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Патент USA US2112331

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March 29, 1938.
2,112,331
E. T. CONDOM
AUTOMOBILE SIGNAL SWITCH
Filed June 5, 1936
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INVENTOR.
EDWARD 7 Con/00M
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ATTORNEY
Patented Mar. 29, 1938
2,112,331
UNITED STATES PATENT OFFICE
2,112,331
AUTOMOBILE SIGNAL SWITCH
Edward T. Condon, New York, N. Y.
Application June 5, 1936, Serial No. 83,622
2 Claims. (Cl. 200-11)
The invention relates to an electrical switching to the steering post of a self-propelled vehicle.
device adapted more especially for use with self
This body portion carries also a plurality of yield
propelled vehicles such as automobiles, as, for ex
able elements as the spring-pressed balls I2, the
ample, where it is desirable to give indication of two outer balls constituting, for example, live con
a driver’s intention to make a turn either to the tact terminals while the intermediate one consti'
right or to the left.
tutes a neutral or grounded terminal.
An object of the invention resides in the pro
A pilot lamp l3 may also be arranged in the
vision of a three-point signal switch mechanism body portion, if desired.
which may be manually operated to the three po
Upon the top‘ of the stationary body portion I0
10 sitions and embodying yieldable contact elements
is mounted for oscillation a suitable cap‘ or mov
of the switch device, together with additional
yieldable holding means to insure against unin
tentional displacement of the coacting parts un
able member I5 bearing upon its under face, which
is juxtaposed to the terminal elements 12, a
der rough usage to which a switch of this type
to slide over a pair of adjacent terminals to
bridge the same, that is to say, a live terminal
with the intermediate grounded terminal when
the movable member is oscillated either to the
right or to the left of its neutral position, similar
may be subjected, particularly in connection with
the operation of heavy trucks and the like.
In carrying out ‘the invention, there is arranged
to be suitably secured to an element of the ve
hicle conveniently located to the operator the
20 novel switching mechanism in. a manner such
that a handle element thereof is located for ma
nipulation by the downwardly directed ?ngers of
an operator. This handle is designed to oscillate
a movable member of the switch device to either
25 side of a neutral position, there being provided on
a stationary associated portion three independent
terminal elements including two end and an in
termediate terminal with yieldable contacts
adapted for location in juxtaposition to the mov
30 able member.
To insure the proper positioning of the mov
able member and maintenance of a selected posi
tion, there is provided in the handle portion
thereof a spring-urged plunger or detent member
35 adapted to engage one of three sockets provided
in the stationary body portion and which sockets
are spaced in accordance with the angular spac
ing of the yieldable terminal elements so that
when the movable member is juxtaposed to any
of said terminal elements, its position will be
further insured againt unintentional displace
ment by the detent member carried by the handle
of such movable member.
The nature of the invention, however, will best
45 be understood when described in connection with
the accompanying drawings, in which:
Fig. 1 is a plan View of the novel switch device
with a portion indicated in horizontal section.
Fig. 2 is a vertical section through the device;
and Fig. 3 is a bottom plan.
Referring to the drawings, I0 designates a sta
tionary or attaching body portion of a switch de
vice which may be mounted upon a suitable
threaded stud H, as indicated, for example, at the
55 end of a switch lever or a bracket for attachment
pair of oppositely disposed shoes l6, l1 adapted
ly to the arrangement set forth in my copending
application, Serial No. 524,990.
20
To effect convenient oscillation of this movable
member, the same is provided with a handle or
like element 18 projecting radially outwardly
therefrom and which may be manipulated by the
?ngers of an operator of a vehicle.
It has been
found, particularly in the case of heavy trucks
and vehicles subjected to considerable jarring and
rough usage, that the spring-urged balls 12 may
not exert su?icient hold upon the movable mem
ber to insure that its position will be maintained 30
under all conditions. In order to obviate any
possible unintentional displacement, the said han
dle member I8 is, axially bored to receive a coil
spring 19 which is located behind a detent mem
ber or plunger 20 urged inwardly toward the sta 35
tionary body portion I8. The latter, moreover, is
provided in its periphery with a plurality of sock
ets 2| designed to receive the protruding end of
the plunger 20; and the respective sockets are
angularly located to conform to the positions of
the aforesaid terminal elements. By this expe
dient, whenever the movable member is properly
positioned for making contact or is located in its
neutral position, the said plunger 20 will also be
located in a corresponding socket, which sockets
may be rounded, as shown, to admit ready entry
and removal in oscillating the movable member
to a selected position.
I claim:
1. A three-point signal switch for use with self
propelled vehicles, comprising stationary attach
ing means affording a bearing portion having a
plurality of peripheral and circularly-disposed
recesses, an annular exposed member movably
mounted over and to rotate on the said bearing
2,112,331
2
portion and carrying a pair of separated contact
shoes, means associated with the movable member
adapted for manual engagement to oscillate said
movable member upon either side of a neutral
Ul
position, three independent terminal elements in
cluding two end and an intermediate terminal
with yieldable contacts for engagement with the
contact shoes in a direction parallel to their axis
of oscillation and carried by the attaching means
in juxtaposition to the movable member such
that the intermediate terminal corresponds to the
neutral position of said movable member, and a
holding member carried by the movable member
for yieldable positive engagement with the said
recesses, in a direction at right angles to the direc
tion of the application of the contact pressures,
when said holding member is in either of its two
operative positions and to maintain thereby a
selected position.
:0
2. A three-point signal switch for use with
self-propelled vehicles, comprising attaching
means affording a bearing portion having a plu
rality of peripheral and circularly-disposed re
cesses, an annular exposed member movably
mounted over and to rotate on the said bearing
portion and carrying a pair of separated contact
shoes, a hollow handle extending radially out
wardly therefrom adapted for manual engage
ment to oscillate said movable member upon
either side of a neutral position, three independ
ent terminal elements including two end and an
intermediate terminal with yieldable contacts for
engagement with the contact shoes in a direction 10
parallel to their axis of oscillation and carried by
the attaching means in juxtaposition to the mov
able member such that the intermediate terminal
corresponds to the neutral position of said mov
able member, and a spring-urged detent housed
within the hollow handle to engage said recesses,
in a direction at right angles to the direction of
the application of the contact pressures, when
said movable member is in either of its two oper
ative positions as well as in its neutral position 20
and to maintain thereby a selected position.
EDWARD T. CONDON.
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