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Патент USA US2412910

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Dec. 17, .1946.
A. v. ROWE
Filed Oct. ll, 1945
3y Sheets-Sheet l
Dec. 17, 1_946.
A. v. ROWE
Filed Oct. ll, 1945
5 Sheets-Sheet 2
Dec. 17, 1946.
A, v, ROW.;
Filed Oct. 1l, 1945
50 ¿IE if@ Zea' 7E 65
»'5 Sheets-Sheet 5
I,l l ’l
Patented Dec. l?, 1946
Alvin V. Rowe, Galesburg, Ill., assignor to Rowe
Manufacturing Company, Galesburg, Ill., a cor- Y
poration of Illinois
Application October 11, 1945, Serial No. 621,781
6~Claims. (Cl. 160-201)
This invention relates generally to an overhead
door construction and more particularly to over
head door constructions wherein a switch mecha
nism is employed in association with the horizon
tal portions of the guide track structure.
amount of headroom necessary for efficient oper
ation; in fact the invention makes it possible to
install an overhead door construction in instances
where the available headroom is not more tha
two inches.
One of the problems which confronts the man
The foregoing and other objects and advan
ufacturer of overhead door structures is that of
tages will be` more apparent from the following
producing a door which may be shifted between
detailed description‘when considered in connec
closed vertical position and open overhead posi
tion with the accompanying drawings wherein:
ltion with a minimum amount` of available head 10
Fig, 1 is a fragmentary elevational View of the
room. The present invention concerns itself with
inner side of the door when the hingedly con
the solution of the aforesaid problem and to this
nected sectionsthereof occupy their vertical door
end contemplates in combination with conven
closing position;
tional guide track structures a switch mechanism
Fig. 2 is an enlarged fragmentary vertical sec
of extremely simple and practical design adapted 15 tional view taken substantially along the line
tov selectively control communication ‘of the hon'
2--2 of Fig. 1 to more clearly illustrate the rela
zontal track portion with the usual curved por
tive positions of the door follower members, or
tion and a further portion extending forwardly
rollers, and the shiftable elements of the switch
from the horizontal portion.
More specifically the invention contemplates in
Fig. 3 is an enlarged fragmentary vertical sec
combination with hingedly connected door sec»
tional view taken substantially along the line 3-3
tions shiftable between vertical and horizontal
of Fig. l disclosing the opposite side of the switch
positions of a switch mechanism having a novel
mechanism and track portions associated there
control arrangement to facilitate the shifting of a,
movable switch member. `In this connection it 25 Figs. 4-6 inclusive, are enlarged views of the
is contemplated to employ a trip, or latching de..
switch mechanism and associated track portions
vice, which is operable as an incident to the shift
as illustrated in Fig. 2, Fig. 4 disclosing the up
ing ofthe door sections whereby to cause posi
permost door section as it is passing from the
tive and instantaneous shifting . of a movable
curved track section to the horizontal section but
switch member.
30 prior to the opening of the shiftable switch mem
It. is a further object of the present invention
ber, Fig. 5 being a View similar to Fig. 4 showing
4to provide a device as set forth above, wherein the
the door section in a further advanced position
movable parts of the switch mechanism and the
with the latch opening mechanism carried by the
latching means forming a part thereof are pivot
upper door section about to move past the trigger
ally mounted in such a manner as to insure free 35 plate, and Fig. 6 illustrating the latch actuating
dom of` movement at all times, and to accomplish ' abutment as it moves downwardly into engage
this, substantially frictionless pivotal bearings
ment with the trigger plate so as to release the
are contemplated.
latch member and thereby permit the automatic
It is also an object of the present invention to
shifting of the switch member toits lower posi
provide in combination with the shiftable 40 tion;
hingedly connected door sections and trackstruc
Fig-7 is an horizontal sectional view taken sub
turcs, as set forth above,a switch device or mech
stantially along the line 'l--T of Fig. 4;
anism which, as the door sections move from
Fig. 8 is a vertical sectional view taken sub-`
theirhorizontal to their vertical position, may be
stantially along the Vline 8-8 of Fig. 4;
automatically unlatched by a trigger device so 45 Fig. 9 is a perspective view of the trigger plate
as 'to instantaneously and positively establish
detached from the track structure; and
communication between the horizontal track por
Fig. 10 is a perspective View of the shiftable
tion and a forwardly extending track portionand
switch member which serves in its downward po
thereby permit the uppermost follower members,
sition to guide the uppermost rollers to and from
or rollers, on the door to move forward. As the 50 the horizontal track section.
door sections shift upwardly from their vertical
closed ‘position the uppermost guide rollers move
rearwardly along the portion of the track extend
ing forwardly from the horizontal portion and
Referring now to the drawings `more in detail
wherein like numerals> have been employed to
designate similar parts` throughout the ,variousv
figures, it will be seen that the invention con
this arrangement reduces to a Vminimum » the 55 templates an overhead door construction which
includes a plurality of hingedly connected door
sections I2, I4, I5 and i8y of Fig. 1. The door
member, or arm, 45 is always assured. Any tend
ency for rust or other foreign matter to collect
within the pivotal area of the knife edge 42 is
freevto fall downwardly away from said knife‘
section I2 will be hereinafter referred to as the
uppermost door section and the door section IS
as the lowermost door section. 'These sections
are connected by suitable hinges 25, and in the
vicinity of each of these hinges 20 is a track
edge. A pin 59 traverses the U-shaped portion
of the strip 43 so as to prevent upward disengage
ment of the switch arm from the. pivotal knife
edgetZ. It will be noted that theswitch arm
40 is urged toward its lower position by a coil
spring 52 which extends between a hook 54 on
follower member, or-roller, 22. >The guide rollers
22 will hereinafter be referred to as' intermedi
ate guide rollers, or follower members, to distin
the strip 4B and a tab 55 bent laterally of a
guish from an upper roller 24 associated with
mounting plate 58. This mounting plate 58 serves
each upper corner of the uppermost door section ,
as the means for coupling the track portions 36,
I2 and lower guide rollers 26 associated with the
the upper zpart of the curved track portion 30
land the'forward part of the horizontal track por
lower corners of the lowermost door sectionIS. '
cupy their vertical door closing position as shown
tion 32 as a unit. '
in Figs. 1 and 2, the intermediate guide V.rollers ~
VAs the door sections continue to move ltoward
their open overhead position the upper guide roll
22 and the lower guide rollers 25 are positioned
within a vertical portionît of guide track struc
ers M move rearwardly within the horizontal
riedjby the upper door section I2 rest within the
outer’extremity of a forwardly extending or aux
iliary track portion 35 when the door sections oc
cupy ltheir Vertical door-closing position. ‘ The
forward or outer extremity of the track portion
track portions 32 and eventually the intermedi
ate V.rollers ll’2rassc'1ciated’with the hinge `in Ithe
vicinity ofthe adjacent margins- of the door see
tion `'1I 2V and the door section lIl! move into-en
gagement with van L-s'haped portion 60 rofthe
strip 48. .Thisïcauses the switch element to ‘be
shifted upwardly to the position shown in Fig. 6.
As the switch element 40 reaches this position
a trip or latch mechanism,V about to be described,
is conditionedso as to prevent subsequent down
ward shifting- of the switch member until said
3S `is curvedv downwardly so that when the upper
most >section I2 reaches its ñnal _closing position
the movement of the door sections from open
tures. Each vertical track portion 23 communi
cates‘ with'a curved portion 30 which‘in turn is
adapted to communicate; or connect, with an
horizontal track portion 32 through theagen'cy
of a' switch mechanismV designated generally by
the numeral 34. The upper` guide rollers 24 car
latchmechanismis automatically shifted during
toward closed position.
Thelatch mechanism, just referred to, in
it will be sealed against a header 3S of the -build
ingstructure in which the-door ,construction is
cludesA a trip 'orîlatching plate 62 which is shown
indetail in,Fig.r9. The plate-52 is provided with
an arcuate slot l(it which accommodates a pin
installed. ¿A_n horizontalportion of lthe track 36
extends rearwardly from the al‘oove-r'nentionedl
curved portion and is adapted to communicate,
66. -This pin- provides a pivotal support for the
or connect, with the horizontal track portion 32
plate 52 as illustrated in Figs. 3 and 4. As the
by means of the aforesaid switch mechanism 34.
The structural and functional characteristics of 40 switch member ílill is shifted upwardly through
the'agency o‘f the rollers 22, as just described, an
the switch `»mechanism >Slt may best be under
arm 58 ïformed `integral with the switch mem
stood by describing the operation >of the door sec
ber` ‘fillïis urged upwardly against the underside
tions as they shift between their vertical door
çlosing position and the upper open or overhead
position. '.Assuming that 'the dool` Vsections oc
cupy'their> normal door-closing position, vas shown
in Figs. "l “and‘ 2, A‘and a force is applied soas to
urge the door sections upwardly, the upper roll
viewed inA Fig. 4, and a counterclockwise direc
tion, ‘as viewed in Fig. 3, about the pin '65 now
positioned Vin the upper extremity of the arcuate
slot £4. The upward movement of the arm 60
‘e'rs 24 willV move upwardly and rearwardly in the
_curved section ofthe Vtrack portion 36 ‘effecting
of arn- arm' `lil on the plate 62. This causes
the plate S2 to `pivot in a clockwise direction, as
su is _suiiicient to clear the arm ‘I0 and as this oc
curs the arm ‘I0 falls downwardly to the posi
the'îmmediate disengagement or unsealing of the
upper margin of lthe doorv section I2 from Ythe
headerßß. From the curved section of the track
portion t6 the rollers Zit movehorizontally within
tion 'illustrated in Fig. 6, thereby preventing
'downwardshifting of vthe switch member 40.
Pressure ofthe arm ‘58 against thearm "I0 of the
the horizontal section and ultimately reach :a '
platefca-uses _the outer extremity Aof the farm »10
shiftable member di) of the switch mechanism 34.
to -bea‘r against anjabutment 'I2 (Fig. r7) 4formed
integral with and extending laterally:v of the' track
coupling plate 58. with the switch-arm 4u 1in
A_-detailedrdisclosure of this shiftable switcher
track‘member, ¿iii will be‘found in Fig. 10. When
this position thel following yin'termediate rollers
the switch member 40 occupies the position shown
in Figs. 2 and 41„it serves to direct the upper 60 '2-2,ïfasf~well"`as the» lower rollers` §26, are directed
guide rollers'24 :between the auxiliary track por
from "the cur-ve’dv-f_trackl portionV v30 VVinto ’the‘ïhori
tion âßand‘the'ghorizontal -mainftrack portion
Zonta'l'track portion -32. ' ’ ‘
far "the, functioning of the switch mech,
32. vItwill "be vriotre'd'that the‘left extremity of
the shiftable‘switch’rnember 40'is pivotallym'ount- ed on ‘a-knife edge t2. A flange44 extends over
'a‘nis'm' ‘to ‘ enablefproper vmovement ‘of 'the 'guide
one side df3 the‘ïplate ‘45 upon which the knife
described. 'f-I't' will “now be assumed‘thatthegdoor
sections >_are tofbe'shiftedjfrom their, o_pen over;
head- position toward Vtheir closedk vertical ‘îp'osií
>edgefêZ’is formed, and a U-shaped portion of a
strip '@liis positioned on the opposite side ofthe
plate 45. ’(See Figi 4.)
Sufñcient playl is >pro
vided between thel fiange’il'd andl the U-shaped
rollefrsinto-‘the ’horizontal trackp'ortionjs 'has'fbeen
tion.l With the-shifta‘ble `switch member 4I) oc
cupying the `Yposition shown‘inFig. 6, _thelowßrf'
portion ‘Q8 so as to providea free pivotal- connec
most rollers 2:6. jand'thje intermediate urollers .Z2 '
tionand permit pivotal movement of the member I' vare directedffrom thefhorizontal .tlladklportion
4E! l'between'the- lower solid-'line position andthe
toftëhe'curved'track portion 3U._..1mme,diate
upper dotted-line positionas >illustrated in'Figf. 2j.
‘lr-Í'Oljlowinsthe _entrance ofthe uppermost 'intera
«ByÍ' lthisïarrangement» free pivoting of ` the "switch 75 rnediate'ro'llers 22 into the curved track portion
ÉU, an' abutment 14 carried by the uppermost
an r extended period of time, and to avoid as f_ar>
door section 'I2 is brought into engagement with
aspossible unnecessary noise in operation. The
a depending finger portion 'I6 of the plate 6'2, as
switch mechanism described herein is of extreme-->
clearl'y‘illustrated in Fig. 5. Engagement of the
ly practicalconstruction in that the number_of
abutment 12 with the finger 76 causes the plate Ul movingparts are few and -the mechanism may bei>
62 to be pivoted about the pin S6 and the plate
assembled or disassembled with a minimum>
is rotated in a clockwise direction as viewed in
amount of effort and skill. The _bearings which
Fig. 5. This causes the instantaneous shifting
provide the pivotal points are so constructed as to
of the arm, or ñnger, 'lil away from the under
positively preclude accumulation of rust or other
side of the arm 68 permitting the sudden down 10 foreign matter. In other words, once the mech
ward shifting of the switch member 40 to the
position illustrated in Fig. Ll.l Thus as the upper
anism is installed it need not be lubricated from
time to time in order to insure continuous satis
rollers 24 approach the switch mechanism, the
factory operation. This‘is extremely important
switch member 40 is positioned so as to direct
fora number of reasons. In the ñrst place the
said rollers lfrom the horizontal track portion 15 switch `mechanism israther inaccessible for the
32 into the forwardly extending or auxiliary
average garage owner, and secondly the average
track portion 36.
car operator does not wish to be burdened with
--Attention _is directed tothe movement of the
continuous upkeep of the overhead door mecha
plate 62 when the ñnger portion thereof is en
gaged by the abutment 'I4 as the door sections 20 , It will also be apparent from the foregoing de
shift upwardly from closed to open position. By
scription that the invention contemplates an>
the time the abutment 14 has moved upwardly
overhead door construction requiring minimum
into engagement with the finger '16, the shift
headroom for installation. As previously stated,
experience hasshownthat the door will operate
able switch member 4i! will have been shifted up
wardly and latched in position as previously de
satisfactorily when the available headroom is not`
in excess of two inches. Many of the present day
scribed. The engagement of the abutment or
projection 'M with the ñnger 16 causes the >plate
commercial overhead door installations require
considerable'more headroom in order to accom
66 to rotate in a counterclockwise direction, as
modate the upper edge, or margin, of the upper
viewed in Fig. 5, about the fulcrurn point estab
lished by the engagement of the arm or finger 30 most door section as itis shifted between the
curved track portion and the horizontal track
l'ß with the fixed abutment 72, as shown in Fig.
portion. The invention contemplates an over
7. The arcuate slot E4 in the plate permits this
head door construction in which the switch
limited, free movement of the plate S2. This free
means includes a shiftable switch member and a
tilting, or shifting, of the plate merely serves to
shiftable latch member for securing the switch
enable the abutment 14 to pass upwardly without
_member in one position, saidlatch means beingv
tripping the latch mechanism. In other words,
as the abutment 14 moves upwardly and engages
the ñnger '16 of the plate 62, said ñnger‘serves
controlled as an incident to the movement of the
door sections. That is to say, means is provided
which is operable upon movement of the door `for
as a paw] which permits passage of the abut
ment without disturbing the latched position of 40 shifting the latch member, or means, topermit
the shifting of the switch member.
the shiftable switch member dû. As the finger
While for purposes of disclosure certain spe
16 automatically moves 'downwardly after the
ciñc structural details have been disclosed here
passage of the abutment 14 it occupies a posi
in, it will be apparent that other modifications
tion in the path of said abutment during the
and changes may be made without departing
subsequent'closing‘ of the door sections. Dur
from the spirit and scope of the appended claims.
ing this closing movement the abutment 14 en
gages the finger 18 as previously described, there
1. An overhead door construction including a
by causing instantaneous unlatching of the switch
door comprising a plurality of hingedly connected
member. The downward shifting of the plate
door sections for traversing a door opening, track
62 is assured by employing a coiled spring 'I8
follower members disposed along opposite side
which is interposed between the plate `62 and
margins of the> said door sections and positioned
the track coupling plate member 58. It will be
intermediate and at the upperV and lower extrem
understood, however, that both the downward
shifting of the plate 62 and the downward shift- ,` ities of each side margin of the door, track struc
tures adjacent opposite side margins of the door
ing of the switch member 40 takes placeun
’ der the action of gravity, the coil springs 52 and
for accommodating said follower members in
‘I8 being used in instances where it is deemed
directing the door sections between vertical door
closing position and open overhead position, each
essential to assure instantaneous action. It will
also be noted that the point of fulcrum between
track structure including an horizontal portion, a
the finger, or arm, 'l0 and the abutment 'I2 pro
substantially vertical portion, and an intermedi
vides a bearing which is free from the accumula
ate curved portion for accommodating said inter
tion of rust, foreign matter and the like. By
mediate track followers, a further track portion
having this point of contact any accumulation
extending forwardly from each of said horizontal
of rust or dirt tends to fall downwardly, away
track portions for accommodating the follower
from the point of fulcrum and hence free piv
member adjacent the upper extremity of the side
oting of the plate E2 about this point is assured
margin, switch means for selectively connecting
at all times.
said horizontal track portion with said curved
From the foregoing it will be apparent that the
track portion and with the said further track por
present invention contemplates an overhead door
tion, said switch means including a shiftable
construction of improved, practical design. An
switch member, shiftable latch means for secur
other difiicult problem which confronts manufac
ing said switch member in one position, and
turers of overhead doors is that of reducing to a
means operable upon movement of the door for
minimum the number of automatically shiftable
shifting said latch means to release said switch
parts in order to assure efficient operation over 75 member. ‘
' a. ¿n overhead door ccnstruenon including a
door' comprising a- plu-i‘a-lity' of hingedly co'nr-ii‘cted‘`
door sections for 'travertir-'1gll a door open-ing, track
follower ‘niembers"A dispo"" along opposite' side
tablishes communication between the horizontal’
track portion and said further track portion, re
leasable abutment means» for preventing move- -
margins 'of the said doors ations and positionedY
ment of said switch member' toward said lasty
mentioned position, and means operable as an:
ediate the upper and lower extremities of
incident to the movement of said door for Shiite
eac ~ »side margin of the‘doór,~ a' track follower ad
ing said abutment to release said switch member.
íacëiitthe upper extremity of each side margin
ofthe door, Vtrack~ structiires" adjacent opposite
side Ariiargins of the'door for accommodating! said
follower- -inembers in directing the door? Sections
4; An' overhead door- construction as' set forth
in claim l whereinthe latch means includes a
between vertical door-closing position and open
position, eacl‘il track structure including
substantially vertical
intermediate curved portion for 115
minodatin'g >said intermedi'a-te'track follow'
e i a i’u‘rïtlierr track portion extending forwardly
pivotally supported member, the pivotal support
for which includes an upper bearing surface of
restricted cross=section having an open area im;
mediately therebeneath for passage of rust par
ticles' and the like from the contacting surfaces of
the‘bearing structure.-
5; An overhead door construction as set fort ‘
in claim 1 wherein the latch means includes a
member having two pivotal points, one for piv
frein eachv of said horizontal track portions for
otally supporting the member as it is shifted in>
accommodating the follower member adjacent
the üpp'er extremity of the side margin, switch 20 one direction and the other pivotal support for
said member when it is shifted in the opposite
means for' selectively connecting" said horizontal
track portion with said curved track- portion and
6. An overhead door construction including a
with the ‘said further track portion, said switch
door comprising a plurality of hingedly connected
rii'eans’v including ashi-ftable switch member, a
door sections for traversing a door opening, track
sl'ii'ft'able abutment for retaining the Switch mem
berZ in one shifted position, and means operable
in‘ response to the movement of the door for shift
followerY members disposed along opposite side
margins of the said door sections and positioned
intermediate the upper and lower extremities of
ing said abutment to release th'e switch member.
each side margin of the door, a track follower ad
3; An overhead door construction including a
door comprising a plurality of hingedly connected 30 jacent the upper extremity of each side margin
of the door, track structures adjacent opposite
door sections for traversing a door opening, track
side margins of the door for accommodating said
follower members disposed along opposite side
follower members in directing the door sections
margins of the said door sections and positioned
between vertical door closing position and open
intermediate the upper' and lower extremities of
overhead position, each track structure including
each side margin of the door, a track follower
a horizontal portion, ,a substantially vertical por
adjacent the upper extremity of each side mar
tion, and an intermediate curved portion for ac
gin of the door, track structures adjacent oppo
commodating said intermediate track followers, a
site side margins ofthe door for accommodating
further track portion extending forwardly from
saidfo‘llower members in directing tlfïie> door sec
tionsv between vertical door c'losingp'osition and 40 each of said horizontal track portions for ac
commodating the follower member adjacent the
open overhead position, `each track structure in
upper extremity of the side margin, switch means
cluding' a horizontal portion, a substantially ver
for' selectively connecting said horizontal track
tical portion, and an intermediate curved portion
portion' with said curved track portion and with
,for accommodating. said intermediate track f_ol
the said further track portion, said switch means
lowers, a further track portion extending for
including. a shiftable switch member, shiftable
wardl'y fromv> each of said' horizontal track'y por-V
latch means for securing' said switch member in
'tions for accommodating the follower member ad- i
one position, a pivotal support for said shiftable
_jacent the upper extremity of the side margin,
switch member including an upper bearing sur
Switch means for selectively connecting said hori
zontal track portion with said curved track por 50 face area of restricted size andan open area
therebeneath for passage of rust particles and
tion and with the said further track portion, said
switch means including a shiftable'switch mem
ber normally urged toward a position which es;
the like from said bearing'surface. ~
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