US1164319A - Concrete-form. - Google Patents

Description

M. STIELER.

CONCRETE FORM.

APPLICATION FILED AUG.II. |915A 64,319. IPatented 1160.111915.

. 2 SHEETS-SHEET M. STIELER.

CONCRETE FORM.

APPLICATION FILED AUG. Il, 1915. 1.164.819. Patented 1160.111915..

2 SHEETS-SHEET 2.

@IgM/'U2 COLUMBIA PLANOGRAPH Co..WAsH|NaTON, D. C.

MARTIN STIELEBJ, OF CHICAGO, ILLINOIS.

CONCRETE-FORM.

Specification of Letters Patent.

Patented Dec. 1d, 1915'.

Application lcd August '11, 1915. Serial N o. 44,968.

To all whom t may concern Be it known that I, MARTIN STIELER, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, have-invented certain new and useful Improvements in Concretef Forms, of which the following is a specilication.

My invention relates to improvements in concrete forms, and has for its object the provision of an improved construction of this character arranged to facilitate and expedite the building of concrete 'structures of various forms and shapes.

The invention consists yin the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specication, and in which, 1

Figure 1 is a vertical section showing a portion of a form embrdying my invention, also a portion of a chimney as built by the form, said figure being a section taken on line 1-1 of Fig. 5, Fig. 2, an enlarged elevation of a cable winding drum employed in the construction, Fig; 3, a section taken on line 3-3 of Fig. 2, Fig. 4, a side view of the cable winding construction, Fig. 5, a partial horizontal section of the form, Fig. 6,.an enlarged elevation illustrating the form of plates employed in the construction, Fig, 7, a section taken on line 7-7 of Fig. 6, Fig. 8, an enlarged section illustrating the method of attaching plates to their stifliening bars, and Fig. 9, an enlarged vertical section of an interiorV plate of the form, taken on line 9 9 of Fig. 5.

The preferred form of construction, as illustrated in the drawings, comprises an outer and an inner form member. said members being arranged concentrically so as to form sections of the chimney. The outer form consists of a plurality of flexible sheet metal plates 10 outwardly offset at one edge 11 to rest loosely over the corresponding edges of the adjoining plates. Vertical stiifening bars 12 and 13 are secured to the outer side of each of the plates 10, the bar 12 being secured along the edge opposite said offset portion 11 and bars 13 being equally spaced across the body of the plate, as shown, there being three of the bars 13 employed. Each of the bars 12 is provided with a lateral extension 14 arranged to overlap the corresponding portion l10n the adjoining plate. The bars 12-13 aresecured to the plates 10 by means of screwbolts 15, the inner ends of the bolt-holes through said bars being countersunk at 16, so that when the bolts are tightened'in po-V sition, the corresponding portions of plate 10 will be drawn into said countersinlzs thus providing a secure connection betweenthe bars and the plates and providing a smooth inner surface on the plates, as shown in Fig.

8.; Bars 12--13 are outwardly offset at their upper-portions 17-18 and at their lower portions 19-20 and a plate 2l is mounted under the upper offset portions, said plate being adapted to fit under the lower offset portions on the next plate above and thus constitute abond between the plates at their tops and bottoms, as will be readily under stood. The plates 11 are provided with elongated slots 22 fitting the corresponding bolts 152so as to permit of latitude of movement between the bars and the plates and thus permit of changes in curvature in plates V10.

At one end each of the plates 21 is provided with a bifurcated extension 23 adapted to engage the corresponding bolt 24 on the adjoining plate thus effecting a good lateral bondloetweenV the plates 10. Steps in the form of triangular loops 25 are secured to the cuter sides of one of the bars 13 0n each 0f the plates 1() and cables 26 are passed around the plates 10 immediately above the steps 25 so as to hold the same in place. said steps 25 thus serving to properly position the cables 26 and at the same time 'as means of supporting' workmen on the exterior `of tbe form. One end of each of tbe cables 26 is anchored to a bolt 27 secured between two angle irons 28 fastened to the outside of one of the plates 10. The other end of each of the cables 2G is angularly bent and passed through a perforation 29 in a winding drum 30 rotatably mounted between angle `irons 28.

An eccentric clamping lever 31 is arranged in each of the drums 30 to clamp the corresponding end of the corresponding cable 26 in perforation 29 so as to prevent withdrawal of the same. Drum 30 carries a ratchet wheel 32 cooperating with a pawl 33 and a squared trunnion 34 by means of which said drum may be engaged and rotated by a wrench. By this arrangement, the plates 10 may be nicely drawn and held. in proper positions.

' modifie The interior porti-on of the mold is made4 up of plates 10 identical yin all respects with the plates l0 in the exterior part ofthe mold except that hooks 35 are provided `:on the bars 12-13 instead of' steps 25. VIn this instance, the plates are secured in proper form by barsV or rods 36' provided inthe hooks 35 and overlapping at their ends, as shown.

In practice, a certain `number of sections are made up and the concrete construction formed in the .usual manner. Then additional sections are arranged above 4 the other sections, the lowermost sections being removed and `the construction completed in this manner. vThe construction illustrated is shown as employed for constructing a chimney which has an .upwardly tapering `conical outer wall 37 andan inner wall 35 which -llares slightly outwardly and upwardly. Owing to the flexibility of the plates 10 and the latitude for adjustment afforded, the form can be arranged to turn 'out a smooth and accurate construction such as illustrated. When the exterior diameter decreases sufciently, one plate 10 is omitted from the outer form, the latitude vof adjustment of' the plates permitting of this.

'While I have illustratedand described the vpreferred form of construction for carrying my invention into effect, this is capable of variation'and modification without departingfrom -the spirit of the invention. I, therefore, do not Wish to be limited toy the precisev details of construct-ion set forth, but desire to avail myself' of such variations and ations as come Within the scopeuof the appended claims.`

Having described my invention what -I claim as new and desire to secure by Letters latent is:

1. A concrete form comprising aplurality of plates offset and loosely overlapping at theirl side edges; cables encompassing said plates; and means for 'tightening said cables, substantially as described.

i 2, A concrete form comprising a plurality of 4flexible plates offset and loosely overlapping Aat their side edges; `-cables encompassingsaid plates; andV means for tightening said cables, substantially as described.V 3. A concrete form comprising a plurality of' plates -offset and loosely overlapping at their side edges; vertical stiffening bars on said plates, said bars fbeing outwardly offset at top and bottom; platesjplaced under said at top and bottom; plates placed under said v outwardly offset bar portions; cables enceinpassing said plates; and means for tightening said cables, substantially as described.

6. A concrete form comprising a plurality of flexible plates offset and loosely overlapping at their side edges; vertical stifening bars on said plates, said bars being outwardly offset at top and bottom; plates placed under said outwardly offset bar portions; cables encompassing said plates; and means for tightening said cables, substantially as described.

7. AA concrete form comprising a plurality of flexible plates offset and loosely overlapping at their side edges; vertical stiffer.- ing bars on said plates, said bars being outwardly offset at top and bottom; plates placed under said outwardly offset bar portions; steps -in the form 4of triangular loops secured to said bars; cables encompassing said plates passing above said loops; and means for tightening said cables, substantially as described.

8. A concrete form comprising a plurality of flexible plates offset and loosely overlapping at theirfside edges: vertical stiftening bars on said plates, said bars being outwardly offset at top and bottom; plates placed under said outward-ly offset bar portions; a plurality of hook members secured to the outer faces of' said bars; and securing bars placed in said'hoolfs, substantially as described.

lIn testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MARTIN STIELER.

Vitnesses:

JOSHUA R.Y H. Po'rTs, HELEN F. '-LILLis.

Copies of this -patent may be yobtained for five cents each, byaddressing .the .Commssioner of VPatents 'Washington, .`D..C.

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