.lANlAKY 1, 1915 



19 



-The rnm-levi 



lorizontal position, the extractor reel at rest 



With the friction drive the cross-shaft of 

 I lie extractor runs all of the time as does 

 also the pump. This means that the pump 

 does not have to run quite as fast any of the 

 time and consequently tlie load on the en- 

 "iine is reduced, and danger of slipping- of 

 I he pump-belt is prevented. 



Third, allowing a variable ratio instead 

 of a fixed ratio, as in case of beveled gears. 

 By tins we mean that, in case the engine- 

 pulley is not just the right size to turn the 

 extractor at the proper speed, or if the 

 speed of the engine cannot be controlled to 

 tlie right point, the ratio between the driv- 

 ing-disc on the cross-shaft and the driven 

 paper pulley on the vertical reel-shaft may 

 1)6 changed. Possibly tliere are some who 

 do not understand the principle of what is 

 known as the friction drive. It may be well 

 to explain, therefore, that in this particular 

 form of friction drive a metal disc with a 

 perfectly smooth tlat 

 surface runs all the 

 time, being located on 

 the cross-shaft of the 

 extractor. When it is 

 desired to start the 

 extractor-reel this re- 

 volving disc i.s brought 

 into engagement with 

 a paper-rimmod pulley 

 on (he reel sliaft ; and 

 rolling against it, as it 

 docs, the reel speeds 

 up. tlie rapidity with 

 which it reaches its 

 maximum speed de- 

 ])onding entirely upon 

 tlie amount of pressure 

 brought to bear by the 

 disc against the paper ,,. ^, ... .,..„. 



■ ■ ■ v • f fl "■ — canilever in the vertical position. The disk is thus crowded 



pulley. iNOW, 11 the over against the paper wheel on the vertical shaft so that the reel turns. 



ratio of tlio drive is not 

 quite correct — for in- 

 stance, if the reel turns 

 too fast, so that there 

 is danger of breaking 

 combs— the paper pul- 

 ley may be raised, say, 

 1/4 inch on the reel- 

 shaft, so that it is 

 nearer the center of 

 tlie driving-disc, and 

 then the disc will not 

 drive it quite so fast. 

 On the other hand, if 

 the reel does not turn 

 fast enough the paper 

 pulley may be lowered 

 so that it x'uns nearer 

 the outside of the disc, 

 making a higher speed. 

 Fourth, doing away with noise and danger 

 of a breakdown. Beveled gears, unless sub- 

 merged in grease, are noisy, and wasteful of 

 power. There is also the possibility of 

 breaking a tooth, due to the power being 

 applied too suddenly, causing an expensive 

 delay. 



To show that the friction drive is ample 

 as a means for trans'nitting power, one has 

 only to point to well-known makes of auto- 

 mobiles such as the Cartei-car, Lambert, 

 Metz, etc., in all of which the friction drive 

 is successfully used. The illustration on 

 page 22 shows the friction drive as used in 

 the Cartercar. The success of this particu- 

 lar make of machine in climbing grades 

 even as steep as 50 per cent is too well 

 known to need further comment here. From 

 over a year's experience with the friction 

 drive as applied to honey-extractors, we 

 believe that the paper rim of the driven 



