IMPROVEMENTS IN BREAKS FOR VEHICLES
Year: 1880

page_text: LETTERS PATENT to Nicolas Talard, of Boulevard Magenta, 47, at Paris, in
the Republic of France, Mechanician, for an Invention of "IMPROVEMENTS IN
BREAKS FOR VEHICLES,"
PROVISIONAL SPECIFICATION left by the said Nicolas Talard at the Office
of the Commissioners of Patents on the 14th December 1880.
NICOLAS TALARD, of Boulevard Magenta, 47, at Paris, in the Republic of France,
Mechanician. "IMPROVEMENTS IN BREAKS FOR VEHICLES."
According to my Invention I construct' break apparatus as follows:-On the
framing of the vehicle is fixed a metal bracket having a ring shaped part in an
inner groove, within which is a loose ring shaped piece capable of turning round
therein with a moderate amount of friction. For introducing this ring into its
place the ring shaped bracket is formed in two halves bolted together. The loose
ring has at one part of its circumference a strong pin projecting on either side, and
to this pin is fixed a lever having a pawl taking into ratchet teeth formed on the
circular part of the ring shaped bracket, the end of a rod which is connected to the
break gear of the carriage being pivotted to the said pin. Thus when the breaks
have to be applied by a pull upon the before mentioned connecting rod, this
movement is effected by moving the lever round with the loose ring acting as a
fulcrum, thereby causing its lower end to draw the connecting rod in the required
direction while the upper end of the lever moves over the ratchet teeth of the
bracket, and is locked therewith by means of the pawl. The pawl is connected by
a rod to a bell crank lever on the upper end of the break lever, so that by grasping
such bell crank with the same hand that holds the break lever, the pawl may be
drawn out of gear with the ratchet so as to allow the break lever ring, and
connecting rod to be moved back again in order to put the breaks out of action.
The connecting rod has a screw coupling, by which its length may be shortened
to compensate for the wear of the break blocks.
'
The end of the connecting rod is attached at the axle of the road wheels to two
other rods or chains that extend to near each end of a crossbar suspended from the
framing of the vehicle and carrying the break blocks.

page_text: centre of motion than the handle of the lever D this will operate with considerable
power to apply the breaks, the action being as though the ring B were an excentric
mounted on the end of the rod E, E', and turning in a fixed strap A, instead of the
strap being attached to the rod E, and the excentric B being made to revolve on a
fixed axis. It will be evident that the more the lever is moved over in the direction
of the arrow the greater will be the power of the excentric in applying the breaks,
and retaining them so applied. For releasing the breaks the pawl S is raised out
of gear with the ratchet teeth, and the handle is moved forward. The rod E may
be adjusted in length by having its screwed end connected by nuts G to the loop
of E. Fig. 4 shews diagrammatically how the above described apparatus can be
applied to a vehicle. H represents the attachment of the rod E, Fig. 1, to a rod or
chain H, K, leading to a pin on the axle of the wheels, where it is connected to
rods or chains KL, KM, from either end of the transverse bar carrying the break
blocks P, P, the bar being suspended by links from the body of the vehicle.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I claim,―
First. The use of break apparatus consisting of the ring or eccentric B pivotted
to the break rod E, E¹, and capable of being rotated in the fixed framing A, A', by
any suitable mechanism, substantially as and for the purpose herein set forth.
Second. The combination of the frame A, A¹, ring B, lever D with pawl S, taking
into ratchet teeth F and break rod E, constituting a mechanism for applying the
breaks of vehicles, substantially as herein described.
In witness whereof, I, the said Nicolas Talard, have hereunto set my hand
and seal, this Fourth day of June, in the year of our Lord One thousand
eight hundred and eighty one:
NICOLAS TALARD. (L.S.)