US1414288A

US1414288A - Core for concrete walls

Info

Publication number: US1414288A
Application number: US449145A
Authority: US
Inventors: Barney A Knudson
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-03-02
Filing date: 1921-03-02
Publication date: 1922-04-25
Anticipated expiration: 1939-04-25

Description

B. A. KNUDSON.

CORE FOR CONCRETE WAtLS.

APPLICATION FILED MAR. 2, 1921.

1,414,288, Patented Apr 25; 1922 M g/Amw y f UNITE "STATES TJ B ARNEY A; KNUDSON,'0E smv'm Annexat on-um.

-To all whom it may concern:

. Be it known thatI, BARNEY, A. KNUDsoN; a citizen of the United States, residing? at SantaAna, in the county of 'O ran'ge and useful Improvements in Cores for Concrete walls of whichthe following is a specification.

forms for concrete walls, the forms preferably'being such as described in my co-pending application Serial No. 404,217, filed August 17, 1920.

It is the specific object of the invention to.

provide a core which may be readily expanded and collapsed, so that after the wall has been formed around the core and between the forms, the core may be readily removed by collapsing the same. 1

The invention will be readily understood from the following description of the accompanyingdrawings, in which Figure 1 ma side elevation showing the method of using thecores in connection with concrete walls.

Fig. 2 is a transverse section showing a core and form inposition for use. n .Fig. 3'is a longitudinal-section through acore.

Fig. 4 is a top plan view of the same partly broken away.

- In the drawings I have shown the" cores employed in connection with forms for pouring concrete'walls, the forms preferably comprising uprights l and 2 received against the respective sides of a part ally completed wall 3 and supporting upri ht members 4 extending from one form to e next so as to provide a space into which the concrete forming the wallispoured; The

uprights 1 and 2 are preferably clamped in position by means of cross member 5 inter: mediate of the ends of the'uprights and by an upper cross memberfi, provided with a turnbuckle 7 for adjusting the same. The

longitudinally extending members preferably rest upon'lugs 8 and are held in position by catches 9. V

In order to form hollow spaces within the wall, cores constructed in accordance with the present invention are received in the space between the form members 4. These core members are shown as cylindrical memhers placed in upright position in the space I Specification of Letters Patent. Application mansion 2,

its ends overlapping as shown at; 11 -12 State of California, have-.invented newjand p st'ruction. ;A topj13 fits over this core con- I structlon and an- 1 annular depending flange I 1 of the top is bolted as shown at 15.130 It is the object ofthis invention to proe vide a core employed 'in connection with late curved upon itself to a circlewith itsv cone. non condemn warns.

i921. Serial No. 449,145.}

sists of a plate 10 'curvedf upon, itselfwith in order'lto P er-cylindrical comma.

one end of the plate 'The top is preferably conical in shape so that any of'the f Patented; I

between'the form memberspas clearly in Fig.3. Each of't-he core members'fconp jmaterialbeing poured, which m ay fall upon the same, will readilyflow down wardly into the space adapted toreceive the plast c materlal, A handle 16. is provided upon the top so .that'by twisting the handle the top andthe end of plate 10 secured theree j to may be shifted with relation to the opa pos1teend'11 of the plate for decreasing the diameter of the cylinder forming the l .75

core. By this arrangement the core may be either expanded or contracted in order to wall when formed.

permit of its insertion and removal from the L A100]: is, preferably, provided forretainf- "ing the core construction in expandedposition, saldlockl ng mechanism comprising a bar 20 adapted to extend diametrically? v ztcrossQthe opening in; the core and having an upwardlyextended earpivoted' at 21 just above alined openings 18 and 19in the overlapplng ends .11 and 12, so that when the 21 will extend through the openings and the opposite end of the "bar will press against the opposite side of the core and expand a handle upon its upper end for operating the bar 20. When the handle is. pulled up wardly-the free end of the. bar. 20 swings V I I upwardly out of engage'mentwith the core vbar swings downwardly to a horizontal position the end of the barflbeyond the pivot and the'other end withdraws fromth'e

openings

18 and 19,and the core collapses sufli-fl'loo 1 ciently to be drawn out of the concrete. The,

pressurefor expanding the core is exertedf' i i against the pivot 21] pushed downwardly.

..Various changesmay be made without de- What isclaimedis:

when-the bar 20 is parting from the spirit of the invention as claimed.

7 extends when in: a horizontalposition and the opposite end of the bar being adapted to engage the opposite side of the core and core to its normal position, and apull rod expanded against I name to this specification; exert pressure upon the pivot to expand the connected to the free end of the bar and extending upwardly through the top, sothat I through the alined'openings to hold thecore the pressure of the'concrete.

In testimony whereof BARNEYAJ KNUDsoN-Q g V '30 I have signed 5) ,e