A treatise on gyrostatics and rotational motion . hes. The magnalium is very light, and so practically the wholemass of the rotating system is con-tained in the ring. The commutatoris mounted on one of the disks: thebrushes make contact with phosphor-bronze studs projecting inward fromthe magnalium disk which carries thearmature ring. The case is made in halves, pro-vided with flanges to enable themto be screwed together after they areplaced over the motor. The form of gyrostat with openframe, shown in the preceding diagramas being spun on the motor-drivendisk apparatus, has however beenimprov
A treatise on gyrostatics and rotational motion . hes. The magnalium is very light, and so practically the wholemass of the rotating system is con-tained in the ring. The commutatoris mounted on one of the disks: thebrushes make contact with phosphor-bronze studs projecting inward fromthe magnalium disk which carries thearmature ring. The case is made in halves, pro-vided with flanges to enable themto be screwed together after they areplaced over the motor. The form of gyrostat with openframe, shown in the preceding diagramas being spun on the motor-drivendisk apparatus, has however beenimproved so much by Dr. Gray andMessrs. Griffin as regards balance,management of bearings, and lubri-cation that it can be used for allkinds of purposes without danger ofderangement, spun many times with one oiling, and will continue tospin for from 10 to 40 minutes according to circumstances. Thus fora large number of ordinary experiments this type is perfectly convenient,and its cost is necessarily considerably less than that of the Parts of the gyrostat. 4. Effect f couple applied by weight hung oh otic side. Let the weight be hung on at 1), as shown in the diagram (a),in 1. If the flywheelwere not turning on its axis the effect would be simply to turn the ringand wheel about EF, ami the weight would descend until it came intocontact with the supporting stem. But with the wheel rotating rapidlythe result is widely different. A very slight downward motion of thepoint D can be detected as the immediate effect, but as soon as the leastsuch deflection has taken place the whole system begins to turn round,so that the point D moves sideways, or, with reference to the diagram (</),p. 1, at right angles to the paper. This motion goes on, and presently,as far as the eye can detect, a steady motion of the stem, fork, ring andflywheel (all as if they composed a rigid body) about the vertical has beenset up. The point D of the axis does not appear to descend further, and
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Keywords: ., bookcentury1900, bookdecade1910, bookidtreatiseongyrost00grayric
