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Патент USA US2106605

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Jan. 25, 1938.
Filed Nov. 8, 1934
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Heder/'cu' Jg/Ie/son ab
"2m „W7 "4
-‘Patented Jan. 25, 1938
, nrs'roanANcs aasroNsrvE swn'ca
Frederick B. Johnson and Irvin Jacobson, Kanaal
v „Application Nomura s. 19:4, semina. 15am
7 claims.
This invention relates to ja disturbance respon
sive switch adapted to be actuated incidental to
movement of an object carrying the switch, for
example, a motor vehicle, and has for its princi
pal object to provide a device of this character
that is sensitive to the slightest movement of the
vehicle in any direction, but which -is ln no way
ail’ected by an angular condition oi' the vehicle
aslong as it is in a state of rest.
In accomplishing these and other objects oi'
the invention, as hereinafter set forth, we have
provided improved details of structure, the pre
ferred form of which is illustrated in the accom
panying drawing, wherein:
Fig. 1 is a perspective view of a portion of a
motor vehicle equipped with a theft alarm in`
cludlng a disturbance responsive switch embody
ing the features of the present invention.
Fig. 2 is an elevational view of the alarm partly~
in section to better illustrate the construction and
support of the contact elements of the switch.
Fig. 3 is an enlarged horizontal section on the
line 3_3, Fig. 2.
Fig. 4 is a vertical section through the disturb
25 ance responsive switch contact assembly.
Fig. 51s a' detail perspective view of the circuit
interrupting switch and lever for rendering the
disturbance responsive switch ineil'ective.
(ci. zoe-sz) -
bolt or the like I6 extending through the ?anges
and through the depending end of the block. `
JThe lower ends of _the leg portions 3 and I ot
the frame are connected in spaced relation by a
cross bar-I1 that is attached to a base plate i3 5
preferably formed of insulating material to mount'
an alarm element later described.
Formed on the frame substantially midway of
the height oi the legs 3 and 4 and projecting in
.wardiy thereof are aligning bosses I! and 20 hav- 1'0
ing threaded sockets 2| and 22 for adjustably
mounting screws D25. 'I‘he inner end of the boss
i9 and the trunnion screw 25 in the boss 2li carry
trunnion points 21 and 2l for pivotally mounting
a gimbal ring 29 which in turn pivotally mounts 15
a pendulum housing 3l.
The pendulum housing 30 includes upper and
lower sections 3| and 32 connected by an inter
mediate coupling ring section 33. '111e upper sec
tion is of smaller diameter than the inner diam 20
eter of the gimbal ring to provide free swinging
movement of the housing within the ?ing`in a
direction transversely to the axis ci the trunnion
points previously described, so that the housing is
universally suspended within the frame to retain
a perpendicular position regardless of the angu
larity of the frame or support on which the frame
is mounted.
'I'he upper end of the section 3| has diametri
Fig. 6 is an enlarged elevational view of the .
z30 switch mechanism for controlling the time period . cally opposed trunnion openings 34 and 35 for 30
within which the signal is active after being actu
ated by the disturbance responsive switch.
Fig. '7 is a diagrammatic view of alarm circuit
accommodating the trunnion points 36 and 31 on
_screws 3l and 39 that are adjustably threaded
through the gimbal ring at right angles to the
in whichv the disturbance responsive switch is ç axis of the trunnion points 21 and 28.
35 connected.
Referring more in detail to the drawing:
i designates a disturbance responsive switch
and associatedïmechanism including a frame 2
having verticall leg portions 3 and- 4 connected at
40 their upper ends‘by a cross bar 5 provided with
`vertical side flanges i and 1 to suspend the frame
from a clamping device 8.
The clamping device illustrated includes a block
9 having a transverse V-shaped groove il in one
45 face thereof cooperating with a clamping plate I l
to engage a part of the object on which the switch
is to be mounted as, for example, a.l brace rod I2
connecting the radiator (not shown) with the
dash I3 of a motor vehicle designated Il. The
plate Il is secured in clamping engagement with
the rod by fastening devices such as screws l5
The upper
end ot the section 3| is closed by a disk 40 prefer 85
ably iormed oi.' insulating material to mount a
contact element Il later described.
'I'he opposite end of the housing section 3| is `
internally threaded to engage the upper thread
ed end 42 of the coupling ring 3_3 and is nor 40
mally prevented from relative rotation therewith.v
by a lock ring I3 that is also threaded on the
coupling member and is moved in abutting en
gagement with the lower end of the upper hous
ing section. 'I'he lower end of the coupling mem 45
ber is provided with an annular collar 44 form
the block as best illustrated in Fig. 1. The lower
end Vot the block 9 engages between the ilanges 5
ing an end abutment for the upper end of the
lower housing section which is threaded thereon
as illustrated in Fig. 2 to complete the housing
for the fixed and pendulum contact elements 4|
and I5 to close the signa‘l circuit as now to be
'I'he ilxed contact element 4I includes a bush
ing I3 that is mounted in an opening I1 oi' the
and 6 oi the frame 2 and is secured thereto by a
insulating disk Il _and is provided with an inter 55
extending through the plate and threaded into
nally threaded bore 48 to adustably mount the
16 that is connected with the alarm element such
threaded shank 48 of a contact head 58.
as a bell 11 and a lamp 18 by a 'conductor 18
and a fixed contact 88 that is connected to a con
tact 8| of a secondary switch 82 through a con
contact head 50 is preferably of disk shape hav
ing a ñat contact plate 5| to cooperate with a
similar plate 52 of the pendulum contact ele
ment 45. 'I'he pendulum contact element in
cludes a cylindrical body 53 carrying the contact
52 and is provided with a transverse bore 54 for
projection therethrough of a transverse fulcrum
10 bar 55 that has its ends mounted in slots 56 and
51 provided in the coupling ring 33 as best illus
trated in Fig. 4, the ends of the bar being re
tained in seated condition in the slots by fasten
ing devices 58 extending through the ends of the
15 bar and threadedly engaged in sockets in the
bottom of the slots.
Threadedly mounted in the body portion of the
ductor 83.`
The relay switch also includes a solenoid 84
provided with a winding 85 having one terminal
connected to the movable contact 88 of the sec
ondary switch 82 and having its other terminal
connected to a source of current supply such as 10
a battery 81 by means of a conductor 88.
It is thus apparent that when the device is
vibrated to cause either the pendulum weight
63 or the housing to swing, the peripheral edges
of the contacts 5| and 52 will engage each other
to close circuit through the battery 81, conduc
tor 88, solenoid winding 85, secondary switch 82,
pendulum and projecting into the transverse bore contacts 5| and 52 and conductor 18 to the ground
is a fulcrum screw 58 having _a cone-shaped and back to the battery.
20 point 80 on its lower end engaging a socket 8|
'I’his ñow of current energizes the solenoid 84 20
in the top of the bar. Formed on the lower end and effects actuation of the arm 13 to close the
of the body portion of the pendulum is a threaded - contacts 14-88 and 15-18 causing the current
stud 82 for supporting a weight 63.
to flow through the secondary -switch 82 and to
It is'thus apparent that the pendulum is ful
the signal circuit to energize the bell 11 and
25 crumed on the bar to normally retain the con
light the lamp signal 18, thereby giving warning
tact plate 5| thereof in parallel spaced relation that the vehicle has been moved from its state of
with the contact plate 5| on the fixed element rest.
to normally break the circuit therebetween, but
With the circuit thus far described, it is ap
the pendulum is free to swing in all directions parent that as long as current is flowing through
30 incidental to its point support on the bar 55 to the solenoid, the relay contacts will remain closed 30
cause the peripheral edge of the contact face 52 to continue operation of the signals.
to engage the Contact plate 5| of the ñxed ele
It is, therefore desirable to provide means for
ment. If the~ housing is moved from perpendic
ular position in any direction, the pendulum re
35 mains stationary and the fixed contact 5| en
gages with the peripheral edge of the pendulum
contact 52 to close a circuit therethrough.
In order to retain the fulcrum screw in engage
ment with its socket and limit upward movement
40 of the pendulum under vibration, the stud 82 is
provided with an internally threaded b'ore to ac
automatically breaking the circuit to the relay
after the signal has been energized and to ac
complish this, we provide for thermostatic opera- Y
tion of the secondary switch 82.
The movable contact _88 for -the secondary
switch is mounted on a spring leaf 88 to be nor
mally retained thereby in contact with its com
plementary contact 8|. 98 designates a thermo 40
stat element preferably formed of metal and hav
commodate a screw 84 having a cone shaped
ing one end thereof ñxed to a bracket 3| and its
upper end 65 slightly spaced from the bottom and
opposite end normally engaging a lug 82 on the
a cone shaped recess 85 formed in the lower side
contact spring 89. Coiled about the thermostat
45 of the transverse bar 55, the spacing between the is a heating element 83 having one lead connected
screw and socket being suii‘icient to allow the to the conductor leading to the secondary con
maximum swinging movement of the penduium. tact switch 88 and the other to the conductor 88.
To lock the ñxed contact element 4| in ad- . Upon flow of currentthrough the solenoid, a por
justed position relatively to the contact plate 52 tion of the current will be shunted through the
50 of the pendulum 45, the bushing 45 is provided resistance 83 to heat the thermostat element 88
with a set screw 61 engaging the threaded shank which is set so that after the temperature has
48 of the contact element.
reached a given point the thermostat element
In order to provide a sufiicient weight in the will flex to raise the spring contact 88 of the
housing to retain the housing in perpendicular secondary switch, thereby breaking circuit to
position, the lower section is provided with an the solenoid which in turn interrupts the current
annular collar 69 of considerable weight and supply to the bell 11 and lamp 18 through the
which is preferably knurled to permit adjust
contacts 16 and 88.
ment of the coupling section relatively to the
When current has broken through the solenoid
84, the current is also broken through the heat
ing element by the secondary switch 82 and' this
switch will not close until the resistance element
88 has cooled sufficiently to allow closure there
housing, thereby varying the relative spacing be
60 tween the contact faces.
The lower contact plate is directly grounded on
the frame through a flexible connection 18 iixed
to the contact 45 and to the coupling ring 33 of
the housing as best shown in Fig. 4. The ñxed
65 contact element is connected by a conductor 1|
leading to a relay switch designated 12 carried
by the frame 2 and adapted to close a circuit
leading to a source of current supply to retain
the signal in operation after the circuit has been
70 broken through separation of the contact plates
5| and 52.
The circuit will not again be energized un- ’
less the vehicle is again moved to cause swinging
of the pendulum to energize the circuit as pre 65
viously described. In order to set the timing be
tween the make and break of the secondary switch
by means of the thermostatic element, the ther
mostaticelement is mounted on a pivoted lever v84
that is pivoted on the bracket 8| and is engaged
by set screws 95 and 86 that are threaded through
The relay switch 12 includes a pivoted arm 13 Y the ñxed bracket 8| and which have their ends
carried by the frame 2 in alignment with the core engaging against stop shoulders on the lever 84
of the solenoid and having interconnected con
at opposite sides of the lever pivot.
It is thus apparent that by tightening one
screw and slackening oi! the other, the ther
mostatic element may be tensioned so that it will
be caused tobreak the circuit through the sec
ondary switch at selective time periods.
In order to prevent energization of the circuit
when the vehicle is in use by an authorized per
son', a manually operated switch Il is connected
in the conductor II. ‘This switch 81 includes a
contact clip AIl that is iixed to a plate 9! carried
on the insulating plate Il adjacent the lower end
of the' contact housing. Pivoted to the lower end
of the leg l of the frame 2 is a lever i“ operating
through a slot IUI in the leg l and extending un
der the weight 62 so that its opposite end Il! is
operable through an opening |03 in the lower end
of the leg 3. ‘The projecting end'of the lever is
connected by a ilexible cable IM to an operating
button on the dash of the vehicle. Directly un
der the pendulum weight I4 is an inverted cone
shaped- plate |05 havinga tongue I“ thereon
pivotally mounted in a slot |01 in the collar of
the lower housing section so that the center there
' of is supported in contact with alug I“ provided
on the'upper face of the lever`lll. Formed on
the lever I“ on the side adjacent the clip Il is a
laterally extending arm |09 having a contact IIU
to engage the clip.
It is'thus obvious that when the iiexible con
nection l“ is moved to raise the lever arm Ill,
80 the contact J III will be moved fromA engagement
with the clip ll and the lug |08 thereon will be
moved against the pivoted disk to engage against
the pendulum weight Bl and prevent swinging
thereof that might cause damage to its fulcrum
including the fulcrum screw i9.
It is also desirable to provide the conductor wire
with a second switch III, preferably of the
permutation type, that is mounted exteriorly of
the vehicle as shown in Fig. l and which is con
40 nected in circuit with the conductor by wires il!
and H3 so that the circuit ’may be closed after
the operator has closed the switch 91 and locked
the 'doors of the vehicle.
'mebenn «mamma'umiwbeioeated«many>
convenient part of the vehicle. We prefer, how
As long as the car is stationary, the contacts
Il and 52 will remain open regardless of the
position of the car, due to the universal mount
ing of the housing. The pendulum will. there
fore, hang in a perpendicular position to main
tain spacing between the contacts 5l and 52.
However, should an unauthorized person move
some portion of the car to cause swinging of
the housing of?he pendulum the contacts will
engage to close the circuit through the relay 10
switch 12, secondary switch 82, and ce” luctor
10 to the ground, energizing the relay switch
to close the circuit to the bell 'I1 and lamp 18.
Current will also flow through the heating ele
ment to heat the thermostat. The bell will con
tinue to ring until the thermostat has been heated
sufficiently to cause separation of the contact
86 of the secondary switch. When this occurs,
the circuit through the relay switch is inter
rupted which eñects breaking of the circuit to 20
the bell 11 and lamp 1l. The signal will not
again be energized unless another attempt is
made to enter the car. Upon cooling of the
thermostat, theV circuit will be reestablished
through the secondary switch and should the
car .be moved a second time, the contacts Il and
l2 will again close the circuit to.l again edect
opération of the signals.
While the switch device maybe mounted on
any- part of the car, it is readily energized through 30
any vibratory movement applied to any part of
the car, such as the tires, spare wheel, or other
accessories. The signal alarm will, therefore,
not only protect the car against theft, but will
also protect the car against loss of the accessories,
since an attempt to remove the accessories will
cause movement of the car to energize the signal.
If desired, the 'gimbal ring may be dispensed
with Vand the housing 30 can be universally sus-‘
pended by means of a_ pivot pin and bar similar
to the suspension means for the pendulum as
above described.
What we claim and desire to secure by Letters
Patent is:
' l. In a device of the character described, a
ever, to mount the bell directly on the lower face housing, a pair of facing disk-like contacts hav
of the insulated plate .Il and the lamp 'Il on the ' ing substantially hat contact faces for controlling
instrument board of the vehicle.
As an added precaution, switches as indicated
50 at I Il may be connected into the circuit to cause
energization of the alarm. One of these switches
is preferably located so as to be operated in case
some one should attempt to raise the hoodwith
out effecting movement ofthe vehicle.
While we have specifically referred to the audi
ble signalling device or alarm as a bell, it is ob~
vious that a horn, buzzer, or othersimilar device
‘ may be substituted, or the. hornwhich is the
standard equipment of the vehicle may be con
nected into the circuit in lieu of the independent
sounding device.
In> operating a mechanism constructed and
mounted on a motor vehicle as described, and
assuming that the vehicle is being operated by an
authorized person, the pendulum weight I3 is en
gaged by the lug `I u on the lever to hold the point
lof the screw M in engagement with the socket
Il to prevent swinging of the pendulum.
the driver wishes to park the car, he will
‘operate the cable I“ to close the switch Il and
¿release „the pendulum from contact with the lug
an electrical circuit, a pivotally mounted support
in the housing for carrying one of the contacts
withl the contact face normally arranged in a
horizontal plane, means for pivotally supporting
the other contact on said pivotally mounted sup
port with its contact face in a horizontal plane
innnormally spaced relation and in axial registry
with the first named contact, and means for eu
gaging one of the contact supports to selectively
prevent movement of said supports, said contacts
being movable in peripheral contacting `relation
with each other responsive to'vibratory movement
of said supports.
2. In a device of the rcharacter described, aV
pendulum, a disk-like contact carried by the
pendulum having a normally horizontal contact
face, means supporting the pendulum _foi- oscil
latory movement, means for swingingly suspend
ing said supporting means,-a similar contact
having a contact .face normally retained in a
horizontal plane on said last named suspending
means in vertically spaced facing relation with
the first’ named lcontact and adapted to be en
gaged by the first named contact upon swinging
III. After leaving the car and'locking the doors ' movement ofV the pendulum,~ and means for se
thereof, the permutation lock will be operated to
close the permutation switch from the exterior
75 of the car, completing the setting of the alarm.
lectively engaging the pendulum to prevent oscil
latory movement thereof.
3’. In a device of the. character- described, a 75
support, a gimbal ring pivotally mounted on the
support, a pendulum housing swingingly mount
ed on said gimbal ring, a pendulum, means piv
otally supporting the pendulum in the housing,
Ul a dat disk-shaped contact carried on the pen
dulum above the pivotal support, and a similar
crum bar, and a contact carried by the body
of the pendulum in normally spaced alignment
with the ilrst named contact and adapted to
peripherally engage said contact upon relative
movement of the pendulum in the housing.
6. In an apparatus of the character described,
contact carried by 'the housing in vertically
a support, a pendulum housing, means univer
spaced relation with the pendulum contact and
adapted to be engaged by the pendulum contact
sally suspending the pendulum housing on the
10 for closing a circuit incidental to relative move
ment of the housing and pendulum.
4. In an apparatus of the character described,
a'support, a contact carrying member, means
pivotally suspending the contact carrying mem
ber on the support whereby said contact carry
ing member retains perpendicularity during
change of position of said support, a substan
tially disk-like contact carried by said member
and having a downwardly facing normally hori
zontal contact face, a second Contact carrying
member, a contact on said second contact car
rying member oi similar shape and having a
normally horizontal contact face, and means
mounting said second contact carrying member
for oscillatory movement on the ñrst contact
carrying member with said contact faces in
spaced facing relation whereby said last named
contact is caused to peripherally engage the
other contact upon oscillatory movement of the
30 second contact carrying member.
5. In an apparatus of the character described,
a support, a pendulum housing, means univer
sally suspending the pendulum housing on the
support, a contact carried in the axis of the
35 housing and having a substantially iiat hori
zontal contact face, a pendulum including a body
having a -transverse bore, a fulcrum bar sup
ported by the housing and extending through
said bore, a fulcrum member carried by the
pendulum and having point bearing on the ful
support, a contact carried in the axis of the
housing and having a substantially iiat horizontal
contact face, a pendulum including a body hav
ing a transverse bore, a fulcrum bar supported
by the housing and extending through said bore,
a fuicrum member carried by the pendulum and
having point bearing on the fulcrum bar, a con
tact carried by the body of the pendulum in
normally spaced alignment with the ñrst named
contact and adapted to peripherally engage said
contact upon relative movement of the pendulum
in the housing, a stop member carried by the 20
pendulum and engageable with the bar on the
opposite side of said point bearing, and means
for lifting the pendulum from said point bearing '
and the stop member into engagement with the
fulcrum bar to selectively prevent said relative
7. In a device of the character described, a
support, a pendulum housing, means universally
mounting the pendulum housing on the support,
a pendulum, means universally mounting the -'
pendulum in the pendulum housing, contacts car
ried by the pendulum and housing for closing
a signal circuit, a lever pivoted on the support,
a pendulum engaging member pivoted in the
housing, and means on the lever adapted to
engage said member to move the pendulum en
gaging member into contact with the pendulum
to selectively prevent relative movement thereof.
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