Improvements in Devices for Opening Hot Boiled Eggs.
Year: 1892

page_text: Date of Application, 7th Jan., 1892-Accented, 20th Feb., 1892
COMPLETE SPECIFICATION.
Improvements in Devices for Opening Hot Boiled Eggs.
I, FRANKLIN NELSON JEWETT, of Fredonia, in the County of Chautauqua and State
of New York, one of the United States of America, Teacher in State Normal School,
do hereby declare the nature of my invention for "IMPROVEMENTS IN DEVICES
FOR OPENING HOT BOILED EGGS," and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement:—
My invention relates to devices for opening hot boiled eggs, of which the
following is a Specification.
The object of my invention is to provide means for rapidly and easily cutting
the shell of a hot boiled egg, of which the following is a full description.
Figure 1 is a perspective view of my device, the dotted lines showing an
egg cut.
Fig. 2 is a cross section of the same on line xx, Fig. 1.
Fig. 3 is a longitudinal section of the same and
Fig. 4 is a perspective view of a modified form of my device.
My device consists of a base a having indented upon its surface a shallow bed a'
adapted to hold an egg and conforming substantially to the outline of one when
placed upon it transversely. is a knife having on the shank 6' a narrow pointed
blade with downward pointing cutting edge. This knife is secured in said base,
adjacent to the bed a so that the point projects into the bed a³ and is adapted to
penetrate the shell of the egg without penetrating so deep as to reach the yelk.
The sides of the base a may be cut away so as to leave merely a central ridge a',
if desired. The knife & may be secured to the base a in any suitable or desired
manner and it may have any shape, provided, however, that it is not without
narrow pointed blade with straight back and downward projecting curved
cutting edge.
a
In operation the egg is placed over the point of the knife 6 in a position such
that its major axis is substantially at right angles to the plane of the knife b. The
point of the knife 6 is first forced through the shell, so that the shell rests down
upon the surface a³, which acts as a guide, limiting the penetration of the knife b
into the interior of the egg. The egg is then rotated upon its axis in the direction
which forces the interior surface of the shell upward against the cutting-edge of
the knife b and sliding the exterior surface upon the guide a³, which acts also as a
fulcrum between the edge of the knife b and the power applied in rotating the egg.
In this manner the knife 6 is made to cut or tear the shell from inward outwardly,
so that on the one hand the cutting is limited to a depth not liable to penetrate
the yelk of the egg and on the other the cutting is accomplished without crush-
ing the shell.
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 :-
1. In a device for opening hot boiled eggs, the combination of a base a, having
an upwardly-projecting portion a', and the guide a³, with a knife b, which is rigidly
attached to the base a in such a manner that the plane of its cutting-edge is sub-
stantially at right angles to the surface of the guide a³, substantially as and for the
purposes set forth.
2. In a device for opening hot boiled eggs, the combination of a base a, having
an upwardly-projecting portion a' and concaved guides a³, and a knife b, substan-
tially as and for the purposes set forth.

page_text: 3. In a device for opening hot boiled eggs, a base a, having an upwardly-project-
ing portion a¹, a guide or fulcrum a³, and knife b, the parts so arranged that the
penetration of the knife h is limited and that by rotation of the egg, as described,
the shell is cut or torn from inward outwardly, substantially as and for the purposes
set forth.
Dated this 24th day of December A.D. 1891