Popular science monthly . is attached to the body of the side-car with braces of band-iron i^-g in. wideand 3 16 in. thick, the forward one beingfastened over the side rail and the otherto the upper rear part of the body. Theinside end of the hub-axle is supported bya piece of the same band-iron shaped asshown at B and bolted over the sideboards to the frame back of it. The same sizedband-iron is usedfor attaching thesidecar to the bi-c\cle, one piececonnecting thebody to the bi-cycle frame be-tween the largesprocket and thesmall one, and theother between theside rail of theb(3dy, through theb
Popular science monthly . is attached to the body of the side-car with braces of band-iron i^-g in. wideand 3 16 in. thick, the forward one beingfastened over the side rail and the otherto the upper rear part of the body. Theinside end of the hub-axle is supported bya piece of the same band-iron shaped asshown at B and bolted over the sideboards to the frame back of it. The same sizedband-iron is usedfor attaching thesidecar to the bi-c\cle, one piececonnecting thebody to the bi-cycle frame be-tween the largesprocket and thesmall one, and theother between theside rail of theb(3dy, through theboards to the tubeconnecting theseat and the rear-wheel hub. Thisis shown in C andD. The bars oftlic last attach-ment must betwisted slightK,as the drawingshows, to allowforthe slant of thebicNcle tube. 766 An Improved Grinder for Gas- Engine Valves AFTER a gas-engine has been used ±\. for a time, the vaKes, especiall\ the exhaust members, are apt to become pitted and scored. In some cases, this Popular Science Monthli/A. An abrasive wheel supported on a ballbearing shaft for valve-grinding purposes roughening is so pronounced that it isalmost impossible to grind the valvesinto a correct seating by the usualemery-and-oil process. The valve grind-ing will be considerably facilitated if thevalve-heads are surfaced off. An improved grinder for this purpose,recently marketed, is shown in the accom-panying drawing. An abrasive wheel issupported on a ball-bearing shaft drivenby encased gearing in such a way thatits speed is fourteen times that of thevalve-head and its direction of rotationopposite. The valve is carried by anautomatic, adjustable rotating chuckwhich insures that the valve will beproperly centered, this being dri\en bya small pulley from any availablepower. The abrasive wheel is properly be\cledto make sure that the angularity of thevaKe-head will not be changed. Acenlt-ring device is included to exertpressure on the \al\e-head and bring itin contact with the wheel. An
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
