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Патент USA US2116246

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May 3,1938.
Filed June ‘20; 1934
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9'9 9/
/07 '
96' _
Patented May 3, 1938
‘PAT ENT oFFics _ “
g ‘ "‘Bolier‘lt‘Mac-Vdonald,
Loo-K AND swrron
I - - Annamaria‘ ‘20, 1934.‘ Serial No. 731,548 “
. ‘This inventionlrelates toilock and» switch de
vices and is ‘particularly concerned with novel and
improved locks and switches‘ in: which ‘are incor
porated novel features'applicable to a‘variety of
devices of this ge‘neral'class. . ‘
The invention herein ‘disclosed ‘maybe con‘
sidered a division, in part, of my copen‘ding ap
plication, Serial No. 658,978,.?‘1ed-1February'28,
1933 and matured into Patent‘No. 2,057,532, issued
October 13, 1936.‘ In this‘ patent‘fhave-shown
and described a novel key or'operating member,
limited to keys and locks. It is applicable‘toga
great variety of switching devices used‘in widely
In addition to the operating circuit‘previously
mentioned above which is closed when-the: ser- 5
rated portion ‘of the keyis'brought‘into engage‘
ment with the serrated portion ofthe‘% wardpI
have provided a safety‘ or hazard circuit which is
actuated in case of tampering with the device.
This hazard circuit comprises‘ conductors dis‘- ‘10
posed within the ward portion in the device-and
shell in which is disposed a bit made of‘ insulating
also forming contacts on the serrated I'porticin
thereof. The conductors corresponding to the
material. This bit maybe provided with grooves
hazard contacts on the ward are wired to. a signal
‘for looks and ‘switchingddevices;-'cornprising\a
'r" and notches according‘ to known‘ devices of ‘this or control circuit in which may be included an
character, or it may‘ represent the‘ replica of at i alarm, if desired. This circuit is closed‘. at ‘such
least part of a fingerprint.“ If the bit of the key time when a wrong key or operating memberis
carries such a fingerprint?it‘will represent not inserted or in case of any tamperingv with the
‘only an: operating ~member>1in "the? ordinary ' and i device. An electro-magnetic device included in
known :sense ‘but an‘ operating‘ member! ‘which the hazard circuit is actuated and initiates‘the “20
carries individual identi?cation“ marks; “In the necessary signalling and control operations.
bit are disposed ‘conductors forming contacts on
the surface thereof, that is to say, forming con
tacts ‘along its“ serrated ‘portion. The ‘ lock
or switching device to be operated by such a key
or actuating member carries‘ a serrated portion
or ward made of insulating material‘ and repre
senting the counterpart‘ of ‘the bit‘. In other
‘words, the bit of the key and ‘the ward of the lock
are each provided with an insulating member on
which are disposed grooves or ‘serrations‘corre
spending either to any known and desired scheme
or representing characteristic lines taken from
a'?nger print. Conductors are ‘also disposed in
0 the ward portioniof the switch or look, forming
contacts along the serrated portion thereof and
adapted to form a‘circuit with ‘the contacts. and
.conductors on the bit of the key or actuating
member. The circuit is completed when the ser
40 rated portion of the key meshes with or engages
the serrated ‘portion of the ward for the purpose
of actuating electric mechanisms to perform the
locking, unlocking or other switching functions,
‘depending on the purpose for WhichLthe device
is intended.
'7 ‘
It may be mentioned at this point that I use
the terms “bit” and “ward” in the broadest
sense to designate the. serrated portions on vthe
operating member . and on the corresponding
rected to improvements on these features.
The invention will be described. with reference
to the accompanying drawing in which
. .
Fig. 1 shows one embodiment of a key or actu
ating member having on oneof its sides aserrated 30
portion representing the bit;
Fig. 2 is a longitudinal ‘cross section thruan
embodiment of a complete switching device; and
ig. 3 is a transverse. cross section'thru the
device shown in Fig. ‘2, substantially along‘ ‘the 35
lines 3-3 and looking in the direction. of the
Referring now to Fig. 1, the operatingmemb‘er
shown in this ?gure comprises a shell or‘housing
designated by reference numeral ll. At one. end
of this shell is a handle portion l2 which may be
formed somewhat like the usual handle portion
on an ordinary key. The edge 13 of this operat
ing member may be rounded. Enclosed in ‘the
shell“! I is an insulating member M having aiuni- 40
form or. sectional grooved or serrated face as
lents thereof are likewise used merely for thesake
of ‘convenient description‘. ‘ I have. adopted‘ these
shown. The serrations maybe in vaccordance
with a speci?c finger‘ print,- that is, characteristic
lines may betaken from a finger print and pro
vided on the‘ face of theI insulatingmemberJI‘ 14
as indicated. Any other design or ‘scheme may
be ‘used in place'of the ?nger print. This insu‘s
lating member contains conductors iforrn‘ing. con‘:
terms from ‘the terminology-ofwlocks but, his
tacts on the face of the serrated portion as is his
member, ‘respectively, vwhich‘ ‘is! disposed; in the
device. :'The terms “key”l.and “lock” or‘equiva
The following description and appendedclaims
are chiefly directed to the features referring to
the switching and locking device as disclosed in
the above mentioned prior case and are ‘also;di 25
understood, that the‘inventioniisrnot in anyway
dicated in the drawing by the'reference numeral 55.
I5. Certain ones of these contacts may be blind,
that is, may be merely contact points without
serving any particular function in the circuit
operations which I will presently describe, while
certain other contacts are parts of or connected
with the aforementioned conductors contained
within the bit or enclosed thereby.
The above described switching means or key
is particularly suitable in case of a device where
10 the key is inserted and rotated in order to effect
engagement of its grooved portion with the
grooved face of a control member enclosed within
the device. The key may also take the form of
a. member that is simply pushed into the lock and
vthe required engagement with the ‘internally dis
posed control member is eifected either mechani
cally or electrically by moving the entire ‘key
against the enclosed control member, as de
scribed in the prior case.
In Figs. 2 and 3 is shown a switching device
incorporating ‘the :features previously ‘indicated,
withladditional features appearing from :the fol
lowing detailed explanation. This device uses a
1key-ias‘noted above, that is, one which slides ‘into
‘the corresponding ‘aperture of thedevice, its‘ac
tuation depending upon electrical features :de
scribed‘ below.
. '
The key "90 ‘shown in Fig. '2 consists of a ‘?at
shell containing ‘the bit '91.
However, whereas
EN the bit shown in the previous disclosure was
in spite of the attraction of the key guide and
key into engagement with the ward. The sole
noids l03--l04 remain energized. Hazard con
ductors and contacts corresponding thereto are
also provided in the ward I01. These hazard
conductors may be grouped in any desired man
ner and the resulting groups may be connected
to the alarm conductors ll2—ll3. In case a
circuit is closed either fromv ground over any of
the points connected to the conductor 4 i3 or over
any @pair of contacts of any group of wires con
nected to conductors “2-! IS, the signal device
orrelay I l?energizes in circuit with the alarm I I4,
and thereby actuates the contact H0’ to open
‘the operating circuit in addition to initiating the 15
requiredsignaling operations.
Assuming now that the key 9|] is to be with-.
drawn 'from 'thedevice, a pull will be exerted on
the key and this pull will ?rst effect the spring
92 which aligns the bit 9| of the key housing.
The ‘bit itself remains in engagement ‘with {the
‘ward 101. The spring ‘92 is compressed, that :is,
the vshell'rof the'key slides to the right while ‘the
bit "remains in engagement with ‘the ward. The
circuit of the solenoids 103-404 is now broken
at the contacts 91-99. The solenoids 'de-ener
vgize and drop the key guide 98.
The key as
sumes the ‘position ‘shown in ‘the drawing and
'canrnow be “completelywlthdrawn.
‘Changes and ‘modi?cations may ‘be “carried out 30
?xed in "the shell of the key, the bit member ‘91
withinthescope-andspirit of the following claims
shown in Fig‘. 2 is longitudinally movable within in which I have de?ned ‘What -I believe is new
the shell of ‘the key. A spring 92 at one end of .in'the art.
the bit and a spring'93 at‘the other end thereof
I-claim as my invention:
‘exert a pressure on ‘the corresponding ‘ends of
1. A look and switch device of the class de
theibit member‘9'l, holding the‘bit member in a scribed'comprising, anenclosed substantially sta
predetermined "neutral position. A :groove 94 tionary control member, a removable ikeyvcarrying
maybe "provided ‘on the enclosed side of the‘bit a movablecompanion-control member, means for
‘8'! ‘for receiving ‘a projection '95 rising from the guiding said key :into said device ‘ to ' position said
material :of the shell of the -'key or provided movable [control member of said key opposite 40
thereon. ‘The bit ‘is thus longitudinally ‘movable said enclosed stationary control member ‘but
‘within ‘the shell of the key and the limits of spaced therefrom, electromagnetic ‘means, ‘con
movement depend on the springs 92'—93 and tact means on said key "for energizing said electro
to some extent on the vcooperation of the projec
magnetic ‘means vupon insertion of ‘said key where
vtion '95 with the notch '94. The projection 95 by=said key is moved to position the control'mem 45
tends to ‘align the bit properly within the ‘shell ber thereof inengagement withsaid enclosed-sta
of'the'key. It is understood, o'f'course, that other tionary~control member and to maintain‘the-en
aligning means may be employed-in vplace of'those gagement therebetweemsaid[movable companion
which I have shown. At the forward end of the control member of said key remaining initially in
key ‘90 ‘is provided an insulating member ‘96 car
engagement with said stationaryenclosed ‘control
rying a contact 91.
member ‘upon withdrawal 'of ‘said key from said
Since the otherimportant component "parts of. device, "whereby said ‘electromagnetic means is
the device are already known from “the prior ?rst deenergized to release the engagement be—
case, I ‘will limit the ‘following ‘explanation chie?y tween said control members prior to full with
to ‘thefunctions of this embodiment.
drawaliof said key from saiddevice. ‘
~When the 'key 9|] is pushed into the ‘key guide
2. ‘In a lock'and 'switch device, an enclosed
98, it will ?nally come to a stop at the moment stationary grooved fcontrol member, ‘a removable
vwhen ‘the contact 91 engages .a pair 'of ‘con
\tacts 99. These contacts are wired ‘to the con
ductors 100-401. A circuit ‘is now ‘closed from
the battery "I02 over the ‘wires 'IllO-l?'l 'to the
windings of the solenoids I03 and 164 ‘and back
tothebattery I‘UZ by'way of conductors ‘IDS-I06.
key foroperating said device, a'movable ‘grooved
companion control ‘memberon said ‘key, electro
magnetic-operating means, means on said key for
energizing said operating means upon 'full in
sertionof said :key in vsaid device whereby said
key is ‘mcvedagainst said stationary control mem
The solenoids attract ‘their ‘plungers'or arma- ‘ ber to effect engagement of the movable grooved
tures and ‘the (key 'guide 98 is lifted upwardly control member thereon with said grooved sta
until the serrated'portion of the bit "of the oper
tionary vcontrol member ‘to actuate said device,
ating member 90 is‘in engagement with the .ser
said grooved control members remaining in en
rated portion of the ward I07. ‘A circuit is 'now gagement upon partial Withdrawal of said key
closed over'the conductors I‘DB-JHJS and contact until said electromagnetic means is deenergized
70 5M0’ for the-energiza‘tion of the elec'tro-magnet by said "partial withdrawal-of said key whereby
Hi. It may be remarked at this point that the the engagement of said igrooved members is
contact'9'l at the-end of ‘the‘key 90, which initially broken.
closes the ‘circuit :for the operation of the sole
BpThe-structure ‘de?ned in claim 2, wherein
noids 103-404 ‘is large enough so that the con
said key comprises a metallic shell having an
nection and the resulting ‘circuit is maintained opening, an insulating body contained in said
shell and carrying a grooved face disposed in said
opening, said insulating body constituting said
movable grooved companion control member, re
silient means for centering said insulating body
withrespect to said opening and said shell, said in
sulating body being movable against said resilient
means with respect to said shell, and contact
means at the end of said key constituting said
means on said key for energizing said operating
means upon full insertion of said key in said de
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