U.S. patent number 3,680,260 [Application Number 05/036,287] was granted by the patent office on 1972-08-01 for frames lockable between stationary supports.
Invention is credited to Helmuth Bauer.
United States Patent |
3,680,260 |
Bauer |
August 1, 1972 |
FRAMES LOCKABLE BETWEEN STATIONARY SUPPORTS
Abstract
A frame, such as a guard screen in a doorway, is mounted between
its supports by pivotable links which can be moved into a dead
center condition, to lock the frame in effective position, by a
simple push on the frame by hand.
Inventors: |
Bauer; Helmuth (Munich,
DT) |
Family
ID: |
5733803 |
Appl.
No.: |
05/036,287 |
Filed: |
May 11, 1970 |
Foreign Application Priority Data
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May 9, 1971 [DT] |
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P 19 23 881.8 |
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Current U.S.
Class: |
49/465;
160/217 |
Current CPC
Class: |
E06B
9/02 (20130101); E06B 2009/002 (20130101) |
Current International
Class: |
E06B
9/02 (20060101); E06b 005/00 () |
Field of
Search: |
;160/215,216,217,136,222-228 ;49/463,465 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Taylor; Dennis L.
Claims
I claim:
1. A guard screen which can be inserted in an opening defined by
opposed stationary supports comprising a frame having a pair of
substantially vertically extending frame members, a pair of
substantially vertically extending bars, suction cup means on said
bars for attaching said bars to said supports, and link means
pivotally attached to said frame members and said bars, each of
said link means including a web portion having recesses for
receiving said frame members and said bars, stopping means
including a stop mounted on said frame for limiting the pivoting of
said links past dead center position of said links.
Description
This invention relates to a frame which is lockable between
stationary supports, for example a guard screen which can be
inserted in doorways, and has projections which are movable towards
the supports.
A frame of the kind to which this invention relates is eminently
usable as a guard screen for children, for example to separate two
rooms at an open doorway and prevent the child from entering the
adjacent room. These guard screens can also be inserted in the
surrounds of balcony doors or any other domestic areas. A further
utility location is in stalls, particularly stalls for small
animals. Frames of this nature are either provided with a wood or
metal screen or sometimes with a plastic screen, or incorporate a
taut network.
In a known form of guard screen for children the locking thereof,
for example in a doorway, is implemented by having a bar which
extends parallel to the upper part of the frame and can be
extended, by hand adjustment, towards the surround of the doorway
so that appropriate projections, which may for example be provided
with rubber suction heads, are held against this doorway surround.
This locking thus takes place, as indicated above, only above the
frame of the guard screen, whilst the latter is supported on the
ground in the usual fashion through feet rigidly connected to the
frame.
This known form of child guard screen has the drawback that on the
one hand the locking in the doorway surround is effected only by
the two opposed rubber suction heads and the child may be able to
shift the latter by applying a sufficient pressure against the
bottom margin of the guard screen. Moreover the manipulation of
this guard screen is somewhat complicated because the laterally
extending projections are applied against the frame of the doorway
by a helical or screw motion.
The object of the invention is to provide a frame to be locked
between stationary uprights, and in particular a guard screen to be
inserted in doorways, which is of a particularly simple
construction and can be readily manipulated.
This intention is served, in the present invention, by connecting
the aforesaid projections to the frame through pivotable elements
such as links. This link coupling provides for the locking of the
frame in its effective position by a simple application of pressure
from above or from below.
In accordance with a preferred embodiment of the invention the
links of at least two projections are connected together by a bar
or the like.
The bar connection of a plurality of projections disposed in the
plane of the frame caters, by virtue of the link system, for
instantaneous locking of the frame in its effective position, for
example simultaneous locking of at least two projections arranged
at one side thereof; should there be a symmetrical arrangement of
links at the opposite sides of the guard screen, a simple vertical
application of pressure on the screen will produce a simultaneous
locking at at least four points in the doorway frame surround.
This form of construction can be further improved by arranging that
at least the pivots of the links which are arranged on the frame
can only be moved when a substantial degree of friction is
overcome. This is aimed at preventing an unintentional movement of
the links.
To prevent the links pivoting beyond the dead center position
thereof when the aforesaid pressure is applied to the frame it is
advantageous to provide at least one link with an abutment or the
like for limiting the pivoting movement. In one form of
construction the abutment may comprise a pin or the like which is
displaceable on the frame, for instance over at least one of the
links; again the abutment or the like may comprise a further link
with a pin or the like slidable in a longitudinal slot therein;
this pin or the like may represent an extension of the pivot pin of
the link which is connected to the projection.
It is possible to perform the locking of the frame in other ways.
It is for example suggested that at least one link may be extended,
or extensible, to provide an actuating lever.
The bars or the like mentioned above may carry feet or the like
which can be placed on the floor.
Advantageously the bars or the like may be arranged or pivoted at
both sides of the frame.
The bars or the like can be interconnected by a lever system which
is displaceable relatively to the frame.
In a further modification of the invention the links are of U-shape
in cross section in the plane normal to the frame. The U-section
links preferably engage the ends of the frame and are recessed
correspondingly to the cross section of the frame, for example
semi-circularly; the semi-circular recess may form a limiting
abutment for the movement of the associated link.
Further it is possible for the frame to be extensible in one
direction at least. It is admitted that the possibility of an
extension of this nature is already known in connection with a
guard screen for children, but this has previously been arranged
directly on the projections so that before this known form of guard
screen is locked in the doorway the projections themselves have
first to be adjusted to the appropriate frame distance and the
locking only then performed by the lever movement. In contrast to
this, in the present invention the frame itself can be extended and
this, not only in the horizontal direction, but if desired also in
the vertical direction.
It is preferred with a frame according to the invention,
particularly a guard screen, to apply rubber parts, preferably
rubber suction heads, to the projections, but to facilitate the
locking, springs or the like acting in the locking direction may be
provided in the horizontal parts of the frame.
Embodiments of the invention have been illustrated by way of
example in the accompanying drawings and will now be described. In
these drawings:
FIG. 1 is a front view of a frame in accordance with the invention,
shown in its effective position,
FIG. 2 illustrates a detail in cross section on line 2--2 of FIG.
1,
FIG. 2a is a section on the line 2a--2a of FIG. 2,
FIG. 3 is a detail of a modified form of the invention,
FIGS. 4 and 4a show a detail of yet another modified form, and
FIG. 5 shows parts of a fourth embodiment of the invention.
The frame 1 in the examples illustrated is a guard screen of square
form and comprises a tubular framework 2 with a network fixed
within it. An appropriate frame of wood may be used instead of the
tubular metal framework 2; a grid of wood or plastics could be
incorporated in place of the network 3.
In FIG. 1 the frame 1 of the invention is disposed in a doorway 4.
Links 5, 6 and 7, 8 respectively are arranged at the two vertical
parts of the tubular framework 2 for locking the frame in effective
position, the other ends of these links being pivotally connected
in pairs to a bar 9, 10 respectively. Provided on the bar 9 are
projections 11 and 12 with rubber suction heads, and corresponding
projections 13 and 14 are arranged on the bar 10, for attaching the
bars 9 and 10 to the supports, viz. the side walls of the
doorway.
The frame is shown in FIG. 1 in its effective position, that is to
say in a position in which the links 5 to 8 have arrived at a
substantially horizontal position (that is to say almost the dead
center position). The links are of U-section, as can be seen from
FIGS. 2 and 2a, and particularly in the area between the bar 10 and
the corresponding part 20 of the framework 2.
The upper, i.e. vertical, web part 21 of link 7 is hollowed
approximately in semi-circular form at 22, as can be seen from FIG.
2. At one end the link is pivotally connected by screw bolt or a
pin 23 to the tubular part 20 and, at the other end, by a
corresponding screw bolt or pin 24 to the bar 10. The semi-circular
recess 22 thereby serves to limit the movement of the link when the
tubular framework 2 is pushed down into the effective position
(i.e. that illustrated in FIG. 1).
When the frame or guard screen is to be released from the position
illustrated in FIG. 1 it is lifted in the direction of arrows 25 so
that the ends of the four links 5 to 8 pivoted to the tubular
framework 2 are drawn upwards. As a consequence the frame is
released from its locked position.
Instead of using the links 5 to 8 and the bars 9 and 10, at least
one link 30 may, as shown in FIG. 3, be extended by a piece of flat
metal 31 to one side of the tubular framework 2 to provide a hand
grip. This grip can be further embellished by using at the free end
32 of strip 31 a projection 33, extending at right angles to the
plane of the drawing, for engagement by hand.
FIG. 3 shows the frame or guard screen in the effective position
wherein, to release the locking effect, the flat strip 31 has to be
lifted in the direction of arrow 34.
In the embodiment illustrated in FIG. 4 a projection 41 is provided
above the link 40, this either being rigidly secured to the tubular
framework 2, and thus providing a stop for the link 40 and the bar
9 in the dead center position, or a bar 50 (see FIG. 4a) can be
arranged in the horizontal part 42 of the tubular framework 2. This
bar can be withdrawn by gripping a finger piece 51 or can be
reinstated in the tubular framework 2 in the opposite direction.
Like the fixed stop 41, this bar 50 serves to limit the degree of
pivoting of the link.
Bars 9 and 10 may, as shown in the case of the embodiments of FIGS.
1 and 5, be provided with feet 53 and 54; the frame or guard screen
according to the invention may however be free of any such
additions and the frame bear directly on the ground.
A further form of stop is illustrated in FIG. 5. As previously,
links 60 and 61 are provided on the tubular framework 2 and are
connected together through the bar 9. A further link 63 is however
provided on the tubular framework 2, this having a longitudinal
slot 64 in which can slide an extension of the pivot pin 65 of link
61.
FIG. 5 shows a frame or guard screen which is similar to that shown
in FIG. 1 and is such that the link 63 can be turned about a pivot
66 to assume a position in which further upward movement of the bar
9 is prevented. This is brought about by the application of the
extended pivot pin 65 to the upper edge of the longitudinal slot
64.
* * * * *