1896, ] A Simple Freezing Device. 197 
tothe rope by ordinary metal ‘‘snaps,” so that they can be 
instantly detached or put on. The rope should be of such 
length that when the bottom of one pail is about level with 
the top of the other the bottom of the latter hangs an inch 
and one-half above the base of the standard. 
The construction of the upright piece is evident from fig- 
ure 2, which shows an end view of the apparatus. The two 
uptight pieces are held together by a wooden cross-piece, 
from which a stout metal rod runs to the base; the axle of 
the wheel also aids in holding the two pieces together. 
_An automatic catch serves to retain the pails in the posi- 
tion shown in figure 3. Figures 4 and 5 show this contri- 
vance in flat view, one-half actual size. It is made of sheet 
Ton, one-quarter of an inch in thickness. The small hole at 
the top is for the screw which fastens it to the wheel. It has 
@ single continuous slot, D, in which are two notches, ¥ and 
F; the outlines of the slot and notches are dotted in the fig- 
Mes. A thin strip of copper, one inch wider than the sheet- 
1. Strip, is placed upon the latter, and its edges bent around 
the iron Strip so as to partially surround it. It is thus able 
: slide freely upon the iron strip, 
mi should Not fit loosely enough O O 
; of its own weight when in an 
whi Position. The copper strip, 
ae 's shaded in the figures, has 
*t, £, which in its narrowest part 
‘ the same diameter as D, over 
Which it t 
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a 
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p2 
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bo J 
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bv 
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ba Siie ee mented 
Yas . 
- thee” Passing through the hole 
Mall enon, € screw should be 
Swing PA to permit the strip to 
‘0 the rely. The strip is fastened 
Pails on a level, the 
lcal. It should be fixed 
