138 SEC. 4. KINEMATICS, STATICS, AND DYNAAIICS. 



159. Screw wheels. 



Working as spur-wheels. 



160. Screw wheels. 



Screw wheel and rack. 



161. Bevel wheels. 



Plane- (face-) wheel and full wheel. 



162. Mangle-wheel train. 



Automatic reversal. 



163. Mangle-wheel train. 



164. Mangle- wheel train. 



With internal teeth. 



165. Whitworth's feeding gear for drills. 



The drill is under a constant pressure. 



166. Re versing gear, claw coupling. 



With bevel wheels. 



167. Reversing gear, bevel wheels. 



168. Reversing gear, returning wheel gear. 



By Reuleaux. 



169. Reversing gear, Sellers' arrangement. 



Open and crossed belts. 



170. Reversing gear, with three pulleys. 



171. Face-wheel and runner (Rupp). 



172. Speed changing gear (Sellers). 



For lathes. 



173. Speed changing gear with double pulleys. 



174. Reversing and disengaging train (radial). 



Wheels of 103 and 53 teeth respectively. 



175. Reversing and disengaging train (Fairbairn's). 



1 76. Reversing and disengaging train (Brown's) ; 



177. Engaging and disengaging train (Plait's). 



178. Engaging and disengaging train (Curtis'). 



Globoid Gearing. 



179. Globoid screw wheels ; spheric screw and wheel. 



Reuleaux. 



180. Globoid ring, screw, and wheel. 



Reuleaux. 



181. Skew globoid ring, conic screw and tooth. 



Reuleaux. 



182. Globoid ring, cone, and wheel. 



Used by Stephenson in locomotive reversing gear, 



183. Crossed globoid ring, screw, and tooth. 



Reuleaux. 



184. Crossed globoid ring, screw, and tooth. 



Reuleaux. 



