Page 505 - My FlipBook

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Fia. 313. Fig. 314.
Fig 313. Falling weight apparatus designed by the author. Full length; showing anvil with
above.
brass block, an instrument in the instrument sleeve and the mallet on the tripping table
Observe carefully that the mallet has uuide wires to conBne it in its definite line of fall (seen best in
Fiffure 314). The principal rod is 42 inches long and can be raised or lowered on its stand 20 inches.
feet and hun-
It has three scales: (1) centimeters and millimeters, (2) inches and tenth inches, (3)
dredths of feet. .
Fig 314. An enlarged view of the more essential parts of Figure 313, showing the mf^hamsm
This table
more definitely. The cord by which the tripping table is tripped is definitely seen in this.
^ fl.xed on the rod by a thumbscrew (which is hidden in th s view) by which ''","?'„?,,'' 'l.e„rd^
height within the length of the rod. When the tripping table is released by a slight pull on the cord
(mallet) very suddenly by a coi ed spring, giving the weight a
it is snapped from under the weight tlie guide wires can be brought
perfectly clear fall. The stand has a leveling arrangement by which
exactly perpendicular.
331)