U.S. patent number 3,596,422 [Application Number 05/019,920] was granted by the patent office on 1971-08-03 for securing means for flooring.
Invention is credited to William A. Boettcher.
United States Patent |
3,596,422 |
Boettcher |
August 3, 1971 |
SECURING MEANS FOR FLOORING
Abstract
The invention comprises securing means for flooring laid over a
concrete base between opposite walls of rooms or halls. A set of
metal channel casings is secured on the base in spaced relation
with ends facing the walls. The casings have inturned top flanges
and are overlaid crosswise by the floor boards. The casings each
have a series of slidable sleeper sections on the inside in endwise
succession. The ends of such series are spaced from the walls
opposite them. The usual nails are driven slantwise through the
floorboards into the sleeper sections to a point where the nails
meet the metal bottom of the casings and are deflected to form
endhooks under the sleeper sections, serving to retain the flooring
to the same. The sleeper sections slide endwise when the
floorboards expand laterally from damp weather, preventing the
buckling of the floor.
Inventors: |
Boettcher; William A. (Chicago,
IL) |
Family
ID: |
21795764 |
Appl.
No.: |
05/019,920 |
Filed: |
March 16, 1970 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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778037 |
Nov 22, 1968 |
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Current U.S.
Class: |
52/338; 52/374;
52/480; 52/376 |
Current CPC
Class: |
E04F
15/04 (20130101); E04F 2201/0107 (20130101); E04F
2201/023 (20130101); E04F 2201/0511 (20130101) |
Current International
Class: |
E04F
15/04 (20060101); E04c 003/292 () |
Field of
Search: |
;52/364--375,480,376,377,573 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Sutherland; Henry C.
Assistant Examiner: Burke, III; Sam D.
Parent Case Text
This is a continuation-in-part of my application filed on Nov. 22,
1968 under Ser. No. 778,037 and now abandoned, and relates to
flooring laid on a concrete base, and more particularly to means
for securing the flooring.
Claims
I claim:
1. A sleeper construction for use in a wooden floor installation
comprising in combination: a rigid base, a series of spaced,
generally parallel elongated combination sleepers secured on said
rigid base, a plurality of floorboards disposed transversely on
said sleepers in substantially abutting relation and defining a
flooring spaced above said rigid base, nails extending through said
floorboards and having lower terminal bends anchoring said
floorboards to said sleepers, said combination sleepers comprising
elongated, channel-shaped rigid guide elements opening upward
toward the undersurface of said transverse floorboards, and a
plurality of relatively short-length, nail-penetrable elements
supported by and received in said guide elements for free
longitudinal reciprocation therein with a series of said
floorboards anchored thereto by said nails whereby expansion and
contraction of the floorboards transversely of said rigid guide
elements is permitted by free reciprocation of said nail-penetrable
elements without buckling of the floor, said rigid guide elements
including means overlying said nail-penetrable elements for
restraining them in the free longitudinal reciprocation.
2. The structure of claim 1, in which said means overlying said
nail-penetrable elements comprises inwardly directed flange
portions extending inwardly above said nail-penetrable elements for
retaining the latter in a path of linear reciprocation in said
guide elements.
3. The structure of claim 1, in which said means overlying said
nail-penetrable elements comprises inwardly directed flange
portions extending inwardly above said nail-penetrable elements for
retaining the latter in a path of linear reciprocation in said
guide elements, and said flange portions comprising continuous
flanges extending along the entire length of opposite, upper edges
of said guide elements.
4. The structure of claim 1, in which said rigid guide elements
include integral, lateral plates extending from the lower surface
thereof, such plates receiving fastening means for anchoring said
guide elements to the rigid base.
5. The structure of claim 1, said nail-penetrable elements being in
endwise engagement for longitudinal impinging influence in the
direction of said expansion and contraction.
Description
Usually, flooring over a concrete base is laid across wooden
sleepers spaced about 1 foot apart, after the sleepers have been
secured to the concrete base by nails driven into holes made in the
concrete. The flooring is then nailed to the sleepers in the usual
manner. This fixes the flooring on the immovable sleepers, and is
satisfactory at the outset, or while the weather is dry. However,
dampness and moisture tend to expand the floorboards laterally, and
their cumulative expansion is often so great in such event--as much
as 1 to 2 inches--that the flooring will buckle, develop cracks
between floor boards, and even come apart in places; and it may
also pull the sleepers out of line and loosen them from the
concrete base. Therefore, flooring so laid is unstable during damp
or rainy weather.
In view of the above situation, it is the primary object of the
present invention to provide a sleeper construction under the
flooring which holds it down while allowing it to expand in lateral
direction as first stated.
A further object is to provide a sleeper construction having long
metal retainers which cannot become deformed or thrown out of line,
such retainers keeping the sleepers in parallelism and holding them
down at all times.
A still further object is to design the retainers just mentioned in
the form of channel-shaped casings in which the sleeper
sections--to which the flooring is secured--are contained in
endwise succession and slidable with the lateral expansion of the
flooring while holding the same down.
Another object is to provide the sleeper casings with integral
baseplates at spaced points, the baseplates being perforated to
receive nails driven into holes made in the concrete base for
securing the casings to the same.
An additional object is to use the bottoms of the metal casings for
deflecting the nails driven into the sleepers to create hooks which
clamp the flooring to the sleepers.
A better understanding of the invention may be gained by reference
to the accompanying drawing, in which:
FIG. 1 is a fragmental plan view of the sleeper installation;
FIG. 2 is a view similar to FIG. 1, showing flooring laid on the
improved sleepers;
FIG. 3 is an enlarged cross section on the line 3-3 of FIG. 2;
FIG. 4 is a section on the line 4-4 of FIG. 2, showing the first
step in nailing a floorboard to a sleeper; and
FIG. 5 is a similar view, showing the final step in that
operation.
Referring specifically to the drawing, 10 denotes a fragment of the
concrete base on which the improved flooring construction is laid.
As mentioned, long sleepers are usually laid on the base about 1
foot apart for the support of the flooring. In the present case,
however, the sleepers need not be of full length but in sections or
pieces 12 laid in endwise succession and slidable in long metal
casings 13. These are of channel form with inward top bends 13a
overlapping the sleeper sections in part to form retainers for
them. They are thus exposed on top to a considerable width, as seen
in FIG. 2; and the sleeper sections in one casing are staggered in
relation to those in the next casing.
The long metal casings are amply strong to resist deforming
tendencies; and they have cross plates 15 welded to them on the
underside, as indicated at 15a in FIG. 3. The outer portions of the
plates have apertures for the application of nails 17 which are
driven into holes previously made in the concrete base 10, whereby
to securely fasten the casings to the same. The plates 15 are
staggered from one casing to the next in order to distribute the
fastening locations of the casings.
When a set of sleepers have been secured as just described, the
flooring is laid across them as shown at 18 in FIG. 2. FIG. 4 shows
that conventional floorboards 20 have a groove 20a in one edge and
a bead 20b extending from the opposite edge. Usually, each
floorboard is secured to a sleeper or subfloor by driving a nail 22
over the bead to pass through the board with an inward slant-- as
shown in FIG. 4-- and continue into the sleeper or subfloor. In the
present case each line of nails occurs over the exposed surfaces of
the sleeper sections, as indicated in FIG. 4. However, when a nail
driven through a floorboard passes through the sleeper section
underneath, the nail meets the bottom of the sleeper casing at a
sharp angle, and therefrom becomes deflected to lodge under the
sleeper section with a hook 22a, as seen in FIG. 5. The bottom
plates 15 lift the casing from the concrete base in order to clear
high spots on the surface of the base; and shims may be inserted
under the plates where the surface of the concrete base is
depressed.
When each casing 13 is filled with a series of sleeper sections 12,
the ends of the series are spaced a short distance-- an inch or
more -- from the wall opposite them, as seen in FIG. 1. The
flooring is similarly spaced at its sides from the related walls,
as shown in FIG. 2. The casings 13 come in lengths or sections easy
to handle, such as 1 or 2 feet long; and each section has at least
two pairs of cross plates 15. Casing sections of full length are
shown in the upper part of FIG. 1. When a floor in an ordinary room
is to be laid, casing sections are filled with sleeper sections and
laid on the base 10, preferably with ends terminating close to the
related walls, as indicated in FIG. 1. After the casings are
secured to the base 10, the flooring 18 is laid as previously
mentioned and illustrated in FIG. 2. Where flooring is laid in a
large hall, the practice is to start in the center and work toward
the sides until the last boards are laid spacedly from the related
walls, as shown in FIG. 2. It will be understood that this
condition may require one or both last boards to be cut
narrower.
It may now be pointed out that the spacing of the flooring from the
sidewalls is to allow for the lateral expansion of the flooring
during inclement or damp weather. Also, because the floorboards are
nailed to the sleeper sections, the lateral expansion of the
flooring will bear on the sleeper sections in one or the other
longitudinal direction. Therefore, each series of sleeper sections
is also spaced endwise from the related walls to allow for
longitudinal extension. It may be mentioned that the longitudinal
expansion of flooring is very slight; and a small space has been
indicated in the left-hand portion of FIG. 2 in anticipation of
such expansion.
It will now be apparent that the novel flooring securing means has
a number of advantageous features. First, the medium of support for
the flooring over the concrete base is no longer of wood alone, but
of long metal casings extending across the width of the flooring.
Lateral expansion of the flooring from dampness or inclement
weather is transmitted in one or the other direction to the sleeper
sections 12 which impinge on each other accordingly to slide in the
casings and relieve the flooring from pressure and tendency to
buckle or form surface cracks. Also, such tendency is resisted by
the positive hold of the side bends 13a of the casings on the
sleepers inside them. Further, each floorboard is additionally
retained to the sleepers along its course by the terminal hook
formations 22a of the nails. Finally, it is no longer necessary--
when the present securing means is employed-- to purchase
full-length sleeper lumber from the mills, as the sleepers in the
casings 13 are made up of short sections or odd remnants which are
more readily available. A securing construction for flooring is
thus had which is simple, stable and economical.
* * * * *