Nov. 27, 1951
D. N. JEWETT
2,576,511
PUSH BAR ASSEMBLY
Filed March 21, 1949
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Patented Nov. Z7, 1951
»_ -.UNITED
` 2,576,511
STATES PATENT> OFFICE
2,576,511
PUSH BAR ASSEMBLY
Deane N. Jewett, Detroit, Mich., assigner to
Detroit Hardware Manufacturing Company,
Detroit, Mich., a corporation of Michigan
Application March 21, 1949,` Serial No. 82,508
7 Claims.
1
2
This invention relates to building hardware,
and in particular, to push-pull bars for doors.
One object of this invention is to provide a
push-pull bar construction for attachment to
the opposite sides of the door in such a manner
that the attachment devices are concealed from
view in an opaque door and show only two screws
at the meeting ends of the bars in a transparent
door.
(Cl. 16-1)
~
'
Another object is to provide a blind attach
ment construction for push-pull bars for doors
of either opaque or transparent construction,
wherein the usual screw plates are eliminated
and the only visible evidence of attachment in
a door with an opaque door frame is the counter
sunk head of «a single screw at each end of one
of the push bars, even this screw head being
visible only by looking up at the bar from be
Doors of commercial and residential buildings
are frequently equipped with so-called “push
pull bars” for assisting persons to open and close
the door by applying pressure to the bars in the
appropriate direction. Such bars are frequently
used on swinging doors so that the door may be
opened from either direction by pushing or pull
ing the push bar on that side of the door. In
the past, it has often been the practice to secure
the ends of suchvpush bars to the door by means
of screw plates mounted on the opposite sides
of the door. Such screw plates, however, are
not only very visible but also are unsatisfactory
for use with glass doors or doors with tubular
metal frames which have very narrow stiles or
backing plates. With transparent doors, more
over, such as are frequently found in modern
stores, apartment buildings or the like, these
prior attachment arrangements are ugly in ap
Another object is to provide a blind attach 20 pearance in contrast to the beauty and modernity
ment construction for push-pull bars for doors
of appearance of a completely transparent door
having no door frame.
of either opaque or transparent construction
wherein one of the bars is secured to the door
The push-pull bar construction of the present
frame by a pair of concealed screws at either end,
invention'eliminates the disadvantages of these
and the other bar has its ends secured to the SEIS prior doors by securing each end of one of the
opposite side of the door frame by being attached
push bars to the door or door frame by a pair of
to blocks held by the same pair of screws which
connecting screws threaded into the end from
hold the opposite push bar against the opposite
the opposite side of the door through a block
side of the door.
having sockets which receive thel heads of locat~
ing studs threaded into the adjacent end of the
. Another object is to provide a blind attachment ;
other push bar. The heads of the locating studs,
construction for push-pull bars for doors. as set
in turn, are held in these sockets by `a single
forth in the object immediately preceding, where
anchoring screw passing upward through the
in the second push bar is attached at its ends to
head of the lower stud and threaded into the
the attachment blocks by pairs of studs having
their heads seated in sockets in the blocks and :. head of the upper stud. In this manner, only
the head of a single screw is visible at each end
secured therein by a single screw passing upward
of one only of the push bars, and even this screw
from beneath the block through Athe heads o1'
head is countersunk into the bottom of the block
both studs, thereby resulting in a completely con
and can be seen only by stooping so as to look
cealed connection for opaque door frames when
up at the push bar from below.
the push bars are viewed from any direction ex
cept upward from below one of the push bars.
Moreover, in the present invention, there is no
need for the attachment plates or backing plates
In the drawings:
hitherto required, and the Stiles of the door frame
Figure 1 is -a horizontal section through a door
can be as narrow as desired, or may be omitted
with an opaque door frame taken along the line
altogether, as in transparent frameless doors. In
l‘-I in Figure 4 and showing the push-pull bar
addition to the single anchoring screw at each
construction of the present invention in top plan
end beneath one of the push barsy the only visible
view, partly in horizontal section at the ends of
evidence of attachment, even in a transparent
the bars;
l
Figure 2 is a vertical longitudinal section along
door, is the pair of screws passing through the
the line 2-2 in Figure 1;
door into each end of the other push bar. Thus,
the number cf parts in the present invention is
Figure 3 is a vertical cross-section along the
line 3-3 in Figure 1; and
not only reduced to a minimum but these parts
Figure 4 is a reduced perspective view of a door
are for the most part concealed from view. The
neath it.
»
equipped with the push-pull bar construction of
Figures 1 to 3 inclusive.
'
ñnished push-pull bar construction, moreover, is
of clean, modern-appearing design with no pro->
2,576,511
3
,
_
jectlng parts or separate attachment members to
mar the beauty of its appearance.
Referring to the drawings in detail, Figures l
and 4 show a conventional door, generally desig
nated I0, equipped with a push bar assembly,
generally designated I I which in turn includes
push bars I2 and I3 and attachment blocks I4.
The door IIJ may be ofany conventional con
push bar assembly II, therefore, the anchoring
screws 34 are first removed, thereby permitting
the push bar 20 and its studs 29 to be With
drawn from the sockets 21 in the attachment
5 blocks I4. This exposes the heads of the connect
ing screws 24 so that they may be removed by
the use of a screw driver inserted in the sockets
21. ' The removal of the connecting screws 24
Vfrom the threaded bores V23'and therstile bores 25
struction, that shown having wood Stiles or up
releases the push bar I9 on one side of the door
right frame members I5 interconnected by hori
and permits the attachment blocks I4 to be de
tached from the other side of the door.
The concealed push bar construction of the
present invention may also be used with certain
types of swinging doors when the inner end of
zontal members I6 and I1 at top and bottom re- Y
spectiv-ely, these enclosing a glass central panel
I8. This construction, however, may optionally
be partly or wholly metallic, or the door may con
sist throughout of a single panel of transparent
material such as glass, without any stiles what
ever. The details of the door form no part of
' the -push bar is bent toward the door and closely
the present invention.
into parallelism withthe door so as to avoid col
lision with the door frame when the door is swung
to and fro. The outer ends of such push bars may
The push bars I2 and I3 have elongated cen
tral portions I9 and 2D in their opposite ends 2l 20 employ the construction of the present invention
and 22 bent into parallelism. The ends 2l are
longer than the ends 22 (Figure 1) by the lengths
as shown in thevdrawings and as described above.
What I- claim is:
. 1. A concealedly-attached push bar assembly
for a door, comprising a ñrst- push bar member
of the blocks I4 so that the appearances of the
push bar assemblies on opposite sides of the door
will be substantially the same. The ends 2l of 25 having at least one of its ends adapted for abut
ting one side of the door, an attachment member
the’ push bar I9 are bored and threaded as at
adapted for abutting the opposite side of the door,
23 to receive the threaded ends of attachment
a fastener adapted for extending through the
screws 24 passing through boresl 25 in the stil-es
door and interconnecting'said members, a sec
I5. A pair of screws 24, one above the other,
ond push bar member having> at least one of its
is preferably used at each end of the push bar i9,
ends engaging said attachment member, one of
and the Shanks of these screws pass through
said two last-mentioned members having a por
bores 26 in each block I4. The bores 26 open into
tion penetrating the other thereof, and an an
counterbores or sockets 21 which receive the
heads of the screws 24.
‘
-
` The opposite ends 22 of the push bar 22 are 35
choring element extending partially through the
penetrated member into locking engagement with
said penetrating portion with its axis disposed
transversely thereto and securing said second
bored and threaded as at 28 to receive the thread
ed portions of locating studs 29, the heads 3i) of
push bar member to said attachment member.
which are received in the sockets or counterbores
2. A concealedly-attached push bar assembly
21 (Figure 2). The heads 3B are provided With
bores 3I aligned with a bore 32 passing upward 40 for a door, comprising a first push bar member
having at least one of its ends adapted for abut
through the block I4 from a counterbore 33. The
ting one side of the door, an attachment member
counterborer 33 receives the head of an anchoring
adapted Afor abutting the opposite side of the door,
screw 34, the shank of which passes through the
a fastener adapted for extending through the
lower bore'3'I and is threaded into the upper bore
door
and interconnecting said members, a second
3I so as to secure the assembly together.. .
45
push bar member having at least one of its ends
In attaching the push bar assembly II to th-e
engaging saidattachment member, and an an
door I6, lthe .latter is provided with vertically
choring element securing said second' push bar.
spaced pairs of holes 25 at the desired level above
member to said attachment member, one of said
the floor,.and spaced to correspond with the
members on said opposite side of said door having
threaded bores 23. The connectingscrews 24 are
a recess therein and the other member having a
then inserted in the sockets 21 with their shanks
projection extending into said recess said anchor
passing through the bores 26 and through the
ing element extending partially through the re
holes V2,5v in the door stiles I5, after which they
cessed member into locking engagement with said`
are threaded into theV threaded holes 23'. When
the attachment blocks I4 have. thus been se 55 projection and with its-axis disposed transversely
to said projection.
"
cured firmly to one side of the stile I5 and the
3. A concealedly-attached push barv assembly
push bar I2 to the other side, the studs 29 are
for a door, comprising a first pushbar lmember
threaded- into their threaded sockets or holes 28
having at least one of its ends adapted for abut
and' turned until their transverse bores 3l are in
ting o_ne side of the door, an attachment member
alignment. They are then inserted in the sockets
adapted for abutting the opposite side of the door,
or counterbores 21 by pushing the ends 22 of the
a fastener adapted for extending through the
push bar 29 ñrmly against the blocks I4. While
door and interconnecting said members, a second
the parts are held in' this position, the anchoring
push bar member having at least one of its endsl
screws 34 are inserted from below into the coun
terbores 33, passed through the lower stud bore 65 engaging said attachment member, and an an
choring element securing said second push bar
3| and the attachment block bore 32 and thread
member to said attachment member, one of said
ed into the upper stud bore Si. When the an
members on said opposite side of said door hav
choring screws 34 are tightened, their heads en
ing a recess therein and the other member having
ter the counterbores 33 and accordingly become
70 a projection extending into said recess, said one
concealed therein.
member having a bore disposed transversely to
In this manner, the push bars I9 and 25J are
said recess and said anchoring element being se
connected to the door I0 with a virtually invisible
cured in Ysaid transverse bore and extending into
connection. If, however, it is desired to detach
locking engagement with said projection.
the push bars, this may be done by reversing the
procedure just described.> '_ In disassembling the 76 4. A concealedly-attached rpush bar assembly
El
2,576,511
for a door, comprising a ñrst push bar member
having at least one of its ends adapted for abut
ting one side of the door, an attachment member
adapted for abutting the opposite side of the door,
a fastener adapted for extending through the
door and interconnecting said members, a second
push bar member having at least one of its ends
engaging said attachment member; and an an
its ends engaging said attachment member, and
an anchoring element securing said second push
bar member to said attachment member, said at
tachment member having a recess therein and
said second push bar member having a headed
stud extending into said recess, the head of said
stud having a transverse cavity therein, said an
choring element engaging said stud cavity and
choring element securing said second push bar
securing said stud in said recess.
member to said attachment member, one of said 10
7. A concealedly-attached push bar assembly
members on said opposite side of said door having
a recess therein and the other member having a
projection extending into said recess, said one
for a door, comprising a first push bar member
having at least one of its ends adapted for abut
ting one side of the door, an attachment member
member and said projection having aligned bores
disposed transversely to said recess and said an
choring element being secured in said transverse
15
bores and extending into locking engagement
with said projection.
5. A concealedly-attached push bar assembly
adapted for abutting the opposite side of the door,
a fastener adapted for extending through the
door and interconnecting said members, a second
push bar member having at least one of its ends
engaging said attachment member, and an an
choring element securing said second push bar
for a door, comprising a ñrst push bar member 20 member to said attachment member, said attach
having at least one of its ends adapted for abut
ment member having a recess therein and said
ting one side of the door, an attachment member
second push bar member having a headed stud
adapted for abutting the opposite side of the door,
extending into said recess, the head of said stud
a fastener adapted for extending through the
and said attachment member having aligned
door and interconnecting said members, a second 25 bores disposed transversely to said recess andsaid
push bar member having at least one of its ends
anchoring element extending partially through
engaging said attachment member, and an an
one of said transverse bores and being secured
choring element securing said second push bar
in the other transverse bore.
member to said attachment member, said attach
ment member having a recess therein and said 30
DEANE» N. JEWET'I‘.
second push bar member having a headed stud
extending into said recess said anchoring element
REFERENCES CITED
extending partially through the recessed member
The following references are of record in the
into locking engagement with said stud and With
fue of this patent:
its axis disposed transversely to said stud.
UNITED STATES PATENTS
6. A concealedly-attached push bar assembly 35
for a door, comprising a ñrst push bar member
having at least one of its ends adapted for abut
ting one side of the door, an attachment member
Number
1,145,471
Name
Date
Dobrick ___________ __ July 6, 1915
adapted for abutting the opposite side of the
door, a fastener adapted for extending through 40 Number
FOREIGN PATENTS
the door and interconnecting said members, a
second push bar member having at least one of
Great Britain _____ __ June 8, 1922
France ___________ __ Mar. 31, 1927
180,933
619,309
Country
Date