Year: 1886

page_text: Date of Application, 8th Dec., 1886
Complete Left, 8th Sept., 1887
Complete Accepted, 11th Nov., 1887
MICHAEL HEARN 10 Gayton Road Hampstead, N.W. Gentleman, do hereby declare
the nature of this invention to be as follows:-
In order to improve the driving mechanism of the paper carriage and also to get as
many levers & finger keys in as small a compass as possible in my invention No. 13,976
Nov. 16th 1885 I pivot a lever having two arms which are firmly secured to a cross
piece placed at right angles to the arms. This double lever is pivotted at right angles
to the circular levers operated by the finger keys and in such a way that the said arms
come under the circular levers. To the cross piece an eyed piece is attached which
may be fixed at the center of the said cross piece. Through this eye a rod is
passed being connected at one end with the lever for driving the rack and at the
other end in an adjustable screw thread head. At the depression therefore of
either of the circular levers, the above mentioned lever is also depressed by which
means a straight pull is made by the elevation of the cross arm on the lever driving
the rack and only one connecting rod instead of two being necessary.
I may also instead of the above pivot two levers similarly, but acting independently
for the same purpose.
The type levers may be made in two parts of which the shaft is one & the weight
the other.
The shaft may be a flat piece secured to the weight by a screw and pin, or it
may fit into a groove in the weight and be secured by a screw and I may instead
of stringing the type levers on a ring fit them into a plate indented with teeth ⚫into
which slots are cut. In which case the said levers may have pins passed through
their shafts which will fit into the said slots and permit of the levers rotating, or I
may have a circular headed piece with a screw stem and a pin projecting on either
side from the center of the circular head on which the levers will rotate; the screw
stem serving to secure the shaft to its weight, or a similar device without a screw
stem may be fixed to the shaft.
The plate above referred to may be perfectly flat and in order to steady the pins

page_text: of the type levers as they work in the slots another plate similarly indented with
teeth may be fixed over it. And such plate may have slots cut in it. Or if pins
are passed through the shafts of the levers the said plate will have to be raised
sufficiently along its outside rim wherein the slots are cut to allow of the levers
working freely without striking against the inner surface of the plate in the operation!
of printing. Such plate will be suitably fixed to the arms fitted to the circular frame
of the machine.
The key levers may also be fitted in a plate similarly indented and slotted working
on pins likewise.
I may also use a similar plate semicircular in form, but with two or three rows
of teeth placed one behind the other with sufficient space between the rows to
allow of the free movement of the weighted ends of the type levers. In the slots
the type levers will be fitted & preferably on one side of the machine, the said
type levers being operated at their weighted ends by key levers suitably placed for
that purpose.
The type levers being proportionately lengthened as they recede from
the common center.
The pivotted tooth for driving the rack of the paper carriage may have a flat spring
placed above it in order always to return it to position, such spring being secured to
the driving lever to which the tooth is pivoted & it may have a curved side working
against an adjustable screw placed horizontally. The said screw working in a suitable
support fixed to the base board of the machine.
I may also place, in order that the printed matter may be more easily read by the
operator, the printing ribbon at right angles to the paper carriage, passing it through
suitable guides fixed under the opposite central arms of the frame of the machine
and working it in a similar manner to that used in my present machine except that
the small levers and ribbon reels will be shifted to the position above indicated, the
reels being pivotted to a suitably shaped piece attached to the circular frame of the
machine.
I may also use two spacers, these being suitably fixed as levers to the central
arms of the machine and serving also as stops or guards to prevent the circular lever
arins operated by the finger keys from rising above their level line.
I may also pivot the type levers on a similar plate to that above described in a
straight row and work the paper carriage by a movement similar to that of a shuttle.
The paper carriage resting on a sliding plate which is drawn backwards and
forwards. The operation of these parts will be better understood from the
following:-
:-
The type levers which may also serve as key levers as pointed out in my patent
No. 13,976 Nov. 16th 1885 are pivotted in a row as above mentioned. Beneath
them and pivotted at right angles to them is a lever operating a sun and planet
movement or equivalent movement worked by two ovals instead of two toothed
wheels for obtaining the longest draw with the least amount of leverage. To the
shaft of this movement I may pivot a lever or wheel and to a piñ attached to the
said lever or wheel I pivot a rod or strap the other end of the rod or strap being
pivotted to the sliding plate on which the paper carriage rests. When therefore a
type or key lever is depressed it depresses at the same time the lever operating the
sliding plate. The paper carriage is accordingly borne along until the depression
of the key lever is stopped by a slotted plate. When so stopped the impression is
made on the paper. On the key lever being released it may be returned to its
normal position either by the force of balance or by the return motion of the lever
operating the sliding plate.
The operation of the latter being such as to always return the sliding plate to the
same point from whence it was drawn. It will be understood that every key lever
will be stopped in the same way to that above described but differentially. The slotted
plate being made with a series of gradated slots. As abovementioned the paper
carriage rests on the sliding plate in which it is suitably guided so as to be kept in
true alignment by a groove or equivalent device, the rack being attached to the
said paper carriage. This rack may be driven by a lever operated by the finger

page_text: keys or it may be driven by the return movement of the sliding plate above
described operating a toothed wheel or equivalent device suitably placed for that
purpose.
The type pieces may be carried in the key levers above mentioned or they may be
arranged in a form of two or more rows. The said form being fitted in a sliding
frame immediately under the key levers and brought into position to impress by the
action of the key levers operating a lever or spring movement. The type may be
inked by a pad fitted beneath them and over which they will pass. Or I may fit the
type in a sliding form or plate operated similarly to the sliding plate above described
by a sun & planet movement or two ovals similarly pivotted or an equivatent
movement.
In order to obtain a flat surface to print on I may use a roller with platens, and
in order to hold the paper evenly on the flat surface so presented I may pivot to
the same pins on which the roller rotates two levers connected by a rod which
runs longitudinally the whole length of the roller. Two flat pieces are attached
to this rod in such a way that they press directly on the flat surface of the roller.
A spring is attached to one of the supports of the roller to act in the following
way: When the rod above mentioned is drawn towards the operator the flat
pieces for holding the paper are raised, to admit of a sheet of paper being
easily inserted, and when the aforesaid rod is pressed forward the spring
pressing against one of the levers abovementioned presses the flat pieces down
on the paper and holds it firmly. This rod may also serve for a space scale
as well.
Or I may secure rigidly to supports a flat piece of wood the usual length of
the paper roller used in type writing machines, having rounded edges and the
under side rounded. Beneath this I may pivot a roller. In this arrangement the
paper will be inserted between. the roller and the rounded underside of the flat piece
above mentioned, and in order to hold the paper firmly on the flat surface of
this piece I may use a similar arrangement of a rod, levers and spring to that above
described.
Dated this Eighth day of December 1886.

page_text: MICHAEL HEARN 17 Nassington Road Hampstead N.W. Gentleman, 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:
These improvements relate to a patent granted to me for improvements in type
writing machines No. 13976 Nov. 16 1885 and provisional protection No. 16068
8th Decr. 1886 and are details regarding the working of the type levers finger keys
and spacing levers for a machine similar in form as pointed out in my patent No. 13976
Nov. 16th 1885.
Fig. 1 is a plan of the said machine.
Fig. 2. is a side view.
Fig. 3. is a perspective view showing the ends of the driving lever.
Fig. 4 is a view of the spacing lever.
Fig. 5 is the plan of the guide plates.
Fig. 6 is a perspective of the type lever fitted in the guide plates with the finger
keys fitted in a plate with vertical slots.
b.
A Fig. 5 represents a flat piece of metal with radial slots a intersecting a groove
Into these slots a a the type levers B are fitted as shown in Fig. 6. In the inter-
secting groove b a wire is fitted on which the type levers rotate. In order to hold
this wire in position a plate C similarly grooved and cut with radial slots is fitted
over it and secured at the center and ends as shewn at d d. These plates will of
course have as many radial slots as there are type levers.
D. Fig. 4 represents the spacing lever with pivotted tooth e which on being
depressed operates the wheelf thereby causing the wheel to move the carriage
rack by a step by step movement. The pivotted tooth e works against an adjustable
screw i fitted into a support j. A small flat spring k placed beneath the pivotted
tooth serves to keep it in position and to return it to its normal position. The spacing
lever D is fitted to a support / Figs. 1 & 4 and has a spacing plate m mounted on it
Figs. 1 & 4 by means of which it is depressed. It is returned to its normal position
by the spring which is fitted to the base board E of the machine.
The driving lever F Figs. 1 & 2 is fixed to a support o and rests as shewn in Fig. 3
on the cross arm D₁ of the spacing lever D. On depressing a finger key therefore the
lever F is also depressed causing the spacing lever D to act in the manner herein
before mentioned. The other lever G which is similar in all respects to the lever F
remains in its normal position and vice versa. The lever F is returned to its normal
position by a flat spring P fitted to the base board of the machine and immediately
under it. The guide plate a is supported by brackets q 9 as shewn in Fig. 1 & 2.
The finger keys H H are supported in a plate having vertical slots & with an
intersecting groove t as shewn in Figs. 1 & 6 and work on a wire bearing which is
fitted into this groove t the said wire bearing u being supported at both ends in

page_text: supports vv. The type lever is composed of two parts of which the shaft w is one
and the weight the other. The shaft has a projection a¹ where it is pivotted to the
wire bearing in the guide plate Fig. 6 and it will be readily seen that instead of a
wire bearing I may use pin bearings which would answer the same purpose. The
shaft w is fitted to its weight in the slot z and secured by pins-as shown in
figure 6.
The ribbon spools 11 are attached to the guide plate A by supports 22 and the
pivot 3 on which they rotate have a screw thread and fit into the thumb nuts 4 as
shewn in Fig. 1.
As the principle of this machine is the same as that for which I received a patent
No. 13976 Nov. 16th 1885 the operation of the machine is similar that is to say on
lightly tapping a finger key H the type lever B is rapidly moved downwards to the
common printing point 5 at the same time the lever For G depresses the spacing
lever D causing the pivotted tooth e to engage with the wheel which operates the
wheel g by which the rack his moved forward the necessary space for one letter and
so on at each depression of any finger key.
I
f
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :—
1. In a type writing machine the combination with the series of type levers B
having balanced or weighted ends working on a wire or pin bearing in the radial
slots a of two semicircular plates A & C fitted one over the other both the said plates
having radial slots a with grooves 6 intersecting the said radial slots substantially as
herein before described.
b
2. In a type writing machine the combination with the series of type levers before
mentioned of a series of finger keys H H working on a wire bearing in the vertical
radial slots ss of a semicircular plater with a deep groove t intersecting said radial
slots substantially as herein before described.
3. In a type writing machine the combination with the series of type levers and
finger keys herein before mentioned of levers F & G whose ends 6 & 7 rest on the
cross arms of a lever D used for the purpose of operating the carriage rack h so that
it is moved by a step by step movement substantially as herein before described.
4. In a type writing machine the use in combination with the levers F & G of a
lever D having a pivotted tooth e working against an adjustable screw i the said
tooth operating a toothed wheelf by which another toothed wheel g moves a rack h
attached to the paper carriage substantially as herein before described.
Dated this Sth day of September 1887.