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Патент USA US2106324

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Jan. 25, 1938.
�6,324 `
Filed DeC. 25, 1955
2 Sheets-Sheet 1
Fay. 4
Jan. 25, 193s.
Filed Deo. 25, 1935
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Patented `ian. 25, i938
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2,106,324 "
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nonna R. Keesee, Prattsviue, Ark.?
Application December 23, 1935, Serial No. 55,8123
1 claim.' (o1. .17e-329) }
T_?is invention relates generally to devices em
drawn theretoward by means
ployed in house wiring, and particularly to a new
26, and similarly, the
type of wiring device for replacing the common
clamping member i9 is arranged to be drawn to�
ly used ceiling rosette.
The principal object of the invention is the pro~ ?vvard the third terminal lmember i8 by means of
vision of a device for facilitating the wiring of the clamping screw 20. For reasons. shortly to `5
appear, no clamping member is usually required
-bruidings for electric service with multi-con
ductor cables, through the use of which splicing
and tapping of the cable in attics and roof spaces
l@ may ?ee avoided, such connections as are neces
sary being made within the wiring device.
Another object is the provision in a ceiling
rosette of insulating means for the conductors
passing through the ceiling, so that it may be
锘 used on ceilings oi conducting material; rosettes
heretofore used lacking this advantage and being
unsuitable for such application.
With these and such other objects in view as
may appear from the description, my invention
resides in the particular iorm of construction, and
combination of the component parts of the device.
in the drawings:
' �
Fig. l is a plan View of the device, as seen from
z the lower,
2 is aorplan
view of the removable cover for
the device, as seen from above.
Fig. 3 is a section of the device, taken along the
line lll-_III of Fig. l.
4 is a section of the device, taken along
Fig. 5 illustrates the device in the service posi
Fig. 6 is an isometric view of a building in the
Wiring of which the device has been employed.
?P ierring nrst particularly to Figs. l and 3,
the hollow tube l�), of some suitable insulating
rrete al, as porcelain, is provided adjacent its-
end with the integral concentric outwardly
extending and downwardly depending recessed
-飂l flange
Within the recess of the latter, and
laterally spaced from the opening through the
tube iQ, are mounted a plurality of conductor
terminals. In the embodiment illustrated, three
such terminals
shown, which include the first
'j terminal member ld, the second terminal member
S5, and the third terminal member I8, these mem
bers being rigidly secured within the recess by
means of the mounting screws ll, l5, and 20, re~
To provide ample leakage distance in a small
diameter recess, the integral barrier 2l is intel"v
posed between the second terminal member i5
and the third terminal member i8.
For clamping a plurality of conductors to the
55 駌st terminal member I4, the clamping member
for cooperating with the second terminal mem
ber i5, the terminal screw 2l amply serving this
In Fig. 1> the device is shown with one con- l0
ductor of each of the two-conductor supply cables
Z2 connected through the first terminal member
ifi, and the other conductor of each of these
cables connected through the third terminal
members I8 and I9. One conductor of the two- 15
conductor switch cable 24 is connected to the
third terminal members i8 and I9, and the other
to the? second terminal member l5. It will be
obvious that the 駌st and second terminal mem
bers will be energized at the supply voltage when
the conductors of the switch cable 24 are elec-1 "
trically connected, as through a switch.
Figs. 2 and 3 illustrate a closure for the hol
low, or recess, containing the conductor terminals,
this closure consisting of a disk 2g, of some suit- 2- `
able insulating material, as porcelain. The di
ameter of the disk 29 is preferably substantially
the same as that of the flanged portion Il.
concentrically positioned recess is provided at the
upper side of the disk 29, in which are secured
the diametrically spaced U-shaped load contacts
3@ and 3l, by means of the respective load con
tact mounting screws 36 and 35 (Fig. 4). Each
of these contacts is provided with a laterally eX
tending base portion, to which are electrically
connected the load conductors 32 and 33, by>
means of the load terminal screws 42 and 43 re
spectively. A centrally positioned opening Il@
provides an exit from the recess for the load con
ductors 32 and 33.
The closure, or cover, just described is sub
stant'ially the same as a well known rosette cover,
and does not, in itself, constitute the present in
For retaining the cover in position, the diam
etrically spaced resilient load contact clips i3 gs 5
and 28 are secured between a Wall of the recess
of the flanged portion Il and the 駌st and sec�
ond terminal members I4 and l5 respectively,
the arrangement being such that the load com 50
tacts 3B and 3l engage the upper surface of the
load contact clips I3 and 28 in response to a
rotary movement of the cover 29. The position
of the elements under the conditions just de
scribed is illustrated in Fig. 4.
The device, designated in its entirety by the
numeral 31, is shown secured to an electrically
conducting ceiling 4l of a building in Fig. 5. 'I?he
bolts 40, which extend upwardly through the
openings l2 (Fig. l), rigidly secure the device to
the ceiling; the load cable 38, which includes the
load conductors 32 and 33, extends downwardly
to the lamp socket 39. In this illustration, the
cables 22 may be either ingoing or outgoing sup
10 ply cables, and the cable 24 the switch cable for
controlling the supplyV of energy to the lamp
socket 39.
It may be noted that all of the conductors enter
the recess of the 馻nged end ll through ~the
tubular upper portion I0, the latter extending
above the upper surface of the ceiling 4|, so, that
a wall of insulating material is Jinterposed be
tween both the conductors and the conducting
terminals, and the conducting ceiling.
The manner in which a building may be wired
without the necessity of splicing or tapping the
cabled conductors at any point above the ceiling,
all oi the necessary. connectionsbeing made with
in the wiring devices 3.1, is illustrated by Fig. 6.
25 The two-conductor. cables 22 are normally ener
gized,~ at the supply potential, while the two-con
ductor?control, cables 24 connect the switches 45
to the load circuit of the device 3.1. A con
venience outlet or wall receptacle is designated
30 by the numeral 46.
The labor saving through
the avoidance of splicing and tapping of the con
ductors in roof spaces or att頲s will be apparent
from this illustration.
While I have here illustrated and described
one embodiment of my invention, other embodi
mentswill appear from the one disclosed herein,
and it is to be understood that my invention is
to be limited only by the appended claim and
the prior art.
What I claim is new, and desire to secure by
Letters Patent, is:
The combination with a ceiling rosette of an
integral upstanding tubular portion having a rel
atively large bore for the accommodation of a
plurality of two conductor cables, said rosette
containing a pair of insulated load terminals and
an additional terminal insulated from said load
terminals, said terminals including means for
connecting one conductor of a two conductor
supply- cable to one load terminal and the other
conductor to the additional terminal, means for 20
connecting one conductor of a second two con
ductor supply cable to said one load terminal
and the other conductor to the additional ter
minal, means for connecting one conductor of a
two conductor load control cable to the other oi
said load terminals and the other conductor of
said control cable to said additional terminal, and
detachable means for connecting a load circuit
to said pair of load terminals, said detachable
means providing a closure for said rosette.
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