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April 19, 1949.
Filed May 20, 1946
//A!l- '0'y
Patented Apr. 19, 1949
Nick J. Duyn, Tucson, Ariz.
Applicationlviay 20, 1946,1Serial No. 671,097
4 Claims.
(Cl. 70-456)
This invention pertains to key cases and has
to provide adequate room for the key handles‘
within the rounded end portion‘3, while the ma
for its objects,
First, the provision of a key case wherein the
keys are pivotally fastened within a case body
and resiliently held in closed position by fric
tional engagement with the sides of the case;
‘Second, the .provision of a key case folded of
terial is joggled or bent inward at [4 toward the
blade ends to bring the plate portions closer to
gether for adequate gripping of the key'blades by
spring pressure.
a'?at'metal stamping so as toprovide a ?at pack
arcuately inward to contact the sides of the
A spring I5 is-attached to web will and extends
age wherein ‘key ‘handles may be vpivotally held
keys at a point inward from bolt 1. The spring
is shaped so that normally it ‘tends to force keys
out of the closure of the endpart of the case to
gether‘with spring means for normally forcing
the position indicated by dotted outline It‘. In
th‘ekeys to open 01‘ presented position when re“
this position the ?ank of either key may be easily
leased from said" compression ;
and conveniently grasped by the user and the key
‘ Thirdfth‘e "provision of a structure between the
cleared for insertion into a lock. 'The'keys may
blade holding ends of the case above mentioned
be said to be normally urged or biased to exposed
wherieby'the‘keyblades may be released from sai
or open position by this spring.
retaining compression by pressure simply ap
When the keys are rotated into closediposition
plied by the ‘?ngers to the rear portion of the
the blades are guided into place by the outwardly
20 ?ared entrance lips !l and retained by thebeads
"Other ‘objects vwill appear vhereinafter.
['8 which parallel the top or entrance edges of
"I'attain‘the‘fore'going objects ‘by means of the
this. part of‘ the case.
device illustrated in the accompanying draw
Inward swinging movement of the keys is lim
ings in ‘which—
ited by a tab'zll punched and bent upward ‘from
Figure 1 is a. plan View of a key case embodying 25 plate l2.
my ‘improvements ;
Inwardly extending lips !9 are formed along
Figure 2 is aside elevational view of the back
the rear edges of the blade holdingportion of'the
case body. These provide rigidity for-these rear
rFigure 31h'sid'e elevation-of the front;
edges as'well'as smooth ?nish.
Figure 4 a plan view with the ‘face sectioned 30
Beads l8>along the inner face o'f‘the ‘forward
within ‘one vend, and the blades retained by com
pression and "friction Within the other end to
oil showing interior construction;
Figure 5 is an elevational View of the blade
edges'are i'forined by inward creases just behind
> the ?ared lips ll.
They provide a retaining
holdlng’end showing details of the retaining and
means for key blades within the end '4 and en
releasing ‘mechanism, and
hance retention in addition to the friction ipro~
elf-Figure ~61 a‘section-taken in linet-t‘ of Figure l. 35 vided by the inherent spring pressure of the walls
isimila'r‘numeralsrefer-to similar parts in the
of the end portion 4.
several views.
‘Due to'the construction above explained'it will
The case body 2 is folded from a sheet metal
be apparent that the handle portions of the keys
blank to form a ?at package like container hav
are held in the rounded portion 3 of the case
ing a rounded end portion 3 substantially con 40 body, free to rotate, While due to the joggles M,
forming to the shape of a key head and a rec
the blades are compressed between the sides of
tangular shaped blade retainer end portion 4.
the blade holding portion 4.
Keys 5 and 6 are pivotally secured by a bolt ‘1
Tab 2!! is formed by a cut out portion in the
passing thru holes 8 in the head portion and thru
lower plate which is bent upward with the upper
holes customarily made in the handle portion. 45 edge becoming a fulcrum on which the blade re
The parts of the case are proportioned so that
taining portion 4 of the upper plate ll may be
it substantially encompasses the keys and the
blades of the keys will be enclosed between plates
of the blade retainer end 4.
In folding the blank from which the case
is formed a web I0 is provided joining the top
plate H and the bottom plate l2 along the back.
This provides longitudinal rigidity for the body
and acts as a de?nite spacing member between
rocked or twisted on a longitudinal axis, as shown
by dotted outline II’ by pressure applied at the
position indicated by arrows 2 I. When the bot
tom or compression edge is compressed, as indi
cated, the forward or entrance edge of this plate
portion ii is opened and the keys released from
frictional engagement with inner faces of the
I plates or walls and released from the retention
the plates. The web [0 is made su?iciently wide cu in of beads l8. The manipulation necessary for re
wall may be torsionally rocked; said wall portions
having torsion relieving slots extending trans
versely therein from each side at approximately
the position of the said bends; the said fulcrum
being arranged so that compression of the edge of
said blades opposite the key blade entrance edge
will expand said entrance edges and release key
lease is very simple and easy since it is only nec
essary to squeeze the rear edge of the plates
between thumb and ?rst ?nger. All keys swing
out together but I have found that the keys may
be more easily selected, after their release, by
sliding them between the thumb and ?nger than
when they must be selectively or independently
blades therefrom.
released from the case.
Ordinanily the case is made from thin spring
metal. However, heavier metal can be used and
in this event transverse slots 22 are cut into the
3. A key case for a plurality of flat keys ar
ranged side by side formed of spring material side
walls substantially encompassing the keys, said
walls being connected at the bottom at one
material at approximately the juncture between
end portion, means for pivotally mounting the
the handle holding area and the blade retaining
heads of the keys in said end portion, means to
area. This relieves the metal so that torsional
15 bias the keys for outward swing through the top
resistance is lessened.
of the case on the pivotal mounting for the heads,
From the foregoing it will be understood that
remaining portion of the side walls being un
I have provided an easily made simple and effec
and relieved {between the connected
tive key case which includes a minimum number
and unconnected portions for ?exibility, said
of parts. Some of which may be made in modi
fied forms and still remain within the spirit of 20 portion of the side walls being spaced less than
the width of the plural keys whereby the walls are
the invention. Therefore I wish tobe limited only
expanded at the top to receive and hold the key
by the following claims.
blades when swung therebetween by inherent
I claim:
spring pressure working against the ejecting
1. A key case composed of parallel side walls
of spring metal joined by aiweb shaped to provide
a key handle holding area and a blade holding
area; a bolt extending thru said handle holding
area adapted to retain keys between said walls so
they may be swung with the blades between the
walls of said blade holding area; a spring attached
to said web normally urging said keys outward
from said blade holding area; the wall portions of
said blade holding area a?ording mutual resilient
compression to retain the blades of keys swung
therebetween and having an entrance edge and a
compression edge adjacent said web; a tab form
ing a fulcrum positioned between said blade hold
ing portions of said walls so that compression of
said compression edge will open said entrance
bias, and an intermediate fulcrum carried by
one side Wall to permit automatic release oi.’ the
keys when the side walls are rocked by inward
pressure at the bottom portions thereof.
4. A key case for a plurality of flat keys ar
ranged side by side including a single piece of
spring material bent to form spaced sidewalls
substantially encompassing the keys‘, said side
walls comprising a connected end portion in which
the key heads are pivotally mounted and a ?exible
unconnected portion between which the key
‘blades are held by inherent spring pressure,
spring means to normally urge the key blades from
between the flexible side wall portion on the head
pivot, and an intermediate fulcrum carried by one
?exible side wall to permit automatic release of
edge to release key blades engaged therebetween.
the key blades for outward swing from the ?exible
2. A key case for ?at keys having a body com
side wall portion of the case when the walls are
posed of parallel walls of spring metal connected
rocked by inward pressure at the bottom portions
and spaced by a web along the back side thereof,
a tightening bolt passing thru an end of said case
to rotatively secure keys therein at their handle 45
portions so that they may be swung between
the walls at the opposite end of said case body;
said walls being inwardly bent to form key blade
The following references are of record in the
retaining portions which compressibly retain
?le of this patent:
blades of keys therebetween while the handle por 50
tions allow the key handles to swing freely; to
gether with a spring attached to said case nor
Fischer __________ __ Apr. 23, 1940
mally urging said key blades from [between said
Dieckmann _______ __ Apr. 14, 1942
walls, and an inwardly extending tab formed on
Mudrich __________ __ Sept. 8, 1942
the blade holding portion of one of said walls 5
adapted to act as a fulcrum on which the opposite
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