From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Brochure detailing the features of Avery-Schenck dynamic balancing machines.
| Identifier | ExFiles\Box 132\2\ scan0160 | |
| Date | 1st July 1939 guessed | |
| DYNAMIC BALANCING AVERY-SCHENCK DYNAMIC BALANCING MACHINES enable results to be obtained in a minimum of time and with the greatest possible accuracy. They are of simple and robust design and embody the following important features:- - Determination of the unbalance error for any required compensation plane within a few seconds. - Easy and convenient operation. - Measuring results in ounces or inch/ounces. Angular position of unbalance is indicated in an entirely new manner by means of an angular disc. - Exact positioning of the pendulum axis— an essential for the accurate measuring of disturbing moments i.e., of their lever arms. - Automatic compensation system opposing the centrifugal force to the disturbing force of the specimen. Unbalance is measured by unbalance. - There are no measuring springs or other static elements. - A special chart setting method can be applied to the medium size machines. The machine is set in a minimum of time by means of a drawing of the specimen. This method is particularly suitable for mass production balancing. - A special arrangement reproduces the specimen within the measuring system to a scale, thus ensuring the highest degree of reliability and accuracy. - Permanent application of the resonance speed to the specimen, resulting in most accurate measuring. - Suitable for D.C. or A.C. current as required. - No end to end reversal of specimen. Both planes can be balanced in one operation. - Open bearing rollers facilitate the insertion of the specimen. - No exchange of supporting springs. These can be adjusted by a simple lever to suit the weight of the specimen. Large measuring range. - The centrifugal compensation system does not affect measuring members or bearings as the machine will withstand much higher disturbing forces. This ensures smooth running, and long life. - Indication is independent of pre-determined speed as the compensating system is driven synchronously with the specimen. - No residual moments remain uncompensated as the pendulum points can be made to coincide with the compensation planes. | ||