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Патент USA US2133160

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Oct. 11, 1938.
T. w. BARLOW
2,133,160
SAFETY ELECTRIC CONTROL CONTAQTOR I
:Filed Jan‘. 13, 1938
TAeoa/ore
BY
2 Sheets-Sheet 1
Bar/enq- K
A
Pmnaa 0a.\ 11, was
"
2,l33,l_60 I
UNITED STATES" PATENT‘ OFFICE
QONTACTOB
_
Theodore W. Barlow, Detroit, Mich.
I
Application January 13, 1938, Serial No. 184,883
12 Claims. (OI. zoo-4.4)
tactors.
‘
a contactor in which the improved means re
ferred to in the preceding paragraph is a ro
V
In various ones of the arts electric contactors
are employed by which an operator or a plu
tary drum ‘having a plurality of different posi
s rality of operators control the supply of power
to a machine, power press, process, etc. Such
tions in which the said changes to one or more of 5
the said‘ conditions of the contactor may be ef
fected in an ‘improved manner.
Another object is to provide an improved con
contactors in'general are well known and are
sometimes of the push button type.
.
In some cases it is desirable to prevent the
10 unauthorized use of sucha contactor and to put,
tactor which may be converted from one con
dition to .another as described above, and locked w
it wholly out of use even against the wishes'of
against unauthorized changes thereof in an im- ’
the operator, for example to prevent the acci
dental operation of a machine while it is being
worked upon.
'
proved manner.
'
' necessary the use of the contactor or a plurality
‘ of like contactors, for example to insure that
of operators are at the contactors and therefore
Another object is to provide an improved con- »
20 out of danger of injury bythe machine during
'
'
In other cases it is desirable to insure that
such a contactor will remain permanently oper
ated so that an operator therefor may optionally
'25 be dispensed with.
-
'
It is also often desirable to prevent'the un
authorized tampering with or adjustment of such
contactcrs.
I '
The present invention accomplishes the above
30 described ends in a single structure. A contactor
is provided having a handle or push button by
which it may be operated; but may optionally
be set to remain operated, or optionally set to
remain inoperable independently of movement
35 of the handle or push button- _
Preferably but not necessarilyrthe contactor
parts are enclosed within a casing or housing
having a door or cover provided with a lock and
key, the handle or push button being external to
40 the casing; and access to the contactor within
the casing, as well as the setting of the contactor
so that it may be operated, or so that it will re
main inoperable, or so that it will remain oper
ated, are underthe control of .the lock and key.
45 ‘ The primary object therefore of this invention
is to provide a contactor by‘ which any one of, or
combination of, the above described functions
and conditions of a contactor may be accom—
plished;
'
‘
enclosing tamper-proof housing.
the hands of av machine operator ,or a plurality
'
'
Another object is to provide a contactor hav
ing means for converting it from one condition
to another as described above and having locking 1‘
means for locking it against unauthorized change,
and locking means also looking shut a contactor
ll - In other cases it is desirable to insure or make
the operation thereof.
I
Another object of the invention is to provide
This invention relates to electric control con
'
tactor which may be operatedto open or to close 20
an electric circuit by the turning of a lock by a'
'key, the contactor remaining locked in open or
closed condition upon removal of the key.
Another objectis to provide an improved con
tactor controlling two electric circuits and nor- 25
mally maintaining one circuit closed, and vthe
other open, and which may be operated to open
the closed circuit and close the open circuit, and
having means for optionally closing both circuits
and maintaining them closed.
30
Other objects will be apparent to those skilled
in the art to which my invention appertains.
' My invention is fully disclosed in the followinz
description taken in connection with the accom
panying drawings, in which:
,
my invention;
'
V
Fig: 2 is a fragmentary front elevational view
taken in the direction of the arrow 2 of Fig. 1;
Fig. 3 is a longitudinal sectional view of the 40
embodiment of .Fig. 1 taken approximately from
the plane 3 of Fig. 1;
Fig. 4 is a view of the underside of a cover ele
ment and parts associatedtherewith of the em
bodiment of Figs. 1 and 3, the views‘being taken 45
approximately from the plane 4-4-4 of Fig. 3;
Fig‘. 5 is a top plan view of the embodiment
of Figs. 1 and 3 with the said cover element of
Fig. 4 removed and with the wall of a housing ele
5o‘ . Another object 13m provide a contactor hav» ment thereof shown in section; _ '
Fig. 6 is a fragmentary sectional view taken
ing improved means bi which it may be converted
into an'operable contaotonor a permanently op
from the plane H of Fig. 3, and the view may
erated contactor, or a permanently inoperable also be considered as taken from the plane 6-4
" contactor, the object contemplating the effecting of Fla. 5;
'
IQ of such conditions singlyior in combination.
35
Fig. 1 is a top plan view of an embodiment of
50
m. '1 is'a fragmentary view of a part of m. u
2
.
v
j
9,183,160
3 with operative parts thereof indifferent posi
apart.
taken from the plane 1-1 of Fig. 8;
Fig. 8 is a fragmentary view'similar to part ofv
-
,
,
' Fig. 9 isa fragmentary view similar to Fig.1
‘ with the operative parts thereof in still another.
10 position :
Fig. 10 is a fragmentary sectional view takenv
from‘the plane ill-Ill of Fig. 3.' .
‘Fig. 11 is-a view of an operative part shown
in Fig. 5, but illustrating‘a modi?cation thereof
15 and illustrating in more detail a‘ lock device
which I may employ.
,
.
e
a
I
_
ears l1-l1 on the plate i3 have notches 21-21, "
Referring to the drawings, I have shown at I a
housing in- the form of an upwardly fopen box,
and at 2 a cover for the box and forming, in as
20
I
The support 2! has a pair of depending hooks
26-26 the lower ends of which are bent inwardly
under the actuator i9 in forward portions there
of, so that the movement apart of the actuator
l9 and the support 2| is limited and stopped by
the hooks 26. By this means they are free to
hingingly move toward each other by the yield
ing of the spring 23, or may hingingly move in 10,
unison; with the actuator I9 in engagement with
the hooks 26-26, for purposes to be described.
Means is provided tolock the cover 2 on the
box I, under control of the look even if the screws
I3-i2 have been removed. To this- end the 15
" Fig. 5, with operative parts thereof in different
_ positions and in the same position as the parts
'
_
per side of the actuator l9 tendingto move them‘ _
tions and the view may also be considered as
of Fig. 7 ;
_
formed therein under an inwardly
?ange 28 on the rearward end wall of the box I; ,
and, the ears i1-l1 being secured to the plate [3
and the plate being secured to the cover 2, the 20
The cover 2 may. be secured to the box I by rear end portion of the cover cannot be raised to
screws 2-2 in a well known manner, the screws remove it from the box without ?rst giving it a
beingprojected through perforations 4-4 in the forward movement, toward the left, as viewed in
cover and threaded into suitable corner bosses in ‘ Fig. 3. 0n the forward end portion of the actuator
the upper portion of the box I, not completely I8 is a depending hook 28 having a generally 25
sociation therewith, 'a substantially closed housing.
shown to avoid complication in the drawings.
A rotary barrel 5, which performs a number-‘of
functions to be described, is mounted trans
versely of the box l'adjacent to one end thereof. '
One end of the barrel 5 rotates upon a trunnion
6 securedupon the adjacent side wall of the box
i and the opposite end of the barrel is supported
~ upon and eonnected‘to a rotary element 1 of a lock .
8 mounted upon the side wall of the box I .at a
point opposite the trunnion 6. To turn the
barrel 5, a key 92 must be inserted in a keyhole
vertical portion 32 ‘disposed adjacent to a ?ange
2! on the box and the engagement of the hook por
tion 20 with the ?ange 3| will stop forward mo
tion of the‘ cover before it has moved su?iciently
to remove the'notches 21-21 from ‘under the
?ange 28 referred to, so that before the cover 2
can be removed the forward end portion thereof
must be raised su?ioently to-permit the hook 28‘
to be moved forward over the top of the ?ange
3 I, and it follows that if the forward portion of the
cover be held downwardly the hook 29 cannot be
*8 of the lock 8 to turn the lock part 1 and the key so raised and the cover cannot be removed. To
thus constitutes the only means by which the , thus prevent the‘forward end of the cover from
barrel 5 maybe rotated, the barrel .Ijbeing "being raised, a hook 22, integral with the plate ‘
' locked by the lock against rotation when the ‘key is '
l2, Figs. 3, 4 and. 6, depends therefrom, the lower
40
withdrawn. It is believed unnecessary to illus ' end of the hook 32 hooking under-a ?ange 33 on
trate the inner part of such a lock, the same being the end of the barrel ‘5 adjacent its bearing trun
well known. The‘barrel may be secured to the nion 6.v
.
lock part 1 in any suitable manner, one means _ In order at will to remove the cover 2 to give 80- '
being a spring l0, Figs. 5 and 6, which holds the cess to parts to be described within the box I, the 45
barrel toward-the-lock and maintains a sleeve ll key must be inserted in the lock and the lock
of the barrel in telescopic relation with the lock
part 1, as at l2,>the sleeve and lock part being
formed ‘so as to be non-rotatable relatively.
- The cover 2 has secured'on 'its'under side a
50 plate
It having a large opening I‘ in the central
part thereof. The plate It is riveted by rivets
turned, turning the bar'rel.5 through 180° from v
the operative- position illustrated. This will ro
tate a recess 24 in the ?ange 33 until it comes op
posite the'hook 22,~ and then the forward end of 50
- the cover 2 may be raised, the hook passing up
wardly through the recess 34 and when the hook '
Ii-li to the under side of the cover 2 and a _22, above referred ‘ to, has thereby been raised
'
- diaphragm it of ?exible material such as leather '
sufficiently to ride over the ?ange ii of the box,
is disposed between the plate It and the cover 2, the cover may be moved forwardly to remove the
before it is riveted thereto, so that when the cover notches 21-21 from under the" ?ange 28, and
2 is secured upon the box I by the screws, 2-2 as then the cover may be removed.
7
described, the diaphragm will seal all of the parts - Thus one of the functions of the lock 8 and the
within the box and under the diaphragm.
barrel 5 is to lock the'cover on the box to pre
The plate I! has depending therefrom laterally ' vent unauthorized removal thereof and tampering
spaced ears l1-l1, through aligned perforations, withthe parts within the box to be described, in 60
in which a transverse bearing pin II is disposed. cluding the barrel itself.
A sheet metal contactor-actuatorv II is mounted
Secured to the upper side of the support 2| is
to hingingly move on the pin ll. 118M118 ,815 8 '_ the cylindrical stem 35, a push button 36, the stem
rearward portion thereof {ears 20-22 bent up
projecting inwardly through the cover 2 through
wardly therefrom and provided with aligned per a relatively large perforation 31 therein, the push .
forations through which the vpin II is projected. button 26 being of large diameter, suitable to be
A push button support 2i is also 'hingingly operated to push it downwardlypy a blow or by
mounted upon the pin II, the support 2|v being pressure from the hand- or palm‘of the operator.
70 disposed above the pin it and having depending ‘The stem 35 clamps the diaphragm' it between it 70
_ ears 22-22 thereon through aligned perforations
in which the pin II is projected. ‘A. spring 22 is
and the support 2 _| and may have a portion of re
duced diameter 28 projected through perforations
wound around the pin it and one end 24 thereof ' inthe diaphragm and in the support and riveted
engages the underside of the push button support‘ over on the underside of the support. By this ar
1s. 2| and thev other end 25 thereof engages ‘the up I rangement
the diaphragm prevents the entrance 75
3
; ofdust or foreign
I
I
s,1ss,1eo4
, , Circuit wires-11, n, n, u are shown' con
tion 31 tothepartsilnderthediaphragm.
-nected to theterminal nuts respectively, 61, 38,
theWhen.
support
the push
2| counter-clockwise
button I. is depressed
as viewed.
it‘ rocks
in '
"and".
‘
r
I
'
- As will now be apparent, a circuit connected
Fig. 3, andifatthattime, inamannertobede-_. toIthe wires ‘II and 30 will normally be closed‘
scribed, the actuator is tree to move, the support
through the engaged contacts II and ‘II and ‘ill
2| and actuator I. move downwardly in unison. ' and"; ‘and when the push button ity is de-v
5If; however, for reasons to-be described the ,actu-j ., pressed, depressing the actuator II, it will act
ator i9 1 isgprevented" from‘ moving downwardly ‘through
roller 41 and oscillate the carrier 43- '
move downwardly against ' counter-clockwise, as viewed in Fig. 3, and dis 1,0
10 the supporti'2l
the tension of the'sp'ring 23 as described without " engage the said contacts opening the said circuit
transmitting the blovFor ,pressure- which‘ may , and by engaging the contacts "-43 and 4244
have been given to the pushbutton a tothe ..“will close the circuit of the wires ‘I1 and ‘I3.
actuator is with the possibility of
it and
' *‘Thusnanother function of the barrel 5 is pro
_ I
g‘ n
15 parts associatedtherewith; and in any case~,~;the
v a vided'f'namely, to’permit the closing of a circuit
15
downward movement of the push button was ‘1%,111P1. and'the-opening of'a circuit "40, by
stopped and the blow given thereto absorbed by , operation of the push button 30.‘ Obviously, if
the striking of the lower face 33 of the push but
one oftl‘re'bars 54 or 51 be‘ omitted, then the only
. '
ton upon the .upper side-of the cover 2. Thus ‘up; I operation would be to close the circuit ‘IL-‘ll or
matter‘ how violently the‘push-button is
it cannot injure parts within the housing. - 7 -
l w
when the barrel sismtnepositionrmustrated?
inFigsx3and’5Ya recess ‘44 on» the barrel is dis- ‘
posed directly under the book 23 so thatwhen
the push button 34 is depressed, the contactor
actuator is will be depressed, being moved down
wardly by the tension of the spring 23 with a pre
determined amount of cushioned force, the hook
in its lower position being indicated in broken
lines at 4i, and this downward movement of the‘
actuator is is utilized to operatea contactor
'
' which will now be described.
A contactor base 42 of insulating material is
secured upon the bottom of the box by screws
to open the'circuit 13-14 when the push button
20
is operated.
After- the contactor has been operated as above
' described by rocking the carrier 44 counter
clockwise, as viewed in Fig. 3, it may belocked
so that it will remain in that position. To ac 25'
complish this, the push button 36 is depressed
to operate the contactor which places the hook 29 ,
in the broken line position 4 l , Fig.3, and the key
is inserted in the lock and turned counter-clock
wise through 90°. A flange II on the drum 8 is
thereby rotated around until it overhangs the
end of the hook, the parts then being in the posi-'
tion shown in Fig. 7. The actuator is is there
by held downward in the contactor operating po
43—-4l, Fig. 5. Preferably integral with the base sition, maintaining ‘the contactor operated. It
42 are upstanding laterally spaced-sides 44-44 » is therefore another function of the drum to lock
.
through which a shaft 43 extends. Upon this the contactor in operated position.
shaft is oscillatably supported a contact carrier
Still another function of the drum will now be
46, Figs. 3 and 5, having rotatably mounted there
described. In some cases it may be desired, in
on a roller 41 maintained in contactwiththe un-v
eifect,to eliminate entirely the functions of the
derside of the intermediate portion of' the actu
device, that is to say, to close both circuits 'i'I-‘il
ator l9, as shown in Fig. 3, by yieldable resilient, and 19-40, and to lock them closed. To this end ,
means tending to rotate the contact carrier 46.
clockwise, as viewed in Fig. 3. The resilient
means preferably comprises .a pair of springs
45
48-43 wound around trunnions 4s_4s project
ing laterally from opposite sides of the carrier
the circuit 11-13 is closed as described above
and the drum 5 is rotated to lock the actuator I!
in its downward position; and auxiliary contact
ing means is provided which at the same time
will close andmaintain closed the circuit "40.
46 and through which the shaft 4| extends, one 7 This means, in the embodiment illustrated, com
45
end 50 of each spring being lodged one. shoulder - prises a metal bar 32, embedded in the material
5| onthe carrier and the other end 52 being of the barrel 5 and having end portions 34 and
50 lodged against a shoulder, I3 on the adjacent - 34 projecting laterally therefrom; and a pair of 50
.
spring-type contacts 35 and 36 are connected to
The contact carrier has a pair of longitudinally the metal pieces ‘I3 and "on the base 4i ‘and
spaced depending arms 44 and SI each of which normally, resiliently pressed against the side of
carries a contact bridging bar I! and 51, the pre
the barrel 5, and the spring contacts and bar end
55
ferred mounting for the bar being shown for the , portions 33 and 34 are so disposed that when the 55
bar .56, in Fig. 10, wherein a pin 53 is secured in barrel is rocked into the said locked position,
the arm projecting inwardly therefrom; the pin the spring contacts, engage the bar and complete .
is telescoped throughv a perforation inthe'bar an electric circuit therethrough.
56, and a spring I! abuts at one end upon the ~ Another function of the barrel 5 is to prevent
head 60 of the pin and at the other end upon the any operation of the device and to lock it in such
bar, resiliently holding the bar against the arm condition, and to this end the barrel 8 is pro
54, but permitting the bar to yield toward the vided with a solid portion I1 which, by inserting _
pin head when the arm 44 moves to engage con
the key and rotating the lock and the barrel, may
tacts ii and 32 on the bar with stationary con
be brought directly ‘under the hook 20, as shown
one of the sides 44.
The contacts 43 and 44-, Figs.‘
3 and 5 are mounted on metal pieces 34 and 04
' tacts 42 and _ 84.
in Fig. 9.
‘
-
By this means, when the push button I. is de
on the base 42 and terminal nuts 31 and II are‘ pressed, the .push button support will be vde
. provided for making electrical connection there
pressed and the push button 34 will be stopped
70 to. The contacts 43 and ‘I. on the bar I? may upon the top of the cover‘2, but the. actuator I! 70'
similarly make engagement with contacts ‘if and willbe held up and no operation of the con- - »
12, the latter beingmounted on metal pieces 13
and 14 having terminal nuts ‘II and ‘I. associated
The walls of the box I, for example the end
therewith to which electric connections may be walls thereof Fig. 3, may be provided with per
'
76 made.
forations as thoseshown at “and 80 through 7 .
'tactorwillresulh'.
'
'
2,138,160
which electric-wires may be conducted to the ter
minals.
' sacri?cing its advantages and within the scope of _
Such outlets may be of usual, or any . the. appended claims.
;
preferred, construction, constituting no essen
tial part of the invention, and being well known.
1. In an electric contactor construction, a main
In Fig. 11, I have shown in some detail the lock‘ .frame, two sets of contacts on the frame, an
for locking the barrel 5 to ‘the box I. A tubular, oscillatable carrier carrying contacts engageable
I
externally threaded lock- shell ' 82 is projected
claim:
,
.
'
‘
.
through a perforation 93 in the wall of the box
with the sets ofv contacts respectively when oscil
lated in one direction or the other, a spring means
and has a- nut Slyon the threads which, co
maintaining the carrier yieldably oscillated in
10 operating with a ?ange 95 on the shell clamps
the wall therebetween to mount the shell- on the
one direction, a contactor operating element mov-. 10
ably’supported on the frame, a handle for mov
box wall. The cylindrical lock plug 96, rotat
ing the contactor operating element, to oscillate
able within the shell by the key 92 has an ec
the carrier in the other direction, a rotary bar
centrically located pin 91 thereon projecting into _ rel on the frame carrying an abutment which in
a recess 98 in the barrel to turn the barrel when one rotative position of the barrel is disposed in 15
the plug is rotated. A leather or like sealing the path of the contactor operating element to
washer 93 is disposed between the inner end of prevent movement thereof and corresponding
the shell and the bottom of a recess H30 in the oscillatory movement .of the carrier thereby, and
barrel. The spring to effects pressure engage
in another position permits movement of :the
20 ment between the washer and'recess bottom and contactor'operating element, ‘lock means asso
shell end. In the modi?cation illustrated in this . clated with the contactorioperating element and
?gure, a coaxial trunnion'l?l is formed on the '
the barrel engageable in another rotative position
barrel and projects into a recess or‘ bore H02 in of "the barrel, to lock the contactor operating
the box wall.
element in carrier oscillated position, a cover for
From the foregoing it will now be clear that I i the contactor, locking means on the cover and 25
25
have provided a contactor device, comprising a barrel engaged to lock the cover on the frame in
contactor operating element or handle, ‘which
all three said rotative positions, and disengage
in the preferred form is a push button; and have
arranged a contactor which can be operated
a fourth position.
able to unlock it upon rotation ‘of the barrel to
30 thereby; and have provided a lock mechanism'
.
2; In an electric contactor construction, a 30
by which the‘contactor can be operated by the
push button; can be rendered inoperative there
by, or can be operated and locked in operated
‘position; and I have provided means‘ also by
35 which the operative parts are entirely enclosed
housing, a push button external to the housing
having a stem projecting into the housing, a re
ciprocable member in the housing .normally re
ciprocated in one directios by spring means and
reciprocable in the other direction by the push
in 'a dust and dirt proof enclosure or housing > button stern, contact'means carried by the re
Which may be locked closed to prevent unau
ciprocable member, a ?rst and ‘a second pair of
thorized access thereto; and while all of these 'contacts in the housing, the ?rst pair being nor
functions arecombined in a single device,‘ it will mally' bridged by the contact means and upon
40 be apparent that any one or any combination reciprocation of the reciprocable member by the 40
thereof may be provided and utilized optionally. push button stem the ?rst pair being unbridged
The four portions of the drum above described and the second pair being bridged, means com
are indicated upon a dial 9!, associated with the prising an element manually movable from out
lock 8, by the following legends: “Use”. when side the housing to hold the second pair bridged
45 the key is turned to that position, indicates that independently of the push button stem and aux 45
the contactor may be operated by the push but
ilary contact means operated by movement of
ton; “Off”_ indicates the position in which the the manually movable element to effect bridging
contactor cannot be operated; “0n” indicates of the ?rst pair of contacts.
_
that the contactor has been operated and locked
3. In an electric contactor construction, a hous
in that condition; and “Open” indicates that the ing, a push button external to the housing having
drum is in position to permit the cover. to be a stem projecting into the housing, a reciprocable 50
A
removed.
‘
member in the housing normally reciprocated in
In some cases» it may be desired to utilize the’ .one direction by spring means and reciprocable
device above described merely to close or open >_ in the other direction by the push button stem,
a circuit, such as that comprising the wires ‘I5 contact means carried by the reciprocable mem
and ‘I6, and to leave. the circuit locked in closed
or open position. To that end the push button
ber, a. ?rst and a second pair of contacts in the
36, and actuator I9 and carrier 46 may beomitted.
the contact means and upon reciprocation of the
housing the ?rst pair being normally bridged by
,Then when the key is inserted in the lock it may
reciprocable member by the push button stem the
?rst pair being 'unbridged and the second pair 60
into position to either engage or disengage the being bridged, a rotary element extending into
spring contacts .55 and 86 to respectively close the housing and rotatable from outside the hous
or open the. circuit 15-16 and when the key is ing, means associated with the rotatable element
withdrawn the barrel being locked in‘ position' and the reciprocable member ‘by which when the
65 will maintain the‘said circuit condition against reciprocable member has been reciprocated by 65
unauthorized change.
' I
the push button stem to bridge the second con- 1
The barrel 5 when utilized in this manner as tacts the rotary member may be rotated to a posl-,
well as in the more comprehensive'manner de- y tion in which it holds the reci'procable member
' scribed above is in ecect a selector element and reclprocated independently of the push button
stem, and auxiliary contact means associated with 70
70 may have other forms than the barrel form il
lustrated herein. In this respect ‘and in other' the-rotary element and operated by said rotary
respects as well my invention is not limited to ' movement thereof to bridge said first pair of
the exact details of construction illustrated and
described.‘ Changes andfmodi?cations may be
4. In an electric contactor construction, a hous
75 made, within the spirit of my invention without . ing, a push button external to the housing having
60 rotate the barrel 5 to bring the bridging bar 82
contacts.
,
‘
2,188,180
a stemyprojecting into the housing, a
sin-ins
retracted arm pivoted in the housing and movable
by the stem, an osciliatable element supported in
vthe housing and retracted in one oscillatory direc
tion by spring means and movable in the other
direction by the arm, and carrying bridging con
tacts, a ?rst and av second pair of contacts in the
housing alternately bridged by the bridging con
tacts upon-oscillatory movement of the oscillat
10 able element, the ‘ ?rst pair being normally
bridged, a rotary barrel in the housing manually
rotatablefrom outside the housing, interengag
,ing latch means on the barrel and arm by which
upon rotating the barrel to a predetermined posi
15 tion the arm and oscillatable element may be
latchedin a position in which the second pair of
contacts'is, bridged and the ?rs't'pair unbridged,
and auxiliary contacts on the barrel and housing
engageable upon said rotation of the barrel to said
position to bridge the first pair of contacts.
5. In an electric contactor constructioma hous
ing, a push button external to the housing having
a stem projecting into the housing, a spring re
tracted arm pivotedin the housing and movable
by. the stem, an oscillatable' element supported
in the housing and retracted in- one oscillatory
direction by spring means and movable in the
other direction by the arm, and carrying bridg-'
ing contacts, a ?rst and a second pair of contacts
5
mainsupportingframea?rstandasecond pair
of contacts, a reciprocable member reciprocable
in one direction by spring means and in the other
direction by a handle and carrying contact bridg
ingmeanstobridgethe?rstandsecondpairs
of contacts respectively when reciprocated, aux
iliary bridging means manually movable to bridge
the ?rst contact pair, a lock comprising a lock
barrel normally locked to the frame against rota
tion and releasable by a key and when released
being manually rotatable, means associated with
the barrel operated by rotation of the barrel to
hold the reciprocable member in the reciprocated
direction to bridge the second pair of contacts
and to also hold the auxiliary bridging means in
position to bridge the ?rst pair of contacts.
'
9. In an electric contactor construction. a main
frame, a ?rst and a second pair of contacts, a
reciprocable member reciprocable in one direc
tion by spring means and in the other direction
by a handle and carrying contact bridging means
to bridge the ?rst and second pairs of contacts
respectively when reciprocated, auxiliary bridging
means manually movable to bridge the ?rst con
tact pair, a lock comprising a lock-barrel nor
mally locked to the frame against rotation and
releasable by a key and when released being
manually rotatable, means associated with the
barrel rendered effective by rotation of the barrel
in the housing alternately bridged by the bridging > to one position to hold the reciprocable member 30
in'the reciprocated direction to bridge the sec
contacts upon oscillatory movement of the oscil
latable element, the ?rst pair being normally ond pair of contacts and other means associated
bridged, a rotary barrel in the housing manually with the barrel and renderedeifective by rotation
of the barrel to another position to prevent recip
rotatable from outside the housing, interen
gaging abutment means on the barrel and arm rocation of the reciprocable member.
by which upon rotation of the barrel to a prede
termined position the arm is prevented from
being moved by the push button stem.
‘6. In an electric contactor construction, a hous
}ing, a push button external to. the housing having
a- stem proiectinginto the housing, a reciprocable
member in the housing normally reciprocated in
I _ one direction by spring means and reciprocable in
the otherv direction by the push button stem, con
tact means carried by the reciprocable member, a
?rst and a. second pair of contacts in the hous
ingthe ?rst pair being normally bridged by .the
contact means and upon reciprocation of the
reciprocable-member in said other direction by
the push button stem, thev ?rst pair being un
bridged and the second pair being bridged, manu
ally operable auxiliary contact means for bridging
the ?rst pair of contacts, and means comprising
an element manually movable from-outside the
housing to hold both pairs bridged independently
10. In an electric contactor construction. a
housing, a cover closing the housing, a ?rst and
a second pair of contacts in the housing, a recip
rocable member in the housing reciprocable in
one direction by spring means and in the other
direction by a handle exterior to'the housing and
carrying contact bridging means to bridge the
?rst and second pair of contacts respectively
when reciprocated, auxiliary bridging means
manually movable to bridge the‘ ?rst contact
pair, a lock comprising a lock-barrel normally
locked to the frame against rotation and releas
able by a key and when released being manually
rotatable, means associated with the barrel ren
dered e?ective by rotation of the barrel to a pre
determined position to hold the reciprocable
member in the reciprocated direction to bridge
the second pair of contacts and latch means as
sociated with the barrel and operated by rotation
of the barrel and effective in said predetermined
of the push button.
pomtion thereof to latch the cover on the housing.
11. In an electric contactor construction, a
housing, a ‘cover closing the housing, a push but
contacts, a reciprocable member reciprocable in ton external to the housing having a stem pro
one direction by spring means and in the other jecting into the housing, a reciprocable member
direction by a handle and carrying contact bridg
in the housing normally reciprocated in one di
' ing means to bridge the'?r'st and second pairs rection by spring means and reciprocable in the
of contacts respectively when reciprocated, aux : other direction by the push button stem, contact
iliary bridging means manually movable to bridge means carried by the reciprocable member, a ?rst
the ?rst contact pair. a lock comprising a lock . and a second pair of contacts in the housing, the
barrel normally locked to the frame against rota
?rst pair being normally bridged by the contact
tion and releasable by a key and when released means and upon reciprocation of the reciprocable
7. In an electric contactor construction, a main
supporting frame, a ?rst and a second pair of
being manually rotatable, means associated with
the barrel rendered e?'ective by rotation of the
member by the push. button stem the ?rst pair
being unbridged and the second pair being
of contacts and to also hold the auxiliary bridg
ing means in position to bridge the ?rst‘ pair of
tact means operated by movement of the manu
barrel to hold the reciprocable member in the Jbridged, means comprising an element manually
to reciprocated'direction'
to bridge the second pair Y movable from outside the housing to a position
contacts.
u
'
8. In an _ electric contactor construction, a
to hold the second pair' bridged, auxiliary con’- -
ally movable element to said position to effect
bridging of the ?rst pair of contacts and latch 75
6
2,188,160
means‘ operated by movement of the manually
movable element and effective in said position
thereof to latch the cover on the housing.
12. In an electric contactor construction, a.
housing, a push button external to the housing
having a stem projecting into the housing, a re
ciprocable member in the housing normany re
ciprocated in one direction by spring ‘means and
reciprocable in vthe other direction by the push
10 button stem, contact means carried by the recip
button stem, the ?rst pair being unbridged and
the second pair being bridged, means comprising
an element manually‘ movable‘ from outside the
housing to hold the second pair bridged in one
position of the movable element and auxiliary
contact means operated by movement of the man
ually movable element to said position to effect
bridging of the ?rst pair of contacts and means
rendered e?ective by movement of the manually
movable element to another position to prevent 10
rocable member, a ?rst and a. second pair of con
reciprocatory movement or the'reciprccable ele- ‘
tacts in the housing, the ?rst pair being normally
‘bridged by the contact means and upon recipro
cation of the reciprocable member by the push
ment.
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