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Патент USA US2114273

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2,114,273
Patented Apr. 12, 1938
UNITED STATES PATENT OFFECE
2,114,273
PLUG CONNECTER
William Huppert, New York, N. Y., assigner to
Ampex, Inc., New York, N. Y., a corporation of
New York
Application May 11, 1933, Serial No. 670,431
14 Claims.
rThis invention relates to plug connecters for
electric flat irons and other electrical appliances.
An object of this invention is to provide a plug
comprising a pair of mating, hollow insulating
housing parts or sections II and l2 made of phe
connecter of the character described having a two
material, having mutually contacting edges Ita
A.g5 part insulating housing and provided with novel
means for detachably attaching the parts of the
housing together without the use of screws, rivets,
stantially similar in outer shape and provided
with lower end walls i4 and Illa respectively, each
bolts or the like fastening devices.
A further object of this invention is to pro
10 vide in a plug connecter of the character de
The notches I5 `ofthe housing part II register
with the notches I5 of ythe housing part I2 to
and I 2a.
The housing parts II and I2 are sub- .
formed with a pair of spaced, curved notches I5.
scribed, a highly improved and novel switch
which shall be positive in operation and insure
form two openings |50, at the lower end of the
housing for receiving plug blades or terminals
a good electrical contact.
of an electric heating iron or other electrical
-
A still‘further object of this invention is to
.15 provide a plug connecter of the character de
appliance.
c
-
.
`
The upper end walls 2i? and 20a of the hous
scribed having improved heat insulating means
for obviating the danger of injury to the hands
ing parts II-and I2 respectively, are each formed
of the person manipulating the plug connecter.
Still another object of this invention is to pro
vide a compact, strong and rugged plug con
necter of the character described, which shall
be relativelyT inexpensive to manufacture, com
prise few and simple parts, easy to assemble and
disassemble for repair, and which shallneverthe
less be practical and eflìcient to a high degree.
Other objects of this invention will in part be
obvious and in part hereinafter pointed out.
The invention accordingly consists in the fea
tures of construction, combinations of elements
and arrangement of parts which will be exem
notches registering to form a neck opening Il
for receiving a ñexible tube ISP through which the
duplex cable I8 passesinto the plug tube i9. Said
pliñed in the construction hereinafter described,
and of which the scope of application will be indi
cated in the following claims.
In the accompanying drawing, in which is
.35 shown one of the various possible illustrative em
bodiments of this invention,
Fig. l is an elevational, cross-sectional view of
a plug connecter embodying the invention;
Fig. 2 is an elevational interior view of the
A4() plug connecter, with one of the housing parts re
moved;
Fig. 3 is an elevational interior view of the
other housing part;
Fig. 4 is a, cross-sectional view taken on line
of Fig. 2;
,45 4_4
Fig. 5 is a fragmentary,
cross-sectional view
taken through the ball and cup of the switch;
Fig. 6 is a perspective view of the pin attach
ing device for the housing parts;
.50
nol-condensate products or any other suitable
Fig. '7 is a cross-sectional view taken on line
'I-‘I of Fig. 1; and
Fig. 8 is a perspective view of my improved plug
connecter.
Referring now in detail to the drawing, I0 des
ignates a plug connecter embodying the invention,
15
with a semi-circular recess or notch Iâ, said
end walls 20, 20a. are further formed with semi
circular grooves 2l registering to form an annu
lar or circular groove for receiving the flange
portion 22 of the iìexible tube I9. The grooves
2l are formed with recesses 2Ia receiving pro
jections 22a in said ñange portion 22 to prevent
rotation of said tube.
Said tube I9 may be made
of rubber and protects the duplex cable I 3. It
is formed at the end thereof with handle exten
sions 22b which may be grasped by the fingers 30
for disconnecting the plug from an electrical ap
pliance to which the same may be attached.
The
edge of said upper end wall 20 of the housing
part II is further formed on opposite sides of
the neck opening with small projecting dowel 35
pins 23, and the edge of the upper end wall 20a,
of the housing part I2 is formed with openings
24 receiving said pins 23 to aid in registering said
housing parts when assembled.
The housing part II is formed with a bottom
wall 21 and side walls 28 and 29 extending from
the lower end wall I4 to the upper end wall 20.
The lower end wall I4 is formed at the middle
thereof and on the outer surface thereof with a
recess or cavity 30 and with a groove 3I intercon
necting said recess 3D with the inner flat surface
of said lower end wall. Extending from the
middle of the lower end wall I4 on the inside
thereof, toward the upper end wall, is a projection
32 formed with a groove 32a' communicating with
the groove 3I and having a recess or notch 33
therein.
Projecting from said bottom wall 21 is a shallow
boss 35 extending from the portion 32 and formed
with a central cylindrical opening 36. There eX 55
2
2,114,273
tends from said bottom wall 21 and adjacent the
54 and 68 from one side of the plug connecter and
boss 35, a projection 31 extending above the plane
of the edge IIa. Said projection 31 is formed
with a slot or groove 38 extending to the outer
through the openings 38 and 42 from the other
side of the plug connecter.
surface 33 of said bottom wall. Extending from
said bottom wall is another post or projection 4|
aligned with the projection 31, having the height
thereof and formed with a slot or groove 42, like
wise communicating with the outer surface 39 of
10 said bottom wall.
The housing part I2 is likewise formed with a
bottom wall 21a, similar to the bottom wall 21
of the housing part I I. Extending from the bot
tom wall 21a are side walls 28a and 29a adapted
15 to register with the side walls 28 and 29 of the
housing part II. Extending from the lower end
wall Ida of said housing part || is a projectiony 5I)
extending towards the upper end wall 20a formed
with a groove 5| registering with the groove 32.
20 Extending from the bottom wall 21a is a post 53
formed with a slot 54 communicating with the
outer surface 55 of said bottom wall 21a. The
post 53 is adapted to be received between the pro
jection 32 and the post 31 of the housing part II
25 and is formed with a cylindrical lug 56 received
within the opening 36 to aid in registering the
housing parts.
Extending from the bottom wall 21a is a second
post 59 substantially similar to the post 53 re
30 ceived between the posts 31 and 4| of the housing
part II. The post 59 is formed with a slot 60
communicating with the outer surface 55 of the
bottom wall 21a of said housing part I2.
The slot 54, it will be noted, overlaps the slot
35 38 and the slot 63 overlaps the slots 38 and 42.
The housing parts II and I2 may be placed to
gether and fastened by means of an L-shaped pin
54, shown in detail in Fig. 6 of the drawing. Said
pin 64 is provided with a shank 65 extending
through the overlapping portions of the slots 54,
38, 6G and 42. Extending from the shank 65 at an
angle thereto, is a slightly curved portion 66 ex
tending within the groove 3| and projecting into
the recess 30. The portion 61 of shank 65 adja
cent portion 66 is received within the registering
grooves 32a and 5|, said portion 61 being offset
at 58 forming a hump adapted to snap into the
recess 33 in the groove 32d to retain the pin from
sliding out. The groove 5I is sufñciently deep to
permit the pin to be pushed back to disengage the
hump
from recess 33 to allow withdrawal of
said pin.
As shown in Fig. l of the drawing, the inner
edges 51 and 6| of the slots 54 and 60 are inclined
55 in one direction, whereas the inner edges 44 and
42a of the slots 38 and 42 respectively, are inclined
in an opposite direction. With this construction,
as the pin 65 is pushed through the slots 5,4, 38,
56 and 42 the end of the pin will be guided by
60 said inclined edges through the slots, and the pin
will be slightly bent to effect a strong frictional
grip. Thus as the forward end of the pin engages
the inclined edge 51 as the pin is being introduced,
said end of the pin will be guided onto the in
clined edge 44. The inclined edge 44, will guide
the end of the pin onto the inclined edge 6I from
where said end will be guided onto the edge 42a.
With this construction the two housing parts may
be firmly attached together.
70
Of course, the housing parts may be separated
by forceably withdrawing the pin 64, the recess
33 permitting a tool to be inserted beneath the
end 65 of said pin for withdrawing the same.
It will now be understood that the shank 65
75 of the pin 64 may be seen through the openings
Looking now at the housing part I I, there inter
connects the post 4| with the side Wall 29, a web
portion 'lll having a curved slot 1| and a shoulder
12 adjacent said curved slot. Extending from the
bottom wall 21 are a pair of spaced posts 14,
aligned with the notches I5, for the purpose here
inafter appearing. Adjacent the upper end wall 10
20 there extends from the bottom wall 21 a trans
verse wall 15, parallel to said end wall and having
on one side thereof a curved slot 15, similar to the
curved slot 1| in the web 1I] and symmetrical
therewith, and a shoulder 11 adjacent said slot 15
16. The edge of wall 15 is formed with a groove
18 adjacent one end thereof and a groove 13
adjacent the opposite end thereof. There further
extends upwardly from said bottom wall 21 a
boss 8| located substantially mid-way between 20
the web 13 and the transverse wall 15 and adja
cent the wall 28.
Fixed to the bosses 14 are a pair of folded over
spring contact members
83 preferably each
formed of a single piece of metal folded in half 25
and shaped for receiving the terminal blades or
prongs inserted through the openings I5a at the
lower end of the connecter plug. The spring
contacts 83 may be fixed to the posts or bosses 14
by means of screws or rivets 84, 84a or in any
other suitable manner.
Screwed to the upper right hand corner of
the housing part || between the wall 15 and the
upper end wall 20 and adjacent the groove 18,
is a terminal binding screw 86. Interconnecting
the rivet 84a. with the screw 86 is a strip of con
ducting metal 81, one end of which is fastened to
the spring contact 83 by means of the rivet or
screw 84a, and the other end of which is formed
with a screw threaded opening receiving the,
screw 86. The strip 81 is preferably channel
shaped so as to be received within the housing
part I2 when the parts are assembled. One of
the wires from the duplex cable I8 may be fas
tened to the screw 86.
46
Mounted on the housing part || is a curved
segmental track 96 preferably made of metal and
having the ends thereof received within the slots
1I and 16. The track 35 is provided with guide
flanges 9| cn both sides thereof. Pivoted to the "50
post 8| by means of a pin or rivet 33 fixed to said
post, is a lever 95, preferably made of insulating
material and projecting through a slot S6 formed
in the wall 28. Attached to the inner end 99 of
the lever 95 is a coil compression spring i3!) en 55
gaging at the outer end thereof a ball IUI received
within a cup-shaped member |02 formed with a
central opening |03 permitting said ball to con
tact the inner surface of the curved track 9|).
As shown in Fig. 2 of the drawing, the spring
|83 presses the ball upwardly for retaining the
cup-shaped member |02 in contact with the
shoulder 11. Should the lever 95 be depressed,
when the end 93 thereof passes dead center, the
spring |38 will force or snap the ball and cup
downwardly against the shoulder 12, the ball IIJI
having rolling contact with the track, during this
action.
It will be noted that the opening |03 in the
cup-shaped member |02 is of sufficient size to 70
permit a portion of the ball IBI to project there
through for contacting the inner surface of the
track 3U. As the switch is actuated to the “on”
and “oir” position the ball IUI rolls on the inner
surface of the track thereby reducing the friction 75
3
2,114,273
and wear of the parts to a mini-mum. The cup
is somewhat loose and' thereforey does not fric
tionally rub against either the track or the pro
jections |20, |2011.. The cup. prevents the ball
from slipping out during movement of the switch
from the “on” to “off” position. By reason of the
metal to metal Contact between theI ballí and the
track the iitting mayy be4 used' for long periods of
time without appreciable wear.
10
Attached to the rivet «84 and l-ying against the
inner surface of the bottom wall 2T is a conduc
tor strip |05 terminating in an ear at |06, adja
cent the shoulder T'IL As shown in Fig; 2 off the
drawing, when the cup is in its upward position
15 or “on”, the cup |02 is in contact with the ear
|06.
If desired, the' ball may be omitted, the
spring then acting directly on the cup |02.
Fixed to the‘wallï |09, forming the bottom of the
groove i9, is a rivet or screw I l0, and fixedA to said
20 wal-l by means of said screw or rivet is a conduct
ing strip | l2 having a portion in a plane substan
tially parallel to the plane of the conductor strip
|05 and terminating in an ear ||3î aligned with
the ear |06 and parallel thereto and likewise
adapted to be engaged by the cup |02 when the
latter is in the upper or “on” position. Screwed
to the upper end of the conductor strip ||2is a
terminal binding screw |f|5 to which there may
be attached the other wire from the duplex _cable
i8. It will now be understood that> in> the posi
tion shown in Fig. 2' the switch is “on” the cur
rent passing from onel of the conductor wires
through the conductor strip 8T to one spring
contact member 83, 'and' from the other wire
"su through the conductor strip H2, cup |02, and
conductor strip |05-, to the other spring contact
member 83.
When the outer- end or handle portion of the
lever 95 isv depressed', the spring pressed cup
moves to the lower portion thereof andthe switch
is “off”. There extends upwardly from the bot
tom wall 21 of the housing part ||-" a curved wall
|20 adapted to contact one side ofthe cup |02
when the latter isv moved to its downward posi
45
tion.
~
The wall 28a of the housing part |~2 is formed
with a slot portion 96a registering with the slot
portion 96 of the wall 28 of the housing part ||,
said slots together forming; an opening for the
50 lever 95. Extendingl from the wall 21a of said
housing part |2` is a wall' or web` 15a adapted to
register and have edge to edge contact with the
wall l5. The walls 15, and 15au together form a
partition adjacent-the upper end ofA the plug con
55 necter, acting 'as a' heat insulator and protector
adjacent the neck opening of the plug connecter.
Extending from the bottom wall 21a of the
housing part | | is a curved wall |20a aligned with
the curved wall |20 of the housing part || and
60 adapted to engage the side fianges of the cup
|02 when the latter moves to its downward po
sition, said cup thus being received between said
curved walls |20 and |20a which aid in guiding
the movement of the said cup.
Extending from the transverse wall 15a of the
housing part |2 is a stepped portion |30 adapted
to contact one side edge of the upper end of
the curved track 90. Extending from the bottom
wall 21a of said housing part |2 is a small. post
70 |3| adapted to engage the side edge of the lower
end of said track 90. With this construction, the
track is firmly held in place when the housing
parts are attached together.
Extending from the walls 29 and 29a of the
75 housing parts || and |2 are webs |2| and |2|a
adapted to be aligned with and engage the outer
surface of' the track 90 to aid in positioning said
track. A cylindrical projection |23 extending
from the bottom wall 21a, of the housing part |2
serves to receive a portion of the screw or rivet
93r when the housing parts are placed together.
It will now be understood that all of the metal
or current carrying parts may be attached and
assembled with the housing part ||. The wires
from the conductor cable I8 may be attached to 10
the binding posts and thereafter the housing
part |2 may be placed over the housing part I|
an-d the pin 64' inserted to attach the two parts
together.
,
The housing parts || and |2 are preferably 15
molded. In molding said members the‘bottom of
the molds may be provided with projections for
forming the slots 42 and 38 of the member ||
and the slots 54 and 60 of the housing member |2.
By moldingthe members in this manner the 20
molded members can be readily removed from the
molds by merely lifting.
It will thus be seen that there is provided a de
vice in which the several objects of this inven
tion are achieved, and which is welly adapted to 25
meet theA conditions of practical use.
As various possible embodiments lmight be
made of the above invention, and as various
changes might be made-in the embodiment above
set forth, it is to be understood that all matter 30
herein set forth or shown in the accompanying
drawing is to be interpreted as illustrative and not
in a limiting sense.
Having thus described my invention, I claim
as new and desire to secure by Letters Patent:
1-. An electrical attachment ñtting comprising
an insulating housing, a curved segmental track
mounted within said housing, a lever pivoted to
said housing, a coil compression spring attached
to one endv of said lever, a member slidably 40
mounted on said track having an opening,l a ball
received in said member and partially extend
ing through saidopening, said spring engaging
said ball to press the same against` the inner sur
face of said track.
45
2. An electrical attachment fitting' comprising
an insulating housing, a curved segmental track
mounted within said housing, a lever pivoted to
said housing, a coilv compression spring attached
to one end of said lever, a member slidably 50
mounted on said track, having an opening, a kball
received in said member and partially extending
through saidl opening, said spring engaging said
ball to press the same against the inner surface
of said track, said track having flanges engaging 55
opposite sides of said member for guiding the
same.
3. An electrical attachment fitting comprising
an insulating housing having a pair of spaced
walls formed with slots, a curved track mounted 60
within said housing and having the ends thereof
receive-d within said slots, a lever pivoted to said
housing, a spring attached at one end thereof di
rectly to an end of said lever, and a member di
rectly engaging the inner surface of said track 65
and pressed by said spring against said inner
surface, and means actuated by said spring for
slidably moving said member in said track.
4. An electrical attachment ñtting comprising
an insulating housing having a pair of spaced 70
walls formed with slots, a curved track mounted
within said housing and having the ends thereof
received within said slots, a lever pivoted to said
housing, a spring attached at one end thereof di
rectly to an end of said lever, and a member di
4
2,114,273
rectly engaging the inner surface of said track
and pressed by said spring against said inner
surface, said track having guide flanges engaging
opposite sides of said member.
5. An electric attachment fitting comprising an
insulating housing having a pair of spaced Walls
formed With slots and shoulders adjacent said
slots, a curved track having the ends thereof re
ceived Within said slots, a lever pivoted to said
10 housing, a spring attached at one end thereof to
an end of said lever, a cup-shaped member en
gaging the inner surface of said track, said cup
shaped member having an opening, a ball pressed
by said spring against the inner surface of said
.1,5 track, said ball extending through said opening
in said cup-shaped member, said cup-shaped
member being adapted to strike said shoulders
upon, manipulating said lever.
6. An electric attachment fitting comprising an
v20 insulating housing having a pair of spacedvvalls
formed With slots and shoulders adjacent said
slots, a curved track having the ends thereof re
ceived Within said slots, a lever pivoted to said
housing, a spring attached at one end thereof to
.25 an end of said lever, a cup-shaped member en
gaging the inner surface of said track, said cup
shaped member having an opening, a ball pressed
by said spring against the inner surface of said
track, said ball extending through said opening
30 in said cup-shaped member, said cup-shaped
member being adapted to strike said shoulders
upon manipulating said lever, and said curved
track having a pair of flanges engaging opposite
sides of said cup-shaped member.
'7. An electric attachment fitting comprising
l35
an insulating housing, a curved track Within said
housing, a lever pivoted to said housing, a ball
engaging the inner surface of said track, and
a spring cooperating with said lever for directly
40 pressing said ball against said track, a member
slidably movable in said track and adapted to be
so moved by said ball.
8. An electrical attachment fitting comprising
an insulating housing, a curved segmental track
mounted within said housing, a lever pivoted to
said housing, a coil compression spring attached
to one end of said lever, a member slidably
mounted on said track and having an opening,
a ball received in said member and partially
extending through said opening, said spring en
gaging said ball to press the same against the
inner surface of said track, and means on op
posite sides of said member for guiding the same
during movement thereof.
9. An electrical attachment ñtting comprising
an insulating housing, a curved segmental track
mounted Within said housing, a lever pivoted to
said housing, a coil compression spring attached
directly to one end of said lever, a member slid
ably movable on said track, said spring engaging
said member to press the same directly against
the inner surface of said track.
,
10. An electrical attachment ñtting comprising
an insulating housing and a switch Within said
housing including a curved track, and a member
having rolling contact With said track, said mem
ber being freely rotatable in all directions, and
means for oscillating said member on said track.
11. An electrical attachment fitting compris
ing an insulating housing, a curved metal track 15
Within said housing, a lever pivoted to said hous
ing, and a spring pressed metal member fric
tionally engaging the inner surface of said track
and means cooperating with said lever for slid
ably moving said member along the surface of 20
said track.
12. An electrical attachment ñtting comprising
an insulating housing, a curved metal track
Within said housing, a lever pivoted to said hous
ing and a spring pressed metal member directly y25
engaging the inner surface of said track and
cooperating with said lever, said spring pressed
member having universal rolling contact with
said track, said track being provided with guide>
30
flanges engaging opposite sides of said member.
13. An electrical attachment fitting compris
ing a pair of mating housing insulating parts,
means for attaching said parts together, a curved
track Within said housing, a shaft fixed to one of
the housing parts, a lever pivotally mounted on 35
said shaft, a spring attached at one end thereof
to said lever, a member engaging said spring
and pressed thereby against the inner surface of
said track, said other housing part having a
tubular portion receiving the free end of said 40
shaft.
14. An electrical attachment fitting compris
ing a pair of mating housing parts, one of said
parts being formed With spaced slots, an inde
pendent curved track member mounted Within 45
said housing parts and having the ends thereof
received Within said slots, a lever pivoted to
said housing, a spring attached at one end there
of to an end of said lever, a member engaging
the inner surface of said track and pressed by 50
said spring against said inner surface, and pro
jections on the other of said housing parts en
gaging the side edges of the ends of said curved
track to aid in positioning of said track.
WILLIAM HUPPERT.
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