PATENT ORE CRUSHER.

Progress, Volume I, Issue 4, 1 February 1906, Page 78

PATENT ORE CRUSHER.

Messrs. A. & T. Burt, Limited, engineers, have recently turned out of their Dunedin workshops a very powerful ore crusher, designed by Mr. G. Calder, proprietor of the Valley quarries. The crusher is a distinct advance on any type of stone breaker at work in New Zealand. The design embodies the best features of imported machines, with improvements which Mr. Calder has carefully thought out in his long and extensive experience with ore-crush-ing machines The most important improvements consist of the double-acting cam motion, giving two crushing strokes to each revolution in place of one, as in other reciprocating machines , also the lever operated by the cam shaft is of great length, which the design readily permits, thus giving a very low and economical horse power to drive the crusher at full capacity. In daily work the machine pats through 15 tons of road metal per hour, the mouth opening being 12m by 18m. Generally, the machine is well proportioned in all details, first-class materials and workmanship characterising its construction. The mam frame is a massive casting weighing over 4 tons, which, being self-contained, does not require expensive foundations This new crusher should commend itself to all users of this class of machinery. Messrs A & T. Burt, Limited, who are the sole agents for this patent crusher, would be pleased to arrange for those interested to inspect and view the machine nt work m Mr. Calder's quarry.