| OCR Text |
Show 3 - - • the cell this design . the signaled recording ampltfier, 5) Chevenard(1) (1944) by tungsten wlres; mounted at trical a was a of on a to light on t (5) improved on holding A .. a substitute for the standard counterpoised dur alumin beam suspended the concave sample the balancing end into chart drive. due to excessive was a Alternately for elec- servo-motor and also to The chief claim made wear on re- of the beam became the knife-edge agate-plate balance weighing in the furnace mirror at the other end photographic plate, a oscillating motion cylindrical was by Cheve- unsatisfactory for This balance moving parts, commercial model manufactured in F'rance, 6) Lasater, et al, , (6) (1952) standard analytical balance for under changing load" recorded via a to either of two an a A quartz rod whisker its that the continuous is a signal pen introduced end of the beam, recording move a nard one . fine beam of contact to et ala • analytical balance consisting fleeted Allen" . electronic in Unbalance of the photocetls, amplifier to a The University oscillating beam a fulcrum to picked up and prism, and then was channeled reported was that of through recorder. of the National Bureau of Standards, which amplifier a was a of fiber s current photocell the most recent efforts much like the Oden-Keen of Utah modified measuring the elongation light beam reflected from 7) Among (19·54), use at the balance(3) employed with the addition of to control solenoid current and a a a Mauer(7) system very photocell and Brown Electronik recording |
