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_ Nov. 5, 1946.
.1. E. STEVENS
2,410,691
ELECTRICAL CONNECTOR
Filed Ma_r0h l9,v 1942
50
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INVENTO/P ~
J.E. STEVE/VS '
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A7‘ ORNEY
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Patented Nov. 5, 1945
2,410,591
' UNITED STATES PATENT oFFicE"
ELECTRECAL CONNECTOR’
John E. Stevens, Silver Beach, N. Y., assignor to
Western Electric Company, Incorporated, New
York, N. Y., a corporation of New York
1
Application March 19, 1942, Serial No. 435,335
5 Claims. (01. 173—328)
This invention relates to electrical connectors,
2
electrically connecting electrically operated de
spacers dividing the adjacent side of the body
into three substantially equal areas. An abut
ting member 2! is also formed integral with the
vices to terminals in fuse boxes.
In many factory departments the power serv
body H) with the spacers leer 20 Or secured with
5 the spacers to the body, all of which areformed
andlmore particularly to connectors for use in
ices for the various electrically operated machines
are provided with fuse boxes available in ?xed
positions upon walls or columns, and it is fre
of suitable insulating material. Clamp units, in
dicated generally at 23, 2d and 25, are disposed
at spaced positions, as illustrated in Fig. 3, these
units being identical in structure and a descrip
quently desirable to temporarily use ?oor scrapers
or other electrically operated devices in such lo 10 tion of one will apply to all. Consider, for ex
calities where electrical connections therefor are
ample, the unit illustrated in Fig. 2. This unit
not permanently made available. In such in
consists of a pair of clamping jaws 21' of the con
stances it is found advantageous to make use of
tour illustrated in Figs. 2, 3 and 4 and having in
the fuse boxes for such connections, this, how
wardly bent integral portions adjacent the cen
ever, necessitating a connector adaptable for such 15 ters of their sides, as indicated at 23, for pivotal
use.
-
An object of the invention is to provide an
electrical connector which is simple in construc
mounting on a common shaft 29.
The ends of
the shaft extend through elongate apertures 30
in the legs of a U-shaped guide 3|, to maintain
tion, easily operable and particularly adapted for
the accurate positions of the clamping jaws 2'!
electrical connection with fuse terminals of a 20 during their movement into and out of clamping
fuse box.
positions. A spring 32, of the contour illustrated
With this and other objects in view, the inven
in Fig. 3,‘ has two coiled portions disposed on the
tion comprises an electrical connector having a
shaft 29, a central loop portion 33 engaging one
bodyof insulating material supporting a plu
of the clamping jaws 27 while ends at engage the
ra1ity of clamp units normally urged into open 25 other clamping jaw, tending to normally urge
position but simultaneously moved into closed po
the jaws into open positions. A connecting rod
sition by connected cams to cause the clamps to
35 is connected to the shaft 29 by an aperture
grip a plurality of terminals.
in the rod through which the shaft extends, the
Other objects and advantages will be apparent
rod extending upwardly (Fig. 4) or to the left
from the following detailed description when con 30 (Fig. 2), where a threaded portion thereof is
sidered in conjunction with the accompanying
connected to a pull rod 3?. The pull rod 31 ex
drawing, wherein
Fig. l is a front 'elevational view of an open
fuse box, with the connector attached to the ter
tends through a disc-like cam element 38, an ap
erture in the U-shaped guide 3i and through the
central aperture of a hollow bolt 40. The hollow
minals therein to supply electrical energy to an 03 (I! bolt 40 is provided with a head Ill which serves
electrically operated device;
Fig. 2 is a vertical sectional view of the con
hector;
Fig. 3 is an end elevational View of the con
nector, and
Fig. 4 is a fragmentary detailed View of one
section of the connector illustrating the mount
ing thereof on a terminal in the fuse box.
Referring now to the drawing, attention is ?rst
directed to Figs. 2 and 3, which illustrate a body
it, of the contour illustrated, having an aperture
ll therein adjacent the mounting of a hollow
to hold a terminal 42 in place through the aid
of a nut 43, the bolt, as illustrated in Fig. 2, ex
tending through an aperture in the body H}. A
hollow cup-shaped member 44, formed of insulat
40 ing material, is disposed over the nut 43 to seal
it against engagement by the hand of the op
erator, the outer surface of the cup being dished,
as at 45, to receive an actuating cam 56. The
cam 46 is formed of suitable insulating material
and is centrally grooved to receive the pull rod
3?, which is connected to the cam, through a
pivot pin 4?.
bracket If, to receive conductors M of a conduc- _
Attention is directed to the contour of the cam,
particularly a curved surface 48 which rides on
threadedly disposed in the hollow bracket l2, 50 the dished surface 45 of the cup 44 when the cam
and, with the aid of a nut ll, the cord I5 is held
is actuated, to cause longitudinal movement of
tor cord l5. A tubular member It has one end
in place. The elements l2, l6 and I‘! unite in
the pull rod during the movement of the cam
forming a handle for the body I ll.
from the position shown in Fig. 2 to the position
Insulating spacers l9 and 20 are formed inte
shown in Figs. 1 and 4.
gral with the body [0 or secured thereto, these 55 The structure of the clamping units 23, 24- and
2,410,691
3
25 thus far described is identical in each unit,
there being provided a connecting bar 50 ex
tending across the cams 46 and secured thereto,
4
ends of the jaws against their respective termi
nals 60. Thus a positive clamping engagement
results between the clamping jaws and the ter
minals, forming a positive electrical connection
this bar being formed of suitable insulating ma
terial.
UK between the supply of electrical energy leading
to the terminal 60 through the clamps of each
Attention is now directed to Figs. 1 and 4,
unit, terminal 42, conductors Hi, to the socket
which illustrate the use of the clamp in forming
65. The electrically operated device 53 may then
an electrical connection for an. electrically oper
be supplied with the electrical energy by com
ated device such as a motor operated hand drill
53. In this illustration a fuse box 55 is mounted 10 pleting the connection of the plug 66 with the
upon a wall or column 56 and is provided with
a cover 51 to completely enclose theelectrical
socket 65. This connection may be maintained
during’ the use of device 53, the cams 46 being
moved’ beyond a dead center with respect to the
mechanism disclosed in the box. In the present
pivots 4.1 of the pull rods 31, assuring ‘against ac
embodiment the electrical mechanism in the box
consists of a mounting 58 to receive electrical 15' cidental release of their connections due to any
possible pull on the cable.
connections from supply lines 59 and is also pro
During the forming of the connection of the
vided with sets of terminals 6!! for receiving fuses
connector with the terminals in the'fuse box, the
6|. In the present embodiment only the upper
abutting member 2| rests against the mounting
set of terminals 60 is illustrated, the clamp being
unit 58 to serve not only in locating the clamp
connected to the lower set of terminals as illus
ing jaws accurately with respect to the termi
trated more in detail in Fig. 4. In Fig. 4 the
nals Gil to which they are to be connected but
standard terminal 66 is formed of resilient con
to assist in maintaining the clamping units
ductive material, U-shaped in general contour,
against accidental displacement. When it is de
to receive between the arcuately curved portions
sirable to disconnect the clamp, all the operator
62 of the legs thereof a standard fuse 6!. The
need do is to move the bar 5!] to the position
ends of the terminals thus normally project out
wardly a sufficient distance, where access may
~ shown in Fig. 2, simultaneously imparting move
ment of the cam 46 and thus releasing simul
taneously the shaft 29. The spring 32 then func
Attention is directed to the contours of the
clamping jaws 21 as compared to the contours of 30 tions to move the clamping jaws 21 into open
positions. out of engagement with the terminals,
the ends of the terminal 60 in Fig. 4, making it
thus freeing the clamp for removal from the fuse
possible to form a rigid connection between the
box.
clamping jaws and the terminal when force is
behad thereto for the clamping jaws 21.
applied to move the outer ends of the jaws into
intimate engagement with the outer ends of the
In reviewing the operation of the clamp, it will
be apparent that the plurality of clamping units
may be readily secured to the terminals of the
terminal.
fuse box, requiring only the use of one hand of
In completing the description of the structure
the operator to support the clamp by the handle,
of the clamp, attention is directed to a socket E5
move it into position through the aid of the abut
electrically connected to the conductors l4, these
conductors also being electrically connected to 40 ting member 2I and, through downward pres
sure with the thumb of the same hand on the
their respective terminal 62 of their clamping
bar 5!), the cam 46 may simultaneously be moved
units 23, 24 and 25. A plug 68, connected to a
cord 67 including a similar arrangement of con
ductors extending from the electrically operated
device 53, is adapted for connection with the .1.
socket 65.
With the aid of theelectrical connector any
electrically operated device,v such as the one
shown, may be. provided with suitable electrical
into clamping position. A similar but reverse
movement imparted to the bar will readily free
the clamps by moving the cams into their open
positions shown in Fig. 2.
.
Although speci?c improvements of the inven
tion have been shown and described it will be
understood that they are but illustrative and that
energy in any location where a fuse box is pres 50 various modi?cations may be made therein with
out departing from the scope and spirit of this
ent. To make such an electrical connection, let
it be presumed that the socket 85 and the plug
invention as de?ned by the appended claims.
66 have been separated, leaving the clamp with
\Vhat is claimed is:
'
the short cable connection and the socket 55 at
1. An electrical connector comprising com
panion clamping jaws having like ends to jointly
tached thereto. The operator may then, ‘by open
clamp a terminal when moved into clamping po~
ing the cover 51 of the fuse box 55, move the
clampto a position where‘ the clamping units 23,
sit-ions and opposing ends to be engaged for
movement of the jaws, a shaft having the jaws
24 and’ 25 will be in registration with the set of
vpivotally mounted thereon intermediate their
terminals 60 to which connection is desired, the
abutting member 2| adapted to engage ‘the (30 ends, an element formed to engage the said op
mounting 53 to assist in the positioning of the
clamp units. When the connector is thus posi
tioned downward pressure maybe applied to the
bar 50 to simultaneously move the cams 46 about
their aligned pivot pins d‘! to move the pull rods
posing ends of the jaws and cause movement of
the jaws about the shaft to move the said clamp
ing ends into clamping positions ‘upon movement
of the shaft and clampingjaws relative to the ele
ment, a'oam, :and a pull rod operatively connect
3? longitudinally, to effect simultaneous closing
ing the shaft and the cam to cause the movement
of the clamping jaws of the units. The move
ment of the cams 48 through arcs of ninety de
grees will cause movement of the pull rods 31
of the shaft and jaws relative to the element.
2. An electrical connector ‘to connect an elec
trically operable unit to a supply of electrical
energy through substantially ‘Ll-shaped fuse ter
and their connecting rods .35, pulling the clamp
ing jaws, through their shafts 29, relative to their
respective cam elements 38, causing :outward
minals supporting fuses ‘between the legs thereof,
the connector comprising a .body, a plurality of
clamp units each including companion clamping
movement of the adjacent ends/‘of the jaws to
jaws having like ends to engage their adjacent
move the jaws about their shaft 29 andvthus im
part simultaneous inward movement of the outer 75 legs of. their respective terminal and’ jointly grip
2,410,691
5
the terminal when moved into clamping posi- -
tions and opposing ends to be engaged for move
ment of the jaws, a shaft for each clamp unit
having the jaws thereof pivotally mounted
8
ing jaws having like ends to engage their adja
cent legs of their respective terminal and jointly
grip the terminal when moved into clamping po
sitions and opposing ends to be engaged for
movement of the jaws, a shaft for each clamp
unit having the jaws thereof pivotally mounted
thereon intermediate their ends, an element for
thereon intermediate their ends, an element for
each clamp unit formed to engage the said op
posing ends of the jaws and cause movement of
the jaws about their shaft to move the said
each clamp unit formed to engage the said op
clamping ends into clamping positions upon
posing ends of the jaws and cause movement of
movement of the shaft and clamping jaws rel- 10 the jaws about their shaft to move the said
ative to the element, and means jointly con
clamping ends into clamping positions upon
nected to the shafts of each clamp unit to cause
movement of the shaft and clamping jaws rel
simultaneous movement thereof with their
ative to the element, cams operatively connect
clamping jaws relative to their elements.
ed to the shafts to cause movement thereof with
3. An electrical connector to connect an elec-v 15 their clamping jaws relative to their elements,
trically operable unit to a supply of electrical
and means connecting the cams for simultaneous
energy through substantially U-shaped fuse ter
actuation thereof.
minals supporting fuses between the legs there-of,
5. An electrical connector to connect an elec
the connector comprising a body, a plurality of
trically operable unit to a supply of electrical
clamp units each including companion clamp 20 energy through substantially U-shaped fuse ter
minals supporting fuses between the legs thereof,
ing jaws having like ends to engage their adja
cent legs of their respective terminal and jointly
grip the terminal when moved into clamping
positions and opposing ends to be engaged for
movement of the jaws, a shaft for each clamp
unit having the jaws thereof pivotally mounted
thereon intermediate their ends, an element for
each clamp unit formed to engage the said op
posing ends of the jaws and cause movement of
the jaws about their shaft to move the said
clamping ends into clamping positions upon
movement of the shaft and clamping jaws rel
ative to the element, and cams operatively con
nected to the shafts to cause movement thereof
with their clamping jaws relative to their ele
ments.
4. An electrical connector to connect an elec
trically operable unit to a supply of electrical
the connector comprising a body, a plurality of
clamp units each including companion clamp
ing jaws having like ends to engage their adja
cent legs of their respective terminal and jointly
grip the terminal when moved into clamping po
sitions and opposing ends to be engaged for
movement of the jaws, a shaft for each clamp
unit having the jaws thereof pivotally mounted
thereon intermediate their ends, an element for
each clamp unit formed to engage the said op
posing ends of the jaws and cause movement of
the jaws about their shaft ‘to move the said
clamping ends into clamping positions upon
35 movement of the shaft and clamping jaws rel
ative to the element, means in each unit to guide
the shaft thereof in its movement relative to the
element, and cams operatively connected to the
shafts to cause movement thereof with their
energy through substantially U-shaped fuse ter
minals supporting fuses between the legs thereof, 4:0 clamping jaws relative to their elements.
the connector comprising a body, a plurality of
clamp units each including companion clamp
JOHN E. STEVENS.
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