Fig. 1 of US Patent 455154 showing a Class B Climax locomotive. 
<p>Index: 
</p>
<dl><dd>A - Boiler</dd>
<dd>A’ - Cab</dd>
<dd>A<sup>2</sup> - Tank and Coal-Box</dd>
<dd>A<sup>3</sup> - Main Frame-Work</dd>
<dd>B - Wheel</dd>
<dd>C - Engine-Cylinder</dd>
<dd>C’ - Cross-Head</dd>
<dd>C<sup>2</sup> - Connecting-Rod</dd>
<dd>C<sup>3</sup> - Crank-Disc</dd>
<dd>D - Driver or Main Shaft</dd>
<dd>D’ - Universal Coupling</dd>
<dd>I’ - Worm-Wheel on the Screw-Shaft operating the Gear-Shifter</dd>
<dd>I<sup>2</sup> - Worm-Shaft to operate the Gear-Shifter</dd></dl>
Rush S.Battles
<a rel="nofollow" class="external text" href="http://v3.espacenet.com/textdoc?DB=EPODOC&amp;IDX=US455154">US patent 455154</a>