Evaporated Kaspbbrries. 



541 



The lifting apparatus in Fig. 105, therefore, consists of two 

 double runs or columns of dogs on each side of the stack, and a 

 head-block above. The runs of dogs are shown at iVand at Y; also 

 at S. One line of dogs in each column is stationary and holds the 

 tray, and the other line is movable and lifts the tray. One of these 

 dogs is seen in Fig. 113. The dog S£^is a piece of cast-iron, hung 

 on a pivot D. There are two of these dogs, side by side- The side 

 of the tray rests on the projecting portion, above /S. One line of 

 the dogs is raised by the head-block and the tray is lifted with it, 

 the side of the tray, as it rises forcing in the dog above it. As the 

 tray passes the dog, the latter falls out by its 

 own weight and the tray rests upon it, whilst 

 the head-block is let go, and the movable line 

 of dogs falls back to its place. This is not the 

 form of catch or dog which was used in the 

 original Cassidy apparatus, for in that 

 the catches evidently worked by springs^ 

 and not by gravity. The brief of the \ S 

 original specification called for "the 

 combination of stationary posts pro- 

 vided with spring-catches, with vertic- 

 ally-movable posts carrying drying frames and 

 provided with similar spring-catches, and with 

 mechanism for operating the same." (See U. 

 S. Gazette of Patents^ ix, 165, 166.) 



The movable or lifting line of dogs is raised 

 by the head-block, shown at H iw Fig. 105. 

 This device is secured to a timber, C, let into 

 the brick-work, and through which the head, II, 

 plays. The apparatus is moved upwards by 

 means of the lever, Z, which works on a chain 

 fastened just below C. A rope, R (see also R 

 in Fig. 112), drops from the end of the lever to 

 the operator's hand on the first floor. The oper- 

 ator, therefore, pulls down on the rope, moving 

 all the trays up one notch, thus leaving the lowest 

 notch free for the insertion of another tray. Looked at from beneath, 

 the head-block presents the outline shown in diagram C, Fig. 105, 

 The attachment of the block to the lifting-rods is shown in diagram 

 D (showing a cross section), and also in T in diagram A. 



113.— Dog, or tray rest. 



