Patent GB-702538-A (GB)
Title: Improvements in or relating to shuttering for use in constructing chimney and other structures out of concrete or like material
Inventor: O'SULLIVAN EUGENE
IPC: E04G13/00
Filed: 1951-01-19
Abstract: 702,538. Shuttering for casting fireplace and chimney breasts. ONSITE EQUIPMENT, Ltd. Aug. 1, 1951 [Jan. 19, 1951], No. 1520/51. Class 20 (2) In shuttering e.g. for casting fireplace and chimney breasts in association with fireplace and flue cores, shuttering plates have welded to their side edges tubular uprights adapted to receive inner tubular members for the alignment of superposed shuttering plates. As shown in Fig. 1 the shuttering is in position for forming a pair of fireplaces and chimney breasts on opposite sides of a cavity wall 1 and comprises on each side lower and upper plates 2, 3 and side plates 4, 5. The plates 2, 3 are formed of sheet steel or aluminium and have their vertical edges 6, Fig. 2, bent at right angles and welded to tubular uprights 7 which are also welded to the ends of horizontal reinforcing channel members 8, 9, 10. These uprights 7 receive inner tubular members 32 of approximately the same length which are supported in the uprights of the lower plate 2 on cross pins or on half-length inner members so that they project for about half their length and form spigots on which the tubular uprights 7 of the upper plate 3 are engaged. Further upper plates and inner tubular members 32 are erected as required, the latter being supported on the upper ends of the previously erected inner members 32. Each plate 2, 3 has adjacent each corner a socket 12 welded to the upright 7. The side plates 4, 5 are not provided with tubular uprights, the vertical edges of these plates being reinforced by channels 19, and horizontal reinforcing channels 20, 21, 22 also being provided. Pairs of hooks 24, 25 are welded to the plates 4, 5 adjacent the upper and lower channels 20, 22 and are adapted to engage locking bars 34, 33 which pass through openings formed in the wall 1 and have downwardly extending pins at their ends adapted to engage in the sockets 12 on the front plates on opposite sides of the wall 1, thus securing them together and retaining the side plates 4, 5 in position. Fireplace cores are inserted in the lower section of shuttering and various sections of flue core are fitted as required at the appropriate stages. Alternatively earthenware or other flue linings are inserted and left in position in the concrete. Strips 40 of expanded metal may be embodied in the previously formed wall 1 to form a secure bonding with the fireplace and chimney structure. Alternatively a complete fireplace &c. structure may be erected initially after which the wall is built to abut against the sides of the structure, in which case single side plates of a sufficient width to extend from one front plate to the other are used. In a modified arrangement, Figs. 6, 7 (not shown), the shuttering and associated cores 79 are used for forming four fireplaces with their flues located in the corners of four separate rooms. In this arrangement all the shuttering plates have tubular uprights along their side edges, the plates 52, 54 on one side of a wall 78 being connected to the plates 51, 53 on the other side, pending the erection of the next course of shuttering plates, by ties 77 formed with downwardly projecting studs engaging the ends of the tubular uprights. Sockets 67, 74 and hooks 68, 75 are provided on the plates 53, 54 to receive short locking bars 71, 76 which also engage sockets 59, 61 on the tubular uprights of the plates 51, 52. By a modified arrangement of sockets, hooks and locking bars, the plates, Figs. 6, 7 (not shown) may also be used for forming a pair of fireplaces &c. back to back. Specification 632,524 is referred to.