IMPROVEMENTS IN APPARATUS FOR IMPARTING STEP BY STEP MOTION TO PARTS OF MECHANISM
Year: 1883

page_text: LETTERS PATENT to Orlando William Frederick Hill of Pembroke Villa,
Queens Road, Norbiton in the County of Surrey for an Invention of
"IMPROVEMENTS IN APPARATUS FOR IMPARTING STEP BY STEP MOTION TO
PARTS OF MECHANISM
"
PROVISIONAL SPECIFICATION left by the said Orlando William Frederick
Hill at the Office of the Commissioners of Patents on the 28th December
1883.
ORLANDO WILLIAM FREDERICK HILL of Pembroke Villa Queens Road Norbiton
in the County of Surrey "IMPROVEMENTS IN APPARATUS FOR IMPARTING STEP
BY STEP MOTION TO PARTS OF MECHANISM
"
This invention has for its object improvements in apparatus for imparting step
by step motion to parts of mechanism
For this purpose I employ a wheel or disc mounted upon an axis and carrying a
circle of pin teeth or projections-These pins (or equivalent parts) are acted upon by
a pair of levers, which are so mounted that they can move in a plane at right
angles to the axis.
One of these levers, which I will call the driving lever has upon it two acting
surfaces which are approximately at right angles.
One of these surfaces during the forward movement of the lever acts against one
of the pins upon the disc, and so it moves the disc round; this it does until the
next pin comes against the second face upon the lever which stops the further
forward movement of the lever and the rotation of the disc.
The second lever, which I will call the spring lever faces the driving lever and
its spring urges it forward towards this lever. This prong lever has also two
acting faces-One of them is so inclined that when the lever moves forward by the
operation of the spring it produces a rotary movement of the disc in the same
direction as results from the operation of the driving lever.-The movement

page_text: continues until the second face upon the spring lever comes against another of the
pius upon the disc: the spring lever and disc are thus brought to rest.
The two levers act alternately, first the driving lever in its forward movement
produces its partial rotation of the disc forces back the spring lever and sets the
disc into position for the spring lever to operate when the disc is next set free by
the retirement of the driving lever. When the spring lever in turn operates it
produces its movement of the disc and sets the disc into position for the driving
lever again to act effectively upon it.
The driving lever may be operated mechanically or by the attraction of an
electric magnet or otherwise-It is obviously not essential that the pins should be
set in a circle upon a disc; they may be set in a straight line upon a bar, capable
of longitudinal movement, but the wheel or disc rotating about an axis will usually
in practice be more convenient.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Orlando William Frederick Hill in the Patent Office on the
27th June 1884.
ORLANDO WILLIAM FREDERICK HILL of Pembroke Villa, Queens Road, Norbiton,
in the County of Surrey "IMPROVEMENTS IN APPARATUS FOR IMPARTING STEP
BY STEP MOTION TO PARTS OF MECHANISM
23
This Invention has for its object improvements in apparatus for imparting step
by step motion to parts of mechanism.
For this purpose I employ a wheel or disc mounted upon an axis and carrying a
circle of pin teeth or projections. These pins (or equivalent parts) are acted upon
by a pair of levers, which are so mounted that they can move in a plane at right
angles to the axis.
One of these levers, which I will call the driving lever has upon it two acting
surfaces which are approximately at right angles.
One of these surfaces during the forward movement of the lever acts against one
of the pins upon the disc, and so it moves the disc round; this it does until the
next pin comes against the second face upon the lever, which stops the further
forward movement of the lever, and the rotation of the disc.
The second lever, which I will call the spring lever faces the driving lever and
its spring urges it forward towards this lever. The spring lever has also two acting
faces, one of them is so inclined that when the lever moves forwards by the
operation of the spring it produces a rotary movement of the disc in the same
direction as results from the operation of the driving lever. The movement
continues until the second face upon the spring lever comes against another of the
pins upon the disc; the spring lever and disc are thus brought to rest.
The two levers act alternately, first the driving lever in its forward movement
produces its partial rotation of the disc, forces back the spring lever and sets the
disc into position for the spring lever to operate when the disc is next set free by
the retirement of the driving lever. When the spring lever in turn operates it
produces its movement of the disc, and sets the disc into position for the driving
lever again to act effectively upon it.
The driving lever may be operated mechanically or by the attraction of an
electric magnet or otherwise.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevation and Figure 2 is a side elevation of my step by step
mechanism as I prefer to construct it.
a is an axis which may carry a pointer or may give motion to a train of counting
wheels or other mechanism as may be required. b is a wheel or disc fixed on the
axis a and b b¹ are pins evenly ranged around the wheel or disc b. The driving
lever is marked c it is able to turn about the pivot or axis c* and this driving
lever receives and transmits the successive impulses by which the step by step
movement is to be obtained. The driving lever is shewn in one of its extreme
positions by full lines in Figure 1 and in the other extreme position it is
represented by dotted lines. The driving lever may be moved in one direction
by a finger key and in the other by a spring causing its return when the finger
key ceases to be pressed upon. Or the driving lever may be moved electrically,
pneumatically, mechanically or by other well known means as may be most suitable
in each case.

page_text: The driving lever c has a surface c¹ which I call the propelling surface, it turns
the wheel partly round, as the lever passes from the position indicated in full lines
to the position represented in dots, this it does by pressing against one of the
pins b. The lever c has also a surface c² which I call the stop surface, it stops the
further rotation of the wheel when the lever reaches the dotted position, for then
the following pin on the wheel comes to bear directly upon the stop surface. No
further movement of the wheel b can then take place until the lever c retires. dis
the other lever which I call the spring lever, but it is not essential (although
generally convenient) that it should work with a spring, it may on the contrary be
operated by a weight. This lever also has two acting surfaces d¹ and d. I
call the propelling surface and d² the stop surface.
When the wheel b has been moved round by the advance of the driving lever o
to its dotted position as already described, the spring lever d will have been forced
hack and the parts will occupy the positions in which they are shown in Figure 3.
The propelling surface d' is now bearing against one of the pins b¹ and as soon as
the wheel is set free by the return of the driving lever the spring lever by the
reaction of its spring will return and will move the wheel further round. This
motion continues until it is arrested by the following pin upon the wheel coming
up to the stop surface d² of the spring lever. The wheel is thus held until another
forward movement of the driving lever forces the wheel round against the
resistance of the spring lever. The operation of the driving lever continues until
the pin on the wheel which is bearing against the spring lever passes over the angle
on the spring lever which separates the stop surface d² from the propelling
surface d. Thus each double movement of the driving lever results in the wheel
making two forward steps which together equal the angular distance from pin to
pin. The wheel has a dead beat being always under the control of the levers.
Figure 4 indicates another form of spring lever, it has a separate spring in place of
the stem of the lever itself serving as the spring.
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
I claim. Apparatus imparting step by step motion and consisting of a wheel or
disc with pins, teeth or projections, a driving lever with a propelling surface and a
stop surface and a spring lever also with a propelling surface and a stop surface
substantially as described.
In witness whereof I the said Orlando William Frederick Hill have hereunto set
my hand and seal this Twenty fourth day of June in the year of our Lord One
thousand eight hundred and eighty four.
מזג זAn
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