Year: 1887

page_text: Date of Application, 28th July, 1887
Complete Left, 28th Apr., 1888
Complete Accepted, 1st June, 1888
I, HEINRICH AUGUST HERMANN GUHL, of the firm of Guhl & Harbeck, of Hamburg,
in the Empire of Germany, Engineer, do hereby declare the nature of this invention
to be as follows :-
This invention relates to that class of type-writers, in which the writing or printing
mechanism is caused to move above the sheet of paper to be printed upon; and
the object of my improvements are first, to facilitate the alternate use of two or
more sets of types, and second to obtain an absolute immovability of the writing
or printing mechanism when in the printing position.
I attain the first improvement by making use of two or more sets of types
arranged concentrically on the lower side of a segment, the pivot of which can be
moved in a rectangular direction to the line whereon the letters have to appear
upon the paper. Controlling rows of letters, corresponding with the types on the
under side of the segment but which in the reversed arrangement are attached to
the upper side of the segment, and appear alternately, according to the position of
the type bearing segment, in a segmental slot in a plate fixed above the said pivoted
segment.
According to the second part of my invention I make use of a ratchet bar with two
rows of teeth being cut in opposite directions, or of two ratchet bars each with a
single set of teeth placed close to each other and cut in such a manner, that the
inclines of the teeth of the one bar are arranged in another direction to those of
the other bar. Into these two rows of ratchet teeth engage two pawls which are
attached to the base plate of the writing mechanism. One pawl is always kept in
contact with one row in such a manner as to cause the advancing movement of the
writing mechanism by engaging with the said teeth one after the other, while the
other pawl does not fall or drop into the other row until a moment before
the letter is printed upon the paper. The writing mechanism will thus be kept in
its correct position in a rigid and solid manner by the two pawls yielding in opposite
directions.
Dated thie 28th day of July 1887
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London.
Agents for the Applicant.

page_text: whereon the letters have to appear on the paper. For this purpose the index plate h
is guided once by the guide rod g' passing through ears and fixed to the bed plate g
and secondly by a bolt g² passing through a notch of the index plate as shown in
Figures 2 and 7. As the lever d is pivoted at d¹ to the bearing (Figure 3) of the
index-plate h, the pulling out or pushing back of this lever d will cause one or the
other of the two sets of types arranged concentrically on the index plate to appear in
the notch of the segmental plate f. The bed-plate is pivoted on the rod c which
serves as a guide-rod, along which the bed-plate g is moved sideways and around
which it vibrates.
The lever d is provided with a pointer k, following the movement of the latter and
of the flexible type-plate / so that, when the pointer k is set upon a certain letter of
the index plate and the lever d is caused to descend the corresponding type of the
plate is pressed down on the paper: For this purpose the arm of the segmental
frame of the flexible type-plate is fixed to the pivot d¹ Figure 3 of the lever d, and
when swinging around the pivot the types on the flexible plate / slide over and
slightly touching an inking cushion m³, attached to the under plate m which is
provided with a hole for the passage of the type, that is to be printed see Figures 3
and 4.
When the lever d is caused to descend its bow will press down the lever n
pivoted to the bracket n² of the bed plate g and therewith bolt n¹ which is always kept
directly above the corresponding hole in the underplate m. On its downward motion
the bolt n touches the back of the flexible type plate and while causing the latter to
deflect that type of the type-plate, being just under the bolt will be pressed upon the
paper. The downward motion of the lever n also causes the lateral movement of the
bed-plate g. The free end of the lever n is situated above the lever p, which is
suspended from the lever pl by a pivot around which the lever p can turn horizontally
(Figure 5). The lever p₁ is pivoted at p² to a bracket of the bed plate g.
A pawl o
attached to the lever pl is pressed continuously against a rack o² by the action of a
spring o'. The teeth of this rack o² are so arranged as 'to admit the pawl o to slip
over them when moved from the left of the machine to the right; while being moved
in the opposite direction it will be locked and thus cause a movement of the bed-plate.
Parallel to this rack o² is another rack having teeth pointing in a direction opposite
to that of teeth of the rack 22. When the lever p' descends, the cog i will come in
contact with the teeth of the rack o² and will thereby lock the writing mechanism
rigidly in this position. By directly pressing down the lever p¹ by means of the
arm p, the space between the words is produced.
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 :-
:-
First. In type-writing machines the combination of the two parallel racks o² and i¹
having teeth pointing into opposite directions, with a lever pl provided with a pawl o
and a cogi for rigidly locking the writing mechanism while a letter or other character
is impressed, substantially as specified.
Second. In type-writing machines the combination of the lever d of a movable
index-plate , with the type-plate l and the bolt n, for bringing either of the parallel
alphabets into the acting position, substantially as set forth.
Dated this 28th day of April 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.