US1289109A - Concrete-pipe form. - Google Patents

Description

H. E. BURNS.

CONCRETE PIPE FORM;

APPLICATION FILED MAR. 30. 1911.

Patented Dec. 31, 1918.

L mas V r mggs "I: "nu "up: w, rnmunun wasnmnlau. u.

a citizen of the United States, residing at Chicagmin the county of Cook andState w S A EN OFFICE; T

CHICAGO, ILLINOIS, A conronn'r oiv or ILLInoIs. v

Toall'whotn it may concern..-

IBG it known thatI, HOWARD EL BURNS,

of Illinois, have invented a certain new and useful 1 Improvement in Concrete- Pipe Forms, of which the following 1s a full, clear, concise, and exact description, reference being'had to the accompanying draw: ings, forming a part of this SPGCIfiCatIOH -My invention relates to concrete pipe forms and has for its object the provision 1 of a pipe form consisting of anoutsideform and acore, together with instrumentalities for collapsing the core to P81111113, removal thereof fromthe finished concrete pipe and for changing the shape and size oftheform 'within certain .limitsto enablethe construction of concrete pipes of different sizes and shapes.

The device'of my invention consists generallyof an outside form composed of two main sections, each onesemi-circular I in shapearranged to be bolted,*or otherwise secured, togetherto form a circular form for the outside of a concrete pipe. The inside form isconstructed so that it may be collapsedto permit its removal after the concrete has set. To enlarge, the inner and outer-form I provide fillers which are in-- serted between the two semi-circular sec tions of the outer form. Inserts are also.

provided for the inner form so that it may also be enlarged to correspond with the outer form. These and other features of my nvention will be pointed out with greater "clearness in connection with the accompanying drawings whereln,

Figure 1 Is an end elevational view of the form of my invention, theform being ar ranged'to cast acircular pipe;

view taken'along the line 3-3 of Fig 2' Fig.2 s a view similar to 1 showing the form enlarged to" cast a pipe f larger cross sectional area than the pipe cast by Fig.1;

Fig. 3 is a horizontal cross sectional looking in the direction indicated by the arrows;

Fig. 4 is a fragmentary perspectlve view of a pipe produced by the form shown In Fig.2 and Specification of Letters Patent.

,"coNonETn-I'IP 'ronnt.

similar partsthroughout the several views.

. HOWARD nfnunivs, or CHICAGO, IL InoIs, ASSIGNOR To 0. I. MASSEY COMPANY, on.

' Patented Dec. 31, 1918. I Application filed March 30, 1917. Serial No. 158,601. I

Fig. 5 is a fragmentary perspective 3 Referring first to Fig. 1, Gdesignates the outside form and .7 the inside form. The

concrete pipeis formed in the space indi v cated at 8 between the inner and outer forms.

The outer form 6 consists of two sections 9 and 10, each, section comprising a metallic plate 11 havingreinforceing channel irons 12 attached thereto. The section 9 is provided along one of its edges with an angle iron 13 and alongits opposite edge with an angle iron 14. These angle irons are at. tached .to'thefmetallic plate ll by rivets, or

anysuitable means. I The base plate 11 ofthe section. 10 carries along one of its'edges an angle iron 16 and along its opposite edge anangle iron 17, the angle irons being attached to the base plate 11 in any suitable manner. The angle irons 113 and 16 are provided with apertures arranged to register with each otherand through which several bolts 18 are arranged to extend. The angle irons 14 and 17 are providedwith similar registering apertures through which the bolts 19 are permitted to extend.

;Therin'ner form7 consists of two plates 20 and 21, the plate 21 being provided along one of its edges with an angle iron 22', and the plate 20 withan vangleiron23. These angle ironsare provided with registering apertures through which bolts 24: 24 ex tend. Pivotally attached to each one'ofthe bolts24c,as most clearly shown in Fig; 3, is a plurality of arms 25.25, the inner end of eachv arm being pivotally attached at 26 to a T bar shown at 27. This 'Tbar is rigidly attached to a channel 28 one side of which is 'pivotally connected at 29 to the arms shown at 30. The outer end ofeach one of the arms 30 is providedwith the two bolts shownat 3131 which are arranged to register with. two of three apertures provided in the cooperating arm 32, there being one arm 32 employed for each arm 30. When the form is used for casting a pipe having a substantially circular cross section the arms 32 and '30 assumethe position illustrated inFig. 1 and are held in this position 'by the bolts shown at 3333 which extend rigidly carried bythe plate 120. similar pivotal connection is provided between the channel iron 28 and the angleiron 36 rigidly carried by the plate 21. I

angle iron 23 carriesa plurality of angleirons and the plate 21. isfprovided with-{- 7 similar angle irons, as shownat38. Interj posed between the edges of the plates 20land 21 is a filler 39"which' is; held 'in plac'efby suitable angle irons 4:0 bolted to the angleironsv3 7; and 38; The filler 3ecom rises the 'two strips'tl and 42, the former of which extends between the edges oi the plates 20 it I and 21, and the la'tter extends between-the and 38, as1nost clearly shown:

angleTironsg37 in Fig. 1;

In removing the outer form the-bolts and 19 are removed." To remove the inner, form it is necessary to' oollapsethe same and this .is vaccomp lished by detaching the fillep 39v from the angle irons '37 and '38; or by detaching'the filler'39f1'onrtl1e irons 38 andi; swinging the filler inwardly about the bolts connecting it WiththeironsST. The filler isthenremoved and the T bar 27 moved I from the positionishown in full lines in Fig. I 3 to the position shown in dotted lines; This" movement resultsg in movement of the arms- 1 25-+25 about their pivotjpoints 2 1-24 and anainward pull iongthe" free ends of the sec tiOns ZOaand 21; This/inward pull'on the free ends-of the" sections 20. and 2lnservesto contract the sections'sothat the entire inner f rm-maybe, removed; V

In the; casting of a concrete pipe which has a substantially elliptical :or. oval shape the: novel arrangement of inserts. shown in Fig. 2, isv e'mployedr, iTo enlarge-the outer form (ithe two inserts 43 and 44Jareput in place between the edges of the sectionsi9 and? 1 0.7 Eachiinsertflfconsists of alchannel' iron 451towhich-eis rigidly attached'a T bar 46V 1 provided 7 with apertures which register with: the apertures provided in other adjacent angle irons Ls'oythatv the bolts 47"47J may .be

utilized to ,hold the two sections, together with inserts, in place. To" enlarge the inner form v7 the sections are separated by freinov-,

ing, the bolts 24 and the, insert48} interposed f between the angle irons 23 and 22. This'in sert consistsnof achanne1-ironi49'and a bar 50 rigidly attached to the channel iron. The T bar containsapertnres which register with the boltaperturesin the angle irons and 22. vThe. sever-alarms 25are' pivotally attached to the bolts 31, as illustrated ;in'.Fig. .1 2,.- The several: bolts :31 are removed and" the arms 32moved from thepositions shown Fig.1 to the positionsshown in Fig. 2 so 1 that theinner two apertures of each one of;

The edge of the plate 20 opposite the the arms .32 register with the apertures in V theiadjacentarm 30,,Thej several arms 30 and..3 2.are thenconnected by the bolts 31;

a asillustrated, andtheinsert 39 put in place b'etweenthejfree ends of thep'lates 20 and 21.

Theme-ea 39issomewhat wider than the insert 39 shown in Fig. 1 and serves to give lthe inside form the required shape to pro- ,uce apipe having a substantlally. elliptical or oval shape.

ferent widths I amenabled to construct a or size within certain limits In order that the free ends ofthe sections 20 and121' of the By providing: number of'inserts of difconcrete pipe having practically any shape 7 inneriorm may be' pulled inwardly upon movement of the several arms 25 about their 1 partially flexible; 5

pivot pointsthe- sections 20 and 21 are made" Icla'im as new and desire to secure by Leta ters Patent of the United States is 1- :e-

1. 'In- E'pipe. form the combination of an inner; form consisting of two substantially sem1 clrcular'sectlons, means for connecting:

two of the longitudinal edgesof .said :sec-

Mons-together,- devices -attached to the 'secqf tions at points opposite the e connection of said sections for moving the, freeflends, of; said sections outwardly to expand the form; and a filler between: the free ends-of said sec-" tions.

2; Ina-pipeform the combinatioriof fan r inner form consisting of two substantially semi-clrcular sectlons; means for. connecting twoof the longitudinal edges pf said *sectionsrtogether, devices attached; to 'the 1 sec;

tions atzzpointsopposite; the connection of said-e'sectionsfor contracting the sectio'nsgto permit: removal of the innrijform; from the: pipe; and a filler between the free "ends: of I said section's; the-said fillerrbeiiig.vpivotally' securedtofoneof said sections: 7

l 3. ,In*a pipe'form'thecombination: of a" 7110 devices; provided 1 on the inside ofythe' cylin der and connected-thereto on opposite sides substantially circular split 'fornr cylinder,

of'the slit forieirpanding, and contracting the form,;;-and a filler arrangedv to, be. inserted 4 into the: 'slitbetween the free ends ofpthej form. V I p a, i

,7 4:; .Ina pipe form the combination of an 'inside formrconsisting of twov substantially semi-circular sectlons; means for; connecting,

saidsections together-along two of-th'ein lon- ,gitudin'al edges,- a-;.plura1ity ofrarms spaced "long tudinally, within the sections-and pivoted to the sections at points opposite thefree edges of .the sections: a bar pivotedlto the opposite-endsof said arms,- a plurality of farmspivotal-1yw connected between the bar andthe free ends of said sectionsyandza filler arranged -vto be inserted between the free ends Of sai-d sectionsi v '5. In a pipe form the combination'of an said arms, and a plurality of adjustable arms pivotally connected between the bar and the free ends of said sections.

6. An inside pipe form comprising a pair 1 of flexible semi-circular sections, means for connecting said sections together along two of their longitudinal edges, a filler pivoted to one of the sections along its longitudinal edge opposite the said connection, devices carried by the other section for locking the filler in place between the longitudinal edges,

of the sections opposite the said connection,

Copies of this patent may be obtained for andmeans for moving inwardly one of the ed es adjacent said filler.

. An inside pipe form comprising a pair of semi-circular'sections, means for connecting said sections together along two of their longitudinal edges, a filler pivoted to one of the sections along its longitudinal edge opposite the said connection, devices carried by the other sectionfor locking the filler in place between the longitudinaledges of the sections opposite the said connection, and

means for contracting the sections when the filler is swung inwardly about its pivot.

In witness whereof, I- hereunto subscribe my name this 21st day of March, A. D. 1917.

HOWARD E. BURNS.

Witnesses I A. G, MOGALEB, ROBE T F. ,BRACKE.

five cents each, by addressing the Commissioner of latentl, Washington, D. 0." p f

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