CONTINUOUS EAILWAY BRAKES. 



187 



To apply tlio brakes, tliG driver or guard Iota out siifBciont 

 of the cord from liis " winding reel " to allow the Z-shaped 

 frames to descend, and bring the surfaces of the two 

 friction pulleys into contact. When this is the case, the 

 " stepped chain " is wound oif the chain pulley on to the 

 barrel of the friction pulley ; the short piece of flat-link 

 chain is wound on to the excentric barrel of the upper chain 

 pulley; and the horizontal tie-i-od, with which the short 

 ])ieco of flat-linked chain is connected, pulls on the brakes. 



The " Heberloin " brake complies with the Board of 

 Trade requirements. It has, however, been very little used 

 in England. It is extensively used on the German railways, 

 and has also been fitted to a good deal of the rolling stock 

 sent out to South America. The Bristol Wagon Works 

 kave fitted it to stock for Spanish and South American 

 linos. 



In this country, the brake is in use on the Colno Valley 

 Railway ; also on the Highgato Hill Cable Line. The 

 orako gives satisfactory results; it is automatic in its 

 action as well as instantaneous. The reels and tackle do 

 not commend themselves to an English eye ; and the brake, 

 like other chain brakes, is open to the objection of being 

 affected by the weather and by frost. Reports, however, 

 speak well of the brake, which is, without doubt, the best 

 of its kind. In some respects it resembles Wilkin & Clark's. 

 This brake concludes the list of those to bo given in this 

 class. 



We now come to the moat important class of continuous 

 ijrakea ; tiliose belonging to Class III., Automatic Division. 



Among these are nundiorod the various typos of automatic 

 vacuum brakes in use, the different systems of air-pressure 

 brakes, and the ingenious " Barker " hydraulic pressure 

 brake, which in certain respects resembles the " Westing- 



