Farrow's military encyclopedia : a dictionary of military knowledge . ers, furnished with still smaller arma-tures, that the magnetic attraction might be rela-tively great in proportion to the mass of these arma-tures, and to employ long and light pens, placed, aswell as the movable masses, as near as possible, orpracticable, to the axis of rotation, in order to re-duce to a very minimum the moment of inertia ofthe system. Moreover, in order to diminish the re-tardation of disconnection, Jlr. Marcel-Peprez pro-vided his registers with a means of regulating thecounteracting force applied to the
Farrow's military encyclopedia : a dictionary of military knowledge . ers, furnished with still smaller arma-tures, that the magnetic attraction might be rela-tively great in proportion to the mass of these arma-tures, and to employ long and light pens, placed, aswell as the movable masses, as near as possible, orpracticable, to the axis of rotation, in order to re-duce to a very minimum the moment of inertia ofthe system. Moreover, in order to diminish the re-tardation of disconnection, Jlr. Marcel-Peprez pro-vided his registers with a means of regulating thecounteracting force applied to the armature in sucha manner as to cause this force to form nearly anequilibrium with the magnetic attraction, so thatdisconnection takes place as soon as the attractionbecomes slighth reduced and instantly after therupture of the electric current. The forms given tothe Marcel-Deprez registers, in departing from theseprinciples, were very variable, and we will contentourselves with describing some especially ainilicableto the chronograph and other ballistic Fig- 3. Fig. one of the registers phiced against(he cylinder of a modified Sclniltz clironogra])!!, andFig. .i. represents the registers arrangeil side liy side10 in numbir, on a horizontal form lixed in front ofthe revolving <ylinder : they are iiKumted each on alittle screw-slide on which ii eounleracting springacts, and which allows each pen to come into con-tact with the cylinder or to withdraw from it at general lever movement of the form removes atwill all the pens at the same time,or, on thecontrarj^ MARCEL DEPREZ REGISTER. 207 MARCEL DEPREZ REGISTER. briii);8 them together in contact witli the cylinder. KiKh(lrctro-m!if;n<t,Fif;.1,is(onipoiJ<(lof two helices ofnljiiul \i 1 (().47i!4 inch) (liani<-(cr, |iliici-il vcrli- cally in a |)lune nurnial to the cylinilcr, anil Inrnishcilwilii pillar masses, rclalivcly stron;; ; between theniis lixed a small armature (if prismatic form,
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Keywords: ., bookcentury1800, bookdecade188, booksubjectmilitaryartandscience
