U.S. patent number 3,756,447 [Application Number 05/224,009] was granted by the patent office on 1973-09-04 for floor fitting.
This patent grant is currently assigned to Textron, Inc.. Invention is credited to Robert W. Hadfield.
United States Patent |
3,756,447 |
Hadfield |
September 4, 1973 |
FLOOR FITTING
Abstract
A floor fitting including a housing made of clear polycarbonate
plastic and having a painted interior surface, the clear plastic
providing a colored appearance for the fitting and also protecting
the colored surface from damage as by scuffing, etc.
Inventors: |
Hadfield; Robert W. (Belpre,
OH) |
Assignee: |
Textron, Inc. (Providence,
RI)
|
Family
ID: |
22838910 |
Appl.
No.: |
05/224,009 |
Filed: |
February 7, 1972 |
Current U.S.
Class: |
220/3.3;
174/483 |
Current CPC
Class: |
H02G
3/185 (20130101) |
Current International
Class: |
H02G
3/18 (20060101); H02g 003/08 () |
Field of
Search: |
;220/3.2,3.3
;174/48 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Lowrance; George E.
Assistant Examiner: Garrett; James R.
Claims
I claim:
1. In a floor fitting for an electrical underfloor distribution
system:
means forming a hollow housing and means for mounting the housing
for communication with the underfloor system, the means forming the
housing being clear, molded, polycarbonate plastic and the inside
surface of the housing having a coating of fire retardant paint,
the clear plastic providing for the paint of the inside surface to
be seen from a position away from the housing whereby the housing
partakes of a color the same as the paint and also the plastic
providing a protective shield preventing the paint on the inside
surface from being damaged by objects striking the outside surface
of the housing; and
aperture means formed in said housing and being for use in
providing electrical communication between inside and outside the
housing.
Description
This invention relates to electrical underfloor distribution
systems and in particular relates to improvements in colored floor
or service fittings.
The principle object of the invention is to provide colored floor
fittings constructed so that the color producing medium cannot be
scraped, scuffed or otherwise damaged while the fitting is
installed on the floor.
The invention will be described below in conjunction with the
following drawings wherein:
FIG. 1 is a perspective exterior view of a floor fitting
incorporating the invention;
FIG. 2 is an exploded view of the fitting of FIG. 1;
FIG. 3 is an enlarged sectional view taken along lines 3--3 of FIG.
1; and
FIG. 4 is a sectional elevational view taken along lines 4--4 of
FIG. 3.
In FIG. 1 the floor fitting 1 is disposed on the floor 2. In such
position, the fitting is clearly visible and also is susceptible to
being contacted by the foot of a person working at a desk or being
struck by moving a moving object such as a chair or by a cart or
the like.
The fitting 1 includes the base 3 and hollow housing 4 which is
adapted to fit down on the base. A pair of posts 5 on the base
receive screws 6 for locking the housing in position. A pair of
posts 10 hold the the power receptacle 11 by screws 12. The
receptacle extends through the aperture 13 and provides electrical
communication between the inside and the outside of the housing. It
will be understood that where the floor fitting is to provide a
communication outlet, the apertures 13 are omitted and a single
aperture with a grommet to hold a telephone cable is provided.
The base 3 mounts the housing for communication with the underfloor
system. The base 3 has an aperture 14 receiving the nipple 15 which
connects with an insert indicated by the dotted lines 16. The
insert is connected to one of the ducts (not shown) in the system.
The type of connection described is shown in U.S. Pat. No.
3,514,525 assigned to the assignee of this invention.
The housing 4 is molded from clear polycarbonate plastic such as
Cycolac EP 3510 by Marbon Chemical Co. Preferably the wall of the
housing is approximately 0.093 inch thick. This makes a high
strength housing easily able to withstand static or impact loads
which might be encountered in an office without cracking or
collapsing. The outer surface 20 of the housing is hard or durable
and highly scratch resistant.
The inside surface 21 is spray painted with a fire retardant paint
such as Bee Chemical Co. paint No. 10145-R5 which is
self-extinguishing and will not support combustion. In FIGS. 3 and
4 the paint is indicated by the heavy black line 22. A fire
retardant paint is used in order to minimize chances of fire in the
event of an electrical fault inside the housing.
The paint is of any desired color. The fitting partakes of this
color since the inside painted surface is fully visible through the
transparent wall.
It will be apparent that the plastic provides a protective shield
for the inside colored surface. The surface cannot be damaged even
if the housing is kicked or otherwise contacted.
* * * * *