IMPROVEMENTS IN MACHINERY FOR FORMING STEREOTYPE MOULDS OR MATRICES
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Dmitri Timiriazeff at the Office
of the Commissioners of Patents, with his Petition, on the 18th July
1872.
I, DMITRI TIMIRIAZEFF, of St. Petersburgh, Russia, now of No. 8,
Southampton Buildings, London, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN MACHINERY FOR FORMING STEREOTYPE
MOULDS OR MATRICES," to be as follows:-
My said Invention relates to a machine in which the moulds or
matrices are formed in papier maché or other suitable material, by the
successive impressions of type through the medium of peculiarly con-
structed mechanism whose.action is produced by finger keys which are
manipulated like those of a pianoforte.
The said machine has a wheel around which the types are arranged.
at equal distances apart, and a movable platen for supporting the papier
maché or other material, and for moving or adjusting the same for
properly receiving the successive impressions of the types. It also has
mechanism for producing impressions of the type, and appliances for
moving the platen as each line is completed to bring the mould in the
proper position for the commencement of the next line.

page_text: The aforesaid type wheel is fixed on a suitable shaft or axle, and
revolves in a horizontal plane. The edge or rim of the said wheel is
perforated with holes equidistant from each other, in which are fitted
small cylinders of steel or other suitable metal that carry the types at
their lower ends. The said cylinders are provided with springs and set
screws to keep them in the proper position vertically, and their rotation
is prevented by pins or keys projecting from the cylinders into vertical
grooves in their holes.
To the vertical axle upon which the said type wheel is carried, and
below the said wheel I fix a lever which projects radially from the said
axle, and whose free or outer end travels over the surface of a stationary
horizontal ring without touching the said ring.
The latter is per-
forated with a number of vertical holes corresponding with those in the
type wheel.
In these holes I fit steel pins or pegs that are caused to
project when actuated by levers connected with the aforesaid finger
keys, of which there may be one row or several rows. When either
of these pins is raised it projects into the path of the type wheel lever
and acts as a stop, whereby the type wheel is arrested with the type
corresponding with the depressed key in the proper position to make its
impression in the mould.
The stop lever is provided with a spring hook, which when the said
lever strikes the pin acts through a series of levers upon a detent con-
nected with the mechanism for producing the impression of the type.
Between the said lever and the type wheel on the vertical axle of the
latter, I fix a bevel pinion which is geared into a similar pinion on a
horizontal revolving shaft. The latter is driven by a steam engine or
other motor, and imparts motion to the vertical shaft with its wheel and
lever.
Under the type wheel on the side where the impressions of the type
are taken I place a frame with two or more longitudinal rails. On
these rails, and mounted upon suitable rollers which travel thereon,
I place a smaller frame provided with two or more transverse rails.
On the latter I mount upon rollers the aforesaid platen, whercon is
placed the papier maché, thick paper, or other material in which the
mould or matrix is formed by the impression of the type carried by the
type wheel.
The required forward motion is given to the said platen by means of
a horizontal pedal mounted on an axis, which is provided with two

page_text: pawls arranged to act upon one ratchet wheel and move it the same
number of teeth during the downward and upward movements of the
pedal. The said ratchet wheel is connected with the platen by toothed.
wheels and a rack. A roller fixed at one end of the said rack is made.
adjustable in a groove formed on the edge of the platen, along. which
groove the said roller slides during the longitudinal movement of. the.
platen.
.
Each of the aforesaid finger keys is fixed on a vertical 'rod provided
with an adjustable finger; the latter, at each depression of the key,
presses down the pedal to a position depending upon the height of the
finger, whose position is regulated by the breadth of the corresponding
letter or type.
Over the point which when the type wheel is stopped is occupied by.
the type connected with either of the said finger keys is placed a disc
with a cam or number of cams. Immediately under the said disc is a
movable piston which is actuated by the cam or cams to depress the
type, and thereby cause the impression of the same to be made in the
paper or other material on the platen. The said cam disc is fixed on a
shaft fitted to rotate in bearings which are adjustable to adapt the disc
to the desired pressure; power may be applied to the said disc in any
convenient manner, and when the same is set free by the aforesaid
detent it operates as required.
One side of the said cam disc carries a pin or number of pins corrc-
sponding with the number of cams on the disc. After the cam has
acted upon the movable piston the said pin comes in contact with a
horizontal steel bar; the latter is temporarily withdrawn to release the
cam when the revolving stop lever comes in contact with either of the
pins or pegs of the fixed ring, and the spring hook of the said lever
catches upon the said pin. In the opposite side of the cam disc I form
an eccentric channel or groove for the reception of a button on the end
of a cranked lever, which has a fork at its lower end guided in suitable
ways. The said eccentric groove is so formed that at each revolution
or part of a revolution of the cam disc it slides under the aforesaid type
wheel and gripes the type cylinder tightly, adjusting the same under
the piston, and causing the successive impressions to be produced in a
straight line.
To enable the operator to justify or space the lines, the front side of
the aforesaid platen and the frame whereon it moves are provided with.

page_text: graduated divisions, and an index which may be readily adjusted to the
desired length of the lines of type. The said frame receives a, longi-
tudinal movement through an endless screw or worm, which determines
the spaces between the lines on the mould. The forward movement is
produced by means of a pawl operated by hand, and acting on a ratchet
wheel between two stops adjustable on a graduated dial, according to
space between the lines. The backward or return, movement of the
said frame when a fresh page is to be commenced is effected by means
of a pulley actuated by hand.
the
The type wheel axle and the shaft of the presser cam are actuated by
friction pulleys or other suitable appliances capable of imparting to
them an intermittent rotary motion.