Improvements in apparatus for testing the accuracy of frequency of energy pulses with respect to a time standard

摘要

604,526. Circuits for stethoscopic and like apparatus. DU MONT LABORATORIES, Inc., A. B. Oct. 8, 1945, No. 26217. Convention date, Oct. 6, 1944. Drawings to Specification. [Class 40 (iv)] [Also in Groups XVIII, XXXVIII and XL (b)] In an arrangement for testing watches or other oscillating mechanical or electrical systems, a cathode beam scans the screen at a rate related to the correct speed of the watch to produce a substantially rectangular raster and is modulated by each tick or other periodic impulse. As a result, when the watch is going regularly at the correct speed, a horizontal line of dots is produced on the screen. If the speed is too high or too low, a sloping line is produced, or if it is irregular the line is not straight.