US1287573A

US1287573A - Concrete-form.

Info

Publication number: US1287573A
Application number: US2006115A
Authority: US
Inventors: Harry O Davidson
Original assignee: HYDRAULIC PRESSED STEEL Co
Current assignee: HYDRAULIC PRESSED STEEL Co
Priority date: 1915-04-08
Filing date: 1915-04-08
Publication date: 1918-12-10
Anticipated expiration: 1935-12-10

Description

H. 0. DAVIDSON.

CONCRETE roam.

APPLICATION F'LED APR-8,1915- 1,Q57,573; Patented Dec.10, I918.

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H. O. DAVIDSON.

CONCRETE FORM.

APPLICATION FILED APR. 8; 1915.

1,287,573. Patented De0.10, 1918.

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CONCRETEJEORM.

, S-pe'cificati'ou'of Letters Patent.

Patented Dec. 10, 1918.

Application filed'npril s, 1915. Serial m. 20,061.

To all 207mm it maycomem Be it known that I, HARRY O. DAVIDSON, a citizen of the United States, residing at Cleveland Heights, in the county or Guyahoga and State of Ohio, have invented a certain new and useful Improvement in Concrete-Forms, of which the following is a full, clear, and exact-description, reference being had to the accompanying drawings.

This invention relates to forms for molding concrete, and more particularly to forms that are employed for the purposeof roducing cylindrical objects, such as silos. It is the general purpose of the invention to produce a form of this kind which can be readily assembled and disassembled and which is readily adjustable wher'eby changes in curvature may be conveniently accomplished. Further and more limited objects at the invention will appear hereinafter in connection with the detailed description. In the drawings forming part hereof, Figure 1 represents a view, partly in plan and partly in transverse section, of a silo mold constructed in accordance with my invention; Fig. 2 a detail in perspective of a the interior of the mold; Fig.3 a, vertical sectional viewtthiough the mold; Fig. 4a sectional-detail illustrating the manner of clamping the innerfmold plates; and Fig. 5 a sectional detail illustrating the manner of securing the liners to the uprights.

The form comprises generally a plurality of upright posts or ribs which form a support for the inner plates of the mold and means associated with such uprights for clamping the plates thereto; also a plurality of plates which may be connected to fo1"m the outer shell of the mold,. both the inner and the outer plates preferably being flexible whereby their contour may be changed to produce jcylindrical or segmental objects of varyingdiameter; and also horizontal liners which connect the upright posts or ribs. I I v Describing by reference characters the various parts illustrated herein, A denotes generally a plurality of upright posts which support the inner plates of the mold, indicated generally at B. These upright posts A. are connected by means of the liners C, said liners being made each of av pluralityof curved segments which are adapted to telescope-at their ends. D denotes generally the inner portion of the chute for the ensilage, this chute being of tunnel form in section and being provided with a special arch-shaped vertical series of plates E.

The outer shell comprises a plurality of curved plates F which are provided with means whereby they may be united to form a segmental or cylindrical wall surrounding the corresponding inner mold wall and having a special curved plate G cooperating with the plate E to form therewith a mold for the ensilage chute. The inner plates maybe shifted upwardly by hand after each ooiirse of grouting has set, but. the outer series, being joined together, will be lifted awholeand, for thispurpose, derricks ndicated generally at-H) are carried by the posts "or ribs'A and are provided with theasual blocks and falls for the purpose of lifting the outer wall.

. 'Thefp'osts, indicated generally at A, are formed of two metallic members-one of which is substantially channel-shaped iin se'tition and comprises a substantially fiat Web l'having divergentsides 2 terminating in out turned flanges 3, these fiangesbeing united by the second member 4 which is connected thereto, These posts are made in suitable lengths which lengths may be connectedto form a postof any desired height,

as by "means of the channel splices, Ksee Figs. 2 and 3. 'These chani'iel splices are shaped to receive therewithin the abutting end portions of the post members and may v i be connected thereto by means of bars 5 which ma be identical with the bars shown in Fig. 5, said bars. having each a body which is conveniently, formed from two metal straps suitably joined together and each having a bottom flange, as shown at 6, whereby a foot is provided. This foot may be inserted into the post through the enlarged portion of one of the key hole slots 7 with which the posts are provided, the

thereto. Each plate isshown as provided at each lateral edge with a metal plate ex-' tension which is bent to conform to one of the tapered sides of the post A and to seat upon the flange 3 thereof. 8 denotes the part of this plate extension which 0061)- erates with the inclined side of the post adj acent thereto and 9 the part which is adapted to engage the flange 3. 10 denotes the portion of this extension which is secured to the body of the plate B. It will be noted that the parts are so proportioned that, when the portion 9 is in engagement with the flange 3, a portion 8 will be substantially in engagement with the side of the post and the plate B will be in substantial alinement with the plate 1.

To secure the mold plates to the post, I

may employ a yoke 11 the ends whereof are adapted to extend on opposite sides of the post and to engage the parts 9 of the mold plate extensions. .This yoke may be secured in place by means of a bar 12, which may be similar to the bar 5 except that it has two pairs of feet 13 and 14; projecting therefrom, the first mentioned pair being adapt-ed to engage the inner face of the web 1 when the yoke is in its clamping position, indicated in Fig. 1, and the second being adapted to engage the inner face of the web when the yoke is withdrawn and turned at right angles to the post so that its ends or feet engage said post. The yoke is locked in either of these positions by means of the wedge key 15. This construction of yoke and clamping bar is shown, described and claimed in the application of Stewart R. McKay No. 872,648 filed November 17th, 1914. The plates B, as stated hereinbefore, are of metal, but are sufficiently flexible or resilient to permit them to be bent more or less without injury, thereby accommodating these plates to silos or similar bodies of varying diameter. A sufficient number of these plates and posts will be employed to produce a segmental body, leaving a space for the chute.

I prefer to form the inner wall of the chute mold in the manner shown in detail in Fig. 1. B denotes a pair of short angular plates the ends whereof are connected to the posts which are adjacent to the chute opening and to a pair of posts A, which are.

identical with the posts A but are located within the chute opening or extension with their backs or webs 1 opposed to each other. Because of the absence of liners from the chute portion of the form, the posts A are braced apart by means of struts 16. B de notes an arch-shaped plate the ends whereof are connected to and supported by the ribs A in the same manner as the ends of the plates B are connected to and supported by the posts A. This arch-shaped plate is provided with suitable strengthening ribs 17 and with inclined braces 18 connected to the arched and end portions of this rib.

Reference has been made to the liners C. A suitable number of these liners will be employed for the purpose of supporting and properly alining the posts or ribs A. Each liner consists of a plurality of segments, each segment being shown as of channel shape having the flanges 19 presented inwardly or toward the center of the mold while the web 20 is adapted to engage the posts or ribs A. These liner segments may be recessed, as indicated at 21 Fig. 5, to 0061)- erate with the posts A, and may be secured in place by means of the bolts 5 and wedge keys 7 which cooperate each with thrust plates 22 of channel shape which may be spotwelded to the liner (either to the inside or the outside thereof) and in line with the recesses 21.

As previously stated, the inner portion of the mold will be shifted, plate by plate, from a lower to a next higher level, after the grouting has set or hardened sufficiently. It is intended, however, to lift the outer mold section as a whole or unit. This outer section will now be described. It is composed generally of a series of plates F each having at its lateral edges angle irons 24: whereby adjacent plates may be connected by means of bolts 25. Each plate will preferably be provided with a ring 26 which is adapted to receive the hook of a fall. The plates F are sufiiciently resilient or flexible to en able them to be used in forming the outer sections of molds of varying diameter. If the plates were heavy and rigid, the curva' ture initially given to them could not be altered and, if the number of plates constituting the outer mold section were increased or diminished, a corresponding distortion of shape in the mold would result. By making these curved plates flexible or resilient, a greater or less number of plates may be assembled, but the circular or cylindrical contour can be preserved. because of the resiliency of the plates.

A sufiicient number of plates F will be employed to form the outer shell of the mold, with the exception of the chute portion. This chute portion is provided by a special plate G, the central portion whereof is bent outwardly into arch form while the lateral edge portions thereof are outwardly concaved or reversely curved, as shown at 27. The plate G is provided with the angle irons 24: at its lateral edges whereby it may be secured to the angle irons carried by the lateral edges of the adjacent plates F. Tn order to give the proper shape to the chute portion of the outer mold shell or wall. turnbucklcs 28 are employed, each having one end connected to the arch portion of the plate G and its other end connected to a portion of the adjacent plate F. It will be evimemes dent that, by adjusting; this; tttrnbuckle, the curvature of the portions 27' may be: variedand that thereby it is possible to; produce a chute of substantially the same shape} and appearance silos of widely varyiiig diameter.

The key-holeslots withwhieh the-posts A are providedform a veryconvenient nieansffor sup-perting the brackets which carry the platforms torthe orkinent, Each bracket is! sholwn: as corn-prising: an apperhorizontal branch 2.9 lihdva lower inclined branch or brace 30- with an interposedxstrut lhebranches 29 and 30 will be. p v'ifded with suitable lugsyhaving heads which are adapted to enter the. enlarged portionsot a pairof the vertically spaced-keyhole slots and to enable the brackets te be interlocked with the post by gravity theheads engaging the narrow bottom portions of the slots as the weight of the bracket, carriesmeansof the same-splice-elza-rizp K that is.-

cnrployed for uniting the other post sections.-

The horizontal arm 34: of the derrick extends across the top of the form and carries. a block 35,- the fall 36 whereof is. shown as:

provided with a hook 37. -Wh en these hooks are inserted into the appropriate rill-@4261, the outer mold section may: be raised as a whole to the next level. and may be sup ported by the derricks until the next sue ceeding operation.

Having thus described my inventiomvthat I claimis::

1. In a form of the character described, the combination of a series of posts, a pair of posts offsetfrom said series and located respectively adjacent tothe first and the lastpost of the series, curved plates independent of the posts extending between and adapted to be secured to the posts in said series-and forming a segmental wall, plates extending between the first and last postsof the series and the ofi'set posts, and a plate extending between and connected to the ofiset posts;

In a form of the character described, the combination of a series of posts,- a pair of posts o fiset froni saidserfiesrand located respectively adjacent to the first and the last post of the series, plates independent of the posts extending between and adapted to be securedto the posts in said series and formiug a; segmental wall, and a curved'plat'eex tending"- between and connected to the pair of ofi sot posts.

= 3. In a form of the character described, the combination of a series of posts arranged substantially circular sfdrniatione plates independent-0t said; postsandinterposed between-allot the postsexcept' the first and the last. postof the series, an outwardly curved plate interposed between the first and the last: post. of the series, the said plates. and posts constituting an inner mold wall havingan outwardly projecting chute or chambe-rbetweensuch first and lastposts, and an outenniold wall surrounding the inner wall and having a. curved section corresponding to the outwardly curved plate between the first and the last. post of the series.

In .a form. of'the character described, the. combination of a series of posts, a pair of posts ofi 'se't froinsaidseries and located respectivelyadj acent to. the first and the last postof: the series, curved: resilient plates extendingbetween and secured to the posts of said seriesqand forming; a segmental wall, an angular plate having one branch secured to the first post of 'the series and itsother branch secured to the adjacent oifset post, a secondangular plate having one branch seortredto the; lastcpost: of said series and its other branch secnred'to the other ofiset: post, anda-ccnrvedplate having its ends secured to said ofi'seti 5.111 a form of the. character described, the combination of a series: of posts, a pair oiiposts; efiset from said series and located respectively adjacent to, the first and the last post of the series, plates extending between theposts orsaid series and forrnin a segmental wall, bent plates extending ietween the and the last; posts of the series: and the offset posts, a plate interposed between said offset posts.

(t .Ina-fornr of the character described, the combination of a series of posts, segmental curved liners. connected tosaid posts, c-umved resilient plates interposed between said posts an'd a series of curved resilient plates connected together at their lateral edges and surrounding and spaced from the said posts and th'e first mentioned series of plates, s l v 7 a form of the character described, the combination of a series of posts, curved plates independent oi the posts interposed between and secured to the posts of said se ries,-= pair ofiposts offset from said series and located respectively adjacent to the first and the last post of the series, plates interposed" between the and the last post of the'series and the ofi'set' posts, a curved plate interposedi between the offset posts, and bracesor struts interposed between said offset posts.

82 In 'a form of the character described, the combination of a series of posts, resilient curved plates independent of the posts interposed between secured to the posts of the series, pair of posts offset from said seriees, and located respectively adjacent to the and the-lasttpost; of; such series, bentplates interposed between the first and the last post of the series and the offset posts, an arch shaped plate interposed between and having its ends connected to the ofi'set posts, and braces or struts interposed between said otlset posts.

9. In a mold of the character described, the combination of an inner mold member comprising a series of posts and a series of curved plates connected to said posts and adapted to form a segmental body with a lateral chute projection, and an outer mold member comprising a series of curved resilient plates having their lateral edges connected and arranged substantially concentric with the inner series and having a chute projection spaced from the corresponding projection of the inner mold member, and means connected with such chute projection of the outer mold member for varying the cont-our thereof.

10. In a mold of the character described, the combination of an inner mold member comprising a series of curved resilient plates arranged to form a segmental body with a lateral chute projection, vertical posts supporting the lateral edges of said plates, an outer mold member comprising a series of curved resilient plates having their lateral edges connected and arranged substantially concentric with the inner series and having a chute projection spaced from the corresponding projection of the inner mold member, and means connected with such chute projection of the outer mold member for varyin the shape thereof.

11. In a mold of the character described, the combination of a pair of mold plates, a resilient plate interposed between said plates and having a portion projecting out of the line of said plates, and adjustable means connecting the projecting portion with the first mentioned plates whereby the contour of such portion may be altered.

12. In a mold of the character described,

the combination of a pair of mold plates, a

resilient plate interposed between said plates and having an arch portion projecting out of the line of said plates, and adjustable means connected between the arch portion and the plate whereby the contour of such portion may be altered.

13. In a mold of the character described, the combination of a segmental mold wall, a resilient plate interposed between the ends of said wall and forming one of the mold walls for a' chute, and means for varying the contour of such chute wall.

14. In a mold of the character described, the combination of a pair of curved plates, a resilient plate interposedbetween the first mentioned plates and having its central portion projecting beyond said plates and connected thereto by a reversely curved portion of such resilient plates, andmeans adjust ably connecting such projecting portion with the first mentioned plates whereby the curvature of the projecting portion may be varied.

15. In a mold of the character described, the combination of an inner member comprising a series of curved plates arranged to form a segmental body with an arched extension, an outer mold member comprising a plurality of curved plates adapted to be arranged substantially concentric with the circular portion of the inner member, the outer member having a resilient plate shaped to form an extension spaced from the extension of the inner member, and means adjustably connecting the sides of such projecting portion with the curved plates adjacent thereto.

' 16. In a. mold of the character described, the combination of an inner member comprising a series of curved plates arranged to form a circular body with a chute extension, an outer mold member comprising a plurality of curved resilient plates adapted to be arranged substantially concentric with the circular portion of the inner member. the outer member having a resilient plate adapted to form a chute extension spaced from the chute extension of the inner member, and means adjustably connected to the sides of such outer chute extension to vary the contour thereof.

17. In a mold of the character described, the combination of an inner member having a circular portion and an outwardly projecting extension arranged to form the inner wall of a chute. an outer member having a circular portion adapted to be placed substantially concentric with the circular portion of the inner member and'having aresilient plate with its central portion projecting outwardly to form the outer wall of a chute the lateral portions of said plate being concave, and means adjustablv connecting the outwardly projecting sides of the last mentioned plate with the circular portion whereby the concavity of the lateral portions of the intermediate plate may be varied.

18. In a mold of the character described, the combination of a pair of spaced plates, a resilient plate interposed therebetween and having a central portion which is out of line with such spaced plates and having concaved lateral portions extending between the central projecting portion and such adjacent plates, and means adjustably connected with each side of the projecting portion of the intermediate plate and one of the adjacent plates and extending across the concaved portion of such intermediate plate.

19. In a mold of the character described, the combination of a pair of spaced plates. a resilient plate interposed therebetween and raving a central portion which is out of line with such spaced plates and having concaved lateral portions and adjustable means for varying the concavity of such lateral portions of said resilient plate.

20. In a mold of the character described, the combination of a pair of spaced plates, a resilient plate interposed therebetween and having a central portion which is out of line with such spaced plates and having concaved lateral portions interposed betweenthe central projecting portion and such adjacent plates, and turn buckles connected with each side of the projecting portion of the intermediate plate and one of the adjacent plates and extending across the concaved portion of such intermediate plate.

' 21. In a mold of the character described, the combination of a post having a lateral flange and a tapered side, a mold plate having a lateral extension which is adapted to conform to said tapered side and to said lateral flange, and means carried by the posts for clamping the flange-engaging portion of such extension against said flange.

22. In a mold form of the character described, the combination of a hollow post having tapered sides and laterally projecting flanges, a pair of mold plates each having a lateral extension one portion whereof conforms to the tapered face of the post and another portion whereof conforms to and is adapted to. engage the adjacent lateral flange of said post, and clamping means carried by the post and adapted to engage the flange engaging portions and the lateral extensions of the said plates.

In testimony whereof, I hereunto aflix my signature in the presence of two witnesses.

HARRY O. DAVIDSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.