Improvements in and relating to Tubes chiefly designed for Pen-holders.
Year: 1892

page_text: Date of Application, 22nd June, 1892-Accepted, 23rd July, 1892
COMPLETE SPECIFICATION.
Improvements in and relating to Tubes chiefly designed for
Pen-holders.
I, RUDOLF BLANCKERTZ, proprietor of the firm of Heintze and Blanckertz,
Steel Pen Manufactory, of 44, Georgenkirchstrasse, Berlin, in the Empire
of Germany, 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 tubes chiefly designed for pen-holders.
In order to prevent longitudinally slit or open tubes, which are more especially
used for pen-holders, from being bent open or widened, and to make them approxi-
mately as durable as closed, drawn tubes, I employ locking devices whereby such
tubes are kept closed from the inside.
Tubes closed in this manner from the inside and used as pen-holder tubes are
represented in the accompanying drawing.
Figure 1 shows a finished pen holder. The details are represented in Figures 2
to 9, Figures 5, 7 and 9 being sections on the lines I-II, III—TV, V-VI.
Figure 10 is an elevation of a protecting tube closed from the inside for pen holders,
and Figure 11 is a section of the same on the line VII-VIII.
The tube a is bent from the piece of sheet metal represented in Figure 3. On this
piece of sheet metal are four lugs a¹ and a² ², two and two of which belong to
one another. After the bending of the tube they lie together in the manner shown
in Figures 4 and 5. In this arrangement the lugs a¹ are in the prolongation of the
tube, whilst the lugs a² extend radially inwards. The latter must be suitably bent
round either before or during the bending of the tube.
Into the end of this tube, which is provided with the lugs a¹, either a closed or
slit locking tube, such as shown in Figures 6 and 7, is inserted in such a manner
that it will cover the slot in the outer tube a. The connection of the two tubes is
then effected by forcing the lugs a¹ a¹ into a common slot b¹ in the locking tube b,
as shown in Figures 8 and 9.
In like manner the other extremity of the tube may be closed and stiffened.
When such tubes are used for pen holders one locking tube may at the same time
serve for holding the pen. This pen is then slid in the well-known manner over the
Such an
open edge of the inner tube between the latter and the outer tube a.
arrangement is illustrated in Figure 1.
In the case of pen holders such as shown in Figure 1, where the tube is slid upon
the lower part of the wooden holder s, this part may perform the function of the
locking ring. For this purpose a slot is provided in its lover end, Figure 2,
which slot is of such a shape that the two adjacent lugs a² a² bent radially inwards
in the above described manner can be slid into the same. The aforesaid slot is
suitably made so narrow that the sliding of the tube upon the lower part of the
holder will require a certain amount of force. The tube is then kept securely
locked and is very firmly fixed upon the holder s.
In the last described manner I also secure the protecting ring in the case of the
pen holder shown in Figures 10 and 11, where the pen is slid into the axial aperture
in the wooden holder s. The aperture for the insertion of the pen is here
designated by d.
As regards the pen holder represented in Figure 1 it should be observed that the
means of attachment are scarcely visible on the outside, which is the case with rivets
pressed in, punched holes and other nodes of attachment.
The luos a a¹ and ² ² may be of any desired shape.

page_text: 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. Longitudinally slit tubes kept locked or closed by lugs, which are provided at
the two edges of the slot, being placed side by side in pairs and forced into the
common aperture of a piece inserted into the said tubes.
2. Longitudinally slit tubes kept locked or closed by lugs, which are placed
side by side in pairs and extend inwards, being pushed into a slot of a wooden
holder.
3. In pen holder tubes the locking or closing of the slit or open tube by pressing
the lugs a¹ a¹ into a common slot in an inserted tube b which may at the same time
serve for holding the pen (Figures 6—9).
Dated this 22nd dow of June 1802
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.