TY - JOUR
AB - THIS is a subject which has been somewhat neglected and, as a result, connected information regarding the use of indicators on internal combustion engines is not readily obtainable. The author, who designed that most useful instrument, the Okill maximum pressure indicator, has given the matter much study and, in this monograph, presents a range of information and suggestions which should be most acceptable to those who have not had an extensive experience in the manipulation of these instruments. His survey is limited to the combined piston, spring and pencil-lever types, and traces their development from the original instrument devised by Watt about 1790 to the very carefully proportioned and accurate types now made to suit the severe requirements imposed on them by high-speed internal combustion engines. The possibility of inaccuracy and distortion of diagrams arising from piston friction, overheating and mishandling are pointed out and the methods of testing and calibrating the pencil movements are described. Then after dealing with inertia effects, spring vibrations and the correct forms of connectors, operating gears and other details, a number of present-day instruments are described and explained. The book should therefore be a most useful guide to the many engineers who depend on the indicator for periodical information as to how their engines are operating.
TI - Engineering
JF - Nature
DO - 10.1038/143423b0
DA - 1939-03-11
UR - https://www.deepdyve.com/lp/springer-journals/engineering-RWIt4LuX1M
SP - 423
EP - 423
VL - 143
IS - 3619
DP - DeepDyve
ER -