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Патент USA US2119638

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‘June 7, 1938.
‘ 2,119,638
Filed March 17, 1956
3 Sheets—$heet I
June 7, 1938.
2,119,638 ‘
Filed March 17. 1936
3 Sheets-Sheet 2
June 7, 1938.
Filed March 17, 1936
3 Sheets-Sheet 3
Patented June ‘7, 1938
Appllcationzltgzclzal'l,(gif?zieliz No. 89,28d
My invention relates to‘ brake controlling of the invention, the numeral 5 denotes the ser
mechanism and has for its primary object to pro- :vice brake pedal 01’ an automobile having thev
vide means for holding the foot brake of an 'au- . usual shank 8.
In accordance withthe present‘
tomobile applied, while the machine is at rest“ invention, the rear edge of the shank 6 has
5 thus eliminating the need for an emergency
to -be engaged by the locking dog 8 pivotally
A further object of the invention is to provide
automatic means for locking the foot pedal operating the service brakes of an automobile in a'
i0 depressed position, so the brakes will remain applied and manually operable means for controlling the automatic means_
formed therein aseries o'f ratchet teeth‘! adapted 5
mounted on the pin 9 supported in the side walls
0f the sheet metal bracket l0. vThe bracket l0
is attached to the ?oor board ll of an automobile,
by means of bolts l2 and has its lower end, in lo
which the pin 9 is Supported disposed adjacent
the shank of the brake pedal.
Another object of the invention is to provide
‘a mechanism of the above-mentioned character
15 which is simple and durable in construction,.reliable and efficient in operation and inexpensive
A bell crank lever
'3 is mounted on the Shaft '4 euppel'ted by the
side walls of the bracket l0 above the dog 8 and
has a relative 1011!! arm Connected at its free 15
end. as at IE, to one end of a ?exible cable or rod
to manufacture,
it and a short arm in the form of a cam I‘! which
Other objects and advantages of the invention
\will be apparent during the course oi.’ the follow-
Contacts With the top 01' the follower plate I!
having depending Side ?anges l9 disposed in
2 O ing description,
straddling relation to the dog 8 and pivotally 20
In the accompanying drawings, forming a part mounted 0n the Pin 9- The deg 3 and plate '8
of this speci?cation and in which like numerals are yieldably Connected together by a U Spring
are employed to designate like parts throughout ’ 20 formed of Wire which is bent eI‘OImd the Pin
the same,
30 mechanism,
9 and has one end connected to the plate H, as at
1 is a side elevation of the mechanism,
2 is a. rear view of the same,
3' is a section taken on line 3-73 of Fig. 2,
4 is a section taken on line 4-4 of Fig. .3,‘
5 1s a, side elevation of another form of
normally urges the dog 8 and plate I8 away from 30
the Shank 6 0f‘ the pedal 5- An electric switch 25
which is interposed in the circuit of the conven~
tional stop light is disposed adjaeentthe lever l3.
so that the cam II ,will engage the push button
Fig. 8 is a side elevation of still another form
of the mechanism,
Fig.- 9 is a top view of the mechanism shown in
26 oi the switch to close the circuit when the lever 35
is actuated. The ?exible cable It, extends
40 of Fig, 3,
Fig. 11 is a side elevation of a further. modi?ed '
form of the invention,
Fig. 12 is an enlarged side elevation of the latch
connected to the ?ange is (if the plate '8, which
Fig. 6 is a side elevation of still another form
of mechanism,
Fig. 7 is a longitudinal section taken on line
1--1 of Fig. 6,
Fig; 8,
1 .
Fig. 10 is a vertical section taken on line Ill-Ill
2|. and its opposite end Connected to the dog 8. 25
as at 22. A coil spring 23 is mounted on the pin
9 having one end connected 'to the side wall of
the bracket II), as at 24, and its opposite end
through a conduit‘ 21 t0 the dash board 278 of
the automobile and is connected to the shank 29‘
of a hand knob 30, the Shank being slidably ‘
mountedlin a sleeve'3l, mounted in the dash- ~10
To operate, the hand knob. 30 is pulled out
wardiy from the dashboard vwhich through the '
mechanism shown in Fig. 11,
cable l6 rocks the lever l3, so that the cam_l'|
Fig. 13 is a similar view showing .the latch ‘ depresses the plate I8 and dog 8 against the ten- 45
mechanism in released position,
Fig. 14 is a perspective view of the latch dog,
Fig. 15 is a perspective view of the follower
sion‘of the spring ‘23, thereby causingv the dog’to
engage the ratchet teeth 1 of the shank B of the
brake pedal 5. The dog 8 through its'yieldable
plate for'the latch dog, '
Fig. 16 is a perspective view of the cam and
connection 20 ‘with the plate, I 8 is permitted to
ride over the ratchet teeth as the pedal 5 is de- 50
lever for operating the same, and,
Fig. 17 is a perspective view of the spring for
pressed to apply the brakes. The dog through
its engagement with the ratchet teeth holds the
the follower plate.
In the ‘drawings; wherein for the purpose of
55 illustration, I have shown the preferred forms
pedal depressed and the brakes applied; until the
knob 30 ispushed inwardly which rocks the‘ lever
l3 and releases the plate l8 and dog 8,so‘th_at the viii
dog I is'moved, out of engagement with the
and returns the hand knob to its, normalposition.
ratchet teeth through action of the spring 28.
In Figs. 11 to 17 inclusive, a further modifica
In Pig. 5, another~ form of the invention is tion of the invention is shown which consists of
sbown‘which diifers from the form ‘shown in Fig. ' a bracket plate 40 which is attached to the frame l, in that the plate II and dog I are podtioned in
of the vehicle by bolts ii at a point adJacent the ’
.the bracket II in a reverse. direction and are
.yieldabiy connected together by a coil spring 32.
connection between the connecting bar l2 '0! the
brake pedal 03 and‘ the rocker shaft 44. The
instead of the U spring 20. In this form .the
rocker shaft 84 carries a link II which establishes ‘
connection between the brake rods 1“ and 01'
connected‘ to the front'and rear brakes oi’ the
In.1"igs.>6 and 7, I have shown still another 9 vehicle. A quadrant '0 is ?xedly mounted on.
form of the invention which includes the bracket. the ‘rocker shaft' .4 providedwith a series oi’ I
switch ? .is'mounted between‘ the side walls of
the bracket ii.
ll having formed between the side wallsthereof
ratchet teeth 60 along its upper edge-which are
a cylinder I8 arranged at an angle with its lower 7 adapted to be engaged by the locking dog 1| piv- >
otally mounted on the pin 1i projecting from the
bracket plate 80. A follower plate 12 having side inder andprojects through anopening 35 in the ‘ ?anges 13 is pivotally mounted on the pin,"
bottom thereof‘for engagement’with the ratchet ‘ in straddling relation to the dog 10 and disposed
teeth ‘I. A head 30 is formed integral with the between the follower plate and. dog is a coil
spring 14 seated in the recess 15 in the top of‘the
upper end of the dog and mounted on the dog be
end disposed adjacent the shank 6 of the pedal 5.
A locking dog 34 is slidably mounted in the cyl
tween the head I‘ 'and bottom of‘ the cylinder is ' 'dogvwhich yieldably holds the dog in engagement
a coil spring 31 which normallygurges the ‘dog with the teeth 69 of the quadrant ‘I. A shoulder
16 is formed transverselyv of the rear end’ of the
away ‘from engagement vwithcthe ratchet teeth.
Mounted within the cylinder on the opposite side -, top face of the dog, which serves'as an abutment
of the head 36 is another coil spring 3|, which for the rear end of the follower plate 12 and‘
establishes yieldable connection, between the
thereby limits the upward movement of the plate
head of the dog and the ball 39 disposed in the with respect to the dog. A coil spring 11 mount
upper ‘end of the cylinder. A lever 40 is pivotal
ed on the pin 1i has one end attached, to one
ly-connected to the upper end of the cylinder by ' of the ?anges 13 'of ,the follower plate and its '
.the pivot, pin 4| having a reversely bent end 42 , opposite end to the bracket plate Eli. This spring
which extends into the- cylinder and terminates in normally exerts, an upward tension on. the fol
acam “for engagement with the ball 39. The lower plate and serves to lift the dog out of en
gagement with the ratchet teeth 69 of the quad
free end of the lever~4li is connected to the flex
iblecable i6 leading to the hand knob 30., vThe rant 68. A cam .18 normally depresses the'fol
head 36 has a laterally projecting lug 44 extend-_ lower plate and is moved into and out of engage
ing through a longitudinal slot 45 in the side of ment with the follower plate bythe shaft 10 ex- "
A the cylinder which guides the movement of the tending from the bracket plate, on which it is
dog and actuates the switch 25.
In operation it will be seen thatby pulling the,
40 cable I‘ the .lever 40 is rocked, ~causing the
cam 48 to engage and depress the ball 19 which
mounted, the shaft being turned by the depend
ing lever 80 which is connected to one end of the ~
?exible cable 8, I connected to the ‘pull rod 42
mounted on the dash board 83 of the vehicle. ‘
In operation, when the pull rod 82 is_ pulled.
“ 1y into engagement with the teeth 1 of the shank ' outwardly the lever 80 is actuated totrotate the
6 of the pedal 5. When the dog is‘depressed the shaft .19 and cause the cam 10 to depress the
spring 31 is compressed and when the lever 40 follower plate 12 against the tension of the spring
is rocked to release the ball, the spring 31 moves 11, thereby permitting the spring 14 to hold the
the dog out of engagement with the ratchet dog 10 in yielding contact with the teeth 88 of
thequadrant 68 so as to secure the brake rods in
In Figs. 8, 9, and 10, I have shown still another their adjusted positions. To release the latch
. through the spring 38 forces the dog 34 outward-'
formvof the invention consisting of a-bracket 46
mechanism, the pull rod 8271s pushed inwardly
mounted within an opening in the floor board‘ of
which actuates the lever 80 to release the cam 18,
the automobile in which is mounted a locking dog
41 pivotally mounted on the shaft 48 supported
» by the walls of the bracket. . The upper end of
V the locking dog is connected by the coil spring
49 to the end of the ?exible cable i6 establishing
yieldable connection betweenthe cable and dog.
"A coil spring 50 is mounted on the shaft 48 hav
whereupon the. followerplate is raisednupward
ly by the spring 11_ which by‘ reason of its rear
end abutting the shoulder 16 of the dog-causes
the dog to be'lifted out of engagement with the
teeth 69 releasing the quadrant. '
It is to‘be understood that the form of my in-,
vention herewith shown and described is to be
ing one end connected to the pin it and its op- ' taken as a preferred example of the same and
60 posite end ‘engaged with the rear edge of the - that certain changes in the shape, size and ar-~
locking dog above the shaft 48, which normally rangement of the parts may be made without
urges the dog out of engagementwith theratchet departing’ from the spirit of the invention or
teeth 1 of the shank‘ of the pedal 5. _ In this
form the shank 52 of the hand knob 53 connected
to the free end of. the cable It is provided with a
the scope of the subjoined claims.
Having thus described-my invention, I claim:-.
1. The combination with a foot brake pedal
notch 54 adapted ‘to engage with the edge of the‘ including a shank, of means for holding the brake
openin'gaii'in. the plate 56 through which the applied, said means including a pivoted dog for
, shank extends,to hold the hand knob in its ‘ex
engagement with said shank tohold the lat
tended position.
ter depressed, a pivotedv follower‘ plate yieldably
Inv operation, when the hand ,knob ,is pulled
outward the cable I‘ through the spring 49 rocks
‘the lockinggdog ,41 into ‘engagement with the
ratchet teeth 1 of the shanki of the pedal. Upon‘
releasing the hand knob the spring Ell moves the
locking dog out of engagement with the teeth
connected with said dog, a springnormallyurg 10
ing said dog out of engagement with'said shank,
and a‘ manually‘controlled lever for‘ moving said '
follower plate and dog to ' operative position
against the tension of said spring.
2. The combination with the braking mech
anism of a vehicle, of a latching device for hold
ing the braking mechanism in its applied position
including a quadrant; adapted to move with the
braking mechanism, said quadrant having a se
ries of ratchet teeth on its upper edge. a pivotal
ly mounted locking dog adapted to engage the
teeth of said quadrant, a pivoted follower plate
disposed over said dog adapted to lift said dog out
of engagement with said teeth when swung up
3. The combination with the braking mech
anism of a vehicle, of a latching device for hold
ing the braking mechanism in its applied posi
tion, including a rack bar associated with the
braking mechanism and moved thereby, a pivoted
locking dog adapted to engage said rack bar, a
follower plate disposed in straddling relation to
said dog and pivotally mounted on the pivot of -
lower plate upwardly, manually controlled means
for depressing said follower plate, and yieldable
means disposed between said follower plate and
move said dog to an operative position.
10 wardly, spring means normally urging said fol
locking dog.
dog, a spring yieldably connecting said dog
plate together, a spring normally holding
dog and plate in an inoperative position
means for depressing said follower plate to
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