Year: 1893

page_text: Figure a plan, anu
Figure 4 a transverse section along the line x-y Figure 1.
Figures 5, 6, and 7 are transverse sections shewing the stem of an operating key
in three successive positions.
Figure 8 is an end view shewing the device for restoring the cylinder or segment
to zero after each movement ;
Figure 9 is a plan of the key plate; and
Figure 10 is an elevation of one of the outer keys.
The rotating type cylinder or segment of a cylinder (hereinafter called the
cylinder) is constructed in a similar manner to that described in my former Speci-
fication or in any other suitable manner, as are also the remaining parts of the
machine not fully illustrated or represented in and by the accompanying drawings.
The lower part of the cylinder only, is represented at A, Figure 1.
B is the long pinion through the teeth of which the cylinder A is rotated by the
motion of the toothed quadrant C. In my former machine I employed two toothed
quadrants, one to drive the cylinder through the pinion B and the other, driven by
that pinion, to bring stop finger into contact with the keys. Since the stop
finger necessarily moved through the arc of a circle, it followed that the keys
must also be arranged in the arcs of concentric circles, an arrangement which,
although perfectly convenient and commonly adopted in writing machines, is
objectionable to some operators and less advantageous than the linear arrangement
of keys which my present invention enables me to employ.
In either case, when
the cylinder is in the printing position, so long as pressure is applied to the keys,
the driving quadrant tends to rotate the pinion B, whilst the driven quadrant being
stopped, prevents the rotation, and it follows that all backlash between the teeth
of the pinion and quadrant is taken up, and the cylinder will be brought into the
precise printing position without shake or vibration.
C is the driving quadrant, and C¹ is the driven quadrant. These two quadrants
are secured respectively, C to the driving bar or lever F, and C₁ to the stop bar or
lever D. The stop bar D is mounted between the pivots E E' so that it may be
oscillated freely by the motion of the pinion B transmitted through the quadrant C¹.
The driving bar F is parallel with and below the bar D, and is carried by the

page_text: brackets G G which may be supported or suspended on the pivot E' and the
bar D respectively as shewn, so that in the absence of any restraint, each of
the bars may be oscillated independently. The driving quadrant C, is firmly
secured to the bracket G so that any motion imparted to the driving bar is directly
transmitted to the pinion B.
On each of the bars D F, I form wings or projections in such a manner that in
plan, the wings H on the driving bar preferably alternate with the wings Hon
the stop bar. (Figures 1 and 2.) The construction and operation of these wings
will be hereinafter fully described with reference to Figures 5, 6, and 7.
Upon each side of the bars D F, there are arranged two rows of keys, the upper
ends of which pass through the slots II in the key plate J, Figure 9. The upper
ends of these keys are provided with index tablets denoting the letters which they
respectively produce as in my former machine. The keys are cach provided with
a driving shoulder K and with a stop L, the positions of these driving shoulders
and stops being relatively to the axis of the pivots E E' precisely alike on every
key stem, and all of them facing towards the bars D F. As the two outer rows of
keys are at a greater distance from the bars than the inner rows, these rows of keys
are made wider as shewn by Figure 10, so as to bring the parts K L into the
required position relatively to the bars. On the back of each key there is a
projection or part M the use of which will be described also in reference to
Figures 5, 6, and 7.
On each side of the bars I) F and parallel therewith, there is a light rail O,
carried in the brackets P P¹ freely pivoted at N N¹. These rails are normally
pulled up by the springs Q. The under sides of the brackets P P have projections
carrying the small friction rollers R R and at their upper sides other similar
brackets carrying the small friction rollers S S. On or forming the stem of the
quadrant C there is a cam shaped plate T, having the two shoulders T' T.
When the machine is at rest, the friction rollers S S rest against the shoulders T'T',
and by their means the cylinder is always brought to the zero or central position
after each excursion, and it will be obvious that the cylinder cannot be moved until
one of the rollers S has been disengaged from its shoulder T.
I will now describe the operation of the apparatus with reference to Figures 5, 6,
and 7. In Figure 5, the apparatus is shewn as its parts exist in relationship to
each other during rest. The springs U now hold the keys in their highest position.
Immediately upon the depression of a key, its projection M comes into contact with
the rail O, and depresses it, thus releasing the cam plate T and permitting the
pinion B and the cylinder to be turned. (Figure 6.) As the motion of the key
is continued, its projecting shoulder K comes into contact with its appropriate
wing H on the bar F, thereby depressing it and rotating the bar through an angle
determined partly by the amount of lost notion in the key before its shoulder
comes into contact with the wing, and partly by the vertical distance of the contact
point of the wing from a vertical plane passing through the axis of the bar. The
tips of the wings are therefore on an inclined plane and they serve the same
purpose as the stepped or diagonal lever of my former construction, the full
depression of each wing bringing a particular type on the cylinder into the printing
position.
As the two bars D F are geared together through the pinion B and the
quadrants CC it follows than an oscillatory motion in the bar F will produce
without backlash a corresponding motion of the bar D, in the same direction. ID
consequence, when a driving wing is depressed by one of the keys, the stop wings
on the rod D will be moved and the appropriate wing H will ultimately come into
contact with the stop L on the depressed key, beyond which motion of the bars DF
is impossible and the cylinder is securely locked in the impression position.
During the depression of the key, the roller R is brought into contact with and
depresses the lever V, Figure 7. This lever communicates motion to the letter
spacing dogs which control the motion of the paper carriage and which are con-
structed as in my former machine. The rail O also communicates motion by the

page_text: stud Y, Figure 3 to the lever W, which also is of somewhat similar construction
to the corresponding part of my former machine, and which releases the impression
hammer.
The stop wings H are arranged in an inclined plane as is the case with the
driving wings, and consequently the driving bar will rotate the cylinder for a
different distance for each stop wing before it comes into action, this distance being
that at which the type corresponding to the key in action comes into the printing
position.
There are as many wings H and H¹ respectively as there are keys, and they are
preferably formed as horeinbefore described, upon the two bars D F but they may
if desired, be formed upon a single bar when they will have the appearance
represented in plan by Figure 3. In this case only one quadrant will be
required and a detent might be employed to overcome the backlash between the
teeth of the pinion and of the quadrant, this detent being actuated in an obvious
manner by the rails O at the bottom of their strokes.
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. In a writing machine of the type herein set forth, an inclined series of contact
points formed or secured upon both sides of an oscillating bar and arranged to be
operated in each direction by the keys, substantially as and for the purpose herein-
before described and as illustrated by the accompanying drawings.
2. In a writing machine of the type herein set forth, an inclined series of contact
points formed or secured upon an oscillating bar and arranged to come into contact
with the keys and act as stops, substantially as herein before described and as
illustrated by the accompanying drawings."
3. In a writing machine of the type herein set forth, a cam plate T having two
shoulders upon its periphery in combination with two bowls S S engaging there-
with, and two rails O by the motion of which the bowls are disengaged from the
shoulders, substantially as herein before described and as illustrated by the accom-
panying drawings.
4. In a writing machine of the type herein set forth, the combination and
arrangement with an inclined series of contact points formed or secured upon an
oscillating bar and arranged to be acted on by the keys, of a second inclined series
of contact points moving therewith and arranged to come into contact with the keys
and act as stops, substantially as hereinbefore described and as illustrated by the
accompanying drawings.
5. In a writing machine of the type herein set forth, keys having formed thereon
shoulders arranged to co-operate with an inclined series of contact points on an
oscillating bar or lever for the purpose of transmitting motion to the type cylinder,
substantially as herein before described and as illustrated by the accompanying
drawings.
6. In a writing machine of the type set forth, keys having formed thereon stops
arranged to co-operate with an inclined series of contact points on an oscillating
bar or lever for the purpose of arresting the motion of the type cylinder,
substantially as hereinbefore described and as illustrated by the accompanying
drawings.
7. In a writing machine of the type herein set forth, a swinging rail O adapted
to be depressed by the motion of each type key and having connected there with a
friction bowl R arranged to release the carriage feed dogs and the impression
hammer or either of them, substantially as herein before described and as illustrated
by the accompanying drawings.
Dated this 11th day of January A.D. 1893.