Self-Setting Trap. Page: 4 of 4
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set seeks the bait and naturally gets upon the
most elevated object in order to reach the
bait. This is the treadle 14, and his weight
is sufficient to tilt the same and rock the
5 shaft, throwing the arm 15 toward the door
and tilting the gravity-latch. This removes
the support from the bell-crank 21, and the
door 12, which is weighted, drops by gravity,
closing the door-opening 9. The rat in his
ro endeavors to escape from the inclosure seeks
the first opening at hand, which is the pas-
sage 3, and seeing nothing to obstruct his
passage passes through the same until he
comes in contact with the gravity - gate.
r5 This gate is formed of light sheet metal and
readily yields to his pressure, and through
it he passes and into the confining-chamber,
from which he cannot escape unless removed
by the attendant. As he passes under the
20 gravity-gate, he elevates the free end of the
same and tilts the bell-crank 20, thus raising
the bell-crank 21 so that it rides above and is
engaged by the gravity-latch 16, when it will
be observed that the trap is again set, and
25 thus the operation of successively capturing
the vermin may be proceeded with indefi-
nitely, the captured animals all being out of
sight from any animal entering the trap. By
disconnecting the wires 7 the confining-cham-
30 bher may be removed and the vermin killed.
Having described my invention, what I
1. The combination,with an entrapping and
a confining chamber, of a passage connecting
35 the two and provided with a gravity-gate, a
door mounted in the entrapping-chamber, a
locking mechanism located at one side of the
door, a rock-shaft for operating the same and
provided with a horizontally-disposed plat-
40 form or treadle adapted to be lowered by the
weight of the animal, and devices arranged
between the door and the gravity-gate,where-
by an opening of the gate raises the door,
which is engaged by the locking mechanism,
substantially as specified. 45
2. In a trap, the combination, with a cham-
ber having an opening and a reciprocating
door, of a rock-shaft bent to form a rock-arm,
a gravity-latch pivoted above and at one side
of the door and adapted to support the door, 50
a connecting-rod between the gravity-latch
and the rock-arm, a treadle mounted upon the
rock-shaft, and a bait-receptacle located above
the treadle, substantially as specified.
3. In a trap, the combination, with an en- 55
trapping-chamber and a confining-chamber
and a passage connecting the two, of a sliding
door mounted in the entrapping-chamber, a
pivoted bell-crank connected with the door at
one end and chamfered, a bell-crank mounted 6o
on the passage and having its upper branch
connected with the lower branch of the bell-
crank of the door, a gravity-gate pivoted in
the passage and loosely connected at its free
end to the lower end of the bell-crank of the 65
passage, a rock-shaft mounted in the entrap-
ping-chamber, provided with a treadle, and
bent to form a rock-arm, a gravity-latch piv-
oted above the door-opening and adapted to
engage the chamfered end of the bell-crank 70
in said chamber, a rod connecting the lower
end of the gravity-latch with the rock-arm,
and a frame located in the upper end of the
chamber and adapted to receive a bait, sub-
stantially as specified. 75
In testimony that I claim the foregoing as
my own I have hereto affixed my signature in
presence of two witnesses.
LAWSON HEINREY DOWELL.
T. F. BROUN,
J. B. MESSER.
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Dowell, Lawson Henry. Self-Setting Trap., patent, July 7, 1891; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth172735/m1/4/: accessed February 24, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.