Improvements in Egg Openers.
Year: 1893

page_text: Date of Application, 13th June, 1893-Accepted, 5th Aug., 1893
CUM LEIE DI MULTICATION
Improvements in Egg Openers.
I WILLIAM THOMPSON of No. 37 Evesham Road Stratford upon Avon in the
County of Warwick, Architect and Surveyor 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 make use of a metal case in combination with partly circular steel plates having
teeth or fangs on their inner edge and which are secured to metal slides made to
work in grooves and actuated by spiral springs with other accessories fully
described hereinafter by which means a sharp sudden closing action is given to the
said partly circular steel plates causing the teeth or fangs to cut penetrate and
pierce with a number of perforations through and partly round the shell of an egg
boiled or otherwise such as is served on the table in its shell without cutting into
the yolk or crushing the egg. During the operation the egg can be held in any
suitable cup or support or it can be held in a persons hand.
.
In order to carry out my invention I make use of a metal case by preference of
cylindrical shape I secure to the inside of the case by means of screws rebated
wood sides parallel to each other, the wood used for the sides being of a hard
nature and of fine grain, the face of the case is secured by screws to the wood sides
and has a circular hole in the centre of it through which the top of an egg to be
operated on is passed; a band or ring of india-rubber is secured to the face by
means of a metal ring rivetted on the band or ring of india-rubber slightly overlaps
the circular hole and protects the egg shell from contact with the metal face ;
partly circular steel plates having teeth or fangs as hereinafter described are
secured by screws to metal slides which are made to work in the grooves formed
partly by rebates in the wood sides and partly by metal plates rivetted on to the
inside of the face; screw rods are made to pass through spiral springs and the case
and screw into the metal slides, the spiral springs in the relation already described
tends to keep the slides to which the steel plates are secured apart or open so that
in using the device the user has simply to press the slides together by means of the
screw rods which pass through the spiral rings and case; the slides when released
from pressure again opening apart from the action of the springs, stops are fixed in
the grooves to keep the slides in position when pressed together; the distinct and
peculiar features of this invention is the employment of partly circular steel plates
baving teeth or fangs on their inner edge in the form or shape of half round sharp
spines of a length at least double their width at the base the flat side of the teeth
or fangs being farthest from the top of an egg when operated on and also in the said
partly circular steel plates being secured to metal slides working in grooves by
which means additional weight and force is given to the teeth or fangs in perforating
the egg shell. I use steel plates approximating to the one eighteenth part of an inch
in thickness for the partly circular plates and the teeth or fangs are formed on their
inner edge by a definite interval.
In using this device the egg being held in a suitable cup or support or in the
users hand the top of the egg to be removed is passed through the hole in the face
of the device in a horizontal position and a sudden and quick pressure being given
by the thumb and a finger, of the users hand that is not supporting the egg, to the
screw rods causes the teeth or fangs of the partly circular steel plates to cut
penetrate and pierce through the egg shell a number of perforations partly round
the egg.
After the operation if the top of the egg be taken between the thumb
and fingers and a slight lateral pressure be given to the egg shell causes it to come
apart alround in a line with the perforations in a clean and clear division leaving
the contents of the egg shell below the line of perforations intact; by the use of

page_text: this der ice eggs may be operated on before being served on the table a person thus
desiring an egg to eat has simply to remove the top of the egg by the thumb and
fingers is herein. described. The semi-automatic action of the device admits of
eggs being operated on with rapidity.
In order that my said invention may be fully understood and readily carried into
effect reference is hereby made to the accompanying drawings in which like letters
of reference indicate corresponding parts in the several figures.
Fig. 1. is an elevation of egg opener. A metal face or case. B. circular hole
through which the top of an egg is passed to be operated on, the dotted line shews
the hole. C. C. spiral springs. D. D. screw rods. E. metal ring rivetted to face
for securing india-rubber band or ring. F. india-rubber band or ring. G. G. feet
or rests.
Fig. 2. is a view the face being removed. C. C. spiral springs. D. D. screw
rods. H. H. metal slides. I. I. partly circular steel plates having teeth or fangs
on their inner edge. h. h. and i. i. are dotted lines showing the positions of the
metal slides and partly circular plates when pressed into action for perforating an
egg shell.
J. J. rebated wood sides. K. K. portion of the rebate in wood sides,
the dotted lines shew the continuation of the rebates. L. L. stops to keep the
slides in position.
Fig. 3. is a side elevation.
A. A. A. metal case.
F. india-rubber band or ring. G. foot or rest.
an egg to be operated on.
D. screw rod. E. metal ring.
The arrow shows the position of
Fig. 4. is a section. A. A. A. A. metal case. B. hole in face for egg. D. screw
rod. E. metal ring. F. india-rubber band or ring.
H. metal slide. I. partly
circular steel plate having teeth or fangs. J. J rebated wood sides. K. K. grooves.
L. L. stops. N. N. metal plates rivetted to face to form with the rebates in wood
sides grooves for the slides to work in.
Fig. 5. is a section of a metal slide and a partly circular steel plate having teeth
or fangs. D. portion of a screw rod. H. metal slide. I partly circular steel
plate secured to metal slide by means of screws.
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 partly circular steel plates having teeth or fangs on their inner edge in the
shape or form of half round sharp spines secured to slides made to work in grooves
in combination with the other accessories as shewn in the drawings substantially
for the purposes herein set forth and described.
Dated this 12th day of June 1893.