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Патент USA US2131315

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Sept. 27, 1938.
Filed DeC. 7, 1937
Patented Sept. 27, 1938
i '
James Gordon Dunseath, Reno, Nev., assignor of
one-half to Harry Dunseath, Reno, Nev.
Application December 7, 1937, Serial No.`> 178,579
1 claim.
(ci. 70-905 Y
The present invention relates to new and useful improvements in locks particularly for the
sliding doors of show cases although> it will be
understood, of course, that the invention may
5 be used for any purpose for which it may be
found adapted and desirable,
Figure V12 is any elevational view of a portion
of the key.
Referring now to the drawing in detail, it«wi11 ,
be seen that the reference numeral I designates a
portion 0f a ShOW CaSe COmDl‘iSing Sliding doors
2 and 3.
The doors 2 and' 3 include inneriand
The primary object of the invention is to pro-
outer vertical meeting rails 4 and 5, respectively.
vide, in a manner as hereinafter set forth, a lock
of the aforementioned character comprising
10 means for positively securing the show case doors
in closed position, said lock further including
what may be referred to as e key plug which is
adapted to be removed when not in use,
Other objects of the invention are to provide a
15 look of the character described which will be
YlViOllniìeli in the Outer meeting Teilv 5 Vfind eX
tending therethrough is a metallic barrelß'. l-The
Outer end DOi‘iìiOn 0f the bOI‘e 'l 0f the barrel 6 is
comparatively simple in construction, Strong,
I0 which is recessed in the inner face of the meet
durable, highly efficient and reliable in use, compaet and which may be manufactured ai; 10W
ing rail 5 and Secured il’lel‘eÈO by SCI'eWS ll
The plate I0 has formed therein an opening I2
which is aligned with the bore 'I of the barrel 6
counterbored, as at 8. _ The reference numeral 9
designates diametrically opposite grooves which
extend longitudinally in the bore 'l and which
communicate with the counterbore 8. _Fixed on
the inner end 0f the barrel 6 is a metallic plate 15
A11 of the foregoing and stili further objects and into which ñanees I3 extend, said flanges 20
and advantages of the invention will become ClOSing the inner ends 0f the gI‘OOVeS 9. This is
apparent from a, study of the following speci- shown to advantage in Figs. 3 and 7 of the draw
ñcation, taken in connection with the accom- ing
panying drawing wherein like characters of
MOilnieCl in the inner meeting rail 4 and eX
25 reference designate corresponding parts through- JSendling iìheYeihI'Ough iS a metallic Sleeve I4 25
out the several Vìevvsy and wherein;
Which, When the doors 2 and 3 are in CIOsed
Figure 1 is a view in horizontal section through -DOSi'ßiOIL iS aligned With the barrel 6. As best
a portion of a show case equipped with a lock in Seen in Fig- 6 0f the drawing, the Outer end D01“-V
accordance with the present invention.
tiOn 0f the Sleeve i4 iS enlarged. as at l5.
Figure 2 is a View in front elevation, showing
The barrel 5 iS ÍOI‘ the reception 0f a remov- 30
the plug in the barre1 with the key removed.
Y able key plug which iS designated generally by
Figure 3 is a view in rear elevation, Showing the reference numeral I 6. The plug I6 includes
the plug mounted in the barreL
a metallic cylinder Il' which is insertable in the _
Figure 4 is a view in front elevation of the bore l 0f the barrel, Seid Cylindel‘ including a»
35 sleeve in the meeting rail of the innermost door flange i3 0n its Oili‘fel‘ end DOI‘iiOn Which iS e11- 35
which receives the pin 0n the plug.
’ gageable il). the COllIlteI‘bOI‘e 3 Of Said barrel.
Figure 5 is a, View in rear elevation of the The reference numeral I9 designates tumblers
sleeve shown in Fig. 4.
which are mounted in the cylinder Il. The tum
Figure 6 is e, view Showing a pori-,ion of the blers I9 are retracted through the medium of a
4:0 Outer meeting rail
Side elevation and a.Y por..
WhlCh iS insertable
the 'Cylinder
tion of the inner meeting rail in vertical section from the Outer end thereof (See Flg- 3)- The
with the lock in operative position therein.
Figure 7 is a view in front elevation of the
Figure 8 is an elevational View of the plug with
the key therein, the tumblers being retracted.
_ _
50 m Promoted Posltlon-
of the Cyhnder .n Whlch .1S çngageable m an 45
gäîsga'izâ ¿i? 2131 g' 12) Whmh 1s provlded there
key 20. is i‘eleasably secured in the plug IB
through the med~1um 0f _a Spring pressed latch 01'
detent 2l (see Fig. 11) 1n the outer end portion
I1 >is a neck 23 which terminates of
in a -segmental
Figure 10 1S 'an eleVa'tlOnal VleW 0f the Plug,
looklng at the lnnei" end t'fllei‘eOiFigure 11 is a cross sectional View through the
outer end portion of the plug, taken substan55 tially on the line Il-II oi Fig. 9.
head 24.
The head 24 is engageable behind the 50
flanges I3 when the doors 2 and 3 are locked, the
enlarged portion I5 of the sleeve I4 accommodat
ing said head. Projecting from the head 24 is a
pin 25 which >is engageable in the sleeve I4.
It is thought that the manner of using the lock 55 'i
will be readily apparent from a consideration of
the foregoing. As hereinbefore stated, when the
lock constructed in accordance with the present
invention will be readily understood and although
doors 2 and 3 of the show case I are in closed
position, the barrel 6 and the sleeve I 4 are aligned.
a preferred embodiment of the device is as illus
trated and described, it is to be understood that
changes in the details of construction may be re
sorted to which will fall within the scope of the
To retract the tumblers I 9, the key 2U is inserted
in the cylinder Il of the plug I 6. The plug I6,V
using the key 20 as a handle, is then inserted in
the barrel 6 in such a position that the segmental
head 24 thereon will pass between the ñanges I3
and enter the enlarged portion I5 of the sleeve
invention as claimed.
I4, the pin 25 entering said sleeve I4. The plug
on said plate and extending through said one
What is claimed is:
A lock for a pair of sliding doors, comprising
a plate secured on one of said doors, a barrel ñxed 10
I6 is then rotated to the position shown in Fig. 3 , door, the plate having an opening therein aligned
of the drawing to prevent withdrawal of the seg
mental head 24 between the ilangesI I3 and bring'v
the tumblers I9 into registry with the grooves 9.
The key 20 is then removed from the plug I6 and
the tumblers IS engage in the grooves 9 for se
curing said plug against rotation in the barrel 6.
with the bore of the barrel, said bore of the barrel
having longitudinal grooves therein, diametrically
opposite flanges in the opening in the plate at one
end of the grooves, a removable plugiinsertable in
the barrel and including a cylinder, a neck on one
It will thus be seen that the plug I6 is secured
end of said cylinder, a substantially segmental
head on said neck adapted to pass between the
against both rotary and longitudinal movement
flanges and engageable therebehind upon rotation 20
in the barrel 6. With the pin 25 engaged in the
sleeve I4 the doors 2 and 3 are, of course, locked
together. The foregoing operation is substantial
ly reversed to remove the plug I'I for unlocking
the doors 2 and 3. The latch or detent 2I secures
the,key 2U in the cylinder Il suñïlciently to permit
said key to be used as a handle for withdrawing
the plug I6 from the barrel 6.
It is believed that the many advantages of a.
of the cylinder for preventing withdrawal of said
cylinder from the barrel, key operated tumblers
mounted in the cylinder and engageable in the
grooves >for securing said cylinder against rotation
in the barrel, and a pin projecting from the head 25
and engageable in the other door for securing the
doors together.
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