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).
Diagram of an apparatus used for measuring the tearing strength of untreated electrical insulating papers.
| Identifier | ExFiles\Box 24\2\ Scan242 | |
| Date | 30th January 1923 guessed | |
| ELECTRICAL INSULATING PAPERS (UNTREATED). 663 Dashpot Sample Bull-Dog Clip hole 1/4" diam SECTION AT AB END VIEW OF PAPER LOOKING IN DIRECTION OF ARROW. Drive {preferably geared motor} FIG. 2.—Apparatus for measuring the tearing strength of paper. | ||