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Publication numberUS1145228 A
Publication typeGrant
Publication dateJul 6, 1915
Filing dateDec 14, 1911
Priority dateDec 14, 1911
Publication numberUS 1145228 A, US 1145228A, US-A-1145228, US1145228 A, US1145228A
InventorsRobert O Blayney
Original AssigneeRobert O Blayney
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Mold for tubular concrete structures.
US 1145228 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)




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Patented July- 6, 1 915.



Patented July '6, 1915.

2 swans-sum 2.

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wiineisfi Inventor.


'NEY, a subject of the King of Great Britain,

' supporting legs in Fig. 5 is a view' Tubular Concrete mold ROBERT o. IBLAYNEY,

To all whom it may concern:

Be it known that I, ROBERT OSCAR BLAY- resident of the city of Niagara Falls, county of- Welland, Province 'of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Molds for Structures; and I do hereby declare that the following is a full, clear, and exact description of the same.- I I The invention relates toimprovements in forms for tubular concrete structures, as described in the following specification and illustrated in the accompanying drawings that form part'of the same.

' The invention consists essentially in the novel "construction and arrangement of parts, wherebya plurality of separable plate segments are secured together and supported to form a mold.

I The objects. of the invention are, to facilitate the work of building concrete conduits effecting a saving of time and labor and thereby reducing expense, and to devise a mold formed of a plurality of separable segments which may be taken down and carried through the core without interfering with the advanced portion of the mold, thereby enabling the work to be carried on continuously with 'a minimum outlay of capital and insuring a thorough bond throughoutlthe entire structure. -In the drawings, Figure I is a perspective view of aportion of mold set up in position. Fig. 2 is an enlarged cross sectional View through one of the wedged joints of the mold showing one of theadjustable part longitudinal section. Fig. 3 is an enlarged elevational face view of one of the center brace connections. Fig. 4 is a diagrammatic plan-view of a portion of a conduit mold arranged for a bend.

showing a means of reinforcing a joint. Fig. 6 is'ai detail view of one' of' the annular wedges employed in adapting the mold for forming a curved conduit section. Fig."7is a detail illustrating the manner of connecting the outer ends of the core supporting arms with the plates of the core. 7 j

Like numerals of referenceindicate corresponding parts in each'figure.

eferring to the drawings, 1 is a base which may be of concrete built in to the trench or other place where the conduit is ,AT a j or NIAGARA FALLS, ONTARIO, CANADA.

Specification of Letters Patent.

Application filed December 14, 191 1.


Patented hi a, 1915.2 Seria1No.665,741.' m-

to be laid or itmay merelyrepresent the ground on which the conduit is to be built;

2 are adjustable leg members, each comprising the threaded rods, 3, tubes 4 and 'eye rods 5, adapted to rest at their outer ends inthe'foot members'6 andto be secured at their inner ends to a coupling "member '7,

having suitable bolts extending therethrough and through the'bolt holes 8 in said coupling member." The coupling members 7 are formed of a pair of segments adaptedto be clamped together around a central tube or rod 9 being held together by the bolts 10 and having the bolt holes 8 arranged in the protuberances 11. i l

12 is the mold rality of plates 13, each having their four edges turned inwardly and: adapted to 'fit together to form sections of the desired cross sectional shape which sections are in turn secured together by suitable bolts, the bottom section 14 and the two lower side sections 15 are so formed that longitudinal channels 16 are 17 and 18 are longitudinal wedge mem bers arranged in pairs andclosingthechan nels 16, being drawn tightly intofpla'ce by suitable bolts extending 'through the' plate flanges and through 'suitableholes in-fs'aid wedges (see Fig. 2). The leg members 2 project through suitableorifices-cut "in the wedges 17 or '18 and support the rod 9centrally of the core, the said core beingsup ported upon the adjustable arms 20 formed of a similar construction to the said leg.

members and secured at their inner ends. to the couplings 7 and at their outer endsto the flanges ofthe platelmembers asshown in Fig. 7. It will be seen from this ,de-]

soription that the coremay be solidly sup-f ported a uniform distance from the bed the members 2 being used at frequent intervals but not necessarily attheend of each sec tion. The outer casing 21 of the, mold is formed of a I outturned flanged edges adapted to be .secured together and the core by suitable separators 23" in the form of short length of pipe surrounding the securing bolts.

supported in any suitable manner. An

10b. plurality *ofplates 22 having suitably supported from i The lower plates 24 are opening 25 is left between the side portions of the outer casing for the placing of" the concrete to complete the structure.

In Fig. l, I show diagrammatically a number of sections of the outer casing of the pipe secured together to form a bend. In order to utilize the ordinary sections used in straight pipes I construct a number of wedge shaped members 27 of annular form adapted to fit between the flanged ends of the casing segments and to be bolted in place. These wedges are formed in segments.

Any desired number of the above wedges formed at any desired angle may be used in order to swing the conduit to the required curve.

It will be seen that the pipe may be curved in either direction for any distance desired by the use of such construction, corresponding wedge shaped members being used in the core member. In the diagrammatic plan View of this embodiment of the invention, one of the annular wedge shaped spacing members is shown in section.

In the use of this device, the bed is first prepared and the several segments are secured together in the manner shown and described, the longitudinal wedge pieces being preferably arranged to each side of the lower central segment. The adjustable arms are then connected to the collars on the center rod and to the several segments, the leg members 2 being arranged to extend through suitable holes in the wedges. Any desired number of rings thus formed may be secured together to form the core, being supported at suitable intervals by the projecting legs resting upon the foot members in the bed The lower segments of the outer casing are then placed in position, suitable spacing bolts with pipe collars extending between the casing being used to support the said outer casing and hold it in its relative position in relation to the core. The concrete is then poured into the mold so as to fill around underneath the core and up the sides. The outer casing of the mold is added to from time to time as the filling-in progresses until the last of the concrete completing the structure is placed between the two top plates. When the full amount of concrete is placed in position and becomes sufliciently hard, the mold at the end where the work is started may be taken down from the underside, the legs being disconnected from their connecting collars and drawn inwardly and the longitudinal wedges loosened. The segments are then taken apart and carried through the form and connected up to the farther end of the mold.

In small work say up to six foot diameter I dispense with the leg supports and adjustable arms and reinforce the wedge joints by means of a suitable bridging shown in Fig. 5 in the form of a strap bar 28 secured to Copies of this patent may be obtained for five cents the end flanges of two of the segments and bridging the joint on the inner-side thus giving a perfect rigidity to the whole structure.

With the use of a mold such as described the work of construction can be carried on continuously without interruption, as the sections may be taken down one at a time and carried through the succeeding forms so that the work of filling in the concrete need not be interfered with.

What I claim as my invention is 2- 1. In a mold for tubular concrete structures, the combination with a plurality of plate segments having inturned radial edge flanges adapted to be temporarily secured together to form a core, of pairs of longitudinal wedge members arranged between the longitudinal flanges of the lower segment and the adjacent segments bolts extending through the said wedge members and the engaging flanges, threaded rods extending through said wedge members and forming leg supports, tube members threaded on said leg supports, eye rods threaded in the inner ends of the tubes, a coupling member secured to said eye rods, adjustable arms secured to said coupling member and extending radially outward and secured to the inner side of the core, and an outer shell spaced from said core and completing the mold.

2. In a mold for tubular concrete structures, the combination with a core formed of a plurality of plate segments temporarily secured together, of a center rod, coupling members clamped on said center rod, longitudinally adjustable leg members secured to said coupling members and extending outwardly through the wall of the core and forming adjustable supports for said core, adjustable arms secured to said coupling members and extending radially outward and supporting said core, an outer shell spaced from said core and completing the mold, and spacing members arranged between said core and outer shell.

3. In a mold for tubular concrete structures, the combination with a plurality of plate segments having inturned radial edge flanges adanted to be temporarily secured together to form a core, of a bridge member adapted to be secured at the ends to the inner sides of the end flanges of said segments and having an arched central portion adapted to bridge the adjacent longitudinal side flanges of said segments.

Signed at the city of Niagara Falls, this 7th day of December 1911.

ROBERT O. BLAYNEY. lVitnesses:


each, by addressing the Commissioner of Iatents,

. Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3180000 *Dec 22, 1961Apr 27, 1965Josef BossnerFormwork for manufacturing prestressed hollow concrete bodies
US3733045 *Feb 18, 1971May 15, 1973Kaiser Aluminium Chem CorpApparatus for lining rotary kilns
US4384839 *Apr 16, 1981May 24, 1983Sekisui Kagaku Kogyo Kabushiki KaishaCore mold for bent pipes
US4484724 *Dec 22, 1982Nov 27, 1984James SrackangastForming element and forming apparatus for casting manhole inverts
US4867411 *Aug 28, 1987Sep 19, 1989Valley Blox, Inc.Manhole invert casting system
U.S. Classification249/11, 249/184, 425/DIG.107
Cooperative ClassificationB28B7/168, E04G11/02, Y10S425/107