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Патент USA US2135010

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NOV. 1, 1938.
Filed June 17, 1953'
Patented Nov. 1, 1938.
PATENT orgies
Andrew Baxter Leven, Brisbane, Australia
Application June 1'7, 1933, Serial No. 676,372
In Australia June 17,1932
1 Claim. (Cl. 292-—267)
This invention relates to devices, known as
openers, stays, or holders, for use in opening
easements, windows, fanlights, and the like, and
for securing them in the open or closed position.
5 The device covered by this invention is such
that the easements or the like may be opened
and closed with little effort on the part of the
operator and then securely held in any desired
position. The device may be arranged to operate
10 left or right handed, and for the operation of
pivot hung windows it may be applied to any
type whether side pivot hung, center or out of
center vertical pivot hung, and so on.
The invention consists of a guide with a rack
15 formed thereon, a carrier slidable thereon, a
locking block rotatably carried thereby and hav-_
ing teeth thereon which can be caused to engage
with the teeth of the rack, and a ?nger piece on
the locking block. An arm or stay, articulated
20 at one end to the carrier, is provided with a piv
oted pin and base at the other end. According
to the type of window, the guide and rack are
the guide A and rack B with attendant parts
on the sash or window, as the case may be, but
it will be readily understood that there are cases,
such as in the case of fanlights and such like,
where it would be more advisable to place the
guide A and rack B with attendant parts on the
The device would be made of any suitable
metal and the details of construction and the
shapes of the various parts could be varied as 10
desired so long as the essential features of the
invention are retained.
The operation of the invention is: as follows:-—- 'i
To open the casement, window or fanlight, as the
case, may be, the ?nger piece E is raised as shown 15
in broken lines in Fig. 2. The teeth on the look
ing block D being thereby freed from the teeth
In of the rack B, the block D can be slid along
on the guide A causing the stay F to push open
the casement or the like. The, ?nger piece E is
then turned to the full line position and the
locking piece locked with the rack B.
secured to the sash or window frame, as the case
As the teeth D1 of the block‘ D are of inverted
may be, and the pivoted pin on the arm or stay V-shape they engage the diamond shaped teeth
25 is secured on the frame or sash.
In of the rack B with a cam or wedging action
In order that the invention may vbe better that insures a tight and non-rattling ?t without
understood it will now be more fully described requiring a strong effort on the part of the
with the aid of the accompanying drawing, in
Fig. 1 is a perspective view of one form of the
~Having now particularly described and ascer
tained the nature of my said invention and in
what manner the same is to be performed, I
Fig. 2 is a transverse sectional elevation;
declare that what I claim is:—-
Fig. 3 is a front view;
Fig. 4 is a top plan view of the rack engag
A device of the class described, comprising an
elongated guide, a rack formed on said guide,
35 ing surface of the locking block.
The invention consists of a guide A formed
with a rack B on its face. On this guide a
carrier C is slidably carried and it in turn carries
a locking block D capable of rotation and having
40 teeth D1 on one face.
These teeth D1, which
are preferably substantially inverted V shape,
normally engage the teeth l0 (preferably V or
the teeth of said rack being diamond-shaped
in plan to provide diverging wedge surfaces on
the portions of said teeth extending at right
angles to said guide, a carrier slidably mounted
on said guide, a rotatable locking block carried
by said carrier, said block having an arcuate
surface with its axis parallel to said rack, sub
stantially V-shaped teeth formed on said surface
of said block, said teeth being engageable with
diamond shape) of the rack B, as in Figs. 1, 2, 3,
and 4, but they may be rotated out of engage
said wedge surfaces of a selected rack tooth
45 ment, as in broken lines in Figure 2. The lock
ing block D is provided with and actuated by a
on said lock and frictionally maintain said block
?nger piece E.
whereby to wedge the latter between said teeth
in a rack tooth engaging position, and said block .
The stay F is articulated to the carrier 0 and
being rotatable on its aforesaid axis to withdraw
to a base or standard G which is secured to any
its teeth from engagement with said rack tooth
50 suitable support.
Generally speaking, the device will be used with
to permit said block to be slid along said guide.
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