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Патент USA US3039816

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June 19, 1962
3,039,806
W. W. RICE
DOOR LATCH
Original Filed April 6, 1956
W26
L: I l
INVENTOR.
MAL/AM W Rm;
BY
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H/s Arramvix
35
United States Patent 0
3,039,806
..
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Patented June 19, 1962
2
1:
Extending from the block 17 substantially at right
3,039,806
DOOR LATCH
William W. Rice, 3759 N. Lake Shore Drive, Chicago, Ill.
Substituted for abandoned application Ser. No. 576,701,
6, 1956. This application Mar. 16, 1961, Ser. No.
,
2
angles with respect to the screw 19 is an elongated bearing
?nger 22.
One end of this ?nger 22 is ?xedly secured
in the block .19 by means of a suitable set screw 23.
In use, to apply the latch to a door jamb and a door,
the latch ?nger 11 is projected into the keeper plate 24
of the door jamb 25, this being done with the door 26
in open position. The bearing ?nger 22 is then projected
through a selected opening of the openings 14, the selected
The invention disclosed in this application is the sub
ject of my abandoned application, ‘Serial No. 576,701 10 opening being an opening which will dispose the bearing
?nger 22 in close engagement with the adjacent surface
?led April 6, 1956.
27 of the door jamb. The screw 19 is then rotated by
This invention relates to certain new and useful im
manipulating the ?nger piece 21 to bear the foot 20
provements in a door latch especially designed and
against the adjacent surface 28 of the door 26.
adapted for latching an inwardly swinging door in locked
15
When completely installed, the parts of my door latch
position with rmpect to the door frame.
are arranged in the position shown in FIG. 3 ‘and are
An object of my invention is to provide a device of
related to the door jamb 27 with the latch ?nger 11 engag
the character hereinafter described which may be quickly
ing in the keeper opening 24’, the bearing ?nger 22
and easily applied to latch a door in locked position by
against the surface ‘27 of the door jamb, and the foot
one other than a skilled mechanic.
Another and equally important object of the invention 20 20 in bearing relation with the adjacent surface 28 of the
is to provide such a device which comprises relatively
door 26. In such position of the door latch, the door 26
is rigidly latched against opening and the same cannot be
few parts and which may be conveniently carried in the
opened by either having the door lock jimmied or the
pocket or in the luggage of the user.
My improved latch is especially designed to prevent
door lock opened by the use of a skeleton key or a
the opening of a locked inwardly swinging door by one 25 duplicate key.
endeavoring to gain unlawful entry into an occupied
My improved door latch will be especially usefully to
1 Claim. (or. 292-293)
room by jimmying the lock or by use of a skeleton or
duplicate key to unlock the door.
Another and equally important object of this invention
traveling salesmen, tourists, and those occupying rooms
in hotels, motel courts, and like places.
The several parts of my improved door latch may be
is to provide such a latch which comprises relatively few 30 formed of such material as will best serve the purpose
parts, thereby resulting in economical manufacture of
and ‘as will permit the door latch to be manufactured at
the same, thus permitting the door latch to be placed upon
an economical cost.
the market at a reasonable selling price.
Other objects will appear hereinafter.
The invention consists in the novel combination and
arrangement of parts to be hereinafter described and
claimed.
The invention will be best understood by reference
to the accompanying drawings showing the preferred
form of construction, and in which:
FIG. 1 is a perspective view of the invention;
FIG. 2 is a perspective view of the invention showing
the parts in exploded relation and in relation to a door
jamb;
FIG. 3 is atop plan view of the invention showing the
same in applied position with respect to a door and door
jamb;
In the form shown in FIGS. 1 to 3 inclusive, when the
device is not in applied position, the screw 19 is mounted
with a portion of the shank thereof disposed in the notch
16 and, when thus disposed, the bearing block 17 is
threaded against the ?ange 12, thus holding the bearing
block in the position shown in FIG. 1, in which position
the device may be conveniently stored away or carried in
the pocket or luggage or the like, for future use.
In FIGS. 4 and 5 I have illustrated the invention in
a modi?ed form of construction. In this connection,
the latch plate 29, like the latch plate 10, includes a latch
?nger 30 extending from one end of the plate 29 sub
stantially at right angles with respect thereto. The op
posite end portion of the plate 29 extends substantially
at right angles with respect thereto, and is reversely bent
FIG. 4 is a perspective view of the invention illustrat
to provide a socket 31 within which a bearing block 32
ing a modi?ed form of construction;
is mounted when the block 32 is not in applied position
FIG. 5 is a view of the modi?ed form shown in FIG. 50 to latch a door. From this block 32 extends a bearing
4, as viewed from the top, showing the same in applied
?nger 33 similar to the pin 22.
position with respect to a door and door jamb.
In FIG. 5, the form of construction illustrated in FIG.
Referring to FIGS. 1 to 3 inclusive, showing one form
4 is shown in applied position with respect to a door jamb
of construction of my invention, a latch plate is indicated
34 and a door 35. Like in the form of construction
at 10. This latch plate is of rigid construction and 55 shown in FIGS. 1 and 3, latch ?nger 30' engages in the
includes at one end a right-angularly extending latch
keeper slot 36 of the door jamb. The bearing ?nger 33
?nger 11 and at the other end portion a right-angularly
is projected through the proper slot of the slots 37 formed
extending ?ange 12 extending in the same general direc
in the keeper plate 29, to dispose the ?nger 33 in bearing
tion as the latch ?nger 11. The main body portion 13
engagement with the adjacent surface 38 of the door jamb
60
of the latch plate 10 is provided with a plurality of open
34. In this position of the parts with respect to the jamb
ings 14 which in the present instance are substantially
34 and door 35, as in the case of the form of construc~
rectangular in shape.
tion shown in FIGS. 1 and 3, the door 35 cannot be un
The ?ange 12 at its outer edge 15 has an open notch
authorizedly opened.
16 formed therein for reasons hereinafter more fully ex 65
When not in use, the block 32 is mounted in the socket
plained. A bearing block is indicated at 17 and may
31 provided by the latch plate 29, and when thus mounted
in the socket 31, the device may be conveniently stored
be formed of any suitable material. This block 17 is
away or carried in the pocket or luggage of the user until
provided with a threaded opening 18 and threaded into
future use.
this opening 18 is a pressure screw 19. At one end of
While I have illustrated and described the preferred
the screw 19 there is provided a foot 20 and at the op 70
form of construction for carrying my invention into effect,
posite end a pressure screw 19 is ?attened to provide a
?ngerpiece 21.
this is capable of variation and modi?cation without de
3,039,806
3
parting from the spirit of the invention. 1, therefore,
do not wish to be limited to the precise details of con
struction set forth, ‘but desire to avail myself of such
variations and modi?cations as come within the scope
of the appended claim.
Having thus described my invention, what I claim as
‘new and desire to protect by Letters Patent is:
A .door latch for latching a door against swinging move
ment in one direction with respect to a door jarnb includ
4
dinally with respect thereto and in a parallel direction
with respect to the bight portion of said U-shaped latch
plate, a door engaging footon one end portion of said
thread ‘bearing member of a size less than the thickness
5 of said block so as to have bearing engagement with a
surface of the door immediately adjacent said latch plate
when said bearing block is in facial abutment with said
latch plate, said thread bearing member at its end portion
opposite said foot being ?attened to provide a ?nger
ing a substantially U-shaped latch plate having one arm 10 piece, and ‘a storage means vfor said bearing block pro
thereof formed to provide a latch ?nger engageable in a
vided by said other arm of said latch plate which is
keeper slot of said door jamb, said U-shaped latch plate
adapted to frictionally hold said block and said bearing
having a plurality of openings formed in the bight portion
?nger when the same is not used as a door latch.
thereof, a bearing block, a bearing ?nger carried by said
block and extending substantially at right angles with 15
References Cited in the ?le of this patent
respect thereto and adapted to be projected through any
UNITED STATES PATENTS
one of said openings to a position substantially parallel
with respect to the latch ?nger and with said block in
facialrabutment with said latch plate, a thread ‘bearing
1,046,102
2,068,680
Noel _________________ __ Dec. 3, 1921
Holland _____________ __ Jan. 26, 1937
member carried by the block for adjustment longitu 20 2,160,460
McNaney ____________ __ May 30, 1939
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