Improvements in Pencil Cases.
Year: 1889

page_text: Date of Application, 30th Nov., 1889-Accepted, 4th Jan., 1890.
COMPLETE SPECIFICATION.
Improvements in Pencil Cases.
I, LUDWIG ERHARD, Engineer Nuremberg, in the Kingdom of Bavaria, German
Empire, 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:-
My invention relates to a pencil case in which the cylinder containing the black
lead is adapted to fall in or out of the protecting case of its own weight but when
required to be used the lead cylinder is held projecting through the protecting case,
by means of a weight, so balanced, that, when the pencil is out, the weight falls into
such a position that the former can not return inside the protecting case until the
whole is reversed when the weight falls back allowing the lead to fall back into the
case.
In order to make my invention more clear, I refer to the accompanying drawing
in which similar letters denote similar parts throughout the several views.
Fig. 1 is a vertical section of the pencil when in use.
Fig. 2 is a vertical section of the same with the point inside the protecting
case.
Figs. 2 is a section on x x
fig. 2.
Figs. 3 & 4 show vertical sections of a modified form of the pencil.
Fig. 4 is a section on y y fig. 4.
C is the pencil protecting case, a b the black lead cylinder guided in the case by
the two blocks d' d², a pin e sliding in a slit in the case is attached to the middle of
cylinder a and this pin carries pivot f where on weight 9 turns. Weight 9 has a
pin / adapted pass into hole in the case when the pencil is in use.
The pencil as shown in fig. 2 is inside its protecting case, when it is required to
write, it is only necessary to turn the same upside down, i.e. with the point downwards,
the lead cylinder then falls down under influence of weight g the point projecting
through the end of the case. As soon a block d' comes to the end of the case,
however, weight g is so pivoted at f, that it will now fall into the position shown in
fig. 1, thereby forcing its pin h into hole and preventing the pencil from slipping
back into the case on being used.
In figs. 3, 4 & 4" is shown a modification in which a hollow cylinder h¹ is attached
to the upper guide block d' of the lead cylinder. The weight g is pivoted at fl to
the metal strip f fixed to the protecting case C and lying in a slit in the weight g.
As may be seen in fig. 4 when the pencil lies inside the case, the weight g lies inside
the cylinder h¹ on reversing the pencil the lead point projects through the case and
weight falls into the position in fig. 3 and by its lower end coming against the
upper edge of cylinder prevents the return of the pencil to the case.
On reversing
the case again, the weight falls back and cylinder h¹ passes over it allowing the point
to return inside the case.
g
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, that what I claim is :
In pencil cases:
1. The combination of a protecting case, a lead cylinder adapted to slide there in
L
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page_text: b
2. The combination of case c, lead cylinder a 6 guided by block d¹ d², cylinder h¹
and weight g pivoted at f, in the manner and for the purpose substantially as
described.
Dated this 26th day of November 1889.
LUDWIG ERHARD.
By Rayner & Cassell,
37, Chancery Lane, London, Agents for the Applicant.