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Патент USA US2135958

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Nov. 8, 1938.
w. TRAUTNER
2,135,958
ROTARY-SWITCH ASSEMBLY
Filed Oct. 29, 193'?
s Sheets-Sheet
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WAGN TRAUTNER.
NOV. v8, 1938.
w_ TRAUTNER
'
2,135,958
ROTARY SWITCH ASSEMBLY
‘Filed Oct. 29, 1937
3 Sheets-Sheet
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IKVENTORT
WA GN TRA U TNER.
BY
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A TTORNEYS.
Nov.’ 8, 1938.
.
w_ TRAUTNER
2,135,958
ROTARY SWITCH ASSEMBLY
Filed Oct. 29, 1957
'
:5 SheetslSheeL 3~
IN VENTOR.r
WAGN TRAUTNER.
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ATTORNEYS.
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Patented Nov. 8, 1938
2,135,958
UNITED STATES PATENT OFFICE
7
2,135,958
noraay'swrrcn ASSEMBLY I
Warn 'h'autner, Sprlngdale, Ohio, assignor to
E. H. Kneffer, Oakland, Calif.
Application 0mm 29, 1937, Serial No. 171,019
8 Claims. (of. 200-43)
My invention relates to rotary switches, and switch shaft itself is rotated by action of the
more particularly to that type of friction driven
e'éiscimzcd and claimed in the Clarence 13.
Howard Patent No. 2,103,287, patented December
5 28, 1.933’, for a "Double circuit rotary switch”,
Among the objects of my invention are: to pro
vide- a rotary switch which is easily and quickly
assembled; to provide a rotary switch which is
_
virtually weatherproof; to provide a rotary switch
1“ having the minimum number of parts; to provide
a rotary switch that can be manufactured and
assembled cheaply; to provide a rotary switch
which may be assembled and permanently locked
,
in assembled position; and to provide a rotary
M switch that is sufficiently rugged and weather
proof to withstand use on a portion of a vehicle
subjected to mud and water.
Other objects of my invention will be apparent
or will be speci?cally pointed out in the descrip
m tion forming a part of this speci?cation, but I do
not limit myself to the embodiment of the inven
tion herein described, as various forms may be
adopted within the scope of the claims.
~
‘
In the Howard application cited above, the in
25, ventor has described and claimed a rotary switch
for use in conjunction with a vehicle signalling
system, and in order that the rotary switch be
operated in synchronism with the steering gear of
an automobile, ?ttings are provided whereby the
so switch may be fastened to the quadrant nut, as
described and claimed by the same Howard in an
other application entitled “Vehicle signaling sys
tem”, rial No. 135,921, filed April 9, 1937.
When fastened to the quadrant nut of the Va“
35 hicle steering gear the switch is usually immedi
ately back of the left front wheel, and in that posi
tion is subjected to a continuous throw of mud
and water as the wheel rotates in wet weather.
Furthermore, it is in a position beneath the front
49 fender, which is seldom cleaned, and when such
cleaning does take place, it is usually subjected
to a stream of water from a high pressure hose.
It is therefore extremely important that the cas
tug of the switch be virtually water and mud
i“; tight, and remain so during the useful life of the
switch.
'
,
Furthermore, it is only the rotating actuating
shaft of the switch which is attached to the
quadrant nut, and it is necessary, to obtain chi
so cient operation of the device, to stabilize the case
i :5‘. ii have therefore provided aswitch assembly
.JZBIQS the switch completely ' weather~
and which, at the same time, provides a.
by which the case may be stabilized and
,i'ireveuted from rotating during the time the
steering gear.
Accordingly, I have seen fit to describe my in
vention as applied to one preferred form of switch
assembly, shown in the drawings, wherein
5
Fig. 1 is a side view of the completed switch.
Fig. 2 is an end view of the switch casing on
the side away-from the steering gear connection.
Fig. 3 is a top view of the switch casing, com
bined with a sectional view of the quadrant nut 10
adapter.
Fig. 4 is a sectional view of the quadrant nut
adapter, as indicated by the line 4-4 in Fig. 3.
Fig. 5 is a cross sectional‘ view of the completed
switch after the casing has been applied.
15
Fig. 6 is a cross sectional view taken at right
angles to the view of Fig. 5, looking down from
above.
»
Fig. 7 is a view partly in elevation and partly
in section, taken as indicated by the line 1-1 in '20
Fig. 6, and in the plane of elements 4|.
,
Fig. 8 is a view partly in section, taken as indi
cated by the line 8—-8 in Fig. 5.
Fig. 9 is a view taken from the same location as
Fig. 8, showing the alternate position of the fric- 25
tion driven disc.
.
Fig. 10 is a view looking down upon the switch
assembly, as applied to a vehicle.
For the detailed description of the preferred
form illustrated, I will refer ?rst to Figs. 5 and 6. 30
A switch shaft l is provided with ayknurled por
tion 2 on which is moulded a slip ring disc 4 of in
sulating material. As an insert moulded therein is
a peripheral ring 5, extended along one face of
disc 4 to form a flat brush surface 6. Thus the 35
shaft I, the slip ring disc 4, the peripheral ring
5 and the brush 6 become an integral unit for
assembly purposes.
Beyond the knurled portion 2 is a contact disc
bearing surface "I, a slightly smaller washer bear- 40
ing surface 9, and an end bearing surface i0.
Shaft‘ l terminates in a half round boss H, the
purpose of which will be described later.
Utilizing the unitary shaft and disc as a basis,
the switch may be assembled by vslipping over 45
the large end of shaft i a disc shaped inner cas
ing wall l2 of insulating material having a cen-4
tral metallic bearing l4. On the opposite side
of disc 4, and bearing against shaft surface 1,
is positioned a contact rotor l5. This rotor is 50
free to rotate upon bearing surface 1 of shaft I,
and is provided with two opposite circular brush
bearing surfaces 16 and I1, preferably on the pe
riphery of the rotor.
_
The rotor I5 is also preferably moulded from 55
2
2,1as,esa
insulating material, and has inserted therein a
developed by disc 4 against brushes 2| and 22
pair of metallic inserts comprising peripheral
contacts I9 and 20 prolonged to form double
brushes 2| and 22 extending from the face of
the rotor adjacent the disc 4, the ends of the
will rotate rotor I! in the same direction as disc
4, until lug 24, for example, as shown in Fig.
8, contacts brush 32. The rotor will then stop
rotating, although disc 4 will keep on rotating.
Inasmuch as brush segments |9 and 20 are in
brushes 2| and 22 contacting brush surface 6 on
disc 4. The rotor I5 is also provided immediate
the center of brush surfaces I6 and I1 respec
ly adjacent each brush surface l6 and H with
tively, when the rotor is in the position just
stop ears 24 and 25.
10
Brushes 2| and 22 are bent outwardly and are
made of resilient material, so that when a washer
28 is assembled to rotate freely on the washer
surface 9 of shaft |, pressure will be exerted be
tween rotor |5 and disc 4 by virtue of the resil
15 iency of the brushes. After washer 28 has been
placed on the shaft, front casing wall 26 is as
sembled on small end H! of shaft I, this front
above described brush contact 34 will not make
electrical connection to brush segment I9, where ~10
as on the other side of the rotor, brush segment
20 will be brought into electrical contact with
brush contact 34. Electrical connection will be
established through brush 22 to brush surface 6
on the disc 4, and thence to common brush 32 15
through the peripheral ring 4.
comprises a U-shaped body ?tting the pin at each
end, the base of the U-shaped body being bumped
When the direction of rotation of the steer
ing gear is reversed, as shown in Fig. 9, the op
posite condition will obtain. The circuit that
was formerly closed will open, and the opposite 20
circuit will close. Thus, an electrical circuit is
established through the switch upon each re
versal of rotation of the main shaft I, or when
applied to a vehicle steering gear 46.
In some instances, however, it is advisable to 25
prevent any circuit through the switch when the
vehicle steering gear is in straight-ahead po
up into brush contacts 34.
sition, and for that reason an insulating seg
casing wall 26 being identical in all respects to
rear casing wall l2, i. e., is of insulating mate
rial and with a central bearing 21.
Three brush pins are provided extending be
tween the end walls 26 and accurately posi
tioning them, namely, lateral brush pins 28 and
30 and common brush pin 3|. U-shaped brushes
32 are positioned on each pin, and each one
All three brushes are
prevented from rotating on the pins by lugs 35
ment 50 is provided in the slip ring 4, so that
at each end of the base of the U thereof enter
when the brush contact attached to the com 80
mon pin 3| bears on this insulating segment, no
current can be established through the switch.
In attaching the switch to the steering gear, it
ing recesses in each end wall.
The brushes mounted on lateral pins 29 and
30 are so positioned that the brush contacts 34
press against the peripheral brush surfaces l6
and H on the rotor, whereas the brush mounted
on common pin 3| is reversed and contacts the
peripheral ring 5 on the disc 4. Each of the
brushes terminates on one side of the case in
connection screws 36 to which circuit wires may
be connected.
The outer casing is made in two halves, an
upper half 3'! and a lower half 39.
Each of
these halves is provided with peripheral grooves
40 ?tting the end walls I2 and 26, and with lat
45 erally extending portions 4|. I prefer to make
the circular portions of these parts very slightly
smaller in diameter than the diameter of the
end walls, so that the two halves may be forced
together under pressure applied to the laterally
extending portions and thereafter locked to
gether as, for example, by riveting one half into
the other on the laterally extending portions,
as indicated by circles 42 thereon. Spot weld
ing is, of course, a full equivalent. The pres
sure applied causes the casing halvesto grip the
end walls and make a weather tight seal there
to. Furthermore, the pressure exerted by brushes
22 causes disc 4 to be forced tightly against bear
ing M in one wall, and washer 28 to be forced
60 tightly against the other end wall, thus sealing
the end bearings.
After the switch has been assembled, an
adapter 45, ?tting the quadrant nut on a steer
ing gear 46 attached to the frame 41 of a vehicle
65 is applied, and is attached to the shaft l and
locked thereto by shaft screw 48. The switch
body, comprising upper and lower halves 31 and
39, together with the end walls l2 and 26, is
prevented from rotating and is supported by
70 case ?ttings 49, preferably extending from frame
41 of the vehicle and entering the apertures 42
developed by riveting.
The operation of the switch is simple. When
the steering gear is turned in one direction, disc
75 4 will rotate in one direction and the friction
is obvious that quadrant nuts may be in various
positions of rotation thereon, and it is therefore
desirable that the brush contact attached to the
common pin 3| be on the insulating segment 50
without necessitating opening the case. This
condition may be readily obtained by loosening
shaft set screw 48 and turning the switch from 40
the outer end by the use of a tool applied to the
half round end ll of shaft | until the circuits
are both broken.
Set screw 46 may then be
tightened up, with the assurance that the switch
is properly adjusted for the condition of the
steering gear.
Another point should be brought out, and that
is that while in many instances the friction fit
of the two halves 31 and 39 of the casing may be
sufficiently strong to prevent rotation of the end
walls within the casing, there may be instances
in relatively heavy duty installations, such as
that on heavy trucks, where the torque within
the switch, due to heavy duty contacts, may be
sufficient to rotate the end walls within the case.
While this possibility is remote, I prefer to pre
vent it, and do so by preventing the end walls
from rotating on the assembled casing by provid
ing a casing groove 5| on the outside of each wall,
and where the two casing halves join I extend
end wall material into grooves 5| at the points
where the two halves join, thereby forming lugs
54 contacting both halves. Thus, when the casing
is locked on, these lugs prevent any rotation of the
casing on the end walls. Furthermore, I do not
depend on pins 29, 30 and 3| with screws 36 to
hold the case together and therefore if screws
36 should become loose the case will hold the
switch together.
I have therefore provided a switch of heavy
duty construction and one which is completely
weatherproof and adapted to be utilized on steer
ing gears in locations exposed to large quantities
of mud and water, and have also provided a
switch that is easy to assemble and which has a
3
/
7 minimum of parts andno delicate adjustments
whatsoever.
-
I claim:
cooperating with both of said covers to prevent
relative rotation oi’ said end ‘walls with respect
to the completed cover.
.
1. A rotary switch assembly comprising a shaft,
make and break means mounted on said shaft
5. A rotary switch comprising a shaft, spaced
circular end walls bearing on said shaft, a pin. 5
and actuated thereby, circular end walls bearing
rality of spacing pins extending between said
on said ‘shaft, means for ?xing the minimum dis
‘end walls and having shoulders thereon bearing
tance only between said end walls, resilient means - against said end walls and determining the mini
urging said end walls apart, a pair of semi-cylin
mum distance only between said end walls, a pair
10 drical covers having lateral extensions thereon,
of make and break means mounted on said shaft
peripheral recesses in said covers and ?tting the
peripheries of said end walls, said recesses deter
mining the ?nal desired spacing of said end walls,
between ‘said end walls, resilient means between
said, make and break means and urging said make
and break means apart against said side walls
and means for locking said covers together around v thus tending to increase said minimum distance,
15 said end walls to form a complete case.
a cover engaging the periphery of both of said
2. A rotary switch assembly comprising a shaft,
make and break means mounted on said shaft
end walls and closing the space between, said
cover having spacing means thereon. cooperating
and actuated thereby, circular end walls bear
ing on said shaft, means for "?xing the minimum
distance only between said‘ end walls, resilient
means urging‘ said end walls apart, a pair of
semi-cylindrical covers having‘lateral extensions
thereon, peripheral recesses in said covers and
?tting the peripheries of said end walls, said re
25 cesses determining the desired spacing of said end
with said end walls to maintain said end walls at
said minimum distance irrespective of the urge
walls, and means for locking adjacent extensions
together after said covers are applied around sai
against said end walls and determining the‘mini
mum distance, only between said end walls, a
end walls to form a complete case.
pair of make and break means mounted on said
‘
of said resilient means, and means for interlock
ing said coverv'and said end walls.
' i
6. A rotary switch comprising a shaft, spaced
circular end walls bearing on said shaft, a plu
rality of spacing pins extending between said
end walls and having shoulders thereon bearing
shaft between said end walls, resilient means be
30 make and break means mounted on said shaft tween ‘s'aid make and break means and urging
and actuated thereby, circular end walls bearing said make and break means apart against said
3. Alrotary switch assembly comprising a shaft,
side walls thus tending to increase said minimum '
distance only between a said end walls, resilient distance, a pair of semi-cylindrical covers hav
means urging said end walls apart, a pair oi.’ semi— ing lateral extensions thereon, peripheral grooves
cylindrical covers having lateral extensions there ’ in said covers ?tting the peripheries of said end 35
on said shaft, means ‘for ?xing the minimum
on, peripheral recesses in said covers and ?tting
the, peripheries of said end walls, said recesses
determining the desired spacing of said end walls,
means for locking adjacent extensions together
40 after said covers are applied around said end walls
to form a complete case, and means interlock
in'g said covers andsaid end walls to prevent
relative rotation.
'
-
4. A rotary. switch assembly comprising a ‘shaft,
' make and break means mounted on said shaft ,
and actuated thereby, circular end walls bearing
on said shaft, means for ?xing the minimum dis
tance only between said end walls, resilient
means urging said end walls apart, a pair of
semi-cylindrical covers having lateral extensions
thereon, peripheral recesses in said covers and
?tting the peripheries of said end walls, said
recesses determining the desired spacing oi’ said
end walls, means .for locking said covers together
55 around said end walls to *form a complete case,
ands-houldermeansoneachotsaidendwalls,
walls, said grooves determining the spacing of
said end walls substantially at said minimum dis
tance, and means for interlocking said covers
together thereby ?nally spacing said end walls
against the urge of said resilient means.
40
7, Apparatus in accordance with claim 6,
wherein stationary contact brushes are mounted
on a plurality of said spacing pins in a position
to cooperate with each of said make and break
means.
8. Apparatus in accordance with claim 6,
wherein stationary contact‘brushes are mounted
on a plurality of said spacing pins in a position
to cooperate ‘with each of said make and break
means, each oi’ said brushes having a portion 50
clamped between a shoulder on the spacing pin
carrying said brush and having another portion
entering a recess in the end wall adjacent the
clamped portion to prevent said brush from,
turning,
WAGN 'IRAUTNER.
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