US1216644A - Apparatus for constructing concrete floors. - Google Patents

Description

' F. AMBURSEN.

APPARATUS FOR CONSTRUCTING CONCRETE FLOORS.

APPLICATION FILED MA-Y 31. I916- I Patented Feb. 20, 1917.

2 SHEETS-SHEET 1.

MAIL)! N. F. AMBURSEN. APPARATUS FOR CONSTRUGTING CONCRETE FLOORS.

APPLICATION FILED MAY 31. l96- k Patented Feb. 20,1917.

2 SHEETS-SHEET 2.

PATENT OFFICE.

NIIJS FREDERICK 'AMBURSEN, OF BROOKLINE, MASSACHUSETTS.

APPARATUS FOR CONSTRUCTING CONCRETE FLOORS.

To all whom it may concern:

Be it known that I, N1Ls FREDERICK AM- BURsnN, a citizen of the United States, and a resident of Brookline, in the county of Norfolk and State of Massachusetts, have in vented a new and useful Improvement in Apparatus for Constructing Concrete Floors, of which the following is a'specification.

My invention relates to methods of and apparatus for constructing concrete floors, and its object is to cheapen such construction by eliminating the wooden forms heretofore employed and the skilled labor required to make and place the same, and otherwise to improve and simplify the existing methods.

Heretofore in laying concrete floors it has been customary to use wooden forms or falsework in which the concrete is poured and which are removed after the concrete has set, such wooden forms requiring skilled labor for their construction and being destroyed by their removal, so that being capable of but one use they represent a relatively large item in the cost of concrete, floor construction. 1

By means of the present invention I am able to greatly reduce this item and save time, labor and material by the use of sectional metallic arches frictionally-isup-ported in channel-irons, such arches and channels constituting a mold or form in which the concrete is poured to form the floor. The molds or forms so constructed by such metallic members may be placed in position by unskilled labor and after the concrete has herdened may be removed for further use as distinguished from-the wooden forms of the prior art which are destroyed by removal. Furthermore, such forms require very few temporary supports, because the'strength of the channel-irons will enablethem to span a considerable space, for instance about twenty-five feet, and support the. concrete load placed thereon, while the wooden forms of the prior art must be supported at relatively short intervals by false-work.

One embodiment of my invention is shown in the accompanying drawings, in which.

Figure 1 is a transv'erse section of a concrete floor constructed in accordance with my method, the forms being shown in position. Fig. 2 is a plan view showing the forms before the concrete has been poured. Fig. 3 is a similar plan view on a smaller Specification of Letters Patent.

Patented Feb. 20, 1917.

Application filed May 31, 1916. Serial No. 100,787.

scale, showing one mode of attaching the floormg to the side wall. Fig. 4 is a fragmentary view showing in transverse section a modification'of the form represented in Flg. 1. I

Y In the particular drawings selected for more'fully disclosing my improved method and apparatus for practising the same, 1, 1 represent light channels, the size and strength of which will of course vary according to the span of the floor, the webs of said channels being apertured at inter vals bf about two feet to receive the bolts 2 which pass freely through said holes and "have threaded engagement with the clamps 3 which, as shown in Figs. land 2, are square bars having their ends chamfered to conform to the slant of the inner faces of the flanges of the channels. In the preferred form of my invention the upper faces of the clampsare grooved to receive the reinforclng rods 4, 4, which extend longitudinally of the channels a short distance above thewebs thereof. As shown in the present instance, said rods may be secured to the clamps by means of wires 5,'or in any other suitable manner. Spanning the space between each pair of channels is a metallic arch-plate, preferably of steel about one- /eighth of an inch thick, each end of the arch-plate resting as shown on the web of a channel.- The arch-plates are held in frictional engagement with the flanges of the channels by meansof the clamps, which, when the bolts 2, 2 are tightened, will be drawn toward the webs of the channels and force the ends of the arch-plates against the flanges thereof.

As shown in Fig. 3, the channels will be temporarily supported on stringers or other false-work X, which may be placed as far as twenty-five feet apart, one such stringer only being shown in Fig. 3, and the arch-plates 'for convenience in handling preferably are made in sections about five feet in length, the several sections 6, 6, 6" being shown in the present instance as overlapping.

After a floor-mold has been constructed in the manner above set forth, the concrete 11 is poured and allowed to harden, and after it has set the channels and arch-plates are removed by unscrewing the bolts 2, Whereupon they may be used over again. as obviousl they are not destroyed by removal.

T e clamps 3 are of course left in the concrete and can be used for fastening steel lathing for the ceiling, the bolts 2 in such case being employed for this purpose.

In the modification shown in Fig, 4, the

clamping member is shown as a rod 8, around 7 which passes the wire loop 9, and the ends of said loop project through the aperture in 1 the web of the channel, so that assaid ends are twisted around the .block 10 of suitable material inserted through the loop, the ends of the arch-plates will be securely held in position I against the flanges of the channel.

In this case, after theconcrete' has set, the

i wire is untwisted and the channels and archplates removed as before, whereuponthe wire loop 9 can be used-Ifor fastening the 'lath for the ceiling."

As shown in Fig; 3, the ends 4 of the rein- I forcing rods tjextends into the Wall 7 of the building and thereby strengthens the juncture of the flooring and the wall, the entire structure of course being monolithic.

By means of the method herein described the cost of forms and false-work may be reduced to about fifty per cent. of that required when such floors are'constructed by existing methods.

It will be obvious to those skilled in the art V that various modifications may be made, both in the methodherein described and also the apparatus whereby such method is carried into effect, without departing from the principle of my invention. 7

subscribed my .1916.

W II csses': '4 p Havin thus described illustrative embodiments 0 my invention, without however limitingthe same thereto, what I claim and desire to secure b Letters Patent is- 1. Apparatus or constructing concrete,- floors comprising spaced channels having upwardly extending flanges, means for temporarily supporting the same, metallic archplates each having its ends resting on the webs of a pair ofadjacent channels, and means for clamping the adjacent ends of each pair of arch-plates-to the flanges of a channel. 2

2. Apparatus for constructing concrete floors comprising spaced channels, means for temporarily supporting the same, metallic arch-plates each having its ends resting on a pair'of adjacentchannels, clamping members arranged transversel of said channels and located between the ii anges thereof, the ends of said arch-plates being between said flanges and the ends of said clamping members, and bolts passing through apertures in the webs of said channels and having threadedengagement' with said clamping members. In testimony whereof, I have hereunto name this 29th day of May,

Geo. K. WoonwoRTH',

E. B. ToMLINsoN.

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