A gauge is used for selecting a proper adaptor, this gauge being in the form of a plate formed with a series of toothed openings all of which have different characteristics. These openings can be tried one after the other on the splined end of a given valve stem until an opening is ...
These openings can be tried one after the other on the splined end of a given valve stem until an opening is found which has a snug precise fit with respect to the particular splined end which is tested. The plate which forms the gauge carries adjacent the several openings indicia for ...