Year: 1898

page_text: Date of Application, 28th Jan., 1898
Complete Specification Left, 28th Oct., 1898-Accepted, 3rd Dec., 1898
тргоѵешеци ID гарь
I, WILLIAM HUMPHREY WHEATLEY, of the Firm of Wheatley and Mackenzie,
Engineers and Patent Agents, of 40, Chancery Lane, in the County of London, do
hereby declare the nature of this invention-a communication to me from Jean
Antoine Henri Marty-to be as follows:-
This invention relates to improvements in rat traps of the kind described in a
Prior Patent No. 1899 dated April 14th 1883, and having reference to animal
traps consisting of a chamber with outside lattice or wire walls, divided by means
of a lattice or wire partition into two compartments, termed respectively the
introducing" compartment and the "cell" or lower compartment, and communi-
cating one with the other by a trap door which gives way under the weight of the
animal that is to be caught.
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The improvements according to this invention consist of an angular iron frame
hooked or otherwise fastened to the wire work of the trap; in the construction of
the trap-door which works on the said frame, the said trap-door being furnished
with two projections which turn under and perpendicularly to the plane of the
trap-door, and serve as supports for a metal-bar or pin that forms part with the wire-
work of the cage, constituting the shaft to which the trap-door is hinged, the
said trap-door having its edge slightly turned in throughout the part which moves
near to the vertical edge of the frame; in the arrangement of a flexible hook,
formed by the free end of one of the ribs of the partition, coming under and at a
certain distance from the trap-door for the purpose of bringing the latter back
again to its position of dependence on its counterweight as soon as the animal
falls into the lower compartment; and in the arrangement on the level of the
cone of the introducing compartment, of a flat wire-partition extending right across
the same and to the upper interior wall of the wired chamber, for the purpose of
deceiving the animal.
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page_text: hereby declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
This invention relates to improvements in rat traps of the kind described in a
Prior Patent No. 1899 dated April 14th, 1883, and having reference to animal
traps consisting of a chamber with outside lattice or wire walls, divided by means
of a lattice or wire partition into two compartments, termed respectively the
"introducing" compartment and the "cell" or lower compartment, and communi-
cating one with the other by a trap door which gives way under the weight of the
animal that is to be caught.
The improvements according to this invention are relative to the construction
of the trap-door and its frame, their object being to prevent the imprisoned animal
from opening this trap-door in order to escape, which sometimes happened in the
case of the original construction given to the trap door described in the prior
patent referred to.
In the accompanying sheet of illustrative drawings Fig. 1 is a longitudinal
sectional elevation of a rat trap constructed according to this invention. Fig. 2
is a detail view representing on a larger scale the improvements in the construction
of the small cage, serving to lead the animal upon the trap door. Fig. 3 is a
plan; and Fig. 4 a transverse section on line of Fig. 3, showing the improve-
ments in the construction of the trap door. Fig. 5 is a plan of the trap door with
its frame; and Fig. 6 is a cross section on line y-y Fig. 5.
In the figures similar letters of reference refer to similar parts.
The trap formed of a wire-work chamber is divided into two compartments,--
one E, termed the inlet chamber, and the other G termed the cell-by means of
a truncated conical wire-work partition A, at the apex of which a small cage K is
provided which serves to lead the animal upon the oscillating trap door H, through
which communication is established between the compartments E and G.
The trap door H is always constructed in shape of an oscillating metal plate p,
to which a counterweight 9 is attached, the pivot of this trap door is, however,
50 adjusted that its action can always be relied upon even when the pivot bolt
or the door itself should become rusty. For this purpose the trap door, cut out
of a metal plate, is made in one piece with lugs or ears pierced with holes o
slightly larger in diameter than that of the pivot a. The
ears or lugs P are subsequently bent down perpendicularly to
the plane P of the trap-door in such a nianner that the
pivot a which is fixed on to the wire-work walls of the small cage K supports the
trap door exclusively by its passing through the holes o, so that, supposing this
pivot to have become rusty it cannot impede the oscillating movements of the
trap door p. The edges of the trap door are slightly turned down at 2 all along
that portion which will bear against the corner iron forming the seat of the
trap door. This frame is formed by an angle-iron with vertical flange / and
horizontal flange k. The flange is hooked or sewn at h on to the bottom edge
of the wire-work of the small cage K. Owing to the bulge pa of the trap door the
latter is enabled to freely oscillate without coming in contact with the seams h.
As the animal imprisoned in the cell G is prevented from passing its claws between
the flange of the frame and the bulged edge 2 of the trap door, it will not
succeed in lowering the latter, since the weight y retains the same constantly in
contact with the seat k up to the moment when another animal passing over the
trap door causes the same to again oscillate.
T
In order that the trap door may constantly remain under the influence of the
weight after the animal has been precipitated into the cell, a flexible hook m
formed by the end of one of the ribs n of the wire-work of the chamber is arranged
beneath and at a small distance from the trap door, so as to yield slightly and
without concussion under the pressure transmitted to it by the trap door, charged 5
with the animal and to immediately return this trap-door in an upward direction

page_text: as soon as the animal has rushed into the cell, whereupon the counterweight q
again applies the door against its seat k.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In a rat trap formed by a wire-work chamber, divided into two compart-
ments by a truncated conical wire-work partition, at the apex of which a small
cage provided, the bottom of which is fitted with an oscillating trap door; the
combination therewith of an oscillating trap door, adapted to strike against an
angle iron frame sewn or hooked on to the wire-work of the small cage, and turn-
ing on a pivot fixed to the wire-work of the said cage by means of two lugs or
ears bent down perpendicularly to the plane of the trap door, the said trap door
having its edge slightly turned down all along that portion which becomes dis-
placed near the vertical edge of the frame, substantially as and for the purpose
described with reference to the drawing.
2. In a rat trap formed by a wire work chamber divided into two compartments
communicating with each other by an oscillating trap door, the combination of a
trap door turning on a pivot passing through the holes of ears or lugs rigidly
connected to this trap door and arranged perpendicularly to and under its base,
with an angle iron frame, sewn or hooked on to the open inner wall of the small
cage, constituting the apex of the wire work partition, and with a flexible hook
formed by the free end of one of the ribs of the said partition wall, arranged
underneath and at a certain distance apart from the trap door, substantially as,
and for the purpose specified with reference to the drawing.
3. The improved rat trap substantially as described with reference to the
drawings.
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