Improved Construction of the Movable-coil Galvanometer for determining Current-strength and Electromotive Force in Absolute Measure
Eugen Obach · Proceedings of the Physical Society of London · 1882
I t would be possiblc to construct a piece of nppnrntus to exhibit the motion :Lpproxilniltclp.A piece of oliistic nieiiibrano, sufiiciciitly strctclicd i n all dircctions, should bc f;lstcnd at, a set of point.; coi*rcsponrling i o tlic points of rest, and tho middle points of the trinnglcs should then bo tlisplnccd accordinu to tlic p l i n ~e (SW fig.5), :inti Ciirric(1 round thcir origin:iI positions in circles of q u a l size :ind pcriwl, tha ndj:iccnt 1110tions being iii opposite dircctioiis-an arrangement wliich might easily bo effiicted by ; I series of' cogged whecls.. TVo should then hnvc n number of points fixed, and the corrwt iiiotion givcii at other points whcre thc niotioii is grentc:st.The motion of tlio rest, of tlic iiicin1)r:~iie csccpt near the ctlgcs wonld then be approsiinntcly corrcct.In fig. 3 is givcii an enlargctl vicw of onc of tlie tri:inglos, showing some of the points where tho motion is elliptic, arid the displacenient of the lilies through t,hc nodes ~" h 1 id perpendicular to the rays.a. XXXIII. Improved Construction of the .Movalrle-coil Galcanometer for determining Cwwnt-stwngth and EleclvomotiveForce in Absolute Measure.