Fig. 3110.

Fig. 3111.

The mechanism for traversing saws 2 and 3 corresponds in design, and may be described as follows:

The arbor a has a spline s to drive the sleeves d, d′, which hold the saws and are carried by arms e, e′, which operate in slideways and have racks f, f′, into which gear pinions whose shafts g, g′, are operated by the hand wheels h, j.

It is obvious that by means of the hand wheels h, j, saws 2 and 3 may be regulated both in their distances apart or in their distances from saw 1, while the machine is in full motion, the bushes or sleeves d and d′ being carried by and revolving in the slide pieces or sliding bearings e and e′ respectively. Now suppose that e′ be moved to the left by hand wheel j, until it abuts against the end of d, at the slide end, and a further movement of d′ will also move d, causing it to operate its pinion and revolve the hand wheel h, hence d and d′ may be simultaneously moved without disturbing their distances apart by operating hand wheel j. On the yoke above the saws is a coarse-figured register plate to enable the setting of the saws to accurate widths apart.

RACK FEED SAW BENCH.

This machine is employed for the purpose of reducing balks or logs into planks of any thickness required. The machine is fixed on the floor of the saw mill, all the gearing being underneath the floor, so that the table may be set level with the floor, which is a great convenience when heavy logs are to be operated upon. The machine consists of a substantial bed plate or frame a, [Fig. 3112], carrying the saw and the feed works. The carriage runs on rollers, some of which are fixed to the frame a, and others to the framing timbers b, which are long enough to support the carriage throughout its full length, when the carriage is at either end of its traverse.

VOL. II.RACK‑FEED SAW BENCH.PLATE XIX.
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Fig. 3112.