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Патент USA US2407122

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‘_ f
the conductors
Í anos/,122 È
and .5|
Íi „
of_ resilient material ç' i v_thereby closing the burglar alarm circuit through
theymay yield ‘and `avoid damage to thecontacts _'
_ f8, ‘52, 54 and 55
Í
l3
»_ï
Äarmatu're i5,` wire lß,`_sxvitch~2û, »vali-cl2. switch ' '
the event- ‘that the penduluml
ï'24, Contact,
3|. _In
25, the
bell event'that
27'. Wire 29,
theconductor@
base memberand
‘I5 .
‘.should’be swung vioientlyrio eitherl‘side. The Qcontact
’contacts i8; and 52` are» held in "spaced ,-relation*
should be' restored Atoalevel position and allow _
to the contacts vîulùfaricl 55 byset, screws B0 kand
_
'
`
I ¿Ütlie pendulum 4'6 `to move out of engagement with
,_
" '
"the Ícl’Jnt-ac;v `lili, Ythe weakened current` flowi?g‘;
:maintain
¿through the
.theelectr_omagnetì
alarm circuit 8injclosed
will still- condition
suillce- to ` "
‘adjusted l tool-artis or >awayffrom- the'respective» nl owing to v’the close `prcou‘mity of rthe armature
2 intervening
support maycontacts
.be employed.
tißvanddáâ;v
In theAny
present
suitable
in: o l5 to the core of Íthe eletcromagnet 8. The alarm“ " "
l
Y _ . i ‘ ativelyso.
¿nections
Eïtlireaded
with'ihe
that
in »the
afsllpliortïandhaving
Icon'doctors’'Jil-ganci
contacts lßyand V52
suri'velicom5l, matitev
respec#V - ‘
circuit remains `closed untilthe switch f4, or 20 `
j fstanceitconsistsoi a standard 64„a vertical arm`
,
,ig
tilted
opened.
to ftheShould
right. theY
tllebase
pendulum-¿will
member T6gravitate-v
become
‘ lili,4 spacing Àmenihers*S8 and ‘l0 and irlsulation~~~H »
f T2, all of which are clampedtogether‘with bolts;vr ._ into .engagement Withcontact 52 and _close the .
,le insulatèd'from the conductors 4l and Eiland . *shuntcircuitthrough wires 43 and >5_0, conductor4 __ Y "
i hependulum lili'. In'addition.totheinsulation' 5f, Contact' 52, pendulum 45 and `Wire M; thus _i l "
"12; `other."insulation is remployed where needed;
¿l ~ resulting in the short circuiting of thejresistance ~
l2 and closing ofthe alarm circuit, l .
`
Thestandar’d-Biissecuredat its lower end l’.`
."uponla
l-Hroclzalilebase
element
member’lïß
7_3 and
mounted
proridcdat'its‘other‘>Ã>
at one end una
_f_the
»‘sill
Itlight
effectgclosing
has al1-early>
circuit (ill`
been'statedihptv
o_fmay
the be
alarm
closed
circuit,f
when
the and
de_s_ired’.l`
how
¿4i
‘_ end with aser, 'screw Blwhereby it may be ad,- «
" .iusted to a level-‘position determined by a suitable
¿From the foregoing it is apparent thatI. havev
. indicator consisting` inthe present instance of a -i Y‘ »provided a burglar alarm ,Whichiswell‘ adapted ' Í
‘ freelyl mounted pointer 82 and vanindex mark 84.@ l _ for the purpose intended; and while I have shown
`'The Ievelgindicatorlmay be `observed through a
` small windowfliä inv-a burgler-proof casing 86
v fixed uponithe base ~memb`er ‘I6 to protect the
~ pendulum'liâ‘, theassociated contactsAS, 52, the
_
a.r preferred ari'angementío'f my alarm system, 1
._1 tions
reserve
thereof»
all >rights
as properly
to suclichanges
fallwithinand
the`modiiicascope ci ~,
‘_-t-h'e invention as claimed.
. resistance Vl2 and the shunt circuit .wires `against _
- tampering by unauthorized persons. .
'
¿The main `circuit wires 2> and 4 may "oe of
f
_
«
._
f
Having thus described'my invention,y what `I
‘
a‘n§,«11._`
l ; f« claim and 'desire to secure by Letters‘Patent, is: 1
i
'In a portable burglar alarm, a pair of resilient
length, so that the casing 86 and partsassociated ` ï ‘ spaced vertical conductors arranged adjacent‘to
1
therewith canjbe placed a considerable distance„ ` eachother, a vertically disposed' resilient. pendu-_y;` L "
`from tliealarmcircuit..k _For instance, the casing f -`lum suspeudedbetween but` outof .engagement l
` _garage
8_6 can while;
loelplaced'inv
the alarm
an circuit
automobilestored
can be located
in inv
a “ ‘ 'with said conductors, supportingmeans including' ' _
`
a standard arrangedadjacent toV one of the` con-k ` ` '
the` horneto notify .the owner: iî an attempt is » ¿doctors and a vertical arm disposedadjacent to
f made to steal the automobile, or ifa wheel is
the other conductor, insulated means .interposed -` ‘l " 1
__
`being `jacloed up forthe purpose of removing a tire ^
between the upper portions of the `conductors and
_ the pendulum and betwecntlle standard and the „
` l
armynieans for rigidly clamping the upper por
if
and
therefrom.>
eitnero'ne‘op
4 are either
Preferably
armored
both >arecut
`the
or concealed.
main
theelectromagnet
circuitHowever,`
wires :2 . `»carried
tions'oiby
tlieíoregoing
‘the Astandard‘and“the-arm
elements together,
and‘ihaving
means ’ » ».
.,‘î-Bwill `become completely »deenerëglzed und vpermit . '
springt! _topull the armature I5 .against contact
1 Bland thus closethe burglar alarm circuit.
, n
T a Vswivel connection with each_`conductor for ad
`
`justine they lower portions of the latter toward
closed and switch 24'issin engagement with con- _`
y
` ` `
Assuming tliatgthe switches`> I4 and „20 arev ` _
, mally
or away
vretaining
from thethe
pendulum,
standard
andl
andthe»
means `for
armnorin _v'»
tact' 25, andthatthebase meinber‘îß, with asso- >
vertical .position to normally maintain the pendus.>
’ evident>
elated parts;>
that'in
is theI
placed
event
onthe
a latter
mobileob'je'cait
is moved and,
is ..
.lum Vin neutral position., said pendulum being . - . ~
r adapted to gravita'te` and earn/‘one` of ’ its con~ Í
f vtacts into Vengagement with one> oi the other con- Í
"fcause‘s said basemernberw inc-line towards its
leit'end, the-„pendulum 46 »will Ygravitate intov
'
. _
engagementfwith the contact‘liß ancij'ïclose` the` '
z`
tacts and >close an alarm ’circuit iî‘the" standard ‘
tilted in one direction or, gravitate in anop~ _shuntcirciiitlthrough wire 43, -conductor 4l, conf" l is
posite direction and carryits other* _contact into f f -ï
tact 6B, pendulum `4'6- and wire 44 and lthereby
. engagement with the'companion contact and close
_. Y.
»
o l , . short circuit the resistance i2. Thus the strength' jV >’the alarm circuit if tliestandard is tilted in a< _ _
oí the current, flovvingth'rough the electromagnet
`ll. is vincreased surticiently‘to overcome .spring 40
'
and attractthearmature `I5 against contact v3|-,V
reverse direction.
l z
CHARLESE.YOUNG.>
~ f «f
s
i
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