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Патент USA US3083867

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April 2, 1963
3,083,857
E. B. CLARK
FLOOR OUTLET FOR UNDERFLOOR nuc'r
Filed June 6, 1960
2 Sheets-Sheet 1
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Edward 3 vvC7677?
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April 2, 1963
E. B. CLARK
3,083,857
FLOOR OUTLET FOR UNDERFLOOR DUCT
Filed June 6, 1960
2 Sheets-Sheet 2
F76. a.
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United States Patent O"
3,083,857
Patented Apr. 2, 1963
2
1
a threaded adapter 15 which is mounted in an insert. Use
3,it83.857
of the threaded adapter 15 is occasioned by the fact that
the diameter of the insert is made quite large in order to
Electric tflornpany, a corporation of New York
the adapter 15 is screwed into the insert and the base
member .10 is thereafter mounted on the insert as previ
ously described. The base 10 has a pair of threaded
FLOGR UUTLET FER UNDERFLOQR DUCT
Edward B. Qlar‘lr, Mitford, Conn, assignor to General
Filed done 6, 19%, Ser. No. 34,319
1 Ciaim. (til. 2263-394)
simplify the threading of wiring therethrough.
Thus,
apertures 16 on which may be mounted a pair of mount
This invention relates to an improved ?oor outlet for
ing posts 17 for mounting three terminal blocks 18.
distribution duct. More particularly, the invention re
A top member indicated generally at 20‘ is a die cast
lates to a ?oor outlet for under?oor duct wherein electric 10
ing consisting of two sides 21 and a top 22. The two
terminals are readily accessible during installation.
open sides of the top member 20 are equipped with
=Floor outlets for under?oor duct are normally mounted
threaded apertures 23 and are disposed to seat face plates,
flush with the ?oor on an insert leading up from the
such as 24, by means of screws 25 and apertures 26, the
under?oor duct. Conventionally, the floor outlet has
screws 25 being positioned in the threaded apertures 23.
consisted of two die castings——a base and a three-sided‘
Mounted upon the interior of the top member 20‘ is a
top member which is maintained in position by screws
pair of ‘spring catches 27 which are adapted to engage the
leading upward from the underside of the base. The
lugs 11. It will be noted that the lugs ‘11 are equipped
two open sides of the top member have threaded aper
tures to accommodate face plates or electrical outlets.
Once such an outlet box is in position and the wiring is
extended through the insert, it is possible to connect the
wiring into a standard double outlet mounted on a plate
and then connect the plate to one of the open faces of
the outlet. Use of this type of outlet has been somewhat
with a beveled surface over which the spring catches 27
ride as the top member 20 is brought into engagement
with the base 10'. The underside of the lugs 11 may be
tapered slightly so that as the spring catches 27 move
into lock position, any variation in dimensions is taken‘
up by the lug taper.
The locking position of ‘spring
limited due to the fact that its interior had limited access 25 catches 27 is best illustrated in FIG. 4.
During installation, the base 10 is ?rst positioned on
only. For example, a standard telephone terminal block
the
insert of the under?oor duct by means of the adapter
could not be placed in the outlet box because some of the
ring 15 and mounting collar 13. If it is desired to mount
terminal screws would be inaccessible once the box was
the telephone terminal block illustrated in FIG. 1, the
One of the objects of the present invention is to pro 30 telephone wiring is ?rst brought up through the mount~
ing collar 13 and the mounting posts 17 are then screw
vide an outlet box for under?oor duct wherein the base
fastened to the base 10. The terminal blocks 18 are then
is ?rst mounted on the insert and the top member is
positioned on the mounting posts 17 and the various elec
added after completion of the wiring.
‘
trical connections made to these terminal blocks. The
Another object of the present invention is to provide an
back face plate is then mounted upon the top member
outlet for under?oor duct wherein a telephone terminal
20 and the exterior cord from the terminal blocks 18
block may be positioned on a base member prior to
is then run through a grommet 28 positioned in the front
attachment of a top member.
face plate 24 which is then mounted upon the top mem
The above and other objects are accomplished in ac
cordance with the following speci?cation and accom 40 ber 20. The top member 20 is equipped at its corners
with guide apertures which mate with the guide posts
panying drawing wherein:
12 and these are now brought into alignment and the top
FIG. 1 is an exploded perspective view of a ?oor out
member 20 pressed ?rmly against the base member 20.
let with a telephone terminal block;
The spring catches 27 lock the top member 20 into its
FIG. 2 is an assembled front view of the outlet illus
closed position and the external telephone connections
trated in FIG. 1;
45 can then be made. It will be noted that all internal con
FIG. 3 is a side view of the outlet illustrated in
nections could be made under conditions of complete
FIG. 2;
accessibility.
FIG. 4 is a sectional view taken along the lines 4-4
In order to remove the top member 20, it is only
of FIG. 3; and
necessary to remove one of the face plates 24 and release
FIG. 5 is a partially broken View of an outlet wherein
the spring catches 27 by a screw driver or similar tool.
a conventional convenience outlet is mounted in the box.
FIG. 5 illustrates a distribution outlet in accordance
Brie?y stated, in accordance with one of its aspects,
with this invention wherein a conventional convenience
this invention is directed to ‘a floor outlet box comprising
outlet 30 is substituted for the terminal blocks 18 of the
an oblong rectangular base member having a mounting
aperture therethrough, a lug centrally positioned on each 55 other ?gures. In this case, the convenience outlet 30 is
mounted by means of mounting screws 25 which pass
of the short sides of the base member, a top member hav
through the conventional apertures of the mounting strap
ing two sides and a top of integral construction, the two
of the convenience outlet into the threaded apertures 23
sides being disposed to engage the short sides of the base
of the top member 20. Thereafter, a face plate 31 is
member, the top member having open sides along the
two long sides of the base member adapted to seat face 60 positioned over the outlet 30 by means of a mounting
ISCI‘EIEW 32 threaded into the conventional aperture of the
plates, and a pair of spring catch-es mounted in the two
out et.
sides of the top member disposed to engage the lugs on
While the invention has been described with reference
the base member to retain the top member in engage
to speci?c embodiments thereof, it is obvious that there
ment with the base member.
Referring particularly to FIG. 1, a die cast base mem 65 may be variations which fall within the spirit of the in
vention. Therefore, the invention should be limited in
ber 10 having an oblong rectangular shape has a lug 11
scope only as may be necessitated by the scope of the ap
centrally positioned along each of the short sides and
pend-ed claim.
dowels or guide posts 12 at each of the four corners.
What I claim as new and desire to secure by Letters
Mounting of the base member 10 upon an insert (not
Patent
of the United States is:
shown) of an under?oor duct (not shown) is by means 70
An electrical terminal ?oor outlet box comprising an
of a ?anged mounting screw ‘13 extending through an
oblong rectangular base member having a mounting aper
aperture 14 in the base member 10 and tightened into
mounted on the insert.
3,083,857
tu're thereth‘ro‘ug‘h, a lug centrally positioned at each short
side of said base member, ‘a top member having two sides
and a top of integral construction, the two sides being
[disposed to engage the short sides of said base member,
said top member having open sides along [the two long
sides of said’ ‘base member adapted to seat face plates,
spaced‘ threaded apertures in said top membber for fasten
ing face plates to the open faces thereof, a perpendicular
guide member at each corner of the base member and
an aligned aperture in each ‘corner of the two sides of 10
the top member and a pair of spring catches mounted in
4
the two sides of ‘said top member disposed to engage the
lugs on said base member to lock said top member in
engagement with said base member, said spring catches
being releasable only from the interior of said box.
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,368,619
2,510,745
2,932,683
Seder-berg _____________ __ Feb. 6, 1945
Kilgore ______________ __ June 6, 1950
Flachbarth __________ __ Apr. 12, 1960
we
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