An Adjustable Back for the Covers of Books, Pocket-books, Letter- cases, Note-books, Purses, and the like.
Year: 1892

page_text: Date of Application, 12th Dec., 1892-Accepted, 11th Feb., 1893
COMPLETE SPECIFICATION.
An Adjustable Back for the Covers of Books, Pocket-books, Letter-
cases, Note-books, Purses, and the like.
I, JOSEF SCHMITZ-SCHLAGLOTH, of 6 Bachemstrasse, Cologne, in the Empire-
of Germany, Engineer, 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 present invention relates to an adjustable back for the covers of books,
pocket-books, letter-cases, note-books, purses and the like.
Pocket-books and cases, &c., hitherto in use, when filled with letters, papers.
or other articles or materials, have the disadvantage that the covers become
displaced, whereby the covers become damaged and they can be filled only to a
certain extent.
Through the displacement of the covers to one side, some of the contents, which
are susceptible of injury from the pressure of the covers, will be seriously injured.
This disadvantage, and others which result from the old form of covers, are entirely
obviated by the introduction of the adjustable back for covers, as with the shifting
of the double back according to the present invention, the covers remain always
parallel to each other.
The advantages obtained by my invention are a neat appearance, greater
durability, larger capacity and better protection to the contents of the case
or cover.
In the accompanying drawings
Figure 1 shows the case or cover opened out.
Figure 2 is a longitudinal edge view and
Figure 3 is an exterior view of the same when closed up and locked.
The case or cover is arranged in the following manner. The lower part of the
top cover of the case or cover is formed in one piece with the overlapping part b,
which passes through the double back cover a of the pocket-book, whereby such
parts are connected together and yet allow of adjustment of capacity according to
the contents by merely shifting or sliding the back cover a on the top cover b.
The drawings show my invention applied to a combined pocket and note-book,
but it is also applicable to covers or cases of a like character for other purposes.
The case or cover can be kept closed by various means, such as an elastic band,
a leather strap, buckle, &c. In the example shown in the drawings the case or
cover kept closed by means of a lock c which is so constructed as to allow of the
case or cover being locked in various positions according to the quantity of its
contents.
The lock is constructed in the following manner.
The case of the lock is provided with a series of holes to receive the locking pin
and the bolt is provided with a number of holes or cuts arranged in a line at a
short distance apart from each other, either of which holes or cuts can, according
to the quantity of the contents of the case or cover, be used for effecting the
locking. By shifting the bolt either forward or backward, the metal at the sides.
of one or other of the said holes or cuts is made to enter or leave a recess provided
in the locking pin and thus cause the pocket-case either to be locked or unlocked as
may be required.
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. An adjustable back for the cases or covers of pocket-books, purses, letter-

page_text: cases and other like articles characterised by the back cover a being moveably
attached to the top cover b, thereby allowing the said back cover a to be adjusted
in position by sliding on the top cover b according to the various quantities of the
contents of the case or cover.
2. The combination with the adjustable back above claimed, of a lock c provided
with a series of holes to receive the locking pin and with a bolt provided with a
corresponding series of holes or cuts to act in connection with the locking pin,
substantially as described.
D
1034
JOSEF SCHMITZ-SCHLAGLOTH,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.