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Патент USA US2132302

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Oct. 4, 1938.
Filed April 3, 1956 ‘
2 Sheets-Sheet 1
Oct. 4, 1938.~
Filed April 3, 1956
17 26
2 Sheets-Sheet 2
Patented Oct. 4, 1938
Jeremiah D. Kennelly, Oak Park, Ill. ‘
Application April 3. me, serial No. 72,652
1Claim. (Cl. 240-48)
This invention relates particularly to lamp casing-like frame A; and D’, motor-driven mech
structures adapted for use on motor vehicles or
the like. The invention is well adapted, for ex
ample, for use on police motor vehicles, fire,
trucks, or in other situations where warning sig
nals are desirable.
In some respects, the invention constitutes an
improvement upon the invention disclosed and
claimed in my U. S. Patent 1,991,101, granted
10 February 12, 1935.
‘ The primary object is to provide a simple lamp
structure of the character suggested which will
operate in a highly effective manner to cast a
warning beam in front,,for example, of a fire
15 truck, or other motor-driven vehicle.
An important feature of the invention is the
anism serving to oscillate the shaft B’ and also
to oscillate the lamp-mounting C.
One terminal of the lamp and one terminal of
the motor are grounded, preferably.
The lamp casing Bis provided at its lower por
tion with an opening, as indicated at i, into
which projects a ?ange with which the upper
portion of a disk-like cap plate 2 is provided.
The shaft B’ extends through the cap-plate and 10
is secured thereon by nuts 3. Preferably a ball
bearing 4 supports the shaft B’ and the lamp
carried thereby.
The lower end of the shaft B’ is equipped with
an arm 5 with which is pivotally connected a
link 8 provided with 9, depending pivot-mem
provision of a, simple and desirable device for ber 6“.
maintaining a circuit to the electric bulb of a
The mounting C of the lamp-bulb extends
lamp which is being oscillated about a vertical freely through an opening 1 in the rear portion
20 axis; a further feature of improvement is the ., of the re?ector 1“ which is ?xedly mounted in
provision of a mounting for the lamp bulb which the lamp-casing; and the mounting is connected
is adapted to oscillate about a horizontal axis, the by a transverse pivot 8 with the hollow neck por
re?ector in which the bulb is located being, in tion 'lb of the re?ector. The mounting C is
this instance, stationary; and a further feature shown equipped with a clamping ring 9 which is
25 of the invention is an improved device which connected by a link 10 with a vertical plunger
provides for variation of the course of the beam II which works freely through the shaft B’.
of light without the necessity of physically tilt
\ The outer terminal of the lamp-bulb is ground
' ing the bulb or the re?ector in which the bulb ed through the mounting C and its connections.
is mounted to raise and lower the beam of light. The central terminal of the plug-portion l2 of
A more complete description of the features of the lamp bulb makes the usual contact with the
improvement will appear in the description which adapter C and is electrically connected, in a 30
known manner, with a conductor wire i3 which
The invention is illustrated in the accompany
extends downwardly through the shaft B’ to a
ing drawings, in which—
Fig. 1 is a broken vertical sectional view illus
trating a lamp device constructed in accordance
with my invention; Fig. 2, a broken horizontal sec
tional view taken as indicated at line 2 of Fig. 1,
illustrating the manner in which a circuit is
maintained duringoscillation-oi' the lamp-cas-_
ing; Fig. -3, a broken horizontal section taken as
indicated at line 3 of Fig. 1: Fig. 4, a broken
horizontal section taken as indicated at line 4
contact-carrier H which is insulatingly support
ed by the lower end of the shaft B’. 'As illus
trated in Fig. 2, the member 14 is attached to an
enlargement at the lower end of the shaft B’,
as by means of screws l5, suitably insulated. An
insulation disk 16 is interposed between the mem
ber l4 and the lower end of the shaft.
The member It carries a spring-projected con
tact-member ill which is yieldingly held against
a curved, segmental contact-member I‘! which is
insulatingly connected with the frame A at points
Referring to Figs. 1-4, A designates a frame,
As will be understood from Figs. 1 and 2, the
shown as in the form of a casing, which is adapt
ed to be mounted, for example, upon suitablev conductor 13 preferably extends through an open
supporting forks at the front end of a motor ve-. ing in the disk I4 and has a bared end which
is electrically connected with the disk H .by 50
hicle; B, a lamp-casing equipped with a de
pending shaft B' journaled to oscillate in the means of one of the screws i 5. Thus, current
front portion of the frame A; C, a lamp-bulb may be passed continuously upward to the lamp
mounting carrying a lamp-bulb C’ adapted to bulb, notwithstanding the oscillation of the
be oscillated in the rear portion of the re?ector; lamp in a horizontal plane.
55 D, a motor mounted in the rear portion of the
The lower end of the plunger ll 1.. engaged l5
of Fig. 1; and Fig. 5, a vertical sectional view,
45 partly in elevation, illustrating a modi?cation.
by a bell crank lever l8 adapted to be actuated
by a link IS.
The motor D has a shaft equipped with a worm
20 which serves to actuate a worm-wheel 2|
journaled on a vertical axis and a worm-wheel
22 journaled on a horizontal axis. The pivot
member 6*i of the link 6 is eccentrically connected
‘with the worm-wheel 2|. That is, the member
6“ serves as a crank for actuating the arm I and
effecting oscillation of the shaft B’.
The link | 9 is connected by an eccentric pin
I9a with the worm-wheel 22, and thus the bell
crank lever |8 will be oscillated by the rotation
of the wheel 22.
Current is supplied to the motor and lamp‘
through a conductor 23 which has a branch 23.
leading to the motor and a branch 23*’ which is'
electrically connected with the ‘segmental contact
|‘| through the medium of one of the bolts 24
20 which serve to connect the segment insulatingly
to the frame A.
The base frame, which constitutes a housing
for the motor and the driving mechanism actu
ated by the motor, is shown provided with per
25 forate lugs 25 by means of which the frame may
be securely mounted upon forks or brackets at
the front end of the motor vehicle.
Current may be supplied from any suitable
In connection with Fig. 1, 26 indicates
_ Source.
80 a battery'having one terminal grounded at 21.
Current from the battery may be passed through
a switch 28 to the conductor 23. From the de
scription given, it will be understood that as the
motor operates, the worm 20 actuates the worm
wheels 2| and 22 continuously, thus causing the
lamp casing to oscillate about a vertical axis and
causing the lamp bulb to oscillate about a hori
zontal axis.
The e?ect is to cause the beam of
light thrown by the lamp to cross itself. Any
desired timing of the oscillations about the ver
tical axis with respect to the oscillations about
a horizontal axis may be employed. It is pos
sible, by selecting a suitable gear ratio, to pro
duce a ?gure 8 con?guration of the beam-path,
45 as more fully explained in the above-mentioned
In the modi?cation shown in Fig. 5, the gen
eral construction is the same as already de
scribed, and corresponding parts are designated
corresponding reference characters. In this
50 case, the oscillating lamp-bulb mounting is dis
pensed with. Instead, an adapter C2 is longi
tudinally adjustable, for focusing purposes, in
a sleeve 29 with which the rear portion of the
55 ?xedly
mounted re?ector is provided.
adapter, or mounting, carries a lamp-bulb C3
which is provided with ?laments 30 and 3|,
spaced one above the other.
The construction shown in Fig. 5 provides for
alternate energizing of the ?laments 30 and 3|,
thus alternately raising and lowering the light
emitting source. The outer terminal of the plug
portion of the lamp, designated 32, is grounded
through the reflector and lamp casing. The
central or intermediate terminals of the ?la
ments 30 and 3| are designated 30“ and 3|‘ re
They contact with‘ members‘ 33 and
34 which are electrically connected with con
ductors 33* and 34“ which lead downwardly 10
through the shaft ‘.8’ which carries the lamp
casing. The shaft B is' oscillated through} the
medium of the worm-wheel 2| in the manner
described in connection with Figs. 1-4. A worm
wheel 22“ replaces the worm-wheel 22 of the 16
other construction and serves to actuate a cam
segment 35 which is adapted to alternately ‘close
switches 36 andjl-which are mounted inthe
casing-like frame A. The switch 36 controls the
energizing of the conductor 33“; and the switch 20
31 controls the energizing of the conductor 34“.
As stated, the ?laments 30 and 3| are'alter
nately energized and heated to incandescence.
Owing to the fact that the ?laments are located
in different horizontal planes, or at di?erent 26
levels, the effect is to cause an up-and-down
movement of the beam as the ?laments are
alternately energized. Also, an interruption of
the light occurs, the length of interruption de
pending upon the length of the arc of the seg
ment 35 which closes the switches in alterna
tion. Preferably, the interruption is long
enough to enable the interruption to be readily
detected by the eye, so that distinct ?ashes are
The foregoing detailed description has been
given for clearness of understanding only, and
no unnecessary limitations should be understood
What I claim as new and desire to secure 40
by Letters Patent is:
In a signal lamp device of the character set
forth, a motor casing, a motor therein, a lamp
casing supported by said motor casing, a reflector
?xedly supported in said lamp casing, said re 45
?ector being centrally apertured at its rear side,
a lamp bulb mounting extending, through and
pivotally supported on a horizontal axis within
said aperture for vertical oscillatory movement
therein, said mounting having a rearwardly ex 50
tending shank portion of substantially uniform
diameter, a light bulb in said mounting, a clamp
ing ring mounted on said shank and adjustable
therealong toward and away from the pivot of
said mounting whereby to vary the throw of said
light bulb, and actuating means, driven by said
motor and connected to said clamping ring.
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