. Canadian forest industries January-June 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Difficulty is often experienced in operating sawmill carriages in the endeavour to obtain evenly sawn lum- ber, which trouble is often attributed to the saws not running true, or to incorrect work on the part of the setter, when possibly neither of these are at fault, but is caused from lost motion in some of the various con- nections in the mechanism of the set works or in the offsetting device of the taper movement of the head blocks. After considerable
. Canadian forest industries January-June 1922. Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries. Difficulty is often experienced in operating sawmill carriages in the endeavour to obtain evenly sawn lum- ber, which trouble is often attributed to the saws not running true, or to incorrect work on the part of the setter, when possibly neither of these are at fault, but is caused from lost motion in some of the various con- nections in the mechanism of the set works or in the offsetting device of the taper movement of the head blocks. After considerable experimenting MacLean's Patent Receder was eventually produced which is so simple and yet so completely satisfac- tory it should be applied to every saw- mill carriage. It has been in success- ful operation for two years with most satisfactory results. The device is particularly to be re- commended where steam setters are in use on account of the strain and wear producd on the working parts of the carriage, causing lost motion to develop very rapidly on these parts, but is equally effective for either steam or hand-set, as there are dif- ferent styles of the appliance for steam and hand-set works and can be applied to any make of carriage with very little expense. For lighter set works that are not powerful enough to set against the tension of the spring of this device as shown, an alternative device can be supplied which is also covered by this pat- ent. The spring causes no strain on the set works but effectively prevents any slack motion in the rack and pinion or taper movement. The spring in this case is attached one end to the end of the rack and the other end to the head block knee. These devices are covered by Patent 198967, and have given most satisfactory results wherever Prices and all information gladly given upon request. William Hamilton Co., Limited Agents: J. L. Neilson & Company, Winnipeg, Man. PETERBORO, ONTARIO. Please note that these images a
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectforests, bookyear1922
