Recent Patents
MOULDING BUILDING BLOCKS A patent for a machine for making concrete blocks, taken out by G. Chidger and R, Tanner, New
South Wales, is illustrated on this page. A presser head 17 is suspended by a rope from a loose pulley 23 which can be brought under the control of a hoisting clutch 25 or against the brake disc 28 when lowering the head.
When the mould frame 9 is filled the head 17 is lowered and repeatedly dropped to compress the material in the mould. The top is then raised into engagement with the latch hanger 19, and the toggle links 14 are folded by throwing over the lever 15.
The mould frame 9 is thus lowered and rests in slots in the bolsters 7, and the contents are exposed for rem oval.
METAL RE-INFORCEMENT A patent to increase the rigidity of the metal sheets for reinforcing concrete has been taken out by C. P. Curlewis, N.S.W. The metal sheets are slit and bent into longitudinal ribs, the ends of which are connected by uncut transverse portions of the sheets.
The transverse connections may be flat for nailing to studs, or bent to form holloAv sections C. The ends may be doubled and the shoulders of the ribs slotted at F to prevent fracture,
Permanent link to this item
https://paperspast.natlib.govt.nz/periodicals/P19160301.2.18
Bibliographic details
Progress, Volume XI, Issue 7, 1 March 1916, Page 577
Word Count
217Recent Patents Progress, Volume XI, Issue 7, 1 March 1916, Page 577
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