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Патент USA US2136500

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Nov. 15, 1938.’
Filed March 12, 19:57
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Patented Nov. 15, 1938
Eugene E. Griese, Shaker Heights, and Frank B.
Davis, Cleveland Heights, Ohio
Application March 12, 1937, Serial‘ N0. 130,548
4 Claims.
This invention relates to control devices such
as are used upon motor vehicles for manual con
trol of internal combustion engines. Automo
bile engines, while ordinarily controlled by a foot
5 accelerator, usually are provided with manual
control in the form. of a pull rod or wire con
nected to the throttle and provided with a button
or knob conveniently located on the dash or else
where, by means of which the driver can control
10 the engine with his hand, either to. rest his foot
or for any other reason. The rod is pulled out
to open the throttle and speed up the engine,
the speed increasing as the rod is pulled out
(01. 744-502)
supply system is conventionally shown at I.
Within it is the usual throttle valve including
a shaft 2 extending to the outside and having an
arm 3 connected by a ‘wire 4 to a rod 5 slidably
mounted in ‘a suitable guide and provided on 5
its outer end with suitable operating means, such
as a knob or button 6 which may be grasped by
the operator for the purpose of pulling out or
pushing in the rod, in the usual manner. The
guide shown is a stationary tubular member 'I 10
fastened to the head portion 8 of a bent strap»
or yoke 9 attached at In to the dash II.
_ According to the present invention, suitable
more and more, and the rod will stay put in any means is provided for adjustably limiting the
15 position to which it is adjusted, either because “pull-ou ” movement of the rod 5, to thereby 15
of the inherent friction of the parts or because limit or control the setting of the carburetor by
of friction orta latching eiTect specially imposed ' the pulling movement of the wire 4 which, of
upon or introduced into the mechanism.
One object of the present invention is to pro
20 vide improved manually operated mechanism of
this kind embodying adjustable means for vari
ably limiting the throttle opening movement, so
that when the knob or other control device is
pulled out to its limit a de?nite and desirable
25 engine speed will be secured, such means enabling
the engine speed to be readily varied by small in
crements to secure any desirable speed.
Another object of the invention is to provide
adjusting and stop means of the character de
30 scribed, which readily may be applied to- cars
already in use or which may be embodied in new
cars, at low cost and by convenient operations,
and which is positive in operation, is durable
and serviceable, and which is not likely to get
35 out of order in service.
Further objects of the invention are in part
obvious and in part will appear more in detail
In the drawing, Fig. 1 represents an elevation
40 of one form of the invention, the carburetor and
throttle parts being shown conventionally; Fig.
2' is a perspective View of the dash attached
parts, on a larger scale; Fig. 3 is a longitudinal
sectional elevation of the parts shown in Fig. 2;
45 Fig. 4 is a detail cross section on the line 4--4,
Fig. 3; and Fig. 5 is a view corresponding to Fig.
3 and showing a modi?cation.
While the invention may be used for the con
trol of any device capable of operation by a pull
50 rod and hand button, and particularly ‘where a
variable setting or adjusting is desirable, for con
venience and in. no sense of limitation, the in
vention has beenv shown applied for use in oper
ating the throttle of an internal combustion en
55 gine. A part of the engine carburetor or fuel
course, moves inside. of the usual ?exible casing
or tube I2. The stop means includes a part car
ried by and movable with the rod 5 and a sta- 20
tionary abutment with which said part cooper
ates, either the moving part or the stationary
abutment being adjustable for varying the set
ting of the carburetor in the manner described.
While the stationary abutment may be adjust- 25
able, the drawing illustrates adjustment of the
part carried by the rod 5. As illustrated, said
rod has sleeved upon it a rotatable adjusting
member in the form of an externally threaded
tube I3, which extends through a- bushing I4 30
fastened to the dash and is provided on the
driver’s side of the dash with an operating part,
such as the knurled head I5. The threads of the
tube It‘ engage with the threads of a nut I6,
which is shown as a square nut, two of its op- 35
posed faces travelling along the ?at faces of the
arms of the yoke 9. While the screw I3 is ro
tatable on rod 5 it is immovable longitudinally _
thereof, being con?ned between a collar I1
pinned to the rod and a suitable shoulder I8 40
engaged by the head I5. As will appear, either
the dash, or a part attached thereto, such as
the end of the bushing I4, serves as the station
ary abutment for cooperation with the nut I6.
In operation, assuming that the throttle is closed, 45v
or in its most nearly closed or idling position,
to increase the speed of the engine by manual
operation, the knob 6 is grasped and pulled out,
carrying with it the rod 5 and wire 4 and open
ing the throttle. Screw I3 travels longitudinally 50
with the rod 5, its threaded portion sliding
through the opening in the bushing I4 until the
nut I6 engages the bushing I 4. Obviously the
amount of sliding movement of the rod 5 until
the nut engages the bushing, determines the ex- 55
tent of opening movement of the throttle and
consequently the speed of the engine when the
knob is pulled all the way out. By rotating the
screw 13 by means of its head I5, the nut l6 may
be adjusted along the rod 5 so as to variably
limit the amount of the throttle opening move
ment and consequently determine the engine
speed when the rod is pulled all the way out.
Fig. 5 shows a modi?ed form of the arrange
10 ment in which one of the two knobs 6, l5, of Fig.
2 is dispensed with as a direct operating means.
erence to the nut IE to open the throttle until
the desired maximum car speed is reached, With
the parts in this position the operator knows that
he can push the rod in to idling position of the
engine throttle with the assurance that if at any
time he Wants to rest his foot by taking it 01? from
the foot throttle he can pull out the pull rod with
his hand as far as it will go, knowing that the
engine speed in the ?nal position of the parts
will not exceed the desired maximum, say twen
ty-flve miles per hour.
In this arrangement the rod 5 has a small head
The construction described is quite simple, is
6a which is seated and fully enclosed within a
recess 20 in the head l5a forming part of or at
15 tached to the screw l3, the head 15a being en
larged for convenient manipulation with the ?n
gers. In this arrangement, to open the throttle
the head l5a is grasped and pulled out, as be
fore, and variable setting of the throttle is ac
capable of adjustment to any desired maximum
engine speed, and prevents accidents which
might otherwise be caused by unintentionally ex
ceeding that speed.
Other advantages of the invention will be ap
parent to those skilled in the art.
20 complished by rotation of the head I5a which
turns the screw and. adjusts the nut as before.
Otherwise the two devices are the same.
While it is not essential, we prefer to use and
have illustrated in the drawing arrangements
in which the adjustable nut and its screw are
provided with left-hand threads, so that the
normal or right-hand rotational movement of
the screw will increase the speed of the engine
when the pull rod is pulled all the way out.
The apparatus described is capable of use in
various ways according to the desires or require
ments of the operator. In the ?rst place, if the
operator does not desire to use or take advantage
of the bene?ts of the invention, he can adjust
the nut Hi to its extreme right-hand position in
Fig. 3, where it contacts with the collar I1. In
this position of the nut the pull rod can be pulled
out to its full extent by pulling on the knob 6,
with the ability to open the throttle to the widest
1. Apparatus of the character described, com 20
prising a pull rod extending through the dash
of a motor vehicle and adapted for connection
to a part to be operated, an abutment on the dash,
a stop device adjustable along said rod and
adapted to .cooperate with said abutment, an op
erator for said stop device also extending through
the dash, said stop device and operator having
a threaded connection with each other, and
means for preventing rotation of the stop de
2. Apparatus of the character described, com
prising a pull rod adapted for connection to a
part to be operated by pull on said rod, said rod
extending through the dash of a motor vehicle
and being provided on the driver’s side of said ‘
dash with an operating head, an abutment device
on the dash adjacent said rod, and a cooperating
stop device movable with said rod, said devices
both being on the engine side of the dash, one of
possible extent, the operator depending upon his
said devices being adjustable lengthwise of said
judgment as to where to leave the parts for the
rod and relatively to its operating head to var
iably limit motion of said rod toward the driver
by engagement of said devices as the result of
pull on said operating head.
3. Apparatus of the character described in 4
claim 2, including a threaded member rotatable
on said rod, said stop device having threaded en
gagement with said threaded member for ad
justment of the stop device.
desired operating conditions.
If the operator desires to use the invention
and to limit throttle opening movement to a po
sition in which the car speed will not exceed a
given maximum, say twenty-?ve miles per hour,
he can make any proper adjustment of the parts
to prevent exceeding that speed. This may be
accomplished in any suitable way. For example,
What we claim is:
the operator can rotate the knob I5 or |5a to move
the nut [6 to its extreme left-hand position en
gaging the stop abutment l4, in which position
the pull rod is con?ned against any longitudinal
motion in either direction. Then, with his foot
o? from the foot throttle and grasping the kob l5
with his ?ngers and pulling out upon the same,
the operator can rotate the knob l5 and gradu
ally adjust the pull rod longitudinally with ref
4. Apparatus of the character described in ,
claim 2, including a threaded member rotatable
on said rod, said stop device having threaded en
gagement with said threaded member for ad
justment of the stop device, and means for pre
venting rotation of the stop device.
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