Improvements in and connected with Copying-presses.
Year: 1895

page_text: Date of Application, 13th Apr., 1895
Complete Specification Left, 11th Oct., 1895-Accepted, 16th Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in and connected with Copying-presses.
I, ALBERT ELTZBACHER, of Bonn on the Rhine, Kingdom of Prussia, German
Empire, Merchant do hereby declare the nature of this invention to be as
follows:-
This invention refers to copying-presses, in which the movable plate is pressed
upon the copying-book or the like by means of a screw-threaded spindle operated
by a lever-like handle or lever-like handles, and my improvements in presses of
said sort relate to connecting said spindle with said handle or handles not com-
pulsorily, but movably, in such a manner, that the connection between the said parts
will be automatically interrupted as soon as a certain pressure has been reached.
In order to make my invention more clear, 1 refer to the accompanying drawing,
in which I have shown as examples two modes of construction, Figs. 1-4 being
the first, and Figs. 5 & 6 the second.
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Referring to Figs 1-4, a is the screw-threaded spindle, which is connected at
its lower end to the movable press-plate b, and carries at its upper end the
handle c. The latter sits loosely upon said spindle and is supported by a collar a
forming part of the said spindle. Said collar is provided with one or more pro-
jections a 2, each of which forms at one side an inclined surface a 3. A collar c¹
fixed to the handle c has a projection or projections c 2 adapted to take into the
recess or recesses, left by the projection or projections a 2 of the collar a', and
said projection or projections c2 of said collar c¹ has or have each an inclined
surface c3 adapted to co-operate with the inclined surface a 3 of the part a 2.
The collars a and c form a coupling, and are pressed one against, or into, the
other by means of a spring d arranged upon the top of the spindle a above the
handle c.
The normal relative position of the parts of the coupling is shown in
Fig. 1; the pressure exerted by the spring d, or the friction resulting from said
pressure between the parts a¹ e respectively, is sufficient for allowing the spindle a
to be easily screwed upwards and downwards. If, however, the plate has been
pressed down upon a copying-book or the like, and the pressure exerted by the
plate is equal to that of the spring d, the coupling will then be interrupted, in
that by the co-operation of the inclined surfaces a 3 c3 the collar el is caused to
ascend, and to get upon the collar a', as shown in Fig. 2. There is, thus, no
possibility to increase the pressure of the plate 6 upon the copying-book or the
like beyond a certain height, the latter being given by either the strength, or tension
respectively, of the spring d, or by the degree of inclination of the surfaces a 3
and c 3.
b
In the modified form of construction shown in Figs. 5 & 6, the collars a' c' are
replaced by a solid cone a 4 forming part of the spindle a, and by a hollow cone c4
forming part of the handle c, and adapted to take over said coue a 4.. The friction
between the two parts a 4 c4 is sufficient for screwing the spindle up and down,
and for causing the plate to exert the necessary pressure for properly copying a
letter or other paper or document; but as soon as this pressure has been reached, the
frictional coupling between the parts a 4 and c4, or a and c respectively, will be
automatically interrupted.
I wish it to be understood, that I do not confine myself to the two modes of
construction shown in the drawing (said two modes being merely examples, as
stated already in the preamble), but that my invention proper lies in arranging

page_text: between the spindle and the handle of a copying-press a coupling, by means
of which the connection between said two parts is automatically interrupted as
soon as a certain pressure has been reached, or exceeded. The purpose of my
invention is to prevent the copying-press from getting broken by too strong a
pressure.
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ليمي
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Improvements in and connected with Copying-presses.
I, ALBERT ELTZBACHER, of Bonn on the Rhine, Kingdom of Prussia, German
Empire, Merchant 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 :-
This invention refers to copying-presses, in which the movable plate is pressed
upon the copying-book or the like by means of a screw-threaded spindle operated
by a lever-like handle or lever-like handles, and my improvements in presses of
this type relate to connecting said spindle with said handle or handles not compul-
sorily, but movably, in such a manner, that the connection between the said
parts will be automatically interrupted as soon as a certain pressure has been
.reached.
In order to make my invention more clear, I refer to the drawing sent in with
Provisional Application, in which I have shown as examples two modes of
construction, Figs. 1-4 being the first, and Figs. 5 & 6 the second.
Referring to Figs. 1-4, a is the screw-threaded spindle, which is connected at
its lower end to the movable press-plate 6, and carries at its upper end the
handle c. The latter sits loosely upon said spindle and is supported by a collar a¹
forming part of the said spindle. Said collar is provided with one or more pro-
jections a 2, each of which forms at one side an inclined surface a 3.
A collar c¹
fixed to the handle c has a projection or projections c 2 adapted to take into the
recess, or recesses, left by the projection, or projections a 2 of the collar a', and said
projection or projections c2 of said collar e' has or have each an inclined surface c3
adapted to co-operate with the inclined surface a 3 of the part a 2.
a
The collars a and c form a coupling, and are pressed one against, or into, the
other by means of a spring d arranged upon the top of the spindle a above the
.handle c. The normal relative position of the parts of the coupling is shown in
Fig. 1; the pressure exerted by the spring d, or the friction resulting from said
.pressure between the parts a' c¹ respectively, is sufficient for allowing the spindle
to be easily screwed upwards and downwards. If, however, the plate b has been
pressed down upon a copying-book or the like, and the pressure exerted, by the
plate b is equal to that of the spring d, the coupling will then be interrupted, in
that by the co-operation of the inclined surfaces a 3 c3 the collar e' is caused to
ascend, and to get upon the rollar a', as shown in Figure 2. There is, thus, no
, possibility to increase the pressure of the plate upon the copying-book or the
like beyond a certain height, the latter being given by either the strength, or tension
respectively, of the spring d, or by the degree of inclination of the surfaces a 3
.and c 3.
=
b
In the modified form of construction shown in Figs. 5.& 6, the collars a' c¹ are
replaced by a solid cone a 4 forming part of. the spindle a, and by a hollow cone c4
forming part of the handle c, and adapted to take over said cone a 4. The friction
between the two parts a 44 is sufficient for screwing the spindle up and down,

page_text: and for causing the plate b to exert the necessary pressure for properly copying
a letter or other paper or document; but as soon as this pressure has been reached,
the frictional coupling between the parts a 4 and c 4, or a and c respectively, will
be automatically interrupted.
I wish it to be understood, that I do not confine myself to the two modes of
construction shown in the drawing (said two modes being merely examples, as
stated already in the preamble), but that my invention proper lies in arranging
between the spindle and the handle of a copying-press a coupling, by means of
which the connection between said two parts is automatically interrupted as
soon as a certain pressure has been reached, or exceeded.
The purpose of my
invention is to prevent the copying-press from getting broken by too strong a
pressure.
Having now particularly described and ascertained the uature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In a copying-press, the combination with the threaded spindle adapted to
operate the movable plate of the press, and with the bandle or handles adapted to
operate said spindle, of means adapted automatically to disconnect said handle or
handles from the said spindle when the normal pressure of said movable plate has
been reached or exceeded, for the purpose as described.
2. In a copying-press, the combination with the threaded spindle adapted to
operate the movable plate of the press, and with the handle or handles adapted to
operate said spindle, of a coupling adapted to connect said handle or handles with
the said spindle as long as the normal pressure of said movable part has not yet
been reached or exceeded, for the purpose as described.
3. In a copying-press, the combination with the threaded spindle, adapted to
operate the movable plate of the press, and with the handle or handles adapted to
operate said spindle, of a collar e fixed to said handle or handles, and of a collar a¹
fixed to the said spindle; said collars having projections a 2 c 2, and inclined
surfaces a 3 c3 leading up to said projections; for the purpose as described.
4. In a copying-press, the combination with the threaded spindle, adapted to
operate the movable plate of the press, and with the handle or handles adapted to
operate said spindle, of a solid cone a 4 fixed to cr forming part of the said spindle
and of a hollow cone c4 fixed to, or forming part of said handle or handles, and
adapted to take over said solid cone, for the purpose as described.
Dated this 11th day of October 1895.
ALBERT ELTZBACHER,
By Geo. Thos. Hyde,
1, Broad Street Buildings, Loudon, E.C., Agent for the Applicant.