Year: 1887

page_text: Date of Application, 25th Nov., 1887
Complete Specification Left, 22nd Aug., 1888
Complete Specification Accepted, 28th Sept., 1888
I JOAQUIM ANTONIO DE MACEDO of Scarcroft Lodge in the parish of Thorner in the
County of York, gentleman do hereby declare the nature of this invention to be as
follows:-
I take an ordinary egg-glass A A (see accompanying drawing) consisting of two
bulbs connected by a narrow neck and with sufficient sand (or it equivalent) in it to
require from four to five minutes for the whole of the sand to run from the upper to
the lower bulb. This egg-glass I attach to a metal frame B B B one end of which is
prolonged in the shape of a shaft and has at its extremity a hammer-head R-The
glass is secured in its position by two stars C C of thin steel, brass, or other material,
the lower one of which (or both if required) having a ring or short tube D fastened
to it, which ring or short tube fits tightly on the frame B, but not so tightly that
it may not be able with a moderate pressure to be turned to one side or the other
for the purpose of inserting or taking out the glass from its place-The frame B is
suspended from a horse-shoe-shaped swing F F F by means of a pivot_passing
through B and resting in two holes in the inner lower lugs of the swing at H. The
swing itself is suspended at G by two pivots fixed to the frame J and entering two
holes in its inner upper lugs-At the lower part of the frame J, a bell, gong, or their
equivalent, is suspended or fixed in such a position that when the hammer Ŕ falls, it
shall strike the bell-At the end of the frame B opposite to that where the hammer
is fixed, a small disc M is pivoted so that it can revolve and may be easily made to
turn on its pivot, and on the underside of this disc a weight N is attached, and on the
upper side of the same disc the words "WELL BOILED" "MEDIUM" and
"LIGHTLY" or figures indicating 2, 3, 3 minutes are printed-On this is placed
a second disc L with a segment cut out of its circumference to allow the letters or
figures on the first disc to come into view, and indicate the degree to which the eggs
will be boiled when the hammer falls and the bell or gong is sounded-The upper
disc is fixed to the pivot O with the side where the segment is cut and turned towards
the glass. The weight N is at the other side (the side opposite to that on which the

page_text: words
BOILED."
are printed) of the disc M and corresponds with the words "WELL
The distance between the pivot of the glass-frame and the pivots of the swing e. i.
from G to H is such that when the egg-glass and its attachments are turned or set
up for use (as shewn in the drawing) and all the sand being in the bulb next the
hammer the centre of gravity of the glass, sand, frame B, stars CC, the discs L
and M the weight N, the hammer R, the pivots H. and O. and the swing F F F taken
as a whole, that is their centre of gravity taken together shall be situated just above
the pivots on which the swing swings.
The swing serves the double purpose of continually altering the angle at which the
sand runs and thus preventing it from ceasing to run in consequence of the face or
surface of the sand in the upper bulb assuming a less perpendicular position than is
compatible with its running, and also of counteracting the injurious effects which
would otherwise arise from placing the egg-timer on a slightly unlevel surface like a
shelf or a mantel-piece.
Dated this 94th f
L
1007

page_text: COMPLETE SPECIFICATION.
An Improved Egg-timer.
I JOAQUIM ANTONIO DE MACEDO of Scarcroft Lodge in the parish of Thorner, in
the county of York, Gentleman do 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 :-
I take an ordinary egg-glass A A (see drawing left with the provisional specifica-
tion) consisting of two bulbs connected by a narrow neck and with sufficient sand (or
its equivalent) in it to require from four or five minutes for the whole of the sand to
run from the upper to the lower bulb. This egg glass I attach to a metal frame B BB
one end of which is prolonged in the shape of a shaft and has at its extremity a
hammer head R. The glass is secured in its position by two stars CC of thin steel,
brass, or other material the lower one of which (or both if required) having a ring or
short tube D fastened to it which ring or short tube fits tightly on the frame B but
not so tightly that it may not be able with a moderate pressure to be turned to one
side or the other for the purpose of inserting or taking out the glass from its place.
The frame B is suspended from a horse-shoe shaped swing F F F by means of a
pivot passing through B and resting in two holes in the inner lower lugs of the swing
at H. The swing itself is suspended at G by two pivots fixed to the frame J and
entering two holes in its inner upper lugs (or outer upper lugs) At the lower part of
the frame Ja bell, gong, or their equivalent is suspended or fixed in such a position
that when the hammer R falls it shall strike the bell-At the end of frame B opposite
to that where the hammer is fixed a small dise M is pivoted so that it can revolve and
may be easily made to turn on its pivot, and on the under side of this disc a weight N
is attached and on the upper side of the same disc the words "WELL BOILED,"
"MEDIUM" and LIGHTLY or figures indicating 2, 3, 3½ minutes are printed.
On this is placed a second disc L with a segment cut out of its circumference to allow
the letters or figures on the first disc to come into view and indicate the degree to
which the eggs will be boiled when the hammer falls and the bell or gong is sounded.
The upper disc is fixed to the pivot O with the side where the segment is cut out
turned towards the glass. The weight N is at the other side (the side opposite
to that on which the words are printed) of the disc M and corresponds with the words
"WELL BOILED."
The distance between the pivot of the glass frame and the pivots of the swing, e.i.
from G to H is such that when the egg glass and its attachments are turned or set
up for use (as shewn in the drawing) and all the sand being in the bulb next the
hammer the centre of gravity of the glass, sand, frame B, stars C C. the discs L & M,
the weight N, the hammer R, the pivots H and O and the swing F F F taken as a
whole, that is their centre of gravity taken together shall be situated just above the
pivots on which the swing swings.
The swing serves the double purpose of continually altering the angle at which the
sand runs, and thus preventing it from ceasing to run in consequence of the face

page_text: or surface of the sand in the upper bulb assuming a less perpendicular position than is
compatible with its running and also of counteracting the disturbing effects which
would otherwise arise from placing the egg-timer on a slightly unlevel surface like a
shelf or mantel-piece.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
The construction of an improved egg-timer as above described and particularly in
respect of the manner in which the glass is attached to its frame, to the construction
of the regulator by means of the two discs, and to the arrangement of the swing.
Dated this 21st day of August 1888.
JOAQUIM ANTONIO DE MACEDO.