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Патент USA US2411882

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Dec‘ 3' 1946' -
LEI ROY HJKIESILING,
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ELEVATOR
. > "
SYSTEM‘
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_Fi1ed-N6ir.'10. 1942.
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2,411,332
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INVENTOR:
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By L'YH"
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ATTORNEYS
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Dec. 3, 1946.
LE ROY H. IKIESLIQNG
‘ 2,411,882
ELEVATOR SYSTEM
Filed Nov. 10. 1942
2 Sheets-Sheet 2
44?"
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2,411,882
Patented Dec. 3, 1946
.
UNITED
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STATES
PATENT " OFFICE
"2,411,882;
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ELEVATOR SYSTEM
Application
. Le Roy
November
H. Kiesling,
10, 1942,.Serial
Brooklyn, N.No. 465,111
18 Claims. (01. ‘187-31)
.
This invention-is a novel elevator System, hav
ing reference particularly, to a construction of
gate-for closing each gateway-of theelevator, and
to an arrangement for the control of the powerv
drive of the elevator operated from a gate,- and
to a cooperative combinationof such gate features
and control features.
v
The improvements hereof is adapted'to various
practical uses, for example on passenger or freight
elevators, or for dumbwaiters adapted to convey
goods from floorto floor, under electric drive and
push-button control. The elevator system may
,2
v
is collapsible upwardly for opening, and which
undergoes lateral distension during upward col
lapse, in; cooperation wit . a means or switch, to
controlthe power operation of the car, and Ya con
nection whereby. the lateraldistension of thegate
during openingv causes such control means to
render inoperative thepower-drive. The lateral
position of the gate is determinable, as by'spring
meanslocated'near'the lintel.
'
.
In a particular aspectlthe ‘invention may be
outlined as consisting ofa ‘power-driven elevator
system of the kind‘ wherein the car, or each car
in the hoistway, hasa collapsible gate closing its
comprise one or a plurality of cars, each car
gateway and wherein the control' means com
traveling between two or more ?oorsor stations
within a hoistway, meaning any type of trunk or 15 prises a movable contact arm or equivalent mem
ber mounted-at‘ a‘ ?xed position in the hoistway,
for example protruding from a switchbox, and
manner, with a single car in- theshaft, or on the
cooperating therewith a shiftable actuator orcam
other hand around an orbit, with a succession
mounted on the car and positioned-to render the
or train of cars moved step by step from station to
station according to the control, exercised at will. 20 power drive inoperative when the gate is open and
operative when the gate is shut, and such system
Typical instances are for. restaurant or. factory
being characterized by one or more of the follow
use to shift provisions or goods from floor to floor,
shaft; and the travel being eitherin a vertical
or for the elevating of supplies or munitions from
a lower to-an upper deck of a ship. In these vari
ous instances a gate is substantially essential in
'.OI‘d8l‘ to close the elevator gateway, at one or
each side of the car,.to con?ne safely andpre
vent falling out of goods therefrom.
‘ The general objects of the present invention are
ing features. Regarding the'collapsible' gate, this
is herein mounted at the top or lintel of the gate
way, thus providing self-closing downwardly of
the gate by gravitywhen released.‘ Such collapsi
ble gate is preferably‘ of the type, which may be
referred to as the lazy-tongs type, composedof
crossed links betweentransverse bars, each link
pairbeing centrally pivoted like a pair of scissors,
vand the, link ends tending therefore'to spread or
to afford, in an elevator or dumbwaiter system of
the kinds referred to, greater eiiiciency and con»,
"separate transversely with the longitudinal collapse
venience combined with safety. A further ob
of the gate during opening, and vice Versa, the .
ject is to provide a gate which is self-closing when
link ends sliding along the transverse barsinclud
released from the latch or other means employed
to hold open the gate when the car remains 35 ing the topmost or lintel bar as the bars rela
tively approach and separate inaction. With
stopped in the hoistway. Another object is to
‘such an elevator arrangement, a special feature
hereof is that the shiftable actuator which swings"
theelectric or. other drive, operable from the con
dition of the gate, whether openor c1osed,~and 4.0. the switch arm is shifted outwardly or inwardly"
which is sufficiently compact to be accommodated
on thecar by‘ a mechanical connection from one
easily within the limited space usually presented
. of the link ends, particularly a top end of a top‘
link, so that during the opening ‘orcollapsing of
in such installations. Further objects andad
vantages will be explained in the hereinafter fol
the gate such link end, spreading outwardly,,acts
lowingdescription of an illustrative embodiment
to thrust outwardly the actuator and thereby
of 'the invention or will be understood by those
actuate the contact arm and control switch and
prevent operation of car until .the gate has been
conversant with the subject. To the attainment
of such objects and advantages the present in
' again closed.
vention consists in the novel elevator system in
In the accompanying drawings,
.
. ~
cluding novel features. of operation. and control
Fig, l is a perspective view of an elevator. or
and features of collapsible. gate, as .well as novel
dumbwaiter car embodying the gate and control
features of combination, arrangement» and con
features of the present invention, with the gate
structionherein illustrated. or described.
shown initslowered, expanded or closed position.
provide a simple and reliable. control means for- ‘
In. its preferred embodiment the invention, in
‘a power-driven elevator system, comprises. acar
.iieaie which’ iehune twine gateway Knickers
,. :Fig, 2, on a larger scale, is a: rightelevation
as Part repeat-setterPage Semen-line- lie-.1 .
2,411,882 '
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4
of Fig. 1, showing the gate collapsed and open
ner or retired position to an outer or switch
throwing position, for example within the groove
and latched so.
Fig. 3 is a rear elevation view showing the co
or slideway provided between the facing chan
nel bars l8 of the lintel or gateway top piece IT.
For certain reasons that will appear in describing
the gate it is desirable that the actuator and its
operation of the control means on the car and
those in the shaft or hoistway, the wall of which
appears in Fig. 3, the control switch box appear
ing in Figs. 1 and 3.
Fig. 4, on the same scale with Fig. 2, is a front
elevation view partly, broken away and. partly
shown in vertical section view.
I
I _
carrier or shank be spring-pressed outwardly, and
for this purpose the shank or slider 23 is shown
10 provided With an inward reduced extension 24
‘
surrounded by a compressed helical spring 25,
arranged within the guiding lintel and taking its
Fig. 5, in perspective, and partly broken away,
shows details of the collapsing gate bars and the
seat upon the shank 23 and upon a central abut
latch means to hold open the gate.
ment or seat 21 which is preferably ?xed. For
Fig. 6 is a front elevation View, centrally broken
away, showing particularly the construction of 15 purposes of symmetry, and for centralizing the
collapsible gate, there is provided, at the other
certain parts at the lower end of the car.
or righthand side of the abutment 21, a second
compression ‘spring 28 bearing upon a slider or
Fig. 7 is a left elevation and part section taken
on the section line 'l—'! of Fig. 6.
shank. 29. The symmetrically opposite sliders 23
Referring in detail to the structure shown in
the drawings, the hoistway or shaft wall 9 is not 20 ‘and 29 are provided with depending ears or lugs
51% and 53, for the pivoted connection thereto of
shown except partially by indication thereof in
the topmost gate links, as will be further de
‘Fig. 3. The car Ill is shown .in the form of a con
scribed.
_
ventional dumbwaiter, but the illustration omits
Coming
now
to
the collapsible gate 3i, this is
any showing of the hoisting meansor cables or
the power operating means or motors or the push 25 shown as hung from the lintel I? so that its col
lapsing is upward, to open the gate, while when
buttons or similar manual controlling means at
released it expands downwardly to close the gate.
This is in distinction to the conventional arrange‘
ment of collapsible gates the longitudinal move
merits of which are horizontal, and which tend to
the respective floors or stations of the system.
The car It‘! may be described as comprising a ceil
ing or top wall H and a ?oor or bottom wall l2,
near the edge of which is provided a cylindrical -
remain in any position in which they are re
roll l3 to assist loading heavy goods; and right
'and left side walls 14, the car being shown open
leased.
at both front and back sides, providing two gate
tudinal movements of, the gate are vertical, and
being based upon the top piece of the gateway
the strong expanding action of gravity affords
reliably the self-closing action of the gate. The
gate is shown collapsed or open in Figs. v2 and 4,
ways, the front one of which is shown as closable
‘by a collapsible gate, while the other
gateway ’
'
might' be similarly or otherwise closed. '
Describing further the car construction, it is
where it is seen to be latched and held by a de
vice 38 to be described. In this position the ac
shown as having four‘ corner uprights l6, and
‘across the top front a lintel or ?xed beam l7.
These structural members and the walls maybe
tuator 22 is held thrust outwardly and the power
‘thus rendered inoperative while the car remains
suitably interconnected, as by Welding. The cor
stopped and the gate open. Power operation can
,ner uprights I 6, especially at the two sides of the
‘front gateway, are shown in'the form of ‘channel
‘bars placed in facing opposition, so as to consti- _
3tute upright
tracks for the gate opening - and‘
.closing movements. Also the lintel I‘! may be
hollow, constituting a barrel or guide for interior
With the present invention the longi
‘
not be applied except after releasing and closing
of the gate, which is readily effected by retracting
theholding latch, the gravity self action there
upon reliably insuring the complete descent and
closing of the gate; thus insuring safety against
accidental or premature travel of the car.
parts; for example, thelintel being shown com
The collapsible gate, shown of the preferable
posed of a- pair of channels l8 facing each otherv
andsecured or welded ‘at the tops of the corner 50 :lazy-tongs type, may be described in detail as
follows; It comprises a series of transverse or
,upr'ightsdli. -_ ‘:Qther conventional details of ele
horizontal. bars 32 and 33, which are guided in
lv_a_.torv_ca_r construction will be ,understood, with
their up and down movements by the?xedchan
out further reference.
nels l6, and‘ which themselves forniguides for
- Referring next, to the operatingcontrol means
there is shown at a ?xed position in the hoist- ‘ the ends of thescissorepivoted links 68. The top
cross piece or lintel I 7 may be considered the ?xed
way, a control memberin the form of a movable
arm 20 which for example may be mounted
'swin'g'ingly upon an electric switch box 2| mount
ed on or in the hoistway wall and containing the
switch devices and circuit connections necessary
top bar of the gate, and between this and the
bottom bar 33 may be any number of other bars
32, of which four are shown, according to the
desired height of car; and upon the bottom bar
for operation, usually through relays, of the main
or power switches by which the electric drive of
the car is effected.
Cooperating with the arm 20, which is repre
sentative of any switch control member, is shown,
manually brought about.
Like the ?xed top gate bar, guide or lintel l1,
mounted on the car, an actuator or retiring cam
22, this being shiftable, and with the arm 20 pro
viding mechanical contacting means whereby the
_ gatemovements on the car
are communicated to .
.the ‘controlling switch on the hoistway wall. Cam
‘ 22 acts as a shoe to thrust the arm.
While the‘ shiftable mounting of the actuator
33 is provided a convenient handle 34 by which
the lifting or gate-opening movements may be
each of the transverse bars 32 and 33 is shown
consisting of a pair of mutually facing channels
35, thus providing guides or slideways for the
ends of the crossed links. The spacing of the two
channels for this purpose may readily be effected
by the clamping of spacer blocks 33 between the
channels at suitable points, for example near the
ends'and at the middle, one such block being
“shown in‘Figs. .4 and__5 near ‘ the _ left end . of .the
"bottom transverse gate bar 33. - At‘ this point may
bar or'plunger and arranged‘ to slide from an in 75 conveniently'be described the releasable latch
- or cam'22maybe varied, it is shown as mounted
on a carrier shank 23, shown in the, form of a
means'to hold‘ in'its'raised or upper position the
2,411,882‘
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collapsible gate. For. the purpose of'such latche.
ing one of'the spacing blocks 36 of the transverse
bar 33 .may be provided with a, short downward
extension towhich is attached a ‘horizontal, ex
tension or .1l1g.3'|, projecting for example rear
wardly, as'seen in Figs. 4 and 5. Cooperating with
in Fig; 2 wherein each pivot‘ pin 50engages at its
‘ central‘portion the ‘ends of the two meeting links
48; while, forxsm'ooth running qualities each such
pivot. .pincarries at its respective‘ endsvsmall roll
ers 51, which may be fast orloose upon the pin,
and which are con?nedwithin the opposite chan
nels 35 of the-transverse guide bar 32. Thus dur
this is a swingable latch 38, seen also in-Figs. l
ing the openingand closing movements of the col- '.
and 2, of the duckbill type, se'pivoted thatits own
lapsible gate, all of the movements of its con
weight tends to swing it into the latching posi
stituent parts, the transverse bars and the crossed
10
tionv shown in Figs. 2 and 5. To apply the latch
links, are under groove and roller guidance. As
the gate is lifted by its handle 34. somewhat be
regardsthe connection between the lowest pair
yond its open position shown in Fig’. 2', namely,
ofv links. and the bottom bar 33, the fact that
to a tightly collapsed position as shown in Fig. 4,‘
there. is only one link'end at'each sliding pivot
permitting the latch to swing in below the. lug
can be compensated by applying, upon the'pivot
31, so that whenthe gate. is‘let slightlydow-n the 15 30. a small dummy piece or spacer, representing
parts will take the position shown in Figs. 2 and
the absent link, and conveniently consisting of
5, the weight of the gate holding the tail of‘the
a washer or roller 52, as indicated in‘Fig. 2.
latch pressed against a ?xed stop 39. To unlatoh
The top ends of the topmost link pair of the
and release the gate for. closing it is only neces
gatedo not‘ move freely, as do those running in
sary to lift slightly-the handle. 34, permitting the 20 thebars
32 or 33 therebelow, but are symmetri
manual swinging away of the latch so. that, upon .
cally constrained in their approaching and sepa
letting go of the handle the gate will descend for
rating .or spreading movements by the symmetri
cibly by its own gravity to the closed positionof
cal springs 25 and 28 that are con?ned between
. the sliders 23 and 29 within the hollow lintel.
The several transverse bars ll, 32 and. 33 of the
Thus the topmost left link pivot pin 53 is shown
car gate are caused always to remain parallel to
as pivoted, not to another link, but to a depend
each other, by the action‘ of the crossed links con
ing lug or-ear 540i the slider 23; while similarly
necting them, and for smooth action the ends of
the top right pivot pin 55 is pivoted to the de
these bars, Where they enter the upright channels
pending lug 56 of the slider 29,. Consequently, as
it are provided with guide rollers M, as-best ‘ the gate descendingly closes the pivots 53, 55 are
shown in Figs. 4, 6i and '7. Itis'frequently desire
drawn. horizontally toward each other, causing
able to stop the closing movement of the gate at
the sliders 231 and 29to compress the two springs;
a point with the bottom bar 33 slightly above the
and as these springs are preferably equal and are
car ?oor, as seen in Fig. l, and in such case. the
symmetrically centered by the abutment 21 the
bottom bar may be provided, at each end, with a
movement of approach of the two pivots, at the
drop extension or shoe 42, accommodated vand
top ends: oflthe topmost links, is a symmetrical
sliding within the groove of the guiding channel
action, the symmetry of which is carried down
16. Near the lower end of the shoe 42‘ is shown
throughout‘ the entire system of links from the
an additional guide roller 4!; so that; the. pair "of
top to the bottom of the gate.
,
guide rollers at each end of the bottom barserves
In the arrangement thus described an advan
Fig. l.
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to afford a steadying action and substantially pre
vent any tilting or inclining of the position of
this bar. The bottom bar 33, and the top bar or
lintel ll‘ thus. remaining horizontal, all'of the in
termediatebars 32 ef?ciently maintain also a hori_
zontal position whether or not the gate is in mo
tion. As an additional expedient of advantage‘
there is shown, below the lowest. position of the
gate, within each of the channels 55, a ?xed-block '
M, these two blocks being, secured to theirchane
nels and serving, as one purpose, to afford bear
ings for the cylindrical ?oor roll. l3. Asanother
tageous action occurs.
The springs may be un
der'slight compression when the gate is open, as
in Fig. 4, thus maintaining a tendency to move
outwardly the sliders 23 and 29 and to thrust out
wardly the actuator or shoe 22 toward the con
trol. arm 20 in the hoistway.‘ When the gate is
fully. closed the springs 25 and 28 go under fairly
high compression. They are selected however to
rovide, under these conditions, insuf?cient stress
to overcome the weight of the gate, wherefore the
gatemay- close itself by gravity, and when closed
will remain closed. The springs however are at
this time under considerable strain and therefore
bumpers 45, upstanding from the blocks and serv
when manual opening of the gate is performed
ing to receive the impact of the descending shoes . ‘
function, the blocks 44. carry rubber studs. or
42 when the, gate is closed.
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w
vthe springs, pressing apart the link ends sDread~
ingly, afford substantial assistance, relieving
The gate is composedv oi the describedtrans
greatly the manual work of lifting the gate to
verse bars, preferably horizontahand a, series of
open position. In a sense the springs give partial
links 48, arranged in pairs between bars, each
in easing the manual effort. As
pair of links being symmetrically crossed. and 6.0 counterbalance
the rising gate however acquires increasing mo
centrally pivoted to, each other We pin or rivet
mentum the springs become more and more re
49. Each of‘ the links which is inelinedidownr
laxed so that, due to this fact and to the change
wardly toward the right-in the closed gate. posi
of angle of the links, the force of the springs
tion of Fig. 1 is arranged in front of the oppo
becomes negligible. As the gate risesv to its full
sitely inclined link. This permits the two links
open
position self actuation will swing the latch
of the pair above any-given barto be coordi
38 under the gate lug 31. In this position the
nated with the link-pair below the bar, without
spreading of the topmost link ends. by thrusting
the need of bending or‘ deforming any link to‘
outwardly theslider 23 and. shoe 22 will have ren
accommodate them smoothly to each other and
dered inoperative the power drive, thiseondition
to thebars whether the gate be. open or closed.
continuing until unlatching and dropping of the
‘Thus the links of each pair are pivotally con
gate to closed position. During such gravity
nected to those of the next pair above and be
drop of the gate the springs. again function ad
low, namelyby end pivots 50, which‘are accom
mates inside of; the. channel groove or thein- ,
immediate-bar. .Thisconstructicn
best shown.
vantageously, since their resistance, toygat‘e
. descent.increaseserosressiveln thus; Preventing
2,411,882
7
excess momentum and retarding the closing
movement to a substantial extent, so that the
gate comes to its full closed position without any
undue shock or impact upon the bumpers 45.
The described spring mechanism is illustrative
of a suitable resilient means tending to spread
transversely the lazy-tongs side pivots or link
ends, and thus tend to lift the gate toward open
position, with preferably a symmetrical action.
8
inwardly, and said shank being connected to the
gate linkage, whereby the link-end spreading ac
tion moves outwardly and shank and actuator as
the gate opens; and wherein said sliding shank is
spring-pressed outwardly and is directly pivoted
to a link end.
'
8. A power-driven elevator system having a car
in the hoistway with a longitudinally collapsible
gate closing the car gateway, and having an op
There has thus been described an illustrative 10 erating control means comprising a movable con
elevator system with car gate and power control
trol arm and cooperating therewith a shiftable
features embodying the present invention; but
actuator mounted on the car, said actuator hav
since various matters of combination, arrange
ment and construction may be Varied within the
essence of the invention it is not intended to limit
the same to such matters except so far as set
forth in the appended claims.
What is claimed is:
1. A power-driven elevator system having a car
in the hoistway with a longitudinally collapsible
gate closing the car gateway, and having an
operating control means comprising a movable
control arm and cooperating therewith a shift
able actuator mounted on the car, said actuator
having connections by which it may be positioned .
by the gate and adapted thereby to render the
power drive inoperative when the gate is open
and operative when the gate is shut; said system
characterized in that the collapsible gate is
mounted at the gateway lintel for downward self
closing by gravity expansion when released. and
is composed of a pivoted series of pairs of crossed
links between transverse bars whereby the link
ends spread transversely apart with the longi
tudinal collapse of the gate during its opening,
and vice versa; said actuator connections being
operated by such transverse gate spreading ac
ing connections by which it may be positioned by
the gate and being adapted thereby to render the
power drive inoperative when the gate is open
and operative when the gate is shut; said system
characterized in that the collapsible gate is com
posed of a pivoted series of linkage members act
ing to spread transversely apart with the longi
tudinal collapse of the gate during its opening,
and vice versa; and said actuator connections be
ing operated by such transverse gate spreading
action and adapted to cause a shifting of said ac
tuator and thereby a control movement of said
control arm to render inoperative the power drive.
9. A system as in claim 8 and wherein the said
actuator connections comprise a slider shank
mounted to move transversely out and in and car
rying the actuator, and connecting means be
tween the gate and shank, whereby the gate
spreading action during opening moves out
wardly the shank and actuator.
10. A system as in claim 8 and wherein the said
actuator connections comprise a slider shank
mounted to move transversely out and in and
carrying the actuator, and connecting means be
tween the gate and shank whereby the gate
tion to cause a shifting of said actuator and
spreading action during opening moves outward
thereby a control movement of said control arm
ly the shank and actuator; said connecting means
to render inoperative the power drive.
40 consisting of a direct pivoting of a gate link end
2. A system as in claim 1 and wherein is a
to the shank.
'
resilient spring means tending to open the closed
gate and to shift the actuator to render inoper
ative the drive.
3. A system as in claim 1 and wherein is a
11. A power-driven elevator having a car adapt
ed to travel up and down in the hoistway, with
a longitudinally collapsible gate ‘closing the gate
way, and having an operating control means; said
resilient spring means tending to open the closed
system
characterized in that the collapsible gate
gate and to shift the actuator to render inoper
is a drop gate mounted at the gateway lintel for
ative the drive, but insuf?ciently strong to over
downward self-closing by gravity expansion when
come gravity and lift the gate without supple
released, and is composed of a series of pairs of
mental e?ort.
50 pivoted crossed links and transverse guide bars
4. A system as in claim 1 and wherein is a
between which the link pairs are connected,
resilient spring means tending to open the closed
whereby the link ends spread transversely with
gate and to shift the actuator to render inopera
the upward collapse of the gate and vice versa;
tive the drive; such resilient means compris
and in that at the lintel are opposite sliders
ing springs arranged to operate symmetrically, 55 spring-pressed transversely, to which sliders the
and the said actuator connections comprising
top link-ends respectively are pivoted; whereby in
sliders moved by the said springs and connected
the manual opening of the gate such springs as
to the top ends of the top link pair.
sist the starting of the lifting movement, and in
5. A system as in claim 1 and wherein is a
pivoted latch adapted by gravity to take a posi
tion to hold up the opened gate, but retractible
to release the gate, and a stop to resist swing
when the gate bears on the latch.
’
6. A system as in claim 1 and wherein the
the gravity closing such springs. retard the drop
and reduce impact shock,
12. A power-driven elevator system having in
the hoistway a traveling car with a lonigtudinally
collapsible gate closing the car gateway, and
having an operating control arm and cooperating
said actuator connections comprise a sliding 65 therewith a shiftable actuator mounted on the
shank at the lintel on which the actuator is
car, said actuator having connections by which it
mounted, the same being shiftable outwardly and
may be positioned by the movements of the gate
inwardly, and said shank being connected to the
and adapted thereby to render the power drive in
gate linkage, whereby the ‘link-end spreading
operative when the gate is open and operative
action moves outwardly the shank and actuator 70 when the gate is shut; said system characterized
as the gate opens,
in that the collapsible gate is of the linkage kind
7. A system as in claim 1 and wherein the
with a system of pivoted cross links and has its
said» actuator connections comprise a sliding
upper part mounted at the gateway lintel for
shank at the lintel on which the actuator is
downward self-closing by gravity expansion?when
mounted, the same being shiftable-outwardly and -75 -released,- said actuators-connections‘beingpperated
2,411,882
.
by the lateral contraction of the linkage system
during such gravity expanding action of the
gate to cause shifting of said actuator in a man
ner to effect movement of said control arm to
render operative the drive, and vice versa.
13. An elevator system as in claim 12 and
wherein the car gate linkage spreads horizontal
ly when collapsing vertically and vice versa, and
is ?tted for limited bodily shift along the lintel,
and there is a resilient spring vmeans acting hori
zontally upon the gate to determine yieldingly its
position along the lintel and with tendency to
spread the gate linkage and thereby to lift and
open the gate but insufficient to lift it except with
supplemental lifting effort applied at will.
10
trol the power operation of the car and a control
actuator therefor movably mounted on the car,
and a connection from a horizontal end portion of
the gate linkage system to said control actuator
whereby the horizontal-distension of the linkage
systemduring gate opening causes movement of
the control actuator and switch to render inop
erative the power drive and vice versa.
' 17. An elevator system as in claim 16 and
wherein the mounting of the linkage gate upon
the lintel is such that the gate linkage may shift
bodily horizontally along the lintel, and wherein
is spring means near the lintel and associated
with the gate in a manner to determine yieldingly
15 the position of the gate linkage along the lintel.
14. A power-driven elevator having a car
adapted to travel up and down in the hoistway,
18. A power~driven elevator system having in
said system characterizedin that the collapsible
a shiftable actuator mounted on the car, said
the hoistway a traveling car with a longitudinally
collapsible gate closing the car gateway, and hav
with a longitudinally collapsible gate of the link
ing an operating control means comprising a
age type closing the car gateway, and having an
operating control means for the drive of the car; 20 movable contact ‘arm and cooperating therewith
gate is mounted at the gateway lintel for down-V '
ward self-closing by gravity expansion when re
actuator having connections by'which it may be
positioned by the gate and adapted thereby to
leased, accompanied by horizontal contraction , render the power drive inoperative when the
in width of the linkage system, and vice versa, 25 gate is open and operative when the gate is shut;
said system characterized in that the collapsible
with means actuated by the width contraction
gate is a drop gate mounted at the gateway lintel
and distension of the gate linkage system to oper
ate said control means.
15. An elevator as in claim 14 and wherein
the gate is ?tted for bodily horizontal shift on
for downward self-closing by gravity expansion
when released, and that such drop gate is com
of a series of pairs of pivoted crossed links
30 posed
and
transverse
guide bars between which the
the lintel, and there is a resilient spring-means
link pairs are connected, whereby the link ends
acting horizontally upon the linkage of the gate
spread transversely with the upward collapse of
to position it horizontally and with tendency to
the gate and vice versa; and wherein the said
distend the gate linkage and thereby to lift and
open it but insufficient to lift it except with sup-' 35, actuator connections comprise at the lintel oppo
site sliders spring-pressed apart transversely, to
plemental lifting effort applied at will.
16. In a power-driven elevator system with its
which sliders the top link-ends respectively are
pivoted; whereby in the manual opening of the
gate such springs assist the starting of the lift
of the lazy-tongs linkage kind comprising a sys
ing movement, and in the gravity closing such
tem of crossed and mutually pivoted swinging
springs retard the drop and reduce‘impact shock;
links, said linkage gate being hung from the gate
and the said actuator connections thus operated
way lintel and collapsible upwardly for opening
by such gate collapsing and expanding action
and expansible downwardly for closing the gate,
being thus adapted to cause shifting of said actu
and the linkage system of which undergoes hori
zontal distension during upward collapse and 45 ator and thereby effect control movements of said
horizontal contraction during downward expan
contact arm.
LE ROY H. KIESLING.
car traveling in a hoistway, and on the car a gate
sion, in combination with a control switch to con
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