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Патент USA US2107565

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Feb. y8, 1938.
c. E. FlsETTE
Filed Oct. 28. 1936
4)/‘5 “7" 24 l; L5’
im» CHARLES E.F|ss‘r1's ~
Patented Feb. 8, 1938
Charles E. Fisette, Los Angeles, Calif.
Application October 28, 1936, Serial No. 108,031
2 Claims. (Cl. 188.142)
An object of this invention is to provide a the movement of master plunger Iii and to govern'
brakeA cylinder control placed between the rear the necessary stroke of the plunger in the master
cylinder I2 for the best adjustment ofA different
end of an automobile- and a trailer to so regu
late. the brakes on the trailer without- any strain
5 whatsoever upon the brakes of the automobile.
Another object' is to provide a device which
shall be of simple construction and therefore of
A friction
washer 9 rests against .the
, , adjusting
f; > 5'
nut 8 and is heldÍ in place by a tension spring lo '
_that is guided by a spring cup II thatiitsfsmigly
at the bottom of the bore 1. .
inexpensive manufacture, and yet which will
internally threaded bore ‘I to provide 'a bearing '
guide forv the master cylinder connecting rod
I5 that is provided with an adjustingnut I6 for’A "
the connecting pin I1 that contacts'l the end of 15"
the master plunger 6 so that whenever‘the master
yplunger B is moved forward or backward it >op-- L. ,
erates the master cylinder I2 to apply or release
the brakes not shown ofthe trailer I through ` ‘
'I'he accompanying drawing illustrates the in
nut I6.
’ The connecting pin I1 is threaded as at Ila .y
Figure 1 is a fragmental side elevation of a
¿5 trailer and automobile showing how the inven
tion is applied to the trailer frame tongue and
shows diagrammatically the method of connect
ing the invention to the master brake cylinder
which is also shown.
Fig. 2 is an enlarged fragmental horizontal sec
tion through the trailer tongue showing the in
vention partly in section 'with a fragment ofthe
master cylinder fixed thereto and methodof fix
into the adjusting' nut I6 to compensate for -wear 25
for the life of the device.
A shut off valve I9 is provided in the ñuid line
I2a at the back of the master cylinder I2 to
nullify the brake action on the trailer I if so de
The plunger 6 is provided with a tapered _shoul
der 20’ that abuts against the master plunger
body 5 as shown in Figs. 2 and 3 of the drawing
ing the master plunger body to the trailer tongue.
and a reduced portion 2 I > forms a link to connect
Fig. 3 is a» view analogous to Fig. 2 showing
the master plunger in a retarded position and
connection 22 in'Fig. lvof the drawing.
omitting fragments of the master cylinder and
the plunger to the automobile 2 as shown, at the 35
To permit a smooth sliding ñt at all times of
Fig. 4 is a section on the line 4--4 of Figure 3.
Fig. 5 is a section on the line 5---_-5 of Figure 3.
the plunger B in the master cylinder plunger
body 5 a grease tap 23 is provided.
Bolts 24 are provided to hold the master plung- 40
The reference numeral I designates the front
er body ‘5 fixed to the trailer tongue l.
trailer tongue.
une ‘2a.
The spring adjusting nut 8 is provided with a Y, 'I
' bore I8 that formsv a guide for the adjusting '
by bolts la to the master plungerv body' sand is. _mf
provided with a unit M that extends into thelg‘
vention may appear from the accompanying
20 drawing, the subjoined detailed description and
the appended claims.
A master cylinder I2 is shown held in 'positionY ¿
prove thoroughly practical and emcient in use.
Another object of the invention is that the
device is so constructed and arranged to operate
brakes of a trailing vehicle, giving the proper
amount of pressure at the required time and will
operate as the automobile slows up or stops.
This invention may have a variety of applica
tions and certain of the features of construction
may be embodied in a variety of structures.
Other objects, advantages and vfeatures of in
end of a trailer I and 2-the rear end of an auto
In operation when theiautomobile 2 retards its
mobile and only such portion thereof illustrated, speed or stops trailer I advances on master
plunger 6 operating connecting pin I'I and cyl
as required to locate the device of my inven
45 tion. The >frame t and trailer tongue il of the
trailer i are, or may be of any approved construc
The master plunger body 5 is so constructed
and arranged to iit snugly in the tongue land
5o houses the master plunger 6 which is slidably
mounted therein.
The master plunger body 5 is provided at one
end with an internally threaded bore 1 that per
` .mits the spring adjusting nut 8 to be threaded
55 therein to permit adjustment of the tension Qi
inder rod I5 causing the master cylinder I2 to 45
I claim:
l. A device of the character set forth adapted
to -be placed; between a towing vehicle and a
trailer comprising a plunger body; a plunger slid- 5o
ably mounted in said plunger body adapted to
apply brakes on the trailer; an internally
threaded bore provided at one end of said
plunger body; a spring adjusting >nut mounted
in said threaded bore; -a friction washer resting 55
against said adjusting nut; a spring cunslid
ably mounted at the bottom of said internally
threaded bore to art as a guide fora tension
spring which is interposed between said friction
Washer and said spring cup that absorbs any
sheçk through vthe plunger; means slidably
mounted in said internally threaded bore ¿icon
necîting said plunger so that whenfgfsaid plunger
is actuated Yit causes the brakes of the trailer to
i 2.Y A device of the charaoter set forth :adapted
to ?be plaçed between a towing vehicle and a
trailer comprising a plunger body; a plunger
- slidably mountedîin said/plunger body adapted
to applyibrakesoin the trailer; said plunger be
ing provided at one end with a tapered shoulder
that abuts against said plunger body; ariV inter
nally threaded bore provided at one end of said 5
plunger body; a'grease tap in said plunger body
that provides means of asmooth sliding ñt at all
times of said plunger andïmeans slidably mounted
in said internally threaded bore connecting said
plunger so that when said plunger is'actuated it 1'0
causes the brakes of the'trailer to operate.
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