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Патент USA US3056136

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Sept. 25., 1962
Filed May 26, 1958
BY Mm ?'
United States Patent C?lice
Patented Sept. 25, 1962
A battery 28 of dry cells is connected to one terminal
of a shunt lock switch 30‘, while the other terminal of
shunt lock switch 30 completes the series circuit back
This invention relates generally to burglar alarm de
vices, and more particularly it pertains to safe and vault
A great deal of damage is done by would-be thieves
or burglars in their attempts to break into safes. Of
ing circuit 58. This ring circuit connects to a normally
closed contact 40 of relay 38 and to a normally open
contact 44 of a latching relay 42.
The coil of relay 42 is connected in parallel with an
electric bell 46 and one side of this parallel circuit joins
to the common circuit 60. The other side of the parallel
circuit involving relay coil 42 and bell 46 connects to
contact 41 of relay 38.
In one embodiment of this invention, the above de
Frank Harry, 322 E. Lorraine Ave., Baltimore, Md.
Filed May 26, 1958, Ser. No. 737,613
6 Claims. (Cl. 340-274)
course, many alarms have been devised to warn of in
to microswitch 26 as well as dividing into a branch ring
truders to a premises and to the vicinity of the safe.
Other expedients have been resorted to to prevent the
scribed components mounted on a safe 12 is shown in
breaking into of safes and vaults, such as release of tear 15 FIG. 3. The microswitch 26 is necessarily mounted on
gas or actuation of alarms when the safe door is breached.
or adjacent to the combination lock 10‘ in this case on the
Thieves have been very clever in circumventing premises
inside of the door of the safe or vault 12. The shunt lock
alarms. Also, by the time a door alarm or break-in
30 is advantageously placed with only the keyhole there
warning is sounded or tear gas is released the damage is
of exposed. The rate of rise detector 34 is best placed
done, despite the accomplished objective of frightening 20 on the ceiling of the safe chamber and the vibration con
away the intruder.
tact 32 on one inside wall of the safe .12 as shown. Bell
Combination locks have numbers which are set for
46, together with the remaining components within the
releasing the lock. ‘It is a primary object of this inven
dotted lines of FIG. ‘2, is placed in a tamper-resistant box
tion to provide a further useful employment of these
48 mounted in a concealed position beneath the safe. An
25 aperture 50, communicating between the box 48 and the
numbers for setting an alarm when locking the safe.
Another object of this invention is to provide an alarm
chamber of the safe 12, is provided for electrical connec
which will sound when a safe combination knob is ro
In actual operation, when the night number is set on
To provide a disturbance sensitive safe, is yet another
dial 62 as previously described, contacts are closed there
30 by in microswitch 26. If the operator now turns his key
object of this invention.
To provide an alarm arrangement which is actuated by
locking shunt lock 30, an electric current ?ows from bat—
vibration, heat, or tampering of the safe or vault, is still
tery 28 into both circuits 56 and 58 for a moment and
another object of this invention.
through contacts 40 and 41 to bell 46. Relay 42 is slow
Still other objects of this invention are to provide safe
acting compared to the response of bell 46 and a single
and vault alarm arrangements which are economical to 35 stroke of the bell issues indicating to the operator that
manufacture and install, and which are e?icient and re
battery 28 is in good condition. Relay immediately pulls
liable in operational use.
open contacts 38. This relay 38 is energized through
These and other objects and advantages of this inven—
series circuit 56.
tion will become more readily apparent and understood
Any tampering rotation thereafter of the dial 62 will
from the accompanying speci?cation and single sheet of 40 open microswitch 26, or any striking of the safe will open
drawings, in which:
FIG. 1 is a perspective view, partly broken away, of
a combination lock for safes embodying principles of
the invention;
FIG. 2 is an electrical schematic diagram of the im
proved safe alarm;
vibration contacts 32. The heat of a cutting torch or
the like will cause rate-of-rise detector 34 to open. Final
ly, any tilting of the safe as a whole will open mercury
contacts 36. The above-named disturbances acting singly
45 or in combination, will cause relay 38 to release and
close its contacts 40‘ and 41. Relay 42 is consequently
FIG. 3 is a perspective view showing the preferred em
energized and locks itself closed through its contacts 44
bodiment of the present invention installed in a safe;
and 45. ‘Bell 46 now continuously sounds as an alarm.
FIG. 4 depicts an alternate cam which may be used
To disconnect the alarm, the key to shunt lock 30 must
be operated.
with the invention; and
FIG. 5 an eccentric pin type of actuating means.
To operate the actuator 24 of microswitch 26, the cam
Referring now to FIGS. 1 and 3 of the drawings, a
14 may alternatively be constructed with a notch ‘52 as
conventional safe or vault ‘12. is equipped with a combina
illustrated in FIG. 4. The microswitch required would
tion lock 10 having a numbered dial 62‘. Dial 62 is
then be of the closed contact type. In other words, the
provided with an integral shaft 64, by which tumblers. 66 55 electrical circuit would close when actuator 24 extended
are rotated. When the combination dial numbers are
into the notch 52 corresponding to the night number
properly sequenced, the ?nal rotation of shaft 64 engages
the pawl end of a lever 18 by means of cam 14 with
Still another alternative of the alarm device would
drawing a bolt 20. The door of the safe or vault 12 may
involve the provision ‘of a pin 54 on cam 14 as shown in
then be unlatched.
FIG. 5. This eccentrically mounted pin 54 on cam 14
To lock the safe or vault 12, the dial 62 is spun around
would then lbest cooperate with a microswitch actuator of
the well-known spring ?nger type.
a few revolutions to reset bolt 20‘ and randomly distribut
ing tumblers 66. In the present invention, a night num
Obviously, many modi?cations and variations of the
ber is thereafter set on dial 62. This night number cor
present invention are possible in light of the above teach
responds to the engagement of a raised portion 22 of cam 65 ings. ‘It is, therefore, to be understood that within the
14 with an actuator 24 of a microswitoh 26, as best seen
in FIGS. 1, 2, and 3.
A closed electrical circuit 56 is connected through
microswitch 26 leading serially through a vibration con
‘scope of the appended claims, the invention may ‘be prac
ticed otherwise than as speci?cally described.
What is claimed:
1. In a combination lock safe alarm, a combination
tact 32, a rate~of-rise heat detector 34, a mercury contact 70 lock having a dial provided with radially arranged num
36, and the coil of a sensitive fast-acting relay to a com
bers and an integral shaft secured to said dial, means in
mon circuit 60.
cluding spaced tumblers positioned ‘by said dial and shaft,
cams means movable by said dial shaft in unitary turns
relationship and having an elevated element thereon and
a depression therein, a movable bolt pivotally connected
to said cam means and engageable in said depression in
said cam means for throwing said bolt when said tumblers
are in a predetermined position, and a protective alarm
system including an electrical circuit having a closed
lock-out warning means in said circuit and means includ
ing a switch for completing said electrical circuit ‘for said
lockout warning means, ‘said switch being operable to 10
lockout by said cam means at a single dial position de
?ned by one of said radially arranged numbers being
positioned to correspond to said elevated element on
4. An arrangement as recited in claim 1, and addi
tionally means for sensing the attitude of ‘said safe to
actuate said lock-out Warning means.
5. An arrangement as recited in claim 1, and means
for rendering said lock-out Warning means inoperative.
6. An arrangement as recited in claim 1, and means
including a second electrical circuit ‘for continuously op
erating said lock-out warning means after disturbances
have ceased.
References Cited in the ?le of this patent
said cam means and to lockin at all other positions de
Rose ______ __i ________ __ May 5, 1925
?ned by said radially arranged numbers.
Fleming _____________ __ Feb. 24,
Gundlach ____________ __ Sept. 5,
Bateman ____________ __ Oct. 20,
Ricks _______________ __ ‘Feb. 17,
McLaughlin __________ __ Feb. 2,
Boyle _______________ __ Oct. 4,
2. An arrangement ‘as recited in claim 1, and addi
tionally heat sensitive means associated with said lock
out warning means for actuating said lock-out warning
means upon changes in temperature.
3. An arrangement ‘as recited in claim 1, and addi 20
tionally means for sensing the disturbances of said safe
to actuate said lock-out warning means.
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