The Wheel and cycling trade review . e • is what the Governmentpays Congressmen for travelling on passes,and bicycle clubs give foolish members med-als for. TESTING AND TIRE PLUGGING. There is always something in the repairshop needing testing. Steel balls, ? tubing,parts of frames, shafts, studs and the like re-quire to be tested to ascertain their regular testing machine is an expensivepiece of property. Here, however, is a verycheap all-around testing device which maybe rigged up by any one who desires it, as thecontrivance is not patented. Procure an iron frame of a second-handc
The Wheel and cycling trade review . e • is what the Governmentpays Congressmen for travelling on passes,and bicycle clubs give foolish members med-als for. TESTING AND TIRE PLUGGING. There is always something in the repairshop needing testing. Steel balls, ? tubing,parts of frames, shafts, studs and the like re-quire to be tested to ascertain their regular testing machine is an expensivepiece of property. Here, however, is a verycheap all-around testing device which maybe rigged up by any one who desires it, as thecontrivance is not patented. Procure an iron frame of a second-handcylinder printing press or something like it,and use one side, this being represented byA in Fig. 1. To this frame bolt boxes firmlyfor the several shafts shown in the cut. Thedriving belt is indicated F, and this drivesthe gears, G, these in turn driving the shafts,H H, the latter being run in bearings fas-tened to the uprights B B. The shafts H Hare cut with a screw press thread, so whenrevolved they operate upon the iron press. r/G 4 blocks, C C, and compress whatever object isplaced between them at E D, which is simplya foundation block. Suppose some steel balls are to be or three would be placed between sheetsof wrought iron and subjected to heavy pres-sure between the blocks C C of testing ma-chine. If the balls were pressed into themetal as represented by C C in Fig. 2, inwhich A and B are the sheets of wroughtiron, it would indicate that the balls couldstand severe pressure. Inferior balls wouldelongate, flatten, crush or crack under thestrain. Making spiral steel springs is a part of thecycle repairers trade. There are not so manyspiral steel springs on the average bicycle asto warrant keeping a supply on hand, there-fore it is customary to wait until it is knownjust what sort of a spring is needed beforemaking one. A very simple way of turningout serviceable spiral steel springs requiresthe use of a rod and gas jet only. First select a steel rod of the rig
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectcyclist, bookyear1888
