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Патент USA US2405153

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Aug. 6, 1946.
w, KIRSCH
VENETIAN BLIND ADJUSTING MEANÉ
Filed July 20, 1945
i Z0
IZ
13
5
2,405,153
Patented Aug. 6, 1946
2,405,153
UNITED STATES PATENT GFFICE
2,405,153
VENETIAN BLIND ADJUSTING MEANS
Guy W. Kirsch, Sturgis, Mich., assignor to Kirsch
Company, St. Iloseph, Mich., a corporation of
Michigan
Application July 20, 1945, Serial No. 606,055
8 Claims.
(Cl. 1GO-_176)
1
2
This invention relates to improvements in Ve
netian blind adjusting means.
The main objects of this invention are:
First, to provide an adjusting mechanism for
the suspending tapes of Venetian blinds which
slat adjusting cords I4 are associated with this
permits of their being adjusted throughout their
pulley.
The shaft l0 is provided with a pinion l5 ro
tatable with the shaft, the pinion being arranged
between the brackets.
-
A cylindrically curved rack bearing member I6
full range of adjustment and the equalizing
preferably formed as a sheet metal stamping is
thereof as occasion may require.
mounted between the brackets and is provided
with tongues Il projecting through holes in the
brackets-see Fig. 5.
The cylindrically curved or barrel-like rack
member I9 is rotatably mounted on the bearing
member between the brackets, the brackets hav
ing tongues 2t at their upper ends overhanging
the rack member for retaining it. The rack
Second, to provide an adjusting mechanism for
Venetian blinds which is highly eflicient, permits
ready attachment of the tapes thereto, and one
which may be economically produced and assem
bled.
Objects relating to details and economies of the
invention will appear from the description to fol
member has a series of holes 2l therein providing
low. The invention is, defined and pointed out in
teeth 22 coacting with the teeth of the pinion, the
the claims.
bearing member having a transverse slot 23
A preferred embodiment of the invention is
through which the teeth of the pinion project
illustrated in the accompanying drawing, in
20 into engagement with the teeth of the rack, as _
which:
shown in Figs. 3 and 4. The number of teeth
Fig. l is a fragmentary elevation of a Venetian
preferably correspond to the number of teeth on
blind structure embodying the features of my
invention, parts being shown in conventional
the pinion.
tapes arranged in pairs and provided with suit
able slat supports 4 extending between the tapes,
these parts being conventional.
mounted within the housing. This arrangement
is conventional.
At each end of the rack teeth, the rack member
form.
Fig. 2 is an enlarged fragmentary view par 25 is provided with slots 24 of such length as t0
permit the rotation of the pinion in one direction
tially in section on line 2-2 of Fig. 3, parts being
without imparting rotative movement to the rack.
broken away to disclose details.
In the embodiment illustrated, the rack mem
Fig. 3 is a fragmentary transverse section on
ber has strap or bar-like portions 25 struck out
line 3--3 of Fig. 2.
therefrom to receive the end of the tapes, as
Fig. 4 is an enlarged fragmentary transverse
shown in Figs. 3 and 4.
section corresponding to that of Fig. 3 showing
With this arrangement of parts, the shaft may
the parts in one position of adjustment substan
be
manipulated to tilt the blinds through their
tially as shown by dotted lines therein.
suspending tapes and in the event of mis-adjust
Fig. 5 is an enlarged detail fragmentary view » ment the tapes can be readjusted by rotating the
showing the manner of mounting the rack sup
rack to one end or the other by actuating the
porting bearing member upon the supporting
shaft to bring either one of the slots into register
brackets.
with the pinion and thereby readjust the tapes.
In the accompanying drawing, I represents the
_Pull cords 26 are suitably connected to the
slats, 2 the bottom bar, and 3, 3 the suspending
bottom bar and are tightened with pulleys 21
I have illustrated and described my invention
The header!) is illustrated as of channel sec
in a, highly practical embodiment thereof both
tion and is mounted on the casing conventionally 45 from the standpoint of economy of manufacture
illustrated at 6. Within the housing I mount
and practicability. I have not attempted to il
pairs of supporting brackets ‘l preferably formed
lustrate or describe other embodiments or adap
as sheet metal stampings and secured at B to
tations as it is believed that this disclosure will
the bottom of the housing 9.
enable those skilled in the art to embody or adapt
The actuating shaft l0 is arranged longitudi 50 my invention as may be desired.
Y
nally of the housing through these brackets, being
Having thus described my invention, what I
preferably rotatably supported thereby. The
claim as new and desire to secure by Letters Pat
shaft is provided at one end With a worm gear
ent is:
and pinion Il meshing with a worm not illus
1. The combination in a Venetian blind in
trated on the shaft I2 of the pulley I3. The 55 cluding slat adjusting tapes and. an adjusting
2,405,153
3
4
mechanism housing, of an actuating shaft dis
posed longitudinally of the housing, spaced sup
porting brackets through which said shaft eX
tends and constituting supports therefor, a pin
ion on said shaft disposed between said brackets,
a cylindrieally curved bearing member having
tongues on its ends supportedly engaging said
brackets, said bearing member having a trans
round the pinion and having a transverse slot
through which the teeth of the pinion project,
and a cylindrically curved elongated rack rotat
ably mounted on said bearing member and pro
vided with a series of teeth coacting with the pin
ion, there being a slot at each end of the rack
teeth to provide for free rotation of the pinion
in one direction at each end of the rack without
verse slot therein through which the teeth of
imparting movement to the rack when either of
the pinion project, and a cylindrioally curved 10 said slots is in registry with said pinion.
elongated rack member rotatably mounted on said
bearing member between said brackets and hav
ing a series of holes providing teeth correspond
ing in spacing to the teeth of the pinion to coact
therewith, there being a slot at each end of the
rack teeth to provide for rotation of the pinion
in one direction without imparting rotative move
ment to the rack member when either of said
slots is in registry with said pinion, said rack
5. The combination in a Venetian blind in
cluding slat adjusting tapes, of an adjusting
shaft provided with a pinion, a bearing, and a
tubular rack member rotatably mounted on said
bearing and having a series of holes providing
teeth coacting with the pinion, there being a slot
at each end of the rack teeth to provide for ro~
tion of the pinion in one direction at each end
of the rack without actuation of the parts when
member having longitudinal bars struck outward
either of said slots is in registry with said pin»
ly therefrom and constituting means for secur
ion.
ing the ends of the tapes to said rack member.
6. The combinati-on in a Venetian blind in~
cluding slat adjusting tapes, of an actuating
cluding slat adjusting tapes and an adjusting
Shaft, spaced supporting brackets, a pinion on said
mechanism housing, of an actuating shaft dis
shaft disposed between Said brackets, a bearing
posed longitudinally of the housing, spaced sup
member carried by said brackets, and a curved
porting brackets through which Said shaft ex
rack member rotatably mounted on said bear
tends and constituting supports therefor, a pin»
ing member between said brackets and having
ion on said shaft disposed between said brackets,
teeth corresponding in spacing to the teeth of
acylindrically curved bearing member mounted 30 the pinion to coact therewith, there being an
on said brackets, said bearing manber having a
opening at each end oi the rack teeth to provide
transverse slot therein through lwhich the teeth
for rotation of the pinion in one direction with
of the pinion project, and a cylindrically curved
out imparting rotative movement to the rack
elongated rack member rotatably mounted on
member` when either of said openings is in reg
said bearing member between said brackets and
istry with said pinion, said rack member having
having a series of holes providing teeth coacting
longitudinal bars struck outwardly therefrom
with the pinion, there being a slot at each end
and constituting means for securing the ends ol
of the rack teeth to provide for rotation of the
the tapes to said rack member.
pinion in one direction without imparting rota
7. The combination in a 'Venetian blind in
tive movement to the rack member when either
cluding slat adjusting tapes, of an actuating
of said slots is in registry with said pinion.
shaft, spaced supporting brackets, a pinion on
3. The combination in a Venetian blind in~
said shaft disposed between said brackets, a bear
cluding slat adjusting tapes, of an adjusting shaft
ing member carried by said brackets, and a
provided with a pinion, supporting means for
curved rack member rotatably mounted on 'said
said shaft, a cylindrically curved bearing mem- ‘H bearing member between said brackets and hav
er mounted on said supporting means to surn
ing teeth corresponding in number to the teeth
round the pinion and having a transverse slot
of the pinion to coact therewith, there being an
through which the teeth of the pinion project,
opening at each end of the rack teeth to provide
and a cylindrically curved elongated rack rotat~
fer rotation of the pinion in one direction with
ably mounted on said bearing member and pre
out imparting rotative movement to the rack
vided with a series of teeth coacting with the
member when either of said openings is in reg
pinion, there being a slot at each end of the rack
istry with said pinion.
teeth to provide for free rotation of the pinion
2. The combination
a Venetian blind in
8. The combination in a Venetian blind in
in one direction at each end of the rack with
out imparting movement to the rack when either .e cluding lslat adjusting tapes, of an actuating
shaft, a pinion on said shaft, a bearing member,
of said slots is in registry with said pinion, said
and a curved rack rotatably mounted on said
rack member being formed of Sheet metal and
having tape attaching members integral there~
with.
Il. The combination in a Venetian blind in
cluding slat adjusting tapes, of an adjusting shaft
provided with a pinion, supporting means for
lsaid shaft, a cylindrically curved bearing mem
ber mounted on said supporting means to sur
bearing member to coact with said pinion, there
being an opening at each end of the rack teeth
to provide for rotation of the pinion in one di
rection without imparting rotative movement to
the rack member when either of said openings is
in registry with said pinion.
GUY W. KIRSCH.
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