A further object of this invention is achieved in consequence of the attainment of the foregoing object4 and resides iny the provision of a double acting jaw type stone Crusher which has a low center of gravity and in which vibration problems are minimized` by reason of the fact that most of thev crushing reactions of the jaws are imposed upon the eccentric pitman driver,Cement Grinding Plant, which is located near the bottom of the machine, thus necessitating only a relativelyr light upper structure on the apparatus.
Still another object of this invention is realized because of the imposition of the major portion of the crushing reactions upon the eccentric driver and resides in the provision of a jaw type double acting crusher having relatively light and simple guide means at the top of the fixed` frame of the machine, s o that conveyors and other accessory equipment can readily be installed above the jaws without hindrance from, or interference with, the components of the crusher mechanism, and particularly the upper guide means for the pitman, at the top of the machine.While the principles of this invention are generally applicable to double actingjaw type stone Crushers, they are more particularly suitable for application to a secondary Crusher, that is, aV Crusher designed to operate upon stone which has. already undergone a preliminary crushing operation so as to be substantially uniform in size and small enough to be handled by jaws which are spaced a relatively small distance apart.
With the above and other objects in View, which will appear as the description proceeds, this invention resides in the novel method and apparatus hereinafter described and more particularly defined by the appended claim, it being understood that such changes in the precise embodiment of the herein-disclosed invention may be made as come within the scope of the claims.