Beport on Miscellaneous Implement Awards at Derby. 007 
upon the stud n, so that the revolving arm E is held concentric 
with the saw, and is balanced by the counterpoise suspended in 
Fig. 5. — Elevation of Tatjlers Automatic Shield for Circular Saws, 
No. 5393. 
N 
6. — End view 
No. 5393. 
of 
the front. To the other end of the arm E is attached the shield, 
which is half circular, of steel, 1^ inches 
deep, and the same thickness as the saw. 
At its front end is a projection or con- 
tinuation, D, so formed that as the piece 
of timber to be cut approaches the 
saw, it causes the shield to rise and 
rest on the wood, ensuring safety to the 
operator, without perceptibly increasing 
his labour in moving the wood. The 
slight leverage from the counterbalance 
ensures the continuance of the shield on 
the wood, whilst its position over the 
saw is provided for by the guide-rollers 
LL, which are adjusted by means of 
a slide, M, and bolt attached to a rigid 
bracket, N, which is fixed to the back 
edge of the table-top. 
As soon as the timber has passed from 
the saw, the shield reverts to its original 
position, entirely covering the saw, and so 
remains until raised by the next piece of wood. This is of 
great practical importance, for the majority of accidents arise 
from careless handling of the pieces of wood returned to be re- 
