108 SEC. 4. KINEMATICS, STATICS, AND DYNAMICS. 



49. Slider-crank (Norman Wheeler). 



Three-fold. 



50. Slider-crank, with pin expansion, 2 within 1. 



51. Slider-crank, with pin expansion, 1 within 2. 



52. Slider-crank, with pin expansion, 3 within 2. 



53. Slider-crank, with pin expansion, 2 within 3. 



54. Slider-crank, with pin expansion, 2 within 3. 



Annular expansion. 



55. Slider-crank, with pin expansion, 1 within 2 within 3. 



56. Slider-crank, with pin expansion, 3 within 2 within 1. 



57. Slider-crank, with pin expansion. 



Adjustable stroke. 



58. Swinging block (slider-crank). 



59. Turning block (slider -crank). 



60. Skew (turning) cross block. 



61. Turning block (slider-crank). 



With pin expansion (can be used also as a turning slider-crank). 



62. Turning block (slider- crank). 



With reduced centroids. 



63. Double crank (drag-link coupling). 



With reduced centroids. 



64. Turning block (slider-crank), Redtenbacher's "Maskirte 



Kurbelschleife." 

 Quick return motion ; the stroke is adjustable. 



65. Swinging slider-crank. 

 65a. Swinging double slider. 



66. Swinging skew double slider. 



67. Conic crank -train. 



68. Isosceles double-crank (Galloway). 



Mean velocity, ratio 1:2. 



69. Isosceles double- crank (Galloway). 



Mean velocity, ratio 1:2; arrangement for crossing dead points, 

 by Reuleaux. 



70. Anti-parallel cranks (Reuleaux). 



Special arrangement for crossing dead points. 



71. Anti-parallel cranks (Reuleaux). 



With centroids, which are ellipses. 



72. Anti-parallel cranks (Reuleaux). 



With centroids, which are ellipses and hyperbolae. 



73. Double parallel crank train, used as a coupling. 



For transmitting uniform rotation. 



74. Double parallel crank train, used as a coupling (Reuleaux). 



For transmitting uniform rotation. 



75. Crank train for transmitting uniform rotation (Heilmann). 



76. Crank train for transmitting uniform rotation (Bohm). 



