Image from page 446 of “Canadian forest industries 1910” (1910)

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Image from page 446 of “Canadian forest industries 1910” (1910)
Title: Canadian forest industries 1910
Identifier: canadianforest1910donm
Year: 1910 (1910s)
Authors:
Subjects: Lumbering; Forests and forestry; Forest products; Wood-pulp industry; Wood-using industries
Publisher: Don Mills, Ont. : Southam Business Publications
Contributing Library: Fisher – University of Toronto
Digitizing Sponsor: University of Toronto

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CANADA LUMBERMAN AND WOODWORKER 27 tion with the battens or drafting boards, and is shown in fig. 8, where grooves have been made in the under side every two inches or so. Fig. 9 shows another useful method for drafting-board: Small metal clips being inserted in grooves in the batten and screwed to the back of the board in lieu of screws through the batt-ens. A variation of this is sometimes seen on large drafting-table tops, the batten being rabbeted for wooden buttons as in fig. 10. A dovetailed key, fig. 11, finds favor with many, and if well fitted is an effective method. Flush clamps across the end grain are used in a variety of situations and are attached by a groove and tongue joint. A common mistake is to form the tongue on the clamp, as in fig. 12, instead of on the end grain of the board, as in fig. 13. In first class work flush clamps are often mitered, fig. 14, so as to show no end grain. This is necessary when the edge has to be rounded or modelled, as in tables and desk tops. For common work, a rough but effective method is to plow a groove across the end grain and insert a strip if iron as in fig. 15. Where neither battens on the back nor flush clamps are desirable a very good plan is to glue up narrow strips, fig. 16, the grain being re- versed in alternate strips as indicated in the illustration. Any consideration of the methods of preventing warping would not be complete without a reference to the now familiar three-ply boards, which are used for such a variety of purposes to-day. Usually of three thicknesses of stout knife-cut (peeled) veneer, glued together with the inside piece across the grains of the outer ones, fig. 17, it forms perhaps the most effective method at our command to-day for holding wide ooards true and straight,—T. B. Kidner, in "Wood Craft." When to Install New Machinery Suggestions for Those Who Contemplate Re- placing Old Equipment by Modern Devices This is an age of new and improved machinery. The railroads are constantly abandoning locomotives and cars which are only partly worn, for the purpose of installing more up-to-date rolling stock. The pub- lishers of the big newspapers are forever remodelling their plants with the latest patterns of speedy printing presses to replace presses which are still in excellent running order, but are not up to the times. And so it is in the metal working shops and the woodworking establishments. The flour mill and the stone works are all in line for modern machinery a I the sacrifice, so to speak, of old and only partly worn machinery. The writer hss given this matter of new machinery for woodworking establishments some attention of late. He found that practically all of the enterprising woodworking mills were being refitted with various new types of machinery as a regular thing. At nearly all plants, one will ob- serve a number of new machines in crates or in process of being set up to take the place of some machine which seemed to be in good running condition, but which was not of the latest pattern. The era of new machinery for old is not restricted to boilers, en- gines, waterwheels, planers, band saws and other machinery of the mill, but includes the small tools. The new tool era is also in vogue. Second- hand dealers in woodworking machinery and took are doing a flounsh- in<y business in buying up partly worn machines and tools for sale m the country mills. The latest and most approved designs of saws are con- stantly in request in the modern shops, whereas you will find specimens of discarded saws of an off-pattern thrown aside, though still m fair working condition. Some would say that money is lost because of the throwing aside of some partly used gimlets to make room for the better patterns. The per- fected mitre scales are required to replace scales which are still service- able, but which are not quite up to the times. Bit braces on which some minor fixture has been improved are demanded because of a little time rained or a little better work done by the new brace. Chisels of all kinds must bo quite accurate to meet the needs of the modern woodworker Un- less the plane possesses several economical features and is capable ol doing fine work, it is abandoned to make space for a better grade. It is simply the woodworker’s fad Special taper files and other modern tools are the only kind supposed to be serviceable in the improved city shop. The older kinds of tools may still be in use in the small towns and re- mote plants. We find the same ideas prevailing also with respect to the machinery of the modern plant. You can speak with any of the interested parties on the subject with the same results. All argue the advantage of having new machinery and tools and the disadvantage of old machinery and tools. A superintendent has a good excuse for making little profit on the work when he is handicapped with old apparatus. And he uses that excuse every time the owner has anything to remark concerning the pro- fits and losses of the shop. • Sometimes new machinery is put in and still the results are poor, due to defective driving gearing. I saw a good, up-to-date mortiser run- ning badly in a shop because the driving wheels of the overhead shaft were in the shape shown at fig. 1. As soon as the driving wheels were fixed level the mortiser ran steadily and with good speed. The worn wheel had to be turned out in the hub and a bushing pur in as at B, fig- 2 , n , A party let a gasoline engine shafting get too hot and run dry m a mill. It was an up-to-date engine, but was running badly, due to the worn places, C, on the shafting, fig. 3. It was not an old engine The outfit was not ready for the junk heap. We have to distinguish between worn out devices and devices in which some particular part may be worn, as in this instance. In this case, the remedy consisted in replac- ing the worn shaft with a new one. _ In another case the shaft was worn, as at D, fig. 4. This was fixed by shrinking on a sleeve, E, fig. 5. In a self-feed rip saw, the feed roll was giving trouble and one man claimed that the machine was out of date. Not so. The feed roll which made the trouble was in bearings adjusted as in fig. 6. The bearings were slightly worn. The caps were a little too loose. The oil holes were plugged with gummy matter. All that wa necessary in this case was to have the bearings washed out, the caps reset, the parts cleaned and then the machine ran satisfactorily so far as the feed rolls were concerned. In another rip saw a spur wheel of the pattern in fig. 7 gave trouble, due to the wearing of the points of the spurs. But this did not condemn the machine. New spurs were put in, and then the chain driving gear-

Text Appearing After Image:
ing bothered and the party in charge wanted to give it up. The chain links were found to be worn at the bearing ends, as at F, fig. 8. The pins were worn, as at G, fig. 9. A new driving chain brought the mechan- ism up to date and no further trouble ensued at this point. Sometimes a glance at the belting of the sawmill or carpenter shop will reveal the condition of things. I saw some woodworking plants in which the belting was in the order shown in fig. 11. This illustrated the average order of the driving machinery and the apparatus in general. In this plan there was a hanger in use, like that in fig. 10, with a single centre support. In order to brace this hanger, the bar, H, was bolted at each end. When you see braces bolted on like this you can determine the nature of the driving mechanism of the shop. I was greatly aston- ished to see a common wagon wheel used as a balance wheel on a certain woodworking machine in a plant, as in fig. 12. It seems that the ma- chine lacked a steady motion, due to defective driving of the main power mechanism. But the boss thought differently. Therefore he happened to get his hands on an old wagon wheel, and this he had bolted to the belt wheel of the machine. This fly-wheel did not help steady the ma- chine at all. But the boss said it did, and that had to go. All such devices are money losers to the owners of the plant. New and improved machinery, tools, and devices for the woodworking plant are suggested. These are the remedies for all patchwork of bosses, me- chanics, carpenters, and.tinkerers.—George Melrose, in the "Woodwork- ers’ Review." Arrangements have been completed for the annual meeting of the National Lumber Manufacturers’ Association, at New Orleans, Louisiana, from April 19 to 21. An interesting programme of reports and addresses has been arranged, and a number of attractive entertainment features have been designed. A large attendance is tissured.

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