Year: 1888

page_text: Date of Application, 22nd Oct., 1888
Specification Accepted, 30th Nov., 1888
We HEINRICH KUHLMANN, CARL KUHLMANN and HEINRICH ERNST KUHLMANN
all of Glueckstadt in the Kingdom of Prussia Manufacturers 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 :-
The extraordinary thickness and hardness of the shells of palm nuts as well as the
considerable difference in the sizes of the nuts which vary from the size of a bean
to the size of a chickens egg have hitherto prevented the use of suitable machinery
for the purpose of shelling palm nuts so that the breaking of the shells of these nuts
has been done by hand up till now.
The machine which is the object of the present invention overcomes the above
described difficulties being capable of breaking nuts of any size without injuring the
kernel.
Fig. 1 is a side elevation of the machine.
Fig. 2 is a front elevation, and Fig. 3 a plan thereof.
On the table or ground plate a of the frame m of the machine is vertically journalled
the shaft e carried in bearings at the top and bottom of the framing and provided
with a disc or frame B which carries in its surface a series of recesses or perforations s
placed at equal distances. Within the circle of these recesses is situated a cavity v
provided with ratchet teeth around its circumference to receive a pawl. t is the hub
of the disc B surrounding the shaft e.
9
The chambers s are each large enough to hold one of the largest nuts. These
chambers are for the reception of the nuts to be shelled.. The disc B is rotated by the
pawl and ratchet wheel so as to bring the said chambers consecutively underneath
the hammer h which descends with an elastic force upon the nut underneath in the
manner hereinafter described and breaks the the shell, the hammer consists of a bar h
kept in position at about half its height by the block d adjustably fixed on the bar
of the hammer and guided in the frame. The upper end of the bar h passes through
box o fixed to the frame. Between the box o and the adjusting ring i on the hammer
is a spiral spring a. Above the box o is fixed round the hammer rod a short spiral
spring p the rod being besides provided with nuts g, g screwed on its upper end. The
Price 6d1

page_text: machine is worked by the rotation of the main shaft K with a hand crank or other
motive device. On the shaft K is the cam Y coming into contact with guide d.
lifting the hammer upon further movement and compressing the spring into the
position shown in Figs. 1 and 2. If the cam is moved further it releases the hammer
which is precipitated downward by the force of the spring a and crushes the nut
underneath. That the hammer cannot fly too low and therefore injure the kernel, the
stop device is arranged which consists of a spring p and the displaceable nuts g g
This construction is necessary because of the resistance of the nuts and also because of
their difference in size. Upon a further movement of the disc B the broken nut is
pushed over a perforation or opening in the bottom plate through which it falls
out of the machine.
The shifting of the disc B is done by the grooved drum m which moves backwards
and forwards the crank n secured to the shaft e.
The shafte is reciprocated, and this movement is transfered to the pawl q in con-
tact with the ratchet teeth of the disc B. The spring with its roller stops the
disc B after each movement by the roller engaging into one of a series of suitable
recesses made therefor in the circumference of the disc B.
In Fig. 1 the disc B is shown in section and the pin q is omitted for clearness of
illustration.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what wo
claim is―
A machine for breaking the shells of palm nuts and the like comprising in com-
bination the disc B, the hammer provided with the springs and p for the
purposes described and mechanism for driving the hammer and disc in the manner
substantially as set forth.
Dated this 22nd day of October 1888.
HERBERT & Co.,
18, Buckingham Street, Strand, W.C.,
Agents to Applicants.