[1327]. The eccentric ring revolves on its centre, allowing the vanes to alternately project into the steam space as the wheel revolves.
[1328]. Ivory’s. An eccentric cam and two sliding shutters, with a central steam inlet.
[1329]. Mellor’s has a rocking vane oscillated by an eccentric piston carried round by a crank.
[1330]. Eccentric piston and two sliding vanes or steam stops.
[1331]. Differential rotary engine, with elliptical gear (see [Section 34]), or Stewart’s differential gear ([No. 554]) may be employed.
The “Tower” spherical engine is a well-known form of rotary engine. See Engineer, August 10th, 1883.
[1332]. An eccentric four-armed piston, with four rolling stoppers or packings.
[1333]. Mellor’s patent pump has a rocking vane or partition, with packing device which accommodates itself to the revolving oval piston.
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