Improvements in Reversible Wheel Gear for Power Accumulating Brakes for Restarting Tramcars and other Vehioles and for Winding Engines.
Year: 1897

page_text: Date of Application, 31st May, 1897-Accepted, 20th Nov., 1897
COMPLETE SPECIFICATION.
Improvements in Reversible Wheel Gear for Power Accumulating
Brakes for Restarting Tramcars and other Vehioles and for
Winding Engines.
I, PETER JENSEN, of 77 Chancery Lane, London, Chartered Patent Agent, do
hereby declare the nature of this invention, a communication to me from abroad
by Bruno Freiherr von Steinttcker of Laubon Sileoia German Empire Mine Owner,
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:-
This invention refers to a reversible wheel gear device chiefly applicable to
power accumulating brakes for enabling the spring that performs the braking
action to be utilized as a means for starting the vehicle again. For this purpose
that one of two tooth wheels which is connected to a spring is arranged to turn
around an axis about vertical to a plane which passes through the two parallel
axes of the said two wheels.
On the accompanying drawing is shewn such a wheel gear device in various
forms Fig. 1 being a side view of one form applied to a horse tramcar, Fig. 2
a section vertical to the rail wheel axle, Fig. 3 a section on line Fig. 2, Fig. 4
a plan belonging to Fig. 3 and Fig. 5 a section vertical to the tram wheel axle
and through the spring casing, turned 180° from the position shewn in Fig. 2.
Fig. 6 is a section on line y y Fig. 1.
On each rail wheel axle a is keyed a tooth wheel 6 Figs. 1 and 2; this wheel
gears with a toothed rim c of the spring casing d, which latter is carried by a
horizontal pine in a frame f. This frame can turn round the vertical
gudgeons gh Figs 1 and 3 which are supported in the fork frame i that is sup-
ported by the two tram wheel axles a a see also Fig. 1. The pin e cannot tuin
in its frame f and has fixed to it the inner end of a spiral spring, the other
end of which is fixed to the spring casing. Supposing now that the carriage
runs in such a direction that the axlo a with the wheel fixed thereon turns
as indicated by the arrow 2 Fig. 2 and supposing that the tooth rim c is in gear
therewith it will turn in the direction of the arrow 1 Fig. 2 whereby the spiral
spring will be put in tension. If the car after a stoppage has to be moved
back, the spring k would have to turn the last named tooth wheel b in the opposite
direction to that of the arrow 2. For this purpose after a stoppage it would
only be necessary to lock the tooth rim or to unlock it again, which could be
done for instance by a bolt 7 passing down vertically in a tooth space of said
tooth rim c as shewn in Figs. 2 and 3. This bolt is worked by a lever and
rod mn from the driver's seat see also Fig. 1. But as soon as the vehicle is
to start forward again, the spring casing a or the tooth rim c has to be turned
around a vertical axis as stated in the beginning. Hence the frame f which
carries the said spring casing has a worm wheel o keyed on to its upper pivot h,
and in it gears a worm p Figs. 3 and 4 which by bevil gearing st and spindles gr
is turned from the driver's seat Fig. 2. The bolt at its bottom end is tapered
or so shaped as to enter the tooth space. In order then to cause a pull in the

page_text: forward direction the tooth rim c has to be turned around its vertical axis and
the bolt has to be lifted out after its engagement with the wheel rim.
In this example as well as in those now to be described the vertical spindle T
for shifting or fixing the spring box d is so arranged on the frame i supported
by the tram wheel axles, that the said spindle and frame form a separate device
from the body of the car and that the shaking of the latter does not influenco
the said adjusting gear. Hence, as seen in Figs. 1, 2 and 6 the rod n worked
from the driver's seat is enclosed in a column in the upper end of which is pro-
vided a nut with hand wheel 2, the nut being able to turn but not to work
up and down in the column, see Fig. 6, by reason of a pin v passing half through
an annular recess in the nut. This column is as shewn in Fig. 1 provided
with two bearings for the vertical spindle r of the aforesaid bevil gearing st;
Baid spindle has a handler for turning it round by.
In another arrangement, Figs. 7 8 and the bolting is effected by means of
a brake block 1, which is coupled to one arin of a rod bent at an angle. To
this rod is connected the fork end m of a lever which at the other cud m¹ is
jointed to a lever m that can be reversed by a screw, nut and hand wheel as in
the previous example. The brake block is coupled to the bent end of the rod 79
by a cross pin 16 working in a half mund annular recess in the rod. The
brake block has wedge shaped teeth 25 which engage with wedge shaped
grooves in a wheel on the spring casing d Figs. 7 and 8. The rod with the
frame and pivot h is turned around its vertical axis by means of the worm
wheel o, which is operated by the worm p, driven by spindle q tooth wheel
gearing and vertical spindler with crank handle ri.
In yet another form Figs. 10 to 14 the reversing and coupling of the spring casing d
or its tooth rime is effected merely by the vertical spindler with its crank
handler. By means of arms i from the fork frame i supported by the two
tram wheel axles a a an annular cam I of U section is fixed to the said frame see
Figs. 10-13; as shewn in Fig. 13 a horizontal arm L¹ of an angle shaped
bolt L L engages in the hollow of the annular cam. The vertical end of said
bolt is guided vertically in the frame f carrying the spring casing d. The latter
is provided with a brake rim d' having as an example two brake blocks K Fig. 12,
which are normally kept off the brake rim d' by the helical springs S, upon the
stems K of the blocks which have inner heads Kª. These latter co-operate with
the conical part of a sleeve M Fig. 13 on the boss of the spring casing d;
the sleeve M can slide on the feather d³, when moved by the bolt L' L' the peg L
of which engages with the screw thread Mª of the sleeve M. As shewn in Fig. 10
and 14 the ring I is bent in such manner that this engagement takes place as
soon as the teeth of the rim c on the spring casing gear with those of the wheel b.
When the spring casing d has turned a certain number of times around its
gudgeons e, the brake blocks K. have by the cone M¹ of the sleeve M been pushed
against the brake rim and the spring casing d will be held fast. This braking
is to be continued until the frame f has been turned so far that the tooth rim c
gets out of gear with the tooth wheel b, but they will come into gear again as
soon as a turning of 180° has been effected as shewn by the arrow in full lines in
Fig. 14. When the teeth are in gear the brake is to be taken off. Hence ac-
cording to Fig. 14 the annular cam I consists of an upper and a lower half, with
intermediate sloping parts. To take the brake off for travelling backwards the
arm L of the bolt L L has to be moved in the direction of the dotted arrow
Fig. 14. It is assumed that either the cone M¹ is comparatively obtuse so that
the springs S can move the sleeve M back, or, as shewn on Fig. 13 a flat spring B
is used against the flauge M³ which causes the sleeve to go back into the position
shewn in full lines. Care is also taken in this construction that a fracture is
prevented when the nose L³ of the angle bolt L' L is brought into gear; for
the annular cam I is at the sloping part which causes the down motion of the
bolt L' La provided with a block I which can slide in a casing 18 against the

page_text: effort of spring 19. Hence when the point L³ does not at once enter a screw
thread the bolt will recede.
When applied to a winding engine the tooth wheel b may be secured to the
winding drum or on the axle thereof or other convenient part of the driving
gear.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. A reversible wheel gear device comprising a tooth wheel b capable of gearing
with a tooth rim c on a spring casing capable of turning around its axis parallel
to that of the tooth wheel band also around an axis that is about vertical to
the plane of the two aforesaid parallel axes, substantially as and for the purpose
set forth.
2. The construction of reversible wheel gear device described with reference to
Figs. 1 to 6 as applied to a vehicle.
3. The construction of reversible wheel gear device described with reference to
Figs. 7 to 9 as applied to a vehicle.
4. The construction of reversible wheel gear device described with reference
to Figs. 10 to 14 as applied to a vehicle.
Doted this Thirty-first day of May 1897.
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.