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Патент USA US2134770

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`Nov. 1, 1938.
'
A
H_ WEBER
Y
2,134,770
cQNTRoL
Filed April 19, 1937
5
5
INVENTOR.
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BY ¿jm/#wwf
ATTORNEYS.
Patented Nov. 1, 1938
2,134,770
UNITED STATES PATENT OFFICE
2,134,770
CONTROL
Herman Weber, Kalamazoo, Mich., assignor to
Shakespeare Products Company, Kalamazoo,
Mich.
Application April 19, 1937, Serial No. 137,779
12 Claims.
The main objects of this invention are:
(Cl. 711-503)
First, to provide a novel and‘improved struc
ture for control devices of the push and pull
type, wherein looseness and play of the same
in their sliding mounting in all positions is autol
matically taken up.
Second, to provide a device of the type de
scribed which is simple in operation and the
parts are inexpensively produced. ‘
Third, to provide a device of the type de
scribed characterized by elements which auto
matically compensate for wear and maintain
sliding frictional action.
Obviously the degree
,
of the bow may be varied to vary the amount
of force exerted by the spring `I I. y
Objects rel-ating to details and economies of
the invention will appear from the description
to follow. The invention is deñned in the
claims.
A preferred embodiment of the invention is
illustrated in the accompanyingV drawing, where
In assembled relation to the rod 6, the spring
II automatically compensates for any looseness
or play between the rod and the sleeve 3 slidably
receiving the same, rendering'the control device
free from rattling of any kind. In addition,
snug running engagement at all times.
20
controlling movement is to be transmitted (not
shown) and is slotted lengthwise at IU of a
width sui’ñcient to receive a bowed spring wire
element II, one end of which is clamped to the
rod in the slot Il) by upsetting the sides thereof 5
to clamp the spring as indicated at I2. The
other end of the spring II lies loosely in the
groove I0 within the head ‘I and the middle por
`tion thereof is bowed upwardly at I3 to engage
the inner side of the tubular support 3 with a
in:
`
,
.
‘
Fig. 1 is a view in plan illustrating a device
embodying the invention mounted on an instru
ment panel, said panel being shown in section
and broken away.
.
Fig. 2 is a side elevationl partially broken away
and in section on line 2_2 of Fig. 3.l
Fig. 3 is a transverse section on line 3--3 of
Fig. 2.
The present invention relates to provisions of
30 an exceedingly simple nature for taking up play
between the relatively slidable and stationary
parts of a control device of the push-pull type,
the details of which provisions are elementary
in nature and very inexpensively produced and
35 assembled, relying merely on the resilient action
of a bowed spring element to compensate for
loose rit between a slidable plunger rod andthe
element receiving the same. In my structure,
the factor of the eiTect of wear is reduced to
L10 zero inasmuch as the element taking up play and
looseness automatically compensates for rwear on
the same.
Referring to the drawing, reference numeral
I indicates anA instrument panel upon which the
45 control device is adapted to be mounted, the
panel being apertured at 2 to receive a guide
sleeve or tubular support 3 which is threaded
at 4 and provided with an annular facing or ‘es
cutcheon flange 5.
'I'he reference numeral 6 indicates the plunger
rod of the control device, the same having a tight
ñt in a hollow head or adapter l, to which the
linger piece or handle 8 is secured.
'I‘he rod 6 is annularly grooved at 9 to provide
55 a yoke for connection with the element to which
it is impossible for'wear on the spring or rod
to cause looseness and rattling of the parts since 20
the spring will bow furthenoutwardly to com
pensate for any wear occurring or, if necessary,
additional bend may be imparted to the spring
to increase its gripping effect on sleeve 3.
In the embodiment illustrated, the support has
a non-circular opening-that illustrated being of
hexagonal section. The spring II engaging one
of the angles prevents turning or rotary move
ment of the control rod within its support.
The parts of the invention are exceedingly sim 30
ple in character and capable of production at
very low cost.
I have illustrated and described my improve
ments in an embodiment which I consider very
practical. I have not attempted to illustrate or
describe other embodiments or adaptations as it
is believed this disclosure will enable those skilled
in the art to embody or adapt my improvements
as may be desired.
Having thus described my invention, what I
claim as new and desire to secure by Letters Pat
ent, is:
1. In a push-pull control device including a
plunger rod having a push button thereon, said
plunger rod being grooved lengthwise of its axis, ‘
the combination of means in the form of a sup
port slidably receiving said rod, and means to
maintain a close sliding contact between said
means and rod comprising a bowed spring wire
element lying in said groove with the bowed por
tion thereof spaced substantially from the bot
tom of the groove and in frictional sliding con
tact. with the support, one end of said element
being ñxedly secured to said rod and the other
end thereof engaging the rod.
55
2
2,134,770
2. In a push-pull control device including a
plunger rod having a push button thereon, said
plunger rod being grooved lengthwise of its axis,
the combination of means slidably receiving said
rod, and means to maintain a close sliding con
tact between said means and rod comprising a
spring wire element lying in said groove,
ends of said element engaging the bottom of
groove with an intermediate portion of the
10 ment spaced substantially from the bottom
the
said
ele
and
in frictional sliding contact with the first named
means, one end of said element being fixedly
secured to said rod.
3. A control device comprising a plunger rod
15 having an axial recess therein, a wire spring ele
ment lying in said recess and secured to said
rod, and a support member slidably receiving
said rod, said wire spring element engaging the
rod at its ends and being bowed medially of its
20 length, said bowed portion of the element being
spaced substantially from the bottom of the
recess and extending into frictional sliding con
tact with said support member.
4. A control device comprising a plunger rod
25 having a recess therein, a wire spring element
lying in said recess and secured to said rod, and
a support member slidably receiving said rod,
said wire spring element being bent to space a
portion of the same substantially above the bot`
30 tom of the recess, said portion -extending into
frictional sliding contact with said support mem
ber.
5. A control device comprising a support hav
ing a non-circular control rod receiving open
_ ing, a control rod slidable in said opening and
provided with a longitudinal groove, a head
member sleeved on the outer end of said rod
and embracing the outer end of said groove,
said head member being externally shouldered,
40 a finger piece mounted upon said head member
to engage said shoulder, and a bowed spring
approximating in length the length of the con
trol rod disposed with its ends within said groove,
the walls of said groove being clamped upon
the inner end of said spring lying in said groove,
45
the outer end of said spring lying within said
head member, the bowed intermediate portion
of said spring having frictional engagement with
said support to prevent rattling and apply fric
tion and engaging an angle of the non-circular
opening therein to prevent rotary movement of
the rod within the support.
6. A control device comprising a support hav
ing a non-circular control rod receiving open
ing, a control rod slidable in said opening and
bowed spring disposed with its ends within said
groove, the walls of said groove being clamped
upon the inner end of said spring lying in said
groove, the outer end of said spring lying with
in said head member, the bowed intermediate
portion of said spring having frictional engage
ment with said support to prevent rattling and
apply friction.
8. A control device comprising a support hav
ing a non-circular control rod receiving open
10
ing, a control rod slidable in said opening and
provided with a longitudinal groove, a head
member sleeved on the outer end of said rod
and embracing the outer end of said groove, and
a bowed spring disposed with its ends within 15
said groove, the inner end of the vspring being
ñxedly secured within said groove, the outer end
of the spring lying within said head member,
the bowed intermediate portion of said spring
having frictional engagement with said support 20
to prevent rattling and apply friction and en
gaging an angle of the non-circular opening
therein to prevent rotary movement of the rod
within the support.
9. A control device comprising a support, a 25
control rod slidable in said support and pro
vided with a longitudinal groove, a head member
sleeved on the outer end of said rod and em
bracing the outer end of said groove, and a
bowed spring disposed with its ends within said 30
groove, the inner end of the spring being iixedly
secured within said groove, the outer end of the
spring lying within said head member, the bowed
intermediate portion of said spring having fric
tional engagement with said support to prevent
rattling and apply friction.
10. In a control device including a sliding
member, a support member slidably receiving
the sliding member, and means to insure a close
sliding iit between the members, and prevent 4,0
rattling thereof, comprising a bowed wire spring
element secured at one end to the sliding mem
ber, said sliding member having a longitudinal
slot adapted to slidingly receive the other end
of the element with the medial portion of the 45
element spaced substantially above the bottom of
the slot and extending into frictional sliding con
tact with the guide.
11. In a control device including a plunger
member and a support member receiving the
plunger member and means to insure a close
non-rattling sliding fit between the members,
comprising a bowed wire spring element ar
ranged between said members, one of said mem
bers having a slot adapted to receive and en
provided with a longitudinal groove, a head
member sleeved on the outer end of said rod
and embracing the outer end of said groove, and
gage the element along the bottom of the slot,
said element being spaced substantially from the
a bowed spring disposed with its ends within
said groove, the walls of said groove being
clamped upon the inner end of said spring ly
ing in said groove, the outer end of said spring
lying within said head member, the bowed inter
tending into frictional sliding contact with the
other member.
60
mediate portion of said spring having frictional
engagement with said support to prevent rattling
non-rattling sliding fit between the members,
comprising an element arranged between said 65
bottom of the slot by the bow therein and ex
l2. In a control device including a plunger
member and a support member receiving the
plunger member and means to insure a close
and apply friction and engaging an angle of the
members, one of said members having a slot
non-circular opening therein to prevent rotary
adapted to receive and engage the element along
the bottom of the slot, said element having a
portion thereof spaced substantially from the
bottom of the slot and extending into frictional
sliding contact with the other member.
movement of the rod within the support.
7. A control device comprising a support, a
control rod slidable in said support and provided
with a longitudinal groove, a head member
sleeved on the outer end of said rod and em
bracing the outer end of said groove, and a
HERMAN WEBER.
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