close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2137504

код для вставки
Nov. 22, 1938.
J, J, O’CQNNELL ~
'
2,137,504
PIGKPRooF Loox
Filed Juné 12, 1957
,
,Jahn
Z.
l INVENTÓR
O’Connel]
TTORNEY5
A
Patented Nov. 22, 1938
2,137,504
UNITED STATES
PATENT OFFICE
2,137,504
PICKPROOF LOCK
John J. O’Connell, Brooklyn, N. Y.
Application June 12, 1937, Serial No. 147,811
4 Claims.
ing member also forming al stop 21. A spring 28
normally biases the plunger downward, the spring
auxiliary means are provided for making the
being held between head I8 and slide 30. With
the construction shown the ring 22 may be set
in recess 2| between heads I8 and 20 and held u
lock pick-proof.
s,
(Cl. 'l0-364)
The present invention relates to cylinder locks
and more particularly'to cylinder locks wherein
'
An object of the present invention is a lock
wherein auxiliary plungers are provided for se
curing the key plug against rotation 'and the
auxiliary plungers carry means for securing them
when in locking position. Another object is a
lock of this type wherein the auxiliary plungers
may be readily reset to released position. A fur
ther object is a lock of this type which may be
made in very small sizes. These and other ob
jects Will be readily understood from the follow
ing description with reference to the accompany
ing drawing, in which:
Fig. 1 is a sectional view of the preferred em
bodiment of the invention on the line I-I of
Fig. 2;
Fig. 2 is a sectional view taken on the line
2-2 of Fig. 1;
Fig. 3 is a fragmentary view of one auxiliary
plunger of Fig. 1 in locking position;
Fig. 4 is a view of another embodiment of the
invention on the line 4-4 of Fig. 5;
.
Fig. 5 is a sectional view on the line 5-5 of
Fig. 4; and
Fig. 6 is a. top view of the plungers of Fig. 4.
Referring to the drawing, the lock comprises
the usual barrel or cylinder 2, the key plug 4 hav
ing a keyway 6 therein, pin tumblers 8, drivers
I0, driver springs I2, and cylinder slide I4. The
drivers IIJ and pin tumblers 8 being so related
that upon the insertion of the proper key the
ï upper end of the pin tumblers 8 and lower end of
the drivers I0 are alined with the periphery of
the key plug 6 whereby turning of the key will
by positioning member 24, the entire assembly
may then be inserted in the barrel 2, spring'. 28
and slide 30 then being positioned, whereupon
the plunger will be positioned as shown in Figs. 1 l
and 2. If the key plug 4. is turned without the 10
proper key, plunger I6 will coact with one of
the pin -turnblers 8 whereupon spring ring 22
will expand beneath stop 2'I and lock the plunger
in place as shown in Fig. 3. To reset it is only
necessary to remove slide 30, drop out the parts
and reassemble. This construction is particu
larly adaptable to very small locks such as those
used in automobiles, and although only two
plungers I6 have been shown it is apparent that
one could be associated with each tumbler.
In the embodiment shown in Fig. 4 _the auX
iliary plungers 32 are provided with an enlarged
head 34 which, as shown, may be square or pro
vided with any suitable means to make it non
rotatable. The auxiliary plungersI are biased by
springs 3B and held in position by the usual socket
closure 38. Each auxiliary plunger 32 is provided
with a stop pin 40 which is biased against the
wall of the barrel by a spring 42. Arranged at
right angles to the plungers and alined with the
stop pins 40 is an opening 44 one end of which is
closed with a cap screw 4S.
Thus if the aux
iliary locking plunger moves to engage the key
plug should same be turned without the proper
key, the stop pin 40 will enter opening 44 and be 35
limited in its movement by cap screw 46 and
thus lock plunger 32 against movement. In like
rotate same. All the foregoing structure is com
mon to locks of this type.
manner plunger 48 will be locked against move
In accordance with the present invention there
is provided (Fig. 1) a set of auxiliary plungers
I6 arranged at an angle to the drivers I0 and
carried in bores II of cylinder 2 and adapted to
coact with pin tumblers 8 to lock the key plug
should the lock be picked or an unauthorized
key employed. Each plunger is provided with a
double head, the top head I8 having a smaller
diameter than the lower head 20, this con
struction allowing a split resilient ring 22 to be
and abut head 34 of plunger 32. With this con 40
struction it is possible to reset the auxiliary
plunger by removing closure 38, and then by re
moving cap screw 46 the stop pin 40 may be
pushed back into plunger head 34 by any suit
able wire and then raised into position, where
upon the next stop pin 40 may be repressed and
the next auxiliary plunger reset. It is also pos
sible to simply remove plug 46, push back the
carried in the recess 2l between the heads. The
bore is formed with a shoulder 25 on which rests
a positioning and stop member 24 having an
50
any suitable picking tool.
As in the ñrst embodiment the auxiliary plung
ers and stop pins are assembled and then inserted
in the sockets in a single operation. Although
only two auxiliary plungers have been shown and
their size has been enlarged for purposes of clear 55
inside diameter approximately that of the top
head I8 and an outside diameter greater than
the lower head 2D, the lower end of the position
ment by stop pin 43, which will enter opening 44
stop pin 40, and then raise the plunger by using
2
2,137,504
illustration, it is evident that one auxiliary plung
plunger is out of alinement with the pin tumblers
er could be associated With each key plug tum
bler I2.
As many changes could be made in the above
and for allowing the same to expand when in
construction and many apparently Widely differ
ent embodiments of this invention could be made
Without departing from the scope thereof, it is
intended that all matter contained in the above
description or shown in the accompanying draw
10 ing shall be interpreted as illustrative and not in
a limiting sense.
The following is claimed:
l. A lock comprising a cylinder, a key plug
rotatably mounted in the cylinder, a plurality
15 of pin tumblers carried by the plug, a plurality
of drivers carried by the cylinder and alinable
With the pin tumblers in one position, a plurality
of auxiliary plungers carried by the cylinder and
alinable with the pin tumblers when the key
plug is rotated from the first position, stop means
carried by the auxiliary plungers and adapted to
hold the same against movement when in engage
ment With the pin tumblers, and resilient means
for operating said stop means.
2. A look comprising a cylinder, a key plug
rotatably mounted in the cylinder, a plurality of
pin tumblers carried by the plug, a plurality of
drivers carried by the cylinder and alinable With
the pin tumblers in one position, a plurality of
30 auxiliary .plungers carried by the cylinder and
alinable With the pin tumblers when the key plug
is rotated from the first position, a resilient mem
ber carried by the plunger, means for maintain
ing the member in compressed position when the
alinement with the pin tumblers.
3. A lock comprising a cylinder, a key plug
rotatably mounted in the cylinder, a plurality of
pin tumblers carried by the key plug, a plurality
of drivers carried by the cylinder `and alinable`
with the pin tumblers in one position, a plurality
of auxiliary plungers carried by the cylinder and
alinable With the pin tumblers when rotated from 10
the first position, said plungers having a double
head and a recess between the heads, a resilient
split ring carried in the recess, a positioning
member adapted to ñt around the top head and
hold said ring under compression when said
plungers are out of alinement With the pin tum
blers, said positioning member having a down
Wardly facing shoulder beneath which said ring
Will expand when said plungers are in alinement
With the pin tumblers.
4. A lock comprising a cylinder, a key plug
rotatably mounted in the cylinder, a plurality
of pin tumblers carried by the key plug and alin
able with the pin tumblers in one position, a plu
rality of non-rotatable auxiliary plungers carried
by the cylinder and alinable With the pin tumblers
When the key plug is rotated from the first posi
tion, said cylinder having an opening therein at
right angles to the plungers, a stop` member
carried by said plungers and adapted to enter 30
said opening when the plungers aline with the
pin tumblers, and resilient >means for operating
said stop member.
JOHN J. O’CONNELL.
Документ
Категория
Без категории
Просмотров
0
Размер файла
291 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа