Oyster-Opener. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE.
HEINRICH FRITZ SCHMIDT, OF ANGLETON, TEXAS.
OYSTER-OPENER.Specification of Letters Patent.
Patented Aug. 26,1913.
Application filed February 3, 1913. Serial No. 746,014.
To all whom it may concern:
Be it known that I, HEITnICiIr FIirz
SciTur, a citizen of the United States, re-
siding at Angleton, in the county of Bra-
5 zoria and State of Texas, have invented cer-
tain new and useful Improvements in
Oyster-Openers, of which the following is
.a specification, reference being had to the
accompanying drawings.
10 This invention relates to improvements in
oyster openers and an object thereof is the
provision of a device of this character, in
which the shell of the oyster is opened, and
the oyster cut from the shell in one opera-
15 tion of the device.
A further object of this invention is the
provision of an oyster opening apparatus
which comprises a base plate having a lever
mounted thereon, a pivoted knife mounted
20 on said lever, and the lever being secured to
the base plate by a universal joint, whereby
the lever may be moved vertically for open-
ing the shell and moved laterally for cut-
ting the oyster from the shell.
25 A stil further object of the invention is
the provision of an oyster opener compris-
ing a base plate and a lever pivotally mount-
ed thereon, the lever being adapted to sup-
port a fixed knife for cutting the hinge of
30 the oyster and also being adapted to support
a pivoted knife for spreading the shells of
the oyster.
With these and other objects in view, my
invention resides in the novel constructions
35 and arrangements of parts, to be hereinafter
more fully described, claimed and illus-
trated in the accompanying drawing, in
which-
Figure 1 is a side elevation of my device;
40 Fig. 2 is a top plan view thereof; Fig. 3 is
a section taken on the line 3-3 of Fig. 2,
and Fig. 4 is a section taken on the line
4-4 of Fig. 1.
Referring more particularly to the draw-
45 ing, the numeral 1 designates a preferably
rectangular base plate, on which is mounted
intermediate of its ends, a transversely ex-
tending box 2 which is adapted to receive
the edge of the oyster opposite its hinge and
50 maintain the oyster in a position for the op-
eration of the knives. An angular universal
bearing 3 is secured to one end of the base
plate and connected at one end to the bear-
ing, is a longitudinally extending lever 4.
55 A knife blade.5 is rigidly connected to the
lever intermediate of its ends and in aline-merit with the box 2 in the base plate and
an opening 6 is formed in the lever adjacent
the knife 5, in which :s pivotally mounted a
knife blade 7 on a spindle 8 which is se- 60
cured in the opposite walls of the opening.
A lever 9 is connected to the upper end of
the knife 7, and connected to the upper end
of the lever is a connecting rod 10 which ex-
tends rearwardly to the end of the lever. 6
Connected to the opposite end of the rod 10
is a handle 11 which is hingedly connected
as at 12 to the lever 4. An apertured bear-
ing plate 13 is secured to the upper face of
the lever 4, the aperture therein being adapt- 70
ed to receive the connecting rod 10 and a coil
spring 14 is wound around said connecting
rod between the lever 9 and the bearing
plate 13 for maintaining the knife 7 in en-
gagement with the knife 5. 75
r1The operation of my device is as follows:
In the practical use thereof, the oyster is
placed in the box 2 in the base plate, so that
the hinge of the oyster will extend up-
wardly out of the liox, whereupon the le- so
ver 4 is forced downwardly so that the rig-
idly connected knife 5 of the lever will split
the hinge of the oyster. The handle 11 is
thereupon nioved downwardly, which op-
eration will draw the connecting rod 10 85
rearwardly and actuate the pivoted knife 7
so that the shells of the oyster will be
forced apart. A further downward move-
ment of the lever 4 will move the knife 7
downwardly along the inner wall of one of go
the shells of the oyster and thereby sever
the oyster from the shell. If, when the le-
ver 4 is being moved downwardly for sever-
ing the oyster from the shell, the lever is
also moved transversely, it will be seen that 95
a slicing movement is given to the knife
whereby the oyster will be sliced cleanly
from the shell. It is apparent that the uni-
versal joint between the bearing 3 and the
lever 4 allows this transverse movement ioo
of the lever coincident with the vertical
movement thereof and this construction pro-
vides means whereby the shells are parted
and the oyster is cut cleanly from the shell
by one operation of the lever. 105
From the above description, taken in con-
nection with the accompanying drawing, it
will be seen that I have provided an oyster
opener which is simple in construction,
which may be cheaply manufactured and iio
which will fulfil all of the requirements of
such device.1,071,352.
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Schmidt, Heinrich Fritz. Oyster-Opener., patent, August 26, 1913; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853851/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.