Year: 1887

page_text: Date of Application, 8th Aug., 1887.
Specification Accepted, 9th Sept., 1887.
I, CARLOS ACCIOLI DE AZEVEDO BASTO, Rio de Janeiro, Brazil, Student, 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 motor constituting my invention has for its object to replace with advantage
steam or gas motors, by employing compressed and superheated air which is much
more economical.
The machine consists of two cylinders A, A¹, called compressors, in which work
pistons B, B, fitting perfectly tight and provided with valves C, C¹ opening down-
wardly, so that the piston in descending compresses the air, which cannot escape from
the top of the cylinder, & forces it by pipe D into the motor, as will be hereinafter
described (Figs. 1, 2 and 3).
When the piston ascends it exercises no power, as the valves open to permit of the
entrance of atmospheric air to be compressed when it again descends, the operation
being repeated alternately in each cylinder.
The descent of the piston is effected by the weight P, the power of which must
always be greater than that of the pressure it is required to obtain in the motor
cylinder.
The piston rod is provided with teeth forming a rack and receives its upward
movement by a toothed wheel E, through intermediate gearing e¹, e³, e³, et, actuated
by pulley F driven by a strap from the motor.
The action is as follows: When piston B descends the toothed rod or rack being
provided with a tappet h depresses lever I. This lever which is pivotted towards the
centre causes the rod i to move upwards, and throngh a double lever cause the
rod to descend, the upper end of the latter being provided with a roller J' which
actuates the pivotted lever K', serving to effect the shifting of axis 1, 1, carrying the
toothed wheel E¹ and thus disengage the latter from the toothed rod H', whilst at the
same time the wheel E is caused to engage with the teeth of rod H of piston B, which
is thus ready to be raised by the motor.

page_text: In place of roller J', the rod may be connected to the pivotted lever k¹ by a
small connecting rod which will effect the same result (fig. 4).
When the piston B¹ descends the tappet h' actuates the lever I', which depresses the
rod, thus shifting shaft and with it wheel E, which is thus disengaged, while
wheel E¹ is caused to engage the piston rod H' to raise it, and so on.
The air compressed by each piston in its descent is collected in reservoirs beneath,
from whence it is distributed to the motor cylinders by means of slide valves, and to
which a centrifugal governor controlling the supply valves m, m³, regulates the
introduction, according to the speed at which the motor is to be driven.
The power necessary to raise each piston being reduced to a fifth by means of the
gearing above referred to, there remains four fifths of the power to be applied by the
motor to any other work.
The motor has two cylinders, with a comparatively short piston stroke, and it works
at a high speed, regularity being ensured by the action of a rather heavy fly wheel,
which stores up energy so as to prevent any slight variations during the alternating
movements of the compressor pistons, from being felt.
The compressor pistons as well as those of the motor cylinders should be very
carefully constructed, and their spring packing should be well adjusted and turned to
fit the cylinders, so that no loss of air may occur past the pistons.
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. The construction of compressed air motor consisting of one or two cylinders
with well adjusted spring packed pistons, air distributing slide valves actuated by
eccentric rods, connecting rods and cranks which actuate the motor shaft, which is
fitted with a fly wheel and the necessary pulleys, all substantially as and for the
purpose specified.
2. The combination with the motor above described of an arrangement of two air
compressor cylinders with perfectly fitting spring packed pistons for compressing the
air, and provided with valves opening downwards, and with a toothed rod forming
a rack, all substantially as described and shown and for the purpose specified.
3. The combination with the compressors, described of a counterweight serving to
cause the pistons to descend and of an arrangement of gearing, serving to cause them
to ascend again by means of a pulley connected by a strap with a pulley on the motor
shaft.
4. The combination with the compressor cylinders the pistons of which have rods
forming racks, of a shaft movable longitudinally so as to cause two pinions which are
firmly keyed thereto to engage with and be disengaged from the racks, substantially
as described and shown.
5. Automatically effecting the engagement and disengagement of the pinions by
means of a tappet, rods and levers, all substantially as described and shown & for the
purpose specified.
Dated this 2nd day of August 1887.
ALLISON BROS.,
Agents for the Applicant.