Improvements in Power Transmitting Devices.
Year: 1899

page_text: Date of Application, 11th Sept., 1899
Cinta Sonnification Left 11th June, 1900-Accepted, 21st July, 1900
Date of Application, 11th Sept., 1899
Complete Specification Left 11th June, 1900-Accepted, 21st July, 1900
PROVISIONAL SPECIFICATION.
Improvements in Power Transmitting Devices.
We, VARSONOPHY ALEXANDROFF, Peasant, and SERGIUS STRAKHOFF, Law
Candidate, both of Ligovka 10, St. Petersburg, in the Empire of Russia, do
hereby declare the nature of this invention to be as follows:-
The invention has for its object a new method of transmitting the pressure
acting upon the piston of a steam or any other engine directly to the working
shaft by means of a screw and nut device.
This method is illustrated by the accompanying drawings of which Figure I
is a plan (chiefly in section) of the mechanism embodying the invention;
Figures II are a side view and a transverse section (at line A-1 Figure 1I)
of the inner cylinder; Figure III is a longitudinal section of the outer jacket
Figures IV and V a side view, end views, and a longitudinal section of the nuts;
Figures VI end and front views of the pawls for reversing the motion; Figure
VII a side view of the reversing rod; Figures VIII and IX two transverse
sections on a larger scale of the whole mechanism in two different positions of
the pawls.
This invention is characterised by the hereinafter described combination of
the piston P with the working shaft A in such a manner that notwithstanding
the reciprocating motion of the piston the shaft is turned in a constant direction
and by turning
a handle K this direction is reversed the piston continuing its
reciprocating motion. The direction of the motion of the shaft can therefore
be changed at will.
For this purpose the shaft A is provided on the whole length of the stroke of
the piston with two helical grooves or ways (of a double or multiple character)
in opposite directions (Figure 1). On this part of the shaft two nuts B and Bi
(Figures I IV and V) are placed, the one with right handed screw ways and the
other with left handed, of the same pitch as on the shaft. These two nuts are
located in a cylindrical sleeve C on which an outer jacket M (Figure III) is
screwed, and in the ends of the sleeve C two tubes N and N¹ are screwed, which
retain the nuts B B in the sleeve C and protect the screw on the shaft. The
piston P is keyed on the middle portion of the jacket M. In the sleeve C is an
opening at the ends of which two double pawls 1) D and E E¹ are located
These pawls can be pivotted on shafts o and fixed in the sleeve C and their
ends yy (Figure VI) engage themselves between the teeth or projections
of the nuts B B (Figures IV and V). By the aid of a rod or lever K
(Figure VII) provided with arms or projections the pawls can be disengaged
If for instance the lever K is in
from the nuts B B in two different manners.
the position represented by Figure VII, its arms and k¹ pressing upon the
hinder parts of the pawls D and D¹ cause the ends and ¹ of these pawls to
У and y
be lifted above the projections b b of the nuts B and B whilst the ends
0 of the pawls E and E are engaged between the projections 6 b. By turning
the handle 180° the arms k k¹ cause the pawls E E to disengage with the nuts B
21 whilst the pawls D D¹ fall between the teeth 6 61 of these nuts.

page_text: It is obvious that in these two positions of the pawls the shaft A will turn
(by the reciprocating motion of the piston P) in opposite directions.
If the handle K be turned 90° all the pawls will be engaged with the nuts BB
and the whole system will be locked, that is to say, no turning of the shaft and
no motion of the piston is possible in this position.
When the pawls are engaged on one side, the piston P keyed on the jacket M
and being prevented from turning on the shaft by guides (not shown in the
drawing) causes by its movement from left to right one of the projections of
the nut B to press the end of the pawl to the side of the sleeve C
(Figure VIII) whilst the nut B lifts by its projections the end of the pawl D
(Figure 1X) and is free to turn with the shaft.
When the piston P' begins to move in the opposite direction (from right to left)
it causes in the same manner the pawl ] to be pressed between one of the
projections 61 of the nut B₁ and the side of the cylinder C whilst the nut B
lifts the pawl D in turning with the shaft. Similar movements take place but
in opposite directions when the pawls E E are engaged with nuts B and B by
the arms of the rod K.
Thus a continuous rotation of the shaft A is obtained and the direction of this
rotation can be changed at will.
Dated this 7th day of September 1809
CARPMAEL & Co.,
Agents for the Applicant.
Improvements in Power Transmitting Devices.
We, VARSONOPHY ALEXANDROFF, Peasant, and SERGIUS STRAKHOFF, Law
Candidate, both of Ligovka 10, St. Petersburg, in the Empire of Russia, 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 invention has for its object a new method of transmitting the pressure
acting upon the piston of a steam or any other engine directly to the working
shaft by means of a screw and nut device.
This method is illustrated by the drawings accompanying the Provisional
Specification of which Figure I is a plan (chiefly in section) of the mechanism
embodying the invention; Figures II are a side view and a transverse section
(at line A B Figure II) of the inner cylinder; Figure III is a longitudinal section
of the outer jacket; Figures IV and Va side view, end views, and a longitudinal
section of the nuts; Figures VI end and front views of the pawls for reversing
the motion Figure VII a side view of the reversing rod; Figures VIII and IX
two transverse sections on a larger scale of the whole mechanism in two different
positions of the pawls.
This invention is characterised by the hereinafter described combination of
the piston P with the working shaft A in such a manner that notwithstanding
the reciprocating motion of the piston the shaft is turned in a constant direction
and by turning a handle K this direction is reversed the piston continuing its
reciprocating motion. The direction of the motion of the shaft can therefore
be changed at will.
For this purpose the shaft A is provided on the whole length of the stroke of
the piston with two helical grooves or ways (of a double or multiple character)
in opposite directions (Figure 1). On this part of the shaft two nuts B and B₁
(Figures I IV and V) are placed, the one with right handed screw ways and the

page_text: other with left handed of the same pitch as on the shaft. These two nuts are
located in a cylindrical sleeve C on which an outer jacket M (Figure III) is
screwed, and in the ends of the sleeve C two tubes N and N¹ are screwed, which
retain the nuts B B in the sleeve C and protect the screw on the shaft. The
piston P is keyed on the middle portion of the jacket M. In the sleeve C is an
opening at the ends of which two double pawls D D and E E¹ are located
These pawls can be pivotted on shafts o and of fixed in the sleeve C and their
ends yy (Figure VI) engage themselves between the teeth or projections_b
b of the nuts B B (Figures IV and V). By the aid of a rod or lever K
(Figure VII) provided with arms or projections the pawls can be disengaged
from the nuts B B in two different manners. If for instance the lever K is in
the position represented by Figure VII, its arms and pressing upon the
hinder parts of the pawls 1 and 1 cause the ends and of these pawls to
be lifted above the projections b¹ of the nuts B and B whilst the ends y and y¹
of the pawls E and E are engaged between the projections bb. By turning
the handle 180° the arms kk cause the pawls E E to disengage with the nuts B
B1 whilst the pawls D D fall between the teeth bb of these nuts.
It is obvious that in these two positions of the pawls the shaft A will turn
(by the reciprocating motion of the piston P) in opposite directions.
If the handle K be turned 90° all the pawls will be engaged with the nuts BB¹
and the whole system will be locked, that is to say, no turning of the. shaft and
no motion of the piston is possible in this position.
When the pawls are engaged on one side, the piston P keyed on the jacket M
and being prevented from turning on the shaft by guides (not shewn in the
drawing) causes by its movement from left to right one of the projections of
the nut B to press the end of the pawl D to the side of the sleeve C
(Figure VIII) whilst the nut B₁ lifts by its projections the end r¹ of the pawl D¹
(Figure IX) and is free to turn with the shaft.
When the piston P begins to move in the opposite direction (from right to left)
it causes in the same manner the pawl D' to be pressed between one of the
projections of the nut 13' and the side of the cylinder C whilst the nut B
lifts the pawl D in turning with the shaft. Similar movements take place but
in opposite directions when the pawls E E¹ are engaged with nuts B and B¹ by
the arms of the rod K.
Thus a continuous rotation of the shaft A is obtained and the direction of this
rotation can be changed at will.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In a motor engine the combination of a shaft A on which are two systems
of helical ways of opposite directions with two nuts on the shaft connected with
a piston and alternately locked in a working position in such a manner that the
nut with right screw ways is locked when the piston moves in one direction, and
the nut with left screw ways is locked when the piston moves in the opposite
direction.
2. In a motor engine characterized by the Claim 1, a mechanism for alternately
locking and unlocking the nuts, consisting of a series of pivotted pawls D 11
and EE, the ends and yy of which are alternately pressed between the
projections of the nuts and the corresponding side of a cylinder C which is
fixedly connected to the piston P.
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L T1000