IMPROVEMENTS IN BIRD CAGES
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by Matthew Wilson at the Office
of the Commissioners of Patents, with his Petition, on the 19th
February 1870.
I, MATTHEW WILSON, of No. 15, Wellington Street, in the Borough
of Southwark, in the County of Surrey, Gentleman, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN BIRD CAGES," to be
as follows:-
My Invention consists of an outer frame made in the same manner as
the body of the cage to which it is intended to be affixed, but leaving a
space of 2 inches more or less between the body of the cage and frame.
2. Between the frame and cage I affix to the cage 3 or more wire
guides to prevent the frame from contact with the cage.
3. I connect to the top of the cage a pillar with 3. radiating arms,.each
arm being provided with a grooved wheel.. Over each wheel a chain
passes, one end of each chain having a weight attached, the other end
having a spring clasp or otherwise, thus enabling each clasp to be
fastened into a socket provided for the purpose and fixed at 3 equal
distances round the top of the frame. Immediately upon a sudden weight

page_text: coming upon the outer frame it dissevers at the junction of the clasps and
sockets and falls to the ground.
4. In place of the aforesaid appliances of pillar arms, wheels, chains,
weights, sockets, and clasps, I purpose occasionally to use 3 pieces of
grooved metal or other material attached to the top edge of the cage at
equal distances and having a slightly curved hook composed of india-
rubber, gutta percha, vulcanized or otherwise, or other suitable material
fitting into the groove and projecting sufficiently to support the frame
until subjected to weight, when the clasticity or springiness of the materal
employed allows the frame to fall off.
5. Also another method by affixing 3 small projecting brackets equi-
distant round the top edge of the cage with the clasps as mentioned in
paragraph 3 pendant to them, and fitting into sockets as mentioned in
the same paragraph and acting in like manner when subjected to
weight.
6. Also another method by affixing to the top of cage 3 small levers
equidistant, the points of the levers projecting over the outer edge of
the cage and hooked sufficiently to hold the frame, and weighted at the
inner end to counterbalance the weight of the frame, but acting as
before mentioned when subjected to weight.
7. I also purpose affixing to the top of the cage or other convenient
part an alarum attached by fixing a plate to the spring case, and this to
be screwed to the top of the cage by means of screws and nuts or
otherwise so as to be set ringing when the frame is forcibly removed.
8. I also purpose making the pillar mentioned in paragraph 3 to
revolve by the hand if required.
9: I also claim another method, viz., by having, a short rod with
screwed end screwing into or fastened in any convenient way to the
centre of the top of a cage around the rod enclosed in a box, a spring
beneath the spring box, a small spiral spring around the edge of the
spring box and springing therefrom is the complete frame of a cage
completely enveloping the top & sides of the bird cage. Upon any weight
being applied to the outer frame it immediately disengages a catch
provided in or upon the spring box and connected with the rod
and revolves rapidly. The means of winding up the spring would
be by turning the framework in the opposite direction, to which it.
revolves

page_text: 10. Another method with precisely the same appliances excepting that
the frame only covers the top of the bird cage and another frame as in
paragraph 3 provided with sockets, and the above-mentioned top being
provided with clasps as mentioned in paragraph 3, thus allowing the
frame to drop off when subjected to weight and the top to revolve
rapidly.