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posed beneath the guards, rack bars carried
by the ends, a toothed roller coacting with
the rack bars and adapted to positively drive
said trough, a portion of the toothed roller
5 removed to thereby allow said trough to be
removed from and installed in position in
the sty.
2. The combination of an inclosure having
an opening provided with ways extending
10 into and out of the same, a sliding trough
mounted in the ways, rack bars carried by
said trough, a toothed roller coacting with
the rack bars adapted to positively drive
said trough, and adapted to retain said trough
15 parallel to the end of said inclosure, a por-
tion of the toothed roller removed to there-
by allow said trough to be readily removed
and installed in position within said ways.
3. The combination of an inclosure hav-
20 ing an opening and provided with ways ex-
tending into and out of the same, a sliding
trough mounted in the ways, rack bars car-
ried by the ends of said trough, a toothed
roller coacting with the rack bars and adapt-
ed to move said trough in and out of said
inclosure in a parallel manner, said toothed
roller having mutilated gears to thereby
allow said trough to be readily removed and
inserted in position in said ways, a lever
carried by the roller and adapted to rotate
the latter to limit the inward movement of
the trough relative to the inclosure.
In testimony that we claim the foregoing
as our own, we have hereto affixed our sig-
natures in the presence of two witnesses.
DUKE A. WILKINSON.
BEN A. AUSTIN.
Witnesses:
W. S. PENDLETON,
W. B. SMITH.
Copies of this patent may be obtained for five cents each, by addressing the " Commissioner of Patents,
Washington, D. C."
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