bar op
Figs. 1 and 3, upon rotation of actuating handle
posite projection I 08 on release plate |04, engages
30 in either direction, spring 12. will be stressed,
projection E68 to move release plate towards latch
and the switch will be locked in the position to
84. This causes engagement of wedge shaped
which it is adjusted against return movement by
projection I I0 on the release plate with the sides
spring 12. Return of the switch to its “off” posi 10 of V-shaped opening I I2 in the latch, to rotate
tion is arranged to be effected by inward move
the latch :to a position wherein latch arm 90 is
ment of push button 36 and release bar 32. In
withdrawn from the casing aperture 69 with
order to explain the operation of th'e reset mech
which it has been engaged. Since inward move
anism, let is be assumed that it is desired to ro
ment of the release bar 32 has destroyed the in
tate actuating shaft I6 in a clockwise direction
deXing of balls 22, spring 'I2 will then be free
from the position shown in Figs. l and 3 toward
to restore the actuating shaft to the “off” posi
the position shown in Fig. 9. Upon the initiating
tion of the switch by the action of spring end 16
of such movement, latch 84 is also moved in a
on latch 84 and support plate 18. The engage
ment of wedge shaped projection i Il) in V-shaped
clockwise direction, because it is mounted on sup
port 18 which is nonrotatable relative to actuat 20 notch' II2 of latch 84 prevents rotation of latch
ing shaft I6. However, spring arm 86 of latch
84 about its pivot 82 during resetting movement
84 engages spring end 16 and carries it along
and thereby prevents either latch arm 88 or 98
with it. This tends to cause movement of spring
from engaging with any apertures 68.
end 14 in the same direction; however as soon as
In order to provide for movement of the switch
spring end 14 exerts a force on spring lug 10 to
actuating shaft in one direction an amount great
the right as viewed in Figs. 2 and 3, latch 48 is
tilted, as shown in Fig. 9, so that latch arm 58
engages cover plate 6. Switch cover plate 6 is
provided with a pair of spaced struck-out por
er than 360°, and also with a view to decreasing
the size and strength requirements of spring 12,
there is provided means for locking the two ends
of the spring together after actuating shaft I6
tions forming shoulders 63 and 65 adjacent latch 30 has been rotated an amount more than 180° from
arms 6U and 58, respectively, in the “off” position
the “off” position in either direction. In the em
of the switch parts. Consequently, as soon as
bodiment of the invention illustrated in the draw
latch arm 58 engages cover pla-te 6, its movement
ings, locking of the two ends of spring 12 occurs
in a clockwise direction will be halted by shoul
after substantially 308° of rotation of actuating
der 65.
shaft I8 in either direction. Assuming rotation
Accordingly, continued movement of actuating
of actuating shaft I6 in a clockwise direction 300°'
shaft; I6 in a clockwise direction will move spring
from the position shown in Fig. 3 by handle 38,
end 'I6 relative to spring end lI4, thus stressing
then the parts, assume the position shown in Fig.
the spring. Since latch 84 is pivotally mounted
4, wherein latch arm 94 of latch 84 engages the
at 82, spring end 16 engaging spring arm 86 of the
reduced end 88 of release arm 68 on latch 48. '
latch will cause rotation of the latch about pivot
This not only latches the two ends of the spring
82 in a counter-clockwise direction and cause
together, but also tilts latch 48 in a manner to
latch arm 90 to engage with the inner surface
remove arm 58 from shoulder 65, and also tilts
of the side wall of casing 48. This position of
latch 84 about its pivot 82 to remove latch arms
latch 84 is shown in Fig. 9 with the switch at a
88 and Se from engagement with the inner side
position intermediate its “simmer” and “low”
Wall of casing 48.
heat positions. As shown in Figs. l, 3, 4, 5 and 9,
As the position of the part shown in Fig. 4, the
the side wall of casing 48 is provided with a plu
switch may be moved by actuating handle 38 to
rality of apertures 65 spaced about the casing at
any other desired switch position, including “off”
points corresponding to the operative positions of fn) position, or the switch may be automatically reset
the switch. Accordingly, when the switch' has
by depressing push' button 36. If it is desired to
been advanced to the desired position, latch arm
move the switch by handle 30 to some other posi
90 will engage in the corresponding aperture 69
tion, the only resistance to movement will be that
in casing 48, so that when manual rotating effort
offered by indexing balls 22 and the pressure of
is removed, the switch will remain at the position
bridging contact i8 on contact segments Iâ and
to which it has been adjusted. It is obvious that
insulating segments IE. If it is desired to auto
at such a position of the switchl it may again be
matically reset the switch with the parts posi
manually operated to another position further
tion as shown in Fig. 4, depression of push but
from the “oñ” position, or to a, position closer to
the “oif” position or to “01T” position itself. If
manually operated to “off” position in a counter
ton 36 will again cause inward movement of re
lease bar 32 and movement of release plate |84
towards latch 84, all as before. However, this
clockwise directiony or to another switch position
which is toward the “oiî” position, rotating shaft
time release arm I i4 on release plate I 84 will en
gage inclined surface 62 of release arm 68 of latch'
I6 in a counter-clockwise direction, as viewed in
Fig. 9will cause clockwise rotation of latch 84 about
its Divot 82 and latch arm 98 will, accordingly,
immediately release from the casing aperture 69
with which it was engaged. However, it is not
necessary to manually restore the switch to “off”
position by manipulation of handle 38, because
this may be easily accomplished by merely de
pressing push button 36. Assuming that the
switch is at a position other than its “ofi” posi
tion and it is desired to utilize the reset mecha
nism to restore the switch to “off” position, push
65
48, to tilt latch 48 and release the end S8 of re
lease- arm 68 from latch arm 84 of latch 84.
Inward movement of release bar 32 destroys the
indexing function of balls 22 as previously de
scribed. With the ends of spring 12 unlocked,
spring end 16 is free to restore actuating shaft I6
to “o ” position by its engagement with latch 84.
As soon as latch 48 is released from latch arm 84,
spring end 14 will cause latch arm 58 on latch 48
to again engage shoulder 65 on cover plate 6 to
form a reaction point for this end of the spring.
Switch handle 39 may, if desired, be manually
2,404,940
7
moved to the “off” position from the position
shown in Fig, fi. The switch may then be left
with spring 'I2 in the stressed condition shown, or
push button 36 may be depressed to unlock the
two ends of the spring. In this case, rotation of
the shaft is not necessary as the switch is at the
“olf” position, and as a matter of fact the actuat
ing shaft will not be moved, because, although
inward movement of push button 355 destroys the
indexing effect of balls 22, rotation of the shaft
is still opposed by the friction between bridging
contact I8 on the one hand and contact segments
il) and insulating segments ll mounted on the
bottom wall of casing 4 on the other hand. Con
sequently, when the switch is manually moved
to “off” position from the position in Fig. 4, and.
push button 35 is depressed, latch member ¿i8
will be rotated in a clockwise direction because
there is substantially no opposition to movement
of this member, since it is mounted on support
ing plate ¿l5 and is free to rotate on shaft i6.
However, spring end ‘i4 causes the leading latch
arm 5S of latch #it to engage cover plate 6 and
this will engage shoulder 55 when the spring is
unwound and the two ends are brought together
upon opposite sides of spring lug 'I0 and spring
8
tion llû on latch release plate Ille to rock latch
84 to a position intermediate its positions wherein
latch arms 88 and Sii engage the inner surface of
the side wall of casing liti. Release of latch ßíi will
restore the switch to “off” position in a manner
similar to that described above.
From the foregoing it is apparent that this in
vention comprehends resetting means for
switches of the type which are rotatable in either
direction from an “off” position any desired
amount, which may be actuated by merely press
ing a release push button. The reset means is
effective to reset the switch to its “off” position
even though the switch is manually operated in
either direction an unlimited amount. The in
vention also permits manual return of the switch
to “off” position if desired, and in this case if the
automatic release is later actuated, the mech
anism will restore itself to its normal “off” pesi
tion without however disturbing the electric cir
cuit condition of the switch, Moreover, these
novel functions are obtained by the use of a re
setting spring which is maintained at a reason
able strength and size because actuation o-f the
resetting pushbutton destroys some of the resist
ance to movement of the switch actuating shaft,
and also because of the feature of locking the
arm 85 at the position of parts shown in Fig. 3.
ends of the spring together after predetermined
Instead of manually rotating the switch to
movement, so that additional movement, such as
“off” position from the position of parts shown
in
4l wherein the two ends of the spring are 30 rotation of a plurality of revolutions in the same
direction, does not act to further stress the spring.
locked together or instead of automatically re
As previously pointed out, a switch of this type
setting the switch by depression of push button
is especially useful in the control of electric
it may be desired to move the switch to some
ranges where at least 4 such switches are usually
other position by means of handle 3B. If this
is done, the parts may assume a position such as 35 provided for the various heating units of the
range. It obviously would be a very simple mat
shown in Fig, 5 which is a position substantially
ter to deenergize all the heating units of a range
90“ from the position shown in Fig. e. Here
again, the switch may be manually manipulated
equipped with switches of this type by merely
pressing the reset push buttons of the various
by handle 38 to any other position or to “off” switches. Furthermore, this positively insures
position as described above. Assuming, however,
the return of the switch to “off” position and does
that it is desired to reset the switch to “oiî” posi
not require accurate manual adjustment to in
tion from the position shown in Fig. 5, depres
sure deenergization of the heating units.
sion of push button (it will destroy the `indexing
Having described a preferred embodiment of
function of balls 22 and cause movement or re
lease plate IEM towards latch 84, as before. This, 45 the invention in accordance with the patent
statutes, it is desired that the invention be not
in turn, will release latch arm 94 from end 98
limited to this particular embodiment, inasmuch
of release arm E3 so that the spring will then be
as it will be obvious, particularly to persons
skilled in the art, that many changes and modifi
to move latch 8d back in a clockwise direction to 50 cations may be made therein without departing
from the broad scope of this invention. Accord
the position shown in Fig. 3, where it will engage
ingly, it is desired that the invention be inter
shoulder 65 and be halted. The remaining stress
preted as broadly as possible and that it be lim
in spring 'i2 is then forced to be dissipated by
ited only as required by the prior art.
spring end lt, and this will cause counterclock
I claim as my invention:
wise movement of latch 84, support 'i8 and ac 55
l. In a switch having a plurality oi contacts,
tuating shaft Iii in a countercloekwise direction
contacts actuating means movable in opposite di
from the position shown in Fig, 5 to the “olf”
recîions from an"‘oiî” position in which said con
position.
tacts are open, to a plurality of spaced operative
Although, in describing the operation of the
switch and spring reset means, it has been as 60 positions in each of which at least some of said
contacts are closed, indexing means operative to
sumed that the switch is rotated in a clockwise
frictionally maintain said actuating means at
direction from the “01T” position shown in Figs.
each position thereof, resilient means biasing said
l and 3, it will operate in the same manner if
actuating means to said "oif” position, latch
the switch is rotated in a counterclockwise direc
tion from its “ofi” position. This is due to latches 65 means automatically o-perable to maintain said
actuating means at any of said operative positions
d8 and 34 being formed in an identical manner at
to which it is adjusted, and means for simulta
opposite sides thereof, so that the only difference
neously releasing said latch means and indexing
in operation upon rotation of the switch in a
means to permit said resilient means to restore
counterclockwise direction from its “off” position
will be that the latch arm Bi! will engage shoul 70 the switch to “off” position.
2. In a switch, a plurality of spaced contacts,
der 63 on the cover plate to anchor spring end
cooperating contact means movable in one direc
16, and latch arm 88 on latch 84 will be biased
tion for successively engaging said spaced oon
to engage apertures 59 in the side wall of the
free to unwind.
Since the least resistance is
presented to spring end l’li, that end will first act
cover 4l). Latch 34 is released in the same man
ner by depressing push button 36 to cause projec
tacts at successive operative positions, respective
75 ly, indexing means deñning each of said opera
2,404,940
.9.
tive positions, said indexing means including re_
siliently biased means engageable with spaced
means at said positions, respectively, for increas
ing the resistance to movement of said movable
contact means, and said resiliently biased means
arranged to react on said movable contact means
to bias the latter into engagement with said con
tacts at least at each of said positions..
3. In a switch, a plurality of spaced contacts,
cooperating contact means movable in one direc
tion from an “oir” position for 'successively en
gaging said spaced contacts at successive oper
10
cause latching of said other latch member with
one of its stationary latchportions and posi
tioning of said one latch member for engage
ment with said annularly arranged latch por
tions to latch said actuating means at the oper
ative position to which it is adjusted with said
resilient means stressed an amount sufiicient to
return said actuating means to “oir” position,
and means for moving said one latch member to
10 a position at Which it is'out of engagement With
said annularly arranged latch portions thereby
permitting said resilient means Vto reset said
ative positions, respectively, indexing means de
switch to “oil” position.
„
iining each of said operative positions, said in.
7. In a switch having a plurality of contacts,
dexing means including resiliently biased means 15 contact actuating means rotatable any amount
engageable with spaced mean-s at said positions,
in either direction from an “off” position in
which said contacts are open to a plurality of
movement
respectively,of for
said increasingJr
movable contact
the resistance
means, said
spaced Voperative positions in each of which at
resiliently biased means arranged to react on
least some of said contacts are closed, means for
said movable contact means to bias the latter 20 returning said actuating means to “o ” position
into engagement with said contacts at least at
including a latch member movable With said ac
each of said position, resilient means biasing sai-:l
movable Contact means to said “oit” position,
latch means to maintain said movable contact
tuating means, annularly arranged spaced latch
portions positioned to cooperate with said latch
member at said operative positions, respectively,
means
means for
at each
simultaneously
of its operative
releasing
positions,
said latch 25 resilient means engaging said latch member so
as to be stressed upon movement thereof in either
means and the engagement of said resiliently
direction from “o ” position, means responsive
biased means with said spaced means to permit
to movement of said actuating means in either
said resilient means to return said movable con
direction from “ofi” position to position said latch
tact means to “off” position.
30 member for engagement with said annularly ar
4. In a switch having a plurality of contacts,
ranged latch portions to latch said actuating
contact actuating means movable in a recurrent
means at the operative position to Which it is
path in either direction any amount from an
adjusted with said resilient means stressed an
“off” position in Which said contacts are open,
amount suiiicient to return said actuating means
to a plurality of spaced operative positions in 35 to “olif” position„and means for moving said
each of which at least some of said contacts are
latch member to a position at which it is out of
closed, resilient means biasing said actuating
engagement with said annularly arranged latch
means to its “oiî” position from any of said
portions thereby permitting said resilient means
operative positions, latch means automatically
to reset said switch to “oiî” position.
operative at said operative positions to prevent 40 8. In a switch having a plurality of contacts,
return of said actuating means by said resilient
contact actuating means rotatable any amount
means, and means for releasing said latch
in either direction `from an “01T” position in
means.
'
5. In a switch having a plurality of contacts,
contact actuating means rotatable any amount
in either direction from an “off” position in
which said contacts are open, to a plurality of
spaced operative positions in each of which at
least some of said contacts are closed, resilient
means biasing said actuating means to its “oir”
position from any of said operative positions,
latch means automatically operative at said op
erative positions to prevent return of said ac
tuating means by said resilient means, and means
for releasing said latch means.
6. In a switch having a plurality of contacts,
contact actuating means rotatable any amount
in either direction from an “ofi” position in
which said contacts are open, to a plurality of
spaced operative positions in each of which at
which said contacts are open to a plurality of
spaced operative positions in each of which at
45 least some of said contacts are closed, means for
returning said actuating means to “off” position
including a latch member movable with said ac
tuating means and another latch member movable
relative to said actuating means, stationary latch
50 portions positioned to cooperate With said other
latch member substantially at “oil” position for
preventing movement Vthereof in either direc
tion, annularly arranged spaced latch portions
positioned to cooperate with said one latch mem
55 ber at said operative positions, respectively, re
silient means engaging said latch members so as
to be stressed by relative movement thereof,
means responsive to movement of said actuating
means in either direction from “off” position to
60 cause latching of said other latch member with
least some of said contacts are closed, means
one of its stationary latch portions and posi
for returning said actuating means to “oli” posi
tioning of said one latch member for engagement
tion including a latch member movable with said
with said annularly arranged latch portions to
actuating means and another latch member mov
latch said actuating means at the operative po
able relative to said actuating means, stationary 65 sition to Which it is adjusted with said resilient
latch portions positioned to cooperate with »said
means stressed an amount suflicient to return
other latch member substantially at “oir” posi
said actuating means to “off” position, means
tion for preventing movement thereof in either
responsive to at least 180° of movement of said
direction, annularly arranged spaced latch por
actuating means from said “01T” position to
tions positioned to cooperate Wtih saidone latch 70 latch said latch members together and move said
member at said operative positions, respectively,
resilient~means engaging said latch members so
as to be stressed by relative movement thereof.
means responsive to movement of said actuating
members to disengaged position relative to theirI
cooperating latch portions, and means `for re
leasing said latch members to permit saidv spring
to reset the switch.
means in either direction from “off” position to 75 . 9, VIn a switch having a plurality of contacts,
2,404,940
il
contact actuating means rotatable any amount
in either direction from an “off” position in which
erative positions in each of which at least some
of said contacts are closed, means for returning
said actuating means to “oil” position including
said contacts are open to a plurality of spaced
resilient means a portion of which is movable
operative positions in each of which at least some
of said contacts are closed, means for returning Ul with said actuating means, means holding an
other portion of said resilient means substantial
said actuating means to “o ” position including a
ly ñxed for at least 180° of rotation of said ac
latch member movable with said actuating means
tuating means from “oli” position, means for
and another latch member movable relative to
thereafter locking said two portions of said re
said actuating means, stationary latch portions
silient means together with said resilient means
positioned to cooperate with said other latch mem
in stressed condition, means for releasing said
ber substantially at “ofi” position for prevent
portions for retrograde movement, and means
ing movement thereof in either direction, an
nularly arranged spaced latch portions positioned
to cooperate with said one latch member at said
operative positions, respectively, resilient means
engaging said latch members so as to be stressed
preventing retrograde movement of said other
portion of said resilient means beyond said “off”
. position, whereby said oneportion of said resilient
means is eiîeotive to restore said actuating means
to “ci” position.
l". In a switch having a plurality of contacts,
to movement of said actuating means in either
contact actuating means rotatable any amount in
direction from “oiî” position to cause latching
of said other latch member with one of its sta 20’ either direction from an “off” position in which
said contacts are open, to a plurality of spaced
tionary latch portions and positioning of said one
operative positions in each of which at least some
latch member for engagement with said annular
of said contacts are closed, means for returning
ly arranged latch portions to latch said actuating
said actuating means to “off” position including
means at the operative position to which it is
by relative movement. thereof, means responsive
adjusted with said resilient means stressed an
amount sufficient to return said actuating means
to “oir” position, means responsive to at least
180° of movement of said actuating means to latch
said latch members together and move said mem
bers to disengaged positions relative to their co
operating latch portions, and means acting on
said one latch member to release the other latch
member and maintain said one latch member at
a position at which it is out of engagement with
said annularly arranged latch portio-ns thereby
resilient means a portion of which is movable
with said actuating means, means holding an
other portion of said resilient means substantially
fixed for at least 180° of rotation of said actuat
ing means from “oli” position, means for there
after locking said two portions of said resilient
means together with said resilient means in
stressed condition, means for latching said actu
ating means against retrograde movement at
least at each operative position up to said 180°
of rotation, means for releasing said latching
means and said portions for retrograde move
ment, and means preventing retrograde move
ment of said other portion of said resilient means
10. In a switch having a plurality of contacts,
beyond said “ofi” positiony whereby said one por
contact actuating means rotatable any amo-unt
in either direction from an “oiî” position in which 40 tion oi said resilient means is effective to restore
said actuating means to “off” position.
said contacts are open to a plurality of spaced
13. In a switch having a plurality of contacts,
operative positions in each of which at least some
contact actuating means movable in a recurrent
of said contacts are closed, means for returning
permitting said resilient means to reset said
switch to “off” position.
said actuating means to “ofi” position including
a latch member movable with said actuating
„ path in either direction any amount from an
` “off” position in which said contacts are open, to
means and another latch member movable rela
tive to said actuating means, stationary latch
a plurality of spaced operative portions in each
of which at least some of said contacts are closed,
tioned to cooperate with said one latch member
from any of said operative positions, latch means
indexing means defining each of said operative
portions positioned to cooperate with said other
positions by a change in the resistance to move
latch member substantially at “oiî” position for
preventing movement thereof in either direction, Jo" ment of said actuating means, resilient means
biasing said actuating means to its “off” position
annularly arranged spaced latch portions posi
at said operative positions, respectively, resilient
automatically operative at said operative posi
means engaging said latch members so as to be ., „ tions to prevent return of said actuating means
stressed by relative movement thereof, means re- „ ~- by said resilient means, and means for concur
sponsive to movement of said actuating means in
either direction from “off” position to cause latch
ing of said other latch member with one of its
stationary latch portions, means responsive to
tensioning of said resilient means to position said
one latch member for engagement with said an
nularly arranged latch portions to latch said ac
tuating means at the operative position to which
it is adjusted with said resilient means stressed
an amount suilicient to return said actuating
means to “off” position, and means for moving
said one latch member to a position at which it
is out of engagement with said annularly ar
ranged latch portions thereby permitting said rel»
silient means to reset said switch to “off” posi
tion.
11. In a switch having a plurality of contacts,
contact actuating means rotatable any amount
in either direction from an “oil” position in which
said contacts are open, to a plurality of spaced op
rently rendering said indexing means ineffective
and releasing said latch means.
14. In a switch having a plurality of contacts,
contact actuating means rotatable any amount
' in either direction from an “off” position in which
said contacts are open, to a plurality of spaced
operative positions in each of which at least some
of said contacts are closed, means for returning
said actuating means to “off” position including
a latch member movable with said actuating
means and another latch member movable rela
tive to said actuating means, stationary latch
portions positioned to cooperate with said other
latch member substantially at “ofi” position for
preventing movement thereof in either direction,
annularly arranged spaced latch portions msi
tioned to cooperate with said one latch member
at said operative positions, respectively, resilient
Y means engaging said latch members so as toA be
stressed >by relative movement thereof, means re'
2,404,940
13
14
sponsive to movement of said actuating means in
either direction from “off” position to cause latch
ing of said other latch member with one of its
stationary latch portions and positioning of said
to “olf” position, indexing means deñning each of
said operative positions by a change in the re
one latch member for engagement with said an
nularly arranged latch portions to latch said ac
tuating means at the operative position to which
it is adjusted with said resilient means stressed
an amount sufficient to return said actuating
means to “off” position, indexing means defining
each of said operative positions by a change in
the resistance to movement of said actuating
means, and means for concurrently rendering
said indexing means ineffective and moving said
one latch member to a position at which it is out
sistance to movement of said actuating means,
means responsive to at least 180° of movement of
said actuating means to latch said latch members
together and move said members to disengaged
positions relative to their cooperating latch por
tions, and means for concurrently rendering said
indexing means ineffective and releasing said
latch members to permit said spring to reset the
switch.
17. In a switch having a plurality of relatively
movable contacts, a rotatable contact actuating
shaft movable from an “off” position in which
said contacts are disengaged to a plurality of
of engagement with said annularly arranged
latch portions thereby permitting said resilient
operative positions in each of which certain of
some of said contacts are closed, means for re
spring to return said shaft to “off” position.
18. In a switch having a plurality of contacts,
said contacts are engaged, resilient means bias
ing said shaft to said “o ” position from each of
means to reset said switch to “off” position.
said operative positions, latch means for auto
15. In a switch having a plurality of contacts,
contact actuating means rotatable any amount 20 matically maintaining said shaft at each opera
tive position, and means movable longitudinally
in either direction from an “off” position in which
of said shaft substantially along the axis thereof
said contacts are open to a plurality of spaced
for releasing said latch means to permit said
operative positions in each of which at least
turning said actuating means to “off” position 25
contact actuating means rotatable any amount in
either direction from an “oif" position in which
said contacts are open to a plurality of spaced
operative positions in each of which at least some
resilient means engaging said latch member so 30 of said contacts are closed, resilient means bias
ing said actuating means to its “olf” position from
as to be stressed upon movement thereof in either
any of said operative positions, latch means auto
direction from “oif” position, means responsive
matically operative at said operative positions to
to movement of said actuating means in either
prevent return of said actuating means by said
direction from “off” position to position said latch
resilient means, and means movable longitudi
member for engagement with said annularly ar
nally of the axis of rotation of said actuating
ranged latch portions to latch said actuating
means and substantially along said axis for re
means at the operative position to which it is
leasing said latch meansadjusted with said resilient means stressed an
19. In a switch having a plurality of relatively
amount sufficient to return said actuating means
movable contacts, a rotatable contact actuating
to “o ” position, indexing means defining each of
shaft movable from an"‘off” position in which
said operative positions by a change in the re
said contacts are disengaged to a plurality of op
sistance to movement of said actuating means,
erative positions in each of which certain of said
and means for concurrently rendering said index
contacts are engaged, resilient means biasingsaid
ing means ineffective and moving said latch mem
shaft to said “off” position from each of said op
ber to a position at which it is out of engagement
erative positions, latch means for automatically
with said annularly arranged latch portions
maintaining said shaft at each operative posi
thereby permitting said resilient means to reset
tion, said shaft having a longitudinal passage,
said switch to “off” position.
and means slidable through said passage for re
16. In a switch having a plurality of contacts,
leasing said latch means to permit said spring
contact actuating means rotatable any amount ~
to return said shaft to “off” position.
in either direction from an “off” position in which
20. In a switch ‘having a plurality of rela
said contacts are open, to a plurality of spaced
tively movable contacts, a rotatable contact actu
operative positions in each of which at least some
ating shaft movable from an “off” position in
of said contacts are closed, means for returning
which said contacts are disengaged to a plurality
said actuating means to “off” position including a
' of operative positions in each of which certain of
latch member movable with said actuating means
said contacts are engaged, resilient means biasing
and another latch member movable relative to
said shaft to said "oif” position, latch means
said actuating means, stationary latch portions
for automatically maintaining said shaft at an
positioned to cooperate with said other latch
member substantially at “off” position for pre 60 operative position, said shaft having a longitu
dinal passage, means slidable through said pas
venting movement thereof in either direction, an
sage for releasing said latch means to permit
nularly arranged spaced latch portions positioned
said spring to return said shaft to “olf” posi
to cooperate with said one latch member at said
tion, an actuating handle having an aperture for
operative positions, respectively, resilient means
engaging said latch members so as to be stressed 65 drivingly receiving said shaft, and a push button
on said slidable means outwardly of said handle.
by relative movement thereof, means responsive
21. In a switch, a rotatable switch actuating
to movement of said actuating means in either
shaft, a plurality of spaced contacts arranged
direction from “off” position to cause latching of
about said shaft, movable contact means slid
said other latch member with one of its stationary
latch portions and positioning of said one latch 70 ably but non-rotatably carried by said shaft for
successively engaging said spaced contacts upon
member for engagement with said annularly ar
ranged latch portions to latch said actuating
rotation of said shaft in one direction, index
means at the operative position to which it is
ing means for said switch including a member
adjusted with said resilient means stressed an 75 arranged about said shaft and a cooperating
amount sufficient to return said actuating means
member associated with said movable contact
including a latch member movable with said ao
tuating means, annularly arranged spaced latch
portions positioned to cooperate with said latch
member at said operative positions, respectively,
arrogant
15
16
means, one of said members having annularly
arranged depressions and the other of said mem
bers including projection means adapted to be
received in a depression at each position of said
means to permit said resilient means to return
said shaft to “ci” position.
25. In a switch having a plurality of contacts,
bers toward the other with said bias exerted gen
erally longitudinally of said shaft so the reaction
thereof also biases said movable contact means
contact actuating means rotatable any amount
in either direction from an “off” position in which
said contacts are open, to a plurality of spaced
operative positions in each of which at least some
of said contacts are closed, means for returning
towards said spaced contacts.
said actuating means to “off” position including
switch, resilient means biasing one of said mem
22. In a switch, a rotatable switch actuating
shaft, a plurality of spaced contacts arranged
about Said shaft, movable contact means slidably
resilient means a portion of which is movable with
said actuating means, means holding another
portion of said resilient means substantially ñxed
for at least 180° of rotation of said actuating
but non-rotatably carried by said shaft for suc
cessively engaging said spaced contacts upon ro
tation of said shaft in one direction, indexing
locking said two portions of said resilient means
means for said switch including a member ar
together with said resilient means in stressed con
ranged about said shaft and a cooperating mem
ber associated with said movable contact means,
one of said members havinor annularly arranged
depressions and the other of said members in
dition, means for latching said actuating means
against retrograde movement at least at each op»
erative position up to said 180° of rotation, means
for releasing said latching means and said por»
tions for retrograde movement, means prevent
ing retrograde movement of said other portion of
said resilient means beyond said “off” position>
whereby said one portion of said resilient means
is effective to restore said actuating means to
“oif” position, and indexing means defining at
least the operative positions beyond said 180° of
rotation by a change in the resistance to move»
ment of said actuating means.
26. In a switch having a plurality of contacts,
contact actuating means rctataable any amount
in either direction from an “orf” position in which
said contacts are open, to a plurality 0f spaced
operative positions in each of which at least some
of said contacts are closed, means for returning
cluding projection means adapted to be received
in a depression at each position of said switch,
resilient means biasing one of said members to»
ward the other with said bias exerted generally
longitudinally of said shaft so the reaction thereof
also biases said movable contact means towards
said spaced contacts and manually operable
means for relieving at least one of said members
of said resilient bias to destroy indexing.
23. In a switch, a rotatable switch actuating
shaft, a plurality of spaced contacts arranged
about said shaft, movable contact means slid
ably but non-rotatably carried by said shaft for
successively engaging said spaced contacts upon
rotation of said shaft in one direction, indexing
means for said switch including a member ar
ranged about said shaft and a cooperating mem
ber associated with said movable contact means,
one of said members having annularly arranged
depressions and the other of said members in Lm
means from “off” position, means for thereafter
said actuating means to “off” position including
resilien+ means a portion of which is movable
with said actuating means, means holding an
other portion of said resilient means substantially
ñxed for at least 180° of rotation of said actuating
cluding projection means adapted to be received
means from “eff” position, means for thereafter
in a depression at each position of said shaft
locking said two portions of said resilient means
wherein said movable contact means engagesa
together with said resilient means in stressed
spaced contact and at an “orf” position, resilient
condition, 'means for latching said actuating
means biasing one of said members toward the 45 means against retrograde movement at least at
other with said bias exerted generally longitu
each operative position up to said 180° of rotation,
dinally of said Shaft so the reaction thereof also
indexing means defining at least the operative
biases said movable contact means towards said
positions beyond said 188° of rotation by a change
spaced contacts, second resilient means biasing
in the resistance to movement of said actuating
said shaft to “off” position, latch means for auto
means, means for concurrently releasing said inn
matically maintaining said switch at a closed
dexing means, said latching means and said por
circuit position to which it is adjusted, manually
tions for retrograde movement, and means pre~
operable means movable longitudinally of said
venting retrograde movement of said other por
shaft for relieving at least one of said members
tion of said resilient means beyond said “off”
of said resilient bias to destroy indexing, and 55 position, whereby said one portion of said resilient
said manually operable means having a cam sur
means is effective to restore said actuating means
face for concurrently releasing said latch means
to “olif” position.
to permit said second resilient means to restore
27. In a switch having a plurality of contacts,
the switch to its “off” position.
contact actuating means movable in a recurrent
24. In a switch having a plurality of relatively 60 path in either direction any amount from an “oli”
movable contacts, a rotatable contact actuating
position in which said contacts are open, to a plu
shaft movable from an “off” position in which
rality of spaced operative positions in each of
said contacts are disengaged to a plurality of op~
which at least some of said contacts are closed,
erative positions in each of which certain of said
resilient means adapted to he stressed in response
65
contacts are engaged, resilient means for return
to movement of said actuating means from said
ing said shaft when at each of said operative
“off” position to any of said operative positions
positions to said “off” position, latch means for
for returning said actuating means to said “off”
automatically maintaining said shaft at each 0p
position, latch means automatically operative at
erative position, an actuating handle having an
said operative positions to prevent return of said
aperture for drivingly receiving said shaft, and 70 actuating means by said resilient means, and
a push button slidably mounted on said shaft out
means for releasing said latch means.
wardly of said handle for releasing said latch
JAMES F'. BEAL.
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