390 REPORT—1883. 
tightening is given by a spring acting on one disc, which slides on the 
shaft d, being prevented from turning by a feather. This form is 
employed for the gripping wheels of the telpherage locomotive made by 
Messrs. Easton and Anderson, and may be seen in the exhibition driven 
for a yard or two by an electric current. One development of right- 
angle gear, due to Messrs. Ayrton and Perry, fig. 8, is employed in the 
small telpherage locomotive designed by them, and now in the room. 
Here the contact takes place along a line; the tightening is effected by 
wedging, and instead of two discs joined together by a spring, we have a 
single wheel with a rim in which the cones run. 
Figs. 9 and 10 show two further developments of right-angle nest 
gear contained in my first patent; the action is obvious, In addition to 
the forms of gear which have now been described, several applications 
of the principle have been made to oblique gear, to gear between parallel 
shafts, and to gear with belting, but the time at my disposal will hardly 
allow my explaining them or the latest methods of tightening. I trust 
to be able before the next meeting to publish results obtained from more 
prolonged and exhaustive experiments on various forms of the gear. 
