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Патент USA US2084733

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June 22, 1937.
w/T. KAHLIFF
2,084,733
GARAGE DOOR OPENER
Filed March 5, 1936
2 Sheets-Sheet l
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June 22, 1937.
w. T. KAHLIFF
2,084,733
GARAGE DOOR OPENER
Filed March 5, 1956
2 Sheets-Sheet 2
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Patented June 22, 1937
2,084,733
UNITED 'STATES PATENT oFFlc'E
amas:
Gannon noon. orma
mmm r. xmlfr, Elyria. ohio
am nach 5. 193s, serai No. sus:
1 Claim. (Cl. 268-59)
This invention aims to provide a novel means
for opening and closing the door of a building,
such as a garage.
The invention aims to pro
vide a carriage of novel form. Opel'ßtively con
5 nected with the door or doors of the garage, and
to supply novel means for actuating the car
riage at the will of an operator.
It is within the province of the disclosure to
improve generally and to enhance the utility of
10 devices of that type to which the invention ap
pertains. -
With the above and other objects in view,
which will appear as the description proceeds,
the invention resides in the combination and ar
1.; rangement of parts and in the details of con
struction hereinafter described l,and claimed, it
being understood that changes in the precise
embodiment of the invention herein disclosed,
may be made within the scope of what is
20` claimed, without departing from the spirit of the
invention.
In the accompanying drawings:
Fig. 1 shows, in top plan. a device constructed
in accordance with the invention, parts being in
25 section;
section;
Fig. 3 is a section on the line 3-3 of Fig. 1;
Fig. 4 is a section on the lineA 4--4 of Fig. 1;
Fig. 5 is a perspective view showing the an
chor piece;
Fig. 6 is an elevation of the motor, parts of
' the brake being in section;
' .
Fig. 'I is a diagrammatic view illustrating the
35 circuit;
Fig. 8 is an elevation showing a modiñcation
wherein a torque clutch is employed;
Fig. 9 is an elevation showing how the device
may be applied to ‘a horizontally swinging door.
40 rather than to the vertically and horizontally
slidable door of Fig. 2;
Fig. 10 is a cross section on'the line iI-Il of
Fig. 9.
garage I, above the doorway 2.
A carriage II is mounted to move along the
track 9 and has fixed upper axles I2 on which
are journaled rollers I4 adapted to ride on the
upper edges of the track 9, the rollers having
flanges I5 that engage the outer lateral surfaces
of the track 9. Spacing'sleeves I8 are mounted 10
on one of the axles I2, between the correspond
ing rollers I4. The carriage II carries a lower
axle I1, on which are journaled rollers I8 en
gaging the bottom of the track 9, the rollers I8
having flanges I8’ that engage the outer lateral 15
surfaces of the track 9.
The numeral 20 designates a two-part ap
proximately L-shaped connection having at its
upper end a fork i9 pivoted on the axle I1, be
tween the rollers I8. The lower, forward end of 20
the connection 28 is pivotally joined at 2| to the
do'or 4. On one side of the carriage II there is
a lateral projection 22 having sloping end sur
faces.
.
y
The projection 22 on the carriage
'
Fig. 2 is a side elevation wherein parts are in
30
which may be an inverted channel, is secured
at its inner end to the standard 8 and is se
cured at its outer end by a bracket I0 to the
'
. The numeral I marks a building, such as a
45 garage, `having a doorway 2. The garage I is
provided with inverted- L-shaped guides 3 (Fig.
2). A door 4 for the doorway 2 is provided and
has rollers 8 or other pmjections which move in
the guides 3, the construction being such that
50 the door 4 can be raised and slid horizontally
into the dash line position of Fig. 2, in a well
kknown manner.
A platform 8 is supported at 1 in the garage I,
in spaced relation to the doorwayv2, a standard
55 8 being mounted on the platform. A track 9,
Il
is
adapted to engage a forward crank arm 23 or
a rear crank arm 24 on a shaft 28, the crank
arms 23 and 24 being adjustably secured at 29 to
the shaft 28. The shaft 26 is journaled in bear
ings 21 on the track 9.
30
On the inner end of the shaft 28 there is a
crank arm 28 pivoted to a link 28 that is pivoted
to the arm 30 of a switch 3i supported by a
bracket 32 on the standard 8. A pull spring 33 is
anchored at one end on one of the bearings 21
and is connected `to the link 29.
A fixed forward shaft 34 is mounted on the
track 9. The standard 8 has extensions 39 in
which is journaled a rear shaft 38. There are
sprocket wheels 31 which are carried by the shafts
34 and 38, one sprocket wheel being journaled on
the shaft 34, and the other sprocket wheel being
secured to the shaft 38 to rotate therewith. A
sprocket chain 39 is engaged with the sprocket
wheels 31. A channel-shaped anchor piece 38 is 45
secured to one run of the sprocket chain 39. The
anchor piece 38 carries a pivot element 48 on
which is mounted one end of a link 4I. The op
posite end of the link 4I is pivoted on one of the
axles I2 of the carriage II, between the spacing 50
`sleeves I8.
'I'he rear shaft 38 carries a worm wheel 42
meshing with a worm 43 on the shaft of an elec
tric motor 44 mounted on the platform 8. A wheel
4I on the shaft of the motor 44 is engaged by a 55
2
a,os4,7ss
-
_
_
v
«
„
brake shoe 46 having> an amature 41 responsive ~cuit 53 through the motor 44 is energized, and the
to a solenoid coil 4l on the platform 16. When motor continues to operate, to can-y the carriage
one solenoid con u is energized, the brake shoe 4s ' || to the right in Fig. '1.
is retracted from the wheel 45 on the shaft of the
When the carriage || has proceeded far enough `
motor 44. A compression spring 49 within the coil . to the right in Fig. 7 to open the door into the
' 4l engages the amature 41 and serves to main
dash line position of Fig. 2, the projection 22 on
tain the brake shoe 46 engaged with'th‘e wheel the-` carriage engagesthe crank arm/24 on the
45 cn the shaft of the motor 44.
shaft 26 andÍ rocks the shaft, the second motor
The motor 44 is interposed in a normally open . circuit 53 being opened by the switch 3|, and the
ilrst motor circuit 59, in which is interposed a
normally open switch 5|, located at' any con
venient place outside the garage |, a normally
.open switch 52 being interposed in the first motor
circuit 59, and being located at any convenient
15 Place'within the garage I. The switches 5| and
52 are under the control of an operator. The
motor 44 also is interposed in a normally open
second motor circuit 53, including a portion of
the _first motor circuit 5|). 'I'he second motor cir
'20 cuit 53 is adapted to be closed by the switch 3|
that. in its turn, is under the control oi': the car
door stopping in the opened position shown in 10
dash line in Fig. 2. The flow of current through
the conductor 54 is stopped at this time, the coil
46 is deenergized, and the spring 49 of Fig. 6
applies the brake shoe 46 to the motor 44.
If the operator wishes, he can go outside of the 15
garage, operate the switch 5| again, and cause
the carriage || to move to the left, into the po
sition of Fig. 2. If the operator wishes, he can
stay within the garage | and operate the switch
52, the door being _closed again.
It is not necessary to use the structure in con
riage Il. 'I'he coil 46 of the motor brake is in- ' nection with the slidable door 4 of Fig. 2. In
terposed in a conductor 54, connected to the
ñrst motor circuit 59 on opposite sides of the
25. motor 44. All of the various circuits and con
ductors may be suitably housed, as shown at 55 in
so
Fig. 2.
Considering, first, the mechanical means for
opening and closing the door 4, suppose that the
door 'is in the closed position of Fig. 1. The
motor 44 operates the worm 43, the worm 43 ro
tates the worm wheel 42, the shaft 36 is rotated
and motion is transmitted vto the sprocket chain
39 by the sprocket wheel 31 on the shaft 36. 'I'he
35
sprocket chain 39 -carries the _anchor piece 38
backwardly, the link 4| draws the carriage ||
backwardly along the track 9, and the connection
_29 raises the door 4 and slides it backwardly
to open position on the guides 3.
40
The motor 44 is not reversed, but continues to
rotate in one direction. 'I'he anchor piece 38
on the sprocket chain 39 is carried around onto
the run of the sprocket “chain 39 that is shown
uppermost in Fig. 1'.'vvv The carriage || moves to
20
Figs. 9 and 10, parts hereinbefore described have
been designated by numerals previously used,
with the suffix “a”. In this form-of the inven
tion, the door 4a is hinged 'at 56 to the building
la. Longitudinally adjustable links 51 are piv
oted at 58 to the' lower portions of the carriage
||a. The forward ends of the links 51 are piv
oted at 59 to the doors 4a. 'I‘he construction, ob
viously, is such that horizontally swinging doors,
30
or one horizontally swinging door, can be' oper
ated, as well as the vertically slidable door 4 of
Fig. 2.
In Fig. 8,»parts hereinbefore described have
been designated by numerals previously used,
with the suilix “b”. The modification here shown
provides a clutch engagement between the rear
shaft 36h and the corresponding worm wheel
42h. The worm wheel 42h has a. hub 60 in which 40
the shaft 36h may rotate, if too great a strain is
thrown on any part of the mechanism. The
worm wheel 42h, however, is coupled to the shafi
36h in the normal operation of the machine by
the left in Fig. 1, back into’the position of Fig. 2, a mechanism including a collar 6| secured at 62
45
andthe connection” closes the door 4.
to the shaft 36h. 'I'he collar 6| has an upward
Passing to the control features, when the door -ly extended arm 63, against which abuts one end
is in the closed position of Fig. 2 the switch 3| of a resilient friction band _64 extended around
'is held open, because the crank arm 23 on the the hub 6|! of the worm wheel 42h. A bolt 65 or
50 shaft 26 rests against the projection 22 on the the like extends through ~the said end of the
50
carriage ||. Switches 5| and 52, under the con
band, and through the arm 63 on the collar 6|.
trol of an operator, also are open. -'I'he solenoid The opposite end of the. band 64 is slidable on the
coil 46 is not energized, and the spring 49 thrusts bolt 65. A nut 66 is mounted on the bolt 65. A
the brake shoe 46 against the wheel 45 on the compression spring 61 surrounds a portion of the
shaft of the motor 44.
.
bolt 65, one end of the compression spring abut
Assuming that the operator is outside the ting against the nut 66, and the opposite end of 55
garage I, he operates the switch 5| of Figs. 2 and the compression spring abutting against the ad
'Lto close the ilrst motor circuit 50. vThe motor jacent end of the band 64, and tending to tighten
44- thus is energized and put into operation. At the band around the hub 66 of the worm wheel
the same time, current ilows through `the con
4'2b, the worm wheel thus being`coupled to the
ducto?ï54, and the solenoid coil 49 moves the ' shaft 36h, in the ordinary operation of the de 60
brake shoe 46 out of engagement with the wheel vice, but it being possible for the worm wheel
45 on the shaft of the motor 44. ’I'he carriage 42h and the shaft 36h to have relative rotation
|| is moved to the right from the position of
Fig. '1, the operator keeping the switch 5| closed if too great a strain is thrown on some part of
until the projection 22 on the carriage || is clear the mechanism, for instance, if something hap 65
pens to be below the Adoor 4, as the door 4 de
of the crank arm 23 on the shaft 26. Then the scends, or between the doors 4a of Fig. 9, as those
switch 5| may be released by the operator. The doors
are closed.
’
spring 33 rotates the shaft 26, and the arm 24
_ What is claimed is:
»
70 on the shaft 26 is swung inwardly toward the
A device for opening and closing a door, com 70
track 9, so as to be in the path of the projection prising a track in the form of a channel having
22 on the carriage ||. When `the shaft 216 is ro
upstanding flanges, a carriage having wheels
tated by the action of the'spring 33, the switch » mounted to move along the upper edges of the
3|;»is‘ closed by the action of -the arm 29, the ilanges of the track, means for connecting the
u link 29, and‘the arm 39 of Fig. 4. The second cir carriage to the door which is to be opened and 75
3
2,084,788
closed, an endless sprocket chain extended
lengthwise of the bottom of the track and housed
between the ñanges, means for connecting'one
of the carriage, yieldable means for rocking the
second shaft in one direction to dispose the arms
in such postion that they will be in the path of the
run of the sprocket chain to the carriage, means
for mounting the sprocket chain, including a. ñrst
shaft supported for rotation, a one-way motor,
a driving connection between the motor and the
cam projection, the cam projection then engaging
the arms, one at a time, and rocking the second
shaft in an opposite direction, means under the
first shaft, a second shaft supported on one of
the ñanges of the track, externally of the track,
10 for rocking movement and extended lengthwise
control of an operator for starting the motor, and
mechanism for stopping the motor when the sec
ond shaft is rocked in said opposite direction by
engagement between the cam projection and 10 .
of the track, upstanding arms on the secondv either arm.
shaft, an outstanding cam projection on one side
~
WILLIAM T. KAHLIFF.
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