Improvements in Force Accumulating Brakes, Principally for Use in Stopping and Starting Vehicles.
Year: 1887

page_text: Date of Application, 23rd June, 1887
Complete Left, 19th Mar., 1888
Complete Accepted, 20th Apr., 1888
Improvements in Force Accumulating Brakes, Principally for Use
in Stopping and Starting Vehicles.
I, FRIEDRICH JORDAN of Altona, in the Kingdom of Prussia, Manufacturer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to brakes accumulating force during the stopping of a vehicle,
for utilizing the so required power for assisting in setting the vehicle again in
motion.
For this purpose one of the axles of the vehicle is provided with a loose brake disc
adapted to be pressed upon the wheel or other part connected therewith for stopping
the wheels by friction. To this brake disc is connected a pulley, the latter being
geared to a pulley upon the other wheel shaft by means of a crossed band. To this
second pulley is connected a hollow drum having in its periphery a slot. A double
lever is pivoted in the drum and extends to said slot where it is connected to a belt or
chain wound around a spring barrel journalled under the vehicle. The inner end of
the above mentioned double lever is connected by a link to one arm of a balance bar
carrying at the ends brake-blocks, and pivoted at its centre excentrically in the drum,
the said brake-blocks passing about the periphery of a brake disc secured to the axle
of the wheels. When the brake is put on the first wheel axle, the brake disc is carried
round with the wheel and the pulley secured to said disc operates through the belt
connection, the opposite pulley on the second axle, the latter revolving contrary to
the axle.
The hollow drum connected to said second pulley is carried round therewith and
the belt is wound on to it from the spring barrel, uncoiling the latter and bringing
the springs into tension until the vehicle is stopped thereby. When the brake is
removed the springs wind up the belt and cause the hollow drum to revolve. This
reversed motion of the hollow drum causes the brake blocks in said drum to press
onto their disc fixed to the axle, so that the power of the springs tends to accelerate
the axle.

page_text: The above described device for utilizing the power may be modified without depart-
ing from the scope of this invention, for instance the balanced arm of the brake blocks
may be pivoted excentrically on the axle and be caused to revolve therewith and to
operate (when desired as hereinafter shown) upon the inner surface of the
hollow drum. The coiling of the springs is caused to react on suitable
lever device, to throw the said balance arm with one block against the drum, the latter
during the continued straining on the springs when stopping the vehicle passes loosely
before the brake block the latter being conveniently shaped therefor.
When starting the vehicle again the drum is revolved by the springs in the
contrary direction and immediately jambs with the brake block causing the axle to be
accelerated through the pressure on the same as mentioned above.

page_text: in Stopping and Starting vehicles.
I FRIEDRICH JORDAN of Altona, in the Kingdom of Prussia, Manufacturer do
hereby declare the nature of this Invention and in what manner the same
is to be performed to bo particularly described and ascertained in and by the
following statement :-
This invention relates to brakes capable of accumulating force during the stopping
of a vehicle and of utilizing the force so acquired for assistance towards setting the
vehicle in motion or driving the same.
Referring to the accompanying drawings
Fig. 1 is a side elevation and Fig. 2 a sectional plan view of the improved apparatus
capable of fulfilling the functions above described.
Figs. 3, 4 and 5 show certain details thereof.
Figs. 6 and 7 are respectively elevation and sectional plan of a modified form of
the apparatus.
One of the axles of the vehicle for instance A is provided with a brake disc e which
loosely revolves on the axle. This brake disc e is rigidly connected with a strap or
chain pulley h and is adapted to be laterally displaced on the axle A by means of the
lever system bk to be moved by hand or foot so that the disc e can be brought in
contact with a braking surface or surfaces m fixed on the axle A or connected to the
wheel D which is fixed on the axle A. To set the brake in action the conductor may
either move, direct, the lever k whereby the disc e is brought into contact with the
braking surface or as shown in Figs. 1 and 2. by depressing the lever b he may over-
come the force of the spring p and so permit the spiral springs which are connected
by their inner extremities to the shaft and maintained continually at slight tension
to bring the brake disc e into gear through the lever d rigidly connected with the
shaft and through rod d¹ and angle lever k pivoted at l.
As soon as the braking surfaces come in contact with one another, the chain pulley h
is revolved with the axle A or wheel D respectively. A similar chain pulley h¹ is
situated loosely on the other running axle A¹ or on a separate shaft under the frame
of the vehicle is geared with the pulley h by a crossed chain g so that when the pulley h
revolves, the pulley is revolved thereby in the opposite direction. This chain
pulley his rigidly connected with a drum or cylinder P. The cylinder or drum P is
hollow and surrounds a friction or brake drum z fixed on the axle A¹ on the side walls
of the drum P and eccentrically thereof are pivoted by pins n n' the two levers o ol
(Figs. 3, 4 and 5) one on each wall, the said levers are connected to each other at the
ends by cross bolts t t¹, which carry, pivoted on them, the blocks xx¹..
When the braking device is not in action the parts occupy the positions shown in
Figs. 1 and 2 the spring p overcoming the fore of the springs s and keeping the lever b
raised and thereby the disc e free from the surface m. The arms o o¹ are maintained

page_text: in the position shown in Fig. 1 by the strap y wound round the spring barrel R, its
outer extremity of which being connected with a cross-bolt 1 carried by the arms 2, 3
the two armed levers 4 and 5 connected together by a second cross bolt 6 and connected
respectively to the levers o o¹ by means of the rods 7 and 8. The cross bolt 1 is
situated in a slot 9 in the periphery of the drum or cylinder P.
As soon as the brake device is in action and the chain pulley is turned with the
drum P stationary thereon in the opposite direction to that of the shaft A' the vehicle
supposed to be moving in the direction of the arrow Fig. 1.
The lower edge of the slot 9 abuts against the cross bolt 1. (Fig. 3) and winds the
strap y upon the drum P as shown in Fig. 4 the rod 7 and 8 drawing the block x
against the circumference of the brake drum z.
As long as the latter rotates with the axle A¹ in the direction of the inner arrow
(Figs. 3 and 4) the block slides on the circumference of the drum z.
As soon
however as the vehicle stops in consequence of the straining of the springs s effected
by the strap y being drawn off the spring barrel R, and the conductor lets loose the
lever for setting the vehicle again in motion, the strap y is again wound upon the
spring barrel and the drum P revolves from the right to the left. The levers o o¹ on
the side walls of the drum P being carried along in the direction of the arrow 10
Fig. 4, jam the block onto the surface of the drum z and so apply force to the latter
in the direction of revolution required to assist in starting the vehicle again in the
original direction.
If the vehicle had been travelling originally in the contrary direction the strap y
would have been wound on the drum R in the contrary direction to that shown by
Fig. 4 and the block al would have been pressed onto the drumm z.
In the modification represented by Figs. 6 and 7 the brake drum zis dispensed with,
but the inner wall of the drum P acts as brake surface and the block a or cl
respectively is pressed onto this inner wall.
The arrangement for moving the chain g is similar to that shown in Fig. 1 and is
therefore omitted in Fig. 6.
Within the drum P is a sleeve W fixed on the axle A¹ on a shoulder w integral
with said sleeve is pivoted the double lever p.
The lever carries at its extremities the blocks a revolvable upon the pins p¹ p²
and rotates when no braking is effected with the sleeve W within the drum P without
the blocks touching the wall of the drum. When the pulley and the drum P con-
nected therewith are revolved in the opposite direction to the axle A¹ as aforesaid the
belt y is wound on the drum and thereby strains the springs s in the barrel R and
fixed with their inner extremities to the axle i and with their outer ends to the wall of
the barrel.
By the straining of the springs s the lever d fixed on the axle i is drawn back and
imparts by means of the rod q its movement to the triple lever L L' pivoted at Z in
the framing of the vehicle.
Corresponding to the direction in which the vehicle is travelling the rod q is
connected with the one end L or other end L₁ of the lever so that it moves by means
of the connecting rod S, the loose grooved sleeve on the shaft A¹ to or from the
sleeve W. The angle lever ff having the pin u on the arm projecting into the
groove of the sleeve N is revolvable about the pivot g' on a shoulder ron the sleeve W
and carries a slit at the inner arm f¹ into which a pin of the double lever p engages.
On the rotation of the axle A' the double lever is taken along by the sleeve W
and maintained in normal position by the angle lever until the pulley is
revolved upon the axle A'. This normal position is represented by Figs. 6 and 7.
When as above described the groove pulley N is drawn outward the double lever pis
turned about pivot v into the position shown by dotted lines in Fig. 6 and the block r
arrives against the inner rim of the drum.
The drum can turn on in the direction of the arrow without a breaking being
effected since the block can move about the pivot p¹ and therefore recede.
When the vehicle stops in consequence of the tension of the springs s the strap y
has been wound round the drum P and, as soon as the spring force comes in action by

page_text: releasing the brake disc e (Figs. 1 and 2) the said strap is drawn off from the drum
again so that the latter is turned in the direction of the inner arrow, the block æ and
the lever p are thereby taken along and the axle A¹ impelled in the same direction.
If the vehicle had been travelling in the opposite direction to that above described
the strap y would have been wound in the opposite direction on the drum, when
actuating the brake, and the rod q would have been connected with the lever arm L¹.
In this case the groove sleeve N is displaced inwardly by the lever d, rod q lever L'
and rod S and the lever p is thereby turned around pivot v in the direction opposite
to that indicated by dotted lines in Fig. 6 so that now the block arrives against
the wall of the drum and is taken along by the latter when the springs are
brought into action.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
In apparatus for stopping and starting vehicles
1. The combination with an axle of a drum P and drum or parts equivalent
thereto and double lover having blocks x x³ adapted to operate in connection with said
parts substantially as set forth.
2. The combination of the brake disc e with springs s adapted to set said brakė
disc in action and spring p adapted to normally counteract the same and to be set out
of action for the purpose set forth.
3. The combination with the drum P shaft A¹ drum z and lever o o' having
blocks substantially as set forth of barrel R springs s strap y and lever system
comprising parts 1, 2, 3, 4, 5, 6, 7 and 1 for the purpose set forth.