Driving Device or Motor for Coin Freed and other Automatic Mechanism.
Year: 1898

page_text: Date of Application, 28th May, 1898-Accepted, 30th July, 1898
COMPLETE SPECIFICATION.
Driving Device or Motor for Coin Freed and other Automatic
Mechanism.
I, ALEXANDER SCHWARZCHILD, of No. 7, Kaiserstrasse, Frankfort-on-the-Main,
in the German Empire, Merchant, 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:-
The usual motive power for automatic driving mechanism is generally energy
stored in a spring, that is to say clockworks, operated by a spiral spring under
stress. Apart from the circumstance that the period of automatic action of a
spring motor is very limited, the winding up of such devices requires considerable
force for the operation of large works such as in an orchestrion and the like, the
regulation of the running is effected with difficulty, if at all, in short such devices
are attended with disadvantages which are due to the use of springs as a source
of power.
This invention is designed to remedy such disadvantages and relates to driving
devices or motors, which give out power to mechanism to be driven for long
periods, say months or years, even when the power required is very great, in con-
sequence of the source of power used being always under pressure.
In order that this invention may be the better understood I now proceed to
describe the same, reference being had to the accompanying drawings, and to the
letters and figures marked thereon.
•
Fig. 1 is a side view
Fig. 2 is an end view, and
Fig. 3 is a plan of the motor.
A distributing cylinder of consisting two parts A1, A2 of different diameters
is provided in its interior with a piston rod a, the free ends of which carry
pistons a¹, a, corresponding to the diameters of the parts A¹, A2. The large
cylinder part A2, has at one part a longitudinal slot 6 in which a stepped slide c,
connected rigidly with the piston rod a, is adapted to slide within the limits of
such slot during the movement of the piston. During rest the piston rod a and
the slide c occupy the positions shewn in Fig. 2, in which the small piston a¹ is
situated at the right hand end of the cylinder A¹, the lowest step c¹ of the slide c
engaging against a projection d' of a disengaging lever d and is thus prevented
from making a horizontal movement in the direction of the arrow shown.
The agent forming the operative force of the described motor may suitably be
any gas under pressure. In the present case however the most suitable agent is
for various reasons, liquid carbonic acid, which by being contained in a steel
cylinder can be easily kept in any suitable place. Of course the cylinder contain-
ing the carbonic acid must be provided with a reducing valve and its contents must
be connected by a pipe e with the front of the cylinder A¹.
A small tube f branches off from about the middle of the cylinder shell A' and
ends in a second, governing cylinder G, which is smaller than and parallel to the
cylinder A¹, A³.
This governing cylinder G has a piston rod provided with two pistons g¹, g²,
and its axis corresponds with two perforations in the cylinder covers of two work-
ing cylinders H, and H¹ arranged at the ends of the governing cylinder G. The
pistons h, h¹ of the working cylinders H & H are connected to each other by
common piston rod 2 having teeth at two sides and transmitting its longi-
a

page_text: respectively, situated loose on the bearing axles and , being adjustable longitu-
dinally, subjected to spring pressure, and operated by pins m engaging in grooves.
The transmission of the rotary movement to the main driving axle L is effected
by an intermediate gearing op p².
When the piston rod h is moved in one direction, one pinion, for instance k,
transmits this movement to the axle /, the pinion boss acting as operative carrier
half; while the other pinion is rotated loosely in opposite direction by the rack,
and engages after completion of the rotation in the half coupling under the
pressure of a spiral spring. Exactly the same operation takes place in opposite
direction during the second opposite advance of the piston rod h² so
rotation of the gearing takes always place in the same direction.
that the
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is:-
1st. Driving mechanism for clock works and automatic apparatus of all kinds,
particularly applicable for coin-freed machines, in which the insertion of a coin,
or operation of a disengaging lever d, successively disengages an arresting
device c c d connected with the piston rod a of a differential cylinder A' A² so
that the smaller of two pistons which is under pressure of a gaseous fluid, is
disengaged and driven forwards whereby communication between the medium of
pressure is effected with a second distributing cylinder G, provided with two pistons
with piston rod, in consequence of which the gaseous fluid is brought alternately
before the pistons h h of two working cylinders H and H₁ connected together by
a rack shaped piston rod h² whereby a corresponding longitudinal movement of the
former is effected, in order to rotate the gearing J of the apparatus, which engages
with the rack shaped piston rod h³ until a return connection K to the cylinder A²
has been effected in front of the larger piston a² for the gaseous fluid, whereby
the pressure of the smaller piston a¹ is overcome and the latter is returned to its
original position of rest and the superfluous gas can escape through a slot 6 of the
cylinder A¹ A².
2nd. A form of construction of the driving mechanism claimed in Claim 1, in
which at the advance of the working pistons h and h¹ the piston rod g of the
governing cylinder G, which corresponds with perforations in the covers of the
working cylinders H and H' is moved automatically in order to set free the gas
admission channels on the one hand and to effect an opening for the escape of
the air before the working piston.
3rd. A form of construction of the driving mechanism claimed in Claim 1 in
which the bosses of the cog wheels kk' are situated loose on their axles and are
formed as halves of couplings so that they act as operative carriers at an advance
of the piston rod h² and carry with them the second halves of the couplings which
are under spring pressure and adapted to slide longitudinally, but slide past these
second halves of couplings during an opposite advance of the piston rod h² i.e. are
rotated loosely and thus act always on the driving axle L in the same direction
of rotation, all in order to change the reciprocating longitudinal motion of the
rack shaped piston rod h² of the working cylinders into a rotary motion acting on
the gearing in uniform direction.
4th. A mode of construction of the driving device as claimed in Claim 1 in
which a single working cylinder is arranged instead of two, the two ends of which
single cylinders are connected by pipes f and K direct with the distributing
cylinder A' and A².
D
3100th day of March 1898
FELL & JAMES,
Agents for the Applicant.