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AW- 9, 193&
H. c. WALDMAN
2,126,066‘ '
INTERLOUKING DOOR AND ELEVATOR MECHANISM
Filed June 17, 1935
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INVENTOR.
BY
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ATTORNEY.
H. a w A L b M A N
‘ 2,12%,066
INTERLOCKING DOOR AND ELEVATOR MECHANISM
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Filed June ‘17, 1935
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INVENTOR.
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ATTORNEY.
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Aug. Q, 1938.
H. c. WALDMAN
‘
23,126,066
INTERLOCKING DOQR AND ELEVATOR MECHANISM
‘ Filed June 1'7’, 1935
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INVENTOR.
13%.‘,
ATTORNEY;
Patented Aug. 9, 1938
UNITED STATS PATENT
E'Fl?E
2,126,066
INTERLOCKING DOOR AND‘ ELEVATOR
MECHANISM
Herman C.'Waldman, St. Louis, Mo.
Application‘June 17, 1935, Serial No. 26,983
16 Claims. (Cl. 187-31)
This invention relates generally to elevator
door structures and has more particular reference
to interlocking door and elevator mechanism
adapted especially, though not exclusively, for
5
use in connection with electrically operated ele
vators.
‘
My invention has for its prime object the pro
vision of an interlocking door and elevator mech
anism which will permit operation of the. ele
vator car only when the door is latched in closed
position and will permit opening of the door only
when the car is at the landing which the door
protects.
‘
My invention has for another object the pro
15 vision of mechanism of the kind stated which will
be positive in operation, may be accurately ad
justed for efficient performance of its protective
functions, and which completely protects the pub
lic against the hazards of improper elevator door
20 operation.
And with the above and other objects in view,
my invention resides in the novel features of
form, construction, arrangement, and combina
tion of parts presently described and pointed out
in the claims.
In the accompanying drawings (three sheets)»
Figure 1 is an elevational view of an elevator
door and interlock construction of my invention
as seen from the well of the elevator, portions
of the door-guide structure being broken away;
Figure 2 is an enlarged fragmentary view of the
interlock construction in normal door-locking po
sition;
Figure 3 is a view similar to'Figure 2, showing
35 the interlock in door-released position and the
door opened;
the door-latches and interlock, illustrating‘ the
coordination of the several parts when the‘ door is
‘
Figure 5 is an enlarged detail view of the base
plate of the door guide-shoe;
Figure 6 is an enlarged detail view of the shoe
plate of the door guide-shoe;
Figure '7 is a fragmentary side View of a door
guide-shoe mounted on the door, portions of the
guide being shown by dotted lines;
Figure 8 is an end View of a door guide-shoe;
Figure 9 is a fragmentary sectional plan view of
50 an elevator in its well and my improved door and
interlock construction;
Figure 10 is a fragmentary sectional view of the
interlock construction taken approximately along
’ the line Ill-Ill, Figure 9; and
55
Referring now more in detail and by reference
characters to the drawings, which illustrate. a
preferred embodiment of the invention, l desig
nates an elevator car, 2 the well in which the car
I is arranged for travel, 3 a ?oor-landing of the
well, and 4 the access-opening at the landing 3
through the elevator-well casing or wall 5, all of
conventional construction, as diagrammatically 10
shown in Figure 9.
v
Suitably mounted on the well side of the wall 5,
is a pair of vertically disposed angle-members M,
each having one leg m presented inwardly of the
Well 2, and riveted, welded, or otherwise ?xed to 15
said angle-legs, are door guides A, A’, which ex
tend vertically both above and below the opening
4 adjacent the respective side margins thereof,
the guides A, A’, preferably, though not necessar
ily, comprising metallic angle members each hav
ing one leg 6 suitably spaced from the other leg
m’ of angles M and presented toward the open
ing 4 and the other leg 1 presented inwardly of
the well 2.
Mounted for vertical movement in opposed re 25
lation between the guides A, A’, is a pair of upper
and lower door sections B, B’, respectively, which
are mutually approachable for closing or ob
structing the landing opening 4. The doors B,
B’, are ?exibly connected in counterbalanced
relationship by means of respective side chains 8
connected to brackets 9 mounted on the lower side
corners of the upper door B, which chains 8 pass
upwardly and over sheaves l0 suitably mounted
in brackets II on the respective angles M, and
thence downwardly for engaging respective hang
Figure 4 is an enlarged fragmentary view of
locked in closed position;
interference bar construction taken approximate
ly along the line I l—-| I, Figure 9.
Figure 11 is a fragmentary sectional view of the
er-rods l2, l3, adjustably upstanding from ‘re
spective brackets 14 laterally outstanding from
the respective upper side corners of the lower
door B’, as best seen in Figure 1.
Each door section B, B’, is equipped at its re
spective side margins with a pair of vertically
spaced guide shoes C of unique utility and func
tion, as will presently more particularly appear,
which slidingly engage the respective guides A, 45
A’, for guiding the doors B, B’, in their vertical
movement therebetween.
Each shoe C comprises a side wall or plate l5
of substantially rectangular contour, equipped
with a pair of vertically spaced laterally extend 50
ing ears or lugs it for attachment of the plate I5
to the adjacent side margin of the door B or B’,
the shoe wall or plate l5 projecting from the door
section between the leg m’ of the angle M‘ and 55
2
2,126,066
the adjacent approximately parallel leg 6 of the particularly appearing, be precisely controlled
guide A or A’, as best seen in Figure 9.
On its inner side face, that is to say, its side
face opposite the guide leg 6, the plate I5 is pro
Cl
and determined, the latch-bar 33 also carries an
angular lug or stop 38 for impinging the free
end of a stop-bolt 39 adjustably threaded through
vided with a centrally disposed rib H, which, as
best seen in Figure 5, has an arcuate face for
slidably engaging the adjacent side face of the
guide-leg 6 with minimum friction.
Opposing the other side face of the guide-leg 6
and forming part of the shoe C, is a wall or plate
58 also of substantially rectangularcontour and
likewise having a centrally disposed rib l9 simi
larly having an arcuate face for slidably engag
a lug or bracket 40 mounted on the face-plate
2t, as best seen in Figure 4.
ing the guide—leg 5, the walls or plates 15, I8,
thus embracing the guide-leg B for, in cooperation
A’, and each having an upper ?at face upon
which the free end of the corresponding latch
therewith, guidingly restraining the door B or B’
against inward or outward departure from its de
bar 32, 33, impinges for preventing opening move
ment of the door-sections B, B’, unless the han
dle 35 is ?rst manipulated for withdrawing the
sired vertical plane of movement.
7
Also, each plate !8 is equipped with a laterally
disposed shoulder 20, which is continued endwise
outwardly beyond the side margins of the plate
[8 by respective suitably curved and tapered
horns 28, the shoulder 2 opposing the edge
margin of the guide-leg 6 for co--o_perably guid
ingly restraining the door B or B’ against lateral
or sidewise departure from its desired vertical
path of movement.
The shoe-plate I8 is adjustably connected to
the plate 55 and, for such purpose, is provided
Normally, that is to say, when the door-sections
B, B’, are in substantially abutting or closed po
sition for obstructing the landing-opening 4, the
latch-bars 132, 33, respectively overtravel or have
door-latching co-operation with a corresponding
pair of catches or detents M, (52, projecting suit
ably from the plane of the respective guides A,
latch-bars 32, 33, from latching registration with
the detents or keepers M, 42, the latter, it may ~
here be said, each being provided with a suit
ably inclined or beveled face 43 in the customary
manner for automatically relatching the lower
door-section B’, which also, in turn, by reason
of the ?exible connection between the door-sec
tions effectively latches the upper door-section
B in closed position.
The detent or keeper 42 is mounted directly
upon the inside face of the leg ‘i of the guide A’.
with an elongated slot or aperture 22, through
which is disposed a suitable fastening element
preferably in the form of a bolt 23 threaded, in
turn, into a registering pad or embossment 24
provided on the base-plate l5, whereby the shoul
der 20 may be projected more or less from the
door margin for, in such manner, adjusting the
The detent or keeper 4%, however, is preferably ,
an integral extension of an adjacent vertical side
wall lid of a skeleton frame D, which forms a sup
port and partial enclosure for a mechanical
spacing of the door relatively to the guide-leg 6,
spectively, by means of which the frame D is
attached suitably to the conjoined legs m and ‘I
of the angles M and A, the intervening portion
of said legs being cut away and removed, as best 40
the door B or B’ being most precisely and ex
actly positioned or aligned in its spaced rela
tionship with and between the guides A, A’, by
means of respective set-screws or the like 26 ad
justably threaded through ears 25 projecting lat
erally outwardly from the outer face of the plate
l8 for endwise impingement upon suitably re
3 cessed portions 2'! of the ears or lugs I6 of wall
or plate [5, as best seen in Figure 7. Thus the
most minute and particular adjustment of the
shoe-plate or wall l8 and its carried shoulder 20
may be effected by manipulating either or both
of the screws 25, suitable jam-nuts 28 on the
respective bolts 25 serving for rigidly securing
the shoe-plate l8 in its adjusted position.
Suitably mounted on the well-facing side of
the lower door B’, is a panel or plate 29 carrying
a bracket 30 in which is pivotally mounted one
end-portion of substantially a bell-crank latch
handle 3!. In turn, pivotally connected to the
_ handle 3! on the respective opposite sides of its
pivot bracket 30, is a pair of latch-bars 32, 33,
GO which extend outwardly in opposite directions
across the face of, and slidably through support
ing brackets 34 suitably mounted on, the door
electrical interlocking apparatus, presently to be
described, the wall fill of the frame D having a
pair of upper
lower ears or lugs 45, 46, re
seen in Figures 3 and 4.
The frame D includes a second vertical side
wall lll suitably spaced from the wall 44, and up
per and lower end or transverse walls 48, 49, re
spectively, connecting the side-walls d4, 41.
Slidably mounted in and through the side-walls
44, Q1, of the frame D and disposed in endwise
registration with the path of movement of the
latch-bar 33 over the detent 1H, is a latch-bolt
50, which,’ at its end projecting from the frame
wall 44, is provided with a coupling-head 5| of
substantially inverted U-shape.
The coupling-head 5i is adapted for co-opera
tive coupling engagement with a hook or tongue
52 upstanding from the free end of the bar 33, ;
whereby the bolt 56 is caused to be shifted by
and with the bar 33 inwardly through the frame
D toward the ‘door B’ when the bar 33 is with
drawn from superposed registration with the de
tent 4H for unlatching the door B’ from closed
position and outwardly through the frame D away
from the door B’ when the bar 33 is returned
B’ for normally projecting substantially beyond
to superposed registration with the detent 41
the corresponding side margins thereof, as best
seen in Figures 1 and 4.
One of the latch-bars, as 33, is provided with
for latching the door B’ in closed position.
On its upper face, the bolt St is provided with 65
a notch 53 adapted normally, that is to say, when
the bolt 58 is shifted outwardly in the frame D
an angular lug 35, through which is adjustably
threaded an eye-bolt 36, and a tensional mem
her or spring 3'! is engaged between the eye of the
bolt 36 and the adjacent bracket 34 for yield
ingly biasing the latch-bars 32, 33, in extended
position for projecting substantially beyond the
side margins of the door-section B’.
'
And, in order that the projection of the latch
. bars 32, 33, may, for purposes presently more
responsive to door-latching movement of the
bar 33, into superposed registration with the de
tent ?i, for registration with a mechanical in
terlocking bar or plunger 56 suitably mounted
for vertical movement in the frame D and biased,
as by a suitable tensional member in the form
preferably of a spring 55, for normally entering
into the notch 53 for preventing inward shift- 7524
2,126,066
ing movement of the bar 50 and thus, in turn,
preventing door-unlatching movement of the
latch-bar 33.
At its upper end, the plunger 54 slidably ex
tends through the upper frame-wall 48 and has
link connection, as at 56, with the horizontally
disposed arm of a bell-crank 51, whose other or
vertically disposed arm has adjustably mounted
on its free end an arm 58 inclined toward the
10 elevator well 2, as best seen in Figure 10.
3
porting a vertical upstanding interference bar 66,
which, passing slidably through a guide 61 at
tached to the frame D, is anchored suitably to the
upper end of the rod I2.
Normally, when the door-sections B, B’, are in
closed position, the arm 65 at its free end, and
consequently also the bar 66 at its lower end, are
disposed immediately superjacent to the end of
the bolt 50, which projects from the frame-wall
41, so that the bolt 50 is free to be shifted out
In turn, the arm 58 at its free end supports
a roller 59 disposed in the path of movement
wardly under the arm 65 into door-latching and
of a cam 66 mounted on the car I, whereby, on
However, upon initiating opening movement of
the door B’, the bar 66 drops into registration
arrival of the car I at the landing 4, the cam 60
will engage the roller 59 and swing the bell
crank 51 for lifting the plunger 54 from the notch
53 for. releasing the bolt 50 from the plunger 54.
Pivotally depending from the bolt 56 interiorly
of the frame D, is a swingable contact-carrying
arm 6|, which at its lower free end carries a
conducting switching-member or bridge-piece 62
for co-operative circuit-closing engagement with
a pair of paced contacts 63 mounted on and in
sulated from the frame-wall 4‘! and connected or
25 included in suitable manner in the circuit (not
shown) which supplies motivating current to the
elevator hoisting motor (also not shown) for
interrupting the supply of current thereto, and
preventing motivation thereof whenever the
switching-member 62 is disengaged from the con
tacts 63.
Adjacent its pivoted end, the arm 6| is engaged
by one end of a compression member in the form
of a coiled spring 64, whose other end bears
35 against the frame-wall 41, the bias of the spring
64 causing the free end of the arm 6| to bear
more or less against the frame-wall 44.
Normally, that is to say, when the bolt 56 is
1O
circuit-closing position.
with the now inwardly shifted end of the bolt 55 15
and interferes with or prevents the return of the
bolt 50 to its normal position until the door-sec
tion B’ is restored to closed position.
In use and operation, it will be seen that the
interlock-bolt 56 has two alternative positions. 20
In the normal or initial position thereof, as shown
in Figure 2, operation of the elevator car I in the
well 2 is permitted by reason of engagement of
the switch member 62 with the contacts 63,}while
operation of the door-sections B, B’, from closed 25
position is prevented vby reason of the engage
ment of the plunger 54 in the notch 53 of the
bolt 50.
On arrival of the car I at the landing 3, the
plunger 54 is disengaged from the notch 53 and
the bolt 56 is permissively shiftable from initial
position for unlatching the door-sections B, B’.
When, for such purpose, the latch-bars 32, 33,
are withdrawn from the keepers 42, 4|, respec
tively, the bolt 50 is, by co-operation of the tongue 35
52 with the head 5 I , shifted to its alternative posi
tion, in which position of the bolt 56, the door-sec
tions B, B’ become permissively operable from
in outwardly shifted'door-latching position, the
closed position, while the car I is prevented from
arm 6| takes a diagonal position within the frame operation in the well 2 by reason of the disen 40
D, as best seen in Figures 1, 2, and 4, which is . gagement of the switch member 62 from the con
tacts 63.
suf?cient to cause the switching-member 62 to
engage the contacts 63 and preserve the continu
When the door-sections B, B’, are shifted from
ity of the elevator motor circuit.
closed position, the interference bar 66 moves into
45
However, as has been said, when, the elevator registration with the bolt 50 for preventing re
car I arrives at the landing 3, the plunger 54 is storation thereof to its initial position until the
door-sections B, B’, are returned to closed posi
released from the bolt 50, and the latter there
tion, as shown in Figure 3.
upon becomes free to follow the latch-bar 33 as
the same, together with its companion bar 32,
is shifted inwardly of the door-section B’ for clear
ing the respective detents 42, 4|, in preparation
for opening movement of the door-sections B, B’.
Hence, as the latch-bar 33 is withdrawn from
registration with the detent 4|, the clutch-head
5| follows the tongue 52, and the bolt 50 shifts
inwardly in like direction until the arm 6 I, biased
by the spring 64, takes a position approximately
flatwise against the frame-wall 44, as best seen
in Figure 3, in which position of the arm 6I, the
00 clutch-head 5|, in following the tongue 52, now
stands clear of the detent 4|, and, the latch-bar
33 now also being‘clear of the detent 4|, the
tongue 52 may freely drop out of engagement
with the clutch-head 5| as the door section B’
moves downwardly toward open position.
7
Furthermore, when the door-sections B, B’, are
returned to closed position and the bolt 50 be
comes permissively operable for restoration to
initial position, the co-operation of the tongue 52
with the head 5| compels the restoration of the
bars 32, 33, to door-latching position thereof over
the keepers 42, 4|, respectively, before the bolt
56 may reassume its initial position for again per
mitting operation of the elevator car I.
And, ?nally, when the car I is moved from the
landing 3, the plunger 54 reassumes engagement
with the notch 53, preventing movement of the GO
bolt 50 from its initial position and thus, in turn,
preventing door-unlatching manipulation of the
latch-bars 32, 33.
It will be seen that the bolt 50 moves from‘initial
to alternate positions for interlocking the per
missive operation of the door-sections B, B’, with
the permissive operation of the elevator car |
At the same time, the switching-member 62 is
disengaged from the contacts 62, and, the elevator
motor circuit being thereby interrupted, move ’ responsively to motion of the latch-bar 33 from
ment of the car I is prevented while the bolt 50
door-latching to door-unlatching positions.
is in its described door-released, inwardly shifted
However, the bolt 50 is mounted for shiftable
position.
movement laterally in and on the guide A, while
Attached to the lower end of the door-suspen
the bar 33 is mounted for shiftable movement
sion rod I2, is a goose-neck arm 65, which has its
K
laterally in and on the door-section B’. It hence
free end disposed adjacent the frame-wall 41, in imperatively follows that the door-section B’ must
75 the vertical plane of the bolt 50, the arm 65 sup-' have de?nite and unchanging lateral relation; 75
4
2,126,066
ship with respect to the guide A for co-ordinating
the bar 33 'on the door B’ with the bolt 50 on the
guide A for successfully effecting the interlock
ing functioning of- the bolt 5|] in the manner and
CR
for the purposes described.
Unless such relationship is maintained, many
troubles may ensue.
For example, if there is
side play between the door B’ and guides A, A’,
the travel of the bar 33 toward the guide A may
move the worn shoe, replace it with a new shoe,
and then reinstall the door, all of which com
pels the closing-down of the elevator, entails
a great deal of expense and time, and deprives
the'occupant of the building of the use of the
elevator.
These troubles are completely eliminated in and
by the present structure by reason of the fact
that the shoe-plate I8 is not only adjustable
10 be insufficient to return the bolt 50 fully to its
relatively to the plate IE, but also may with ease
initial position, so that the member 62 will fail
to re-engage the contacts 63 and thus prevent the
operation of the car I, even though the door
sections B, B’, be latched in closed position.
Again, as will be readily understood by those
skilled in the art, there are some elevator instal
lations wherein a handle, similar to the latch
handle 3!, is mounted on the room-side of the
door-section B’ and is suitably operatively con
20 nected to the handle 3| for actuation thereof, in
and dispatch be detached from the plate I5 by
merely removing the bolt 23, and these opera
tions may be performed from the well-side of
door-opening direction, by a person on the room
side of the door. All so-called push-button ele
vator installations, for example, are so equipped.
In such an installation, the described de?nite
25 and unchanging lateral relationship of the door
B’ in the guides A becomes particularly impor
tant. Thus, for example, the notch 53 may fail
to register with the plunger 54, and the latter,
therefore, fail to lock the bolt 50 against move
30 ment from initial position even though the switch
member 62 is engaging the, contacts 63 for per
mitting'operation of the car I. Obviously, in such
event, the door-sections B, B’, could be opened
when the car i was away from the landing 3,
351 thus defeating effective functioning of the inter
look.
It is, therefore, one of the prime purposes of
my invention to provide means for effectively
avoiding or eliminating the foregoing di?icul
ties, which is accomplished by the provision of
the adjustable shoes C placed on the door-sections
B, B’, for guiding the same in and between the
guides A, A’, whereby, when the shoes C have
been properly adjusted by shifting the shoe-plate
l8 relatively to the plate l5 for suitably forcing,
as may be said, the door B’ toward the guide A,
the side play of the door B’ is substantially elim
inated, and the door B’ will travel vertically
in horizontally aligned position with respect to
the guide A.
After the shoes C have been thus adjusted
and permanently set and locked, it is then possi
ble to, with con?dence, precisely and minutely
adjust the travel of the bar 33 by manipulating
the screw-stop 39, so that, when the tongue 52
is in engagement with the head 5!, and the bar
33 is extended from the door B’ to its proper
limit, both the switch member 62 will make posi
tive electrical contact with the contacts ?3fand
the plunger 54 will make positive bolt-locking
engagement with the notch 53.
However, it is to be emphasized that, as time
goes on, constant wear and tear of the shoes C
will obviously occur to such an extent that un
desirable side play of the door B’ in its guides A
is more than can be taken up either by adjust
ing the shoes C‘ on the door B by shifting the
plate l8 relatively to the plate l5, or by adjust
ing the travel of the latch-bar 33 on the door B’
70 by manipulation of the stop 39, as before de
scribed.
Heretofore, so far as I am aware, when the
guide-shoes on elevator-doors wear to such an
extent as to require replacement, it has been
75. necessary to take down the elevator-door, re-'
the door B’ without disturbing the door itself.
In practice, the several parts of the shoe C are
made fully interchangeable, so that a new shoe
plate l8 may be exchanged for the worn one, and,
when the new plate I8 is installed, the door B’
is again in its proper position, and all this may
be done with minmum time and expense and
with virtually no interruption to the elevator
service.
It may be reiterated that it is impossible, by
reason of the co-action of the interference bar
66 with the bolt 50, to manually restore the bolt
50 to initial position when the door-sections B, B’,
are open, and it will be readily apparent that
the objects of my invention are thus ef?ciently
accomplished by the combination and co-ordina
tion of the several parts of the mechanism as de- ‘
scribed, more particularly, it may be pointed out,
with respect to the adjustment of the movement
of the latch-bar 33, the adjustment and renew
ability of the shoes C on the door B, and the
several interlocking members as the plunger 54, ~
the contact-arm 6|, and the interference bar 66,
all of which co-operates, as I have set forth,
for providing a protection to the landing 3,
which is absolutely safe, positive, and fool-proof
against accidents, and I might add that such Ill)
complete protection is, so far as I am aware,
practically wholly unobtainable Without the de
sired co-operation of the several parts mentioned.
It will be understood that changes and modi
?cations in the form, construction, arrangement
and combination of the several parts of the door
and interlock structure may be made and sub
stituted for those herein shown and described
without departing from the nature and principle
of my invention.
_
Having thus described my invention, what I
claim and desire to secure by Letters Patent is:
1. In combination with an elevator-well having
a landing, a car arranged for travel vertically
in the well, and a door shiftable vertically with ,.
respect to the well for protecting the landing,
means including a keeper on the Wall of the well
and a bar shiftable on the door transversely
with respect to the well for engagement normally
during travel of the car with the keeper for
latching the door in closed position, a bolt ar
ranged on the wall of the well for movement on
a line parallel with the line of movement of the
latch-bar and engageable with the bar when the
latter is in normal position, means for securing 65
the bolt against movement for normally prevent
ing movement of the latch-bar to door-opening
position, and means operably responsive to posi
tion of the elevator at the landing for effecting
release of the bolt for enabling movement of '
the latch-bar to door-opening position.
2. In combination with an elevator-well hav
ing a landing, a car arranged for travel vertically
in the well, and a door shiftable vertically with
respect to the Well for protecting the landing,
2,126,066
means including a keeper on the wall of the
well and a bar shiftable on the door transversely
with respect to the well for engagement normally
‘ during travel of the car with the keeper for latch
ing the door in closed position, means compris
ing a bolt arranged on the wall of the well for
endwise shiftable movement on a line parallel
with the line of movement of the latch-bar
and engageable with the latch-bar when the
10 latter is in normal position and a plunger mount
ed on the well for movement at right angles
to the bolt for normally engaging the bolt for
preventing movement of the latch-bar to door»
opening position, and means operably responsive
to position of the elevator at the landing for
disengaging the plunger from the bolt for en
abling movement of the latch-bar to door
opening position.
3. In combination with an elevator-well hav
ing a landing, a car arranged for travel vertically
in the well, and a door shiftable vertically with
respect to the well for protecting the landing,
means-including a keeper on the wall of the well
and a bar shiftable on the door transversely
with respect to the well for engagement normally
during travel of the car with the keeper for latch
ing the door in closed position, means compris
ing a marginally notched bolt arranged on the
wall of the well for endwise shiftable movement
on a line parallel with the line of movement of
the latch-bar and hookwise engageable with the
latch-bar when the latch-bar is in normal posi
tion and a spring-pressed plunger mounted for
movement on the wall of the well at right angles to
the bolt for engagement with the bolt at its notch
for normally preventing movement of the latch
bar to door-opening position, and means respon
sive to elevator position at the landing for dis
engaging the plunger from the bolt for enabling
40 movement of the latch-bar to door-opening posi
tion, the latch-bar moving away from the bolt on’
opening movement of the door.
‘ ‘i. In combination with an elevator-well having
a landing, a car arranged for travel vertically in
the Well, actuating mechanism for the car includ
ing an electric circuit, and a door shiftable ver
tically with respect to the well for protecting the
landing, means comprising a bar shiftable on
the door transversely with respect to the well for
normally during travel of the car releasably latch
ing the door in closed position, a bolt arranged on
the wall of the well for movement on a line parallel
with the line of movement of the bar and hook
wise engageable with the bar when the latter is
in normal position, means for releasably securing
the bolt against movement for normally pre
venting movement of the bar to door-opening
position, means operably responsive to position of
the elevator at the landing for effecting release
(30 of the bolt for enabling movement of the latch
_ bar to door-opening position, the bolt being shift
able upon movement of the latch-bar to door
opening position, means responsive to movement
of the bolt to door-opening position for inter
* rupting the circuit for preventing car-operation
when the bar is in door-opening position, and
means responsive to door position for preventing
restoration of the bolt to normal position while
the door is open.
5. In combination with an elevator-Well having
a landing, a car arranged for travel vertically in
the well, and a door shiftable vertically with re
spect to the well for protecting the landing, guides
on the wall of the well for the door, one of said
guides being interrupted, means including opposed
5
keepers on the guides and a bar shiftable on the
door transversely with respect to the well for
engagement normally during travel of the car
with the keepers for latching the door in closed
position, a frame on said one guide at the inter- ,
ruption therein, means comprising a notched bolt
mounted for slidable movement on said frame
transversely of the well for hookwise engagement
with the latch-bar and a spring pressed plunger
also mounted for movement on said frame ver
10
tically of the well for endwise engagement with
the bolt at its notch for normally preventing
movement of the latch-bar to door-opening posi
tion, and means responsive to elevator position
at the landing for disengaging the plunger from 15
the bolt for enabling movement of the latch
bar to door-opening position, the latch-bar mov
ing away from the bolt on opening movement of
the door.
6. In combination with an elevator-well hav
ing a landing, a car arranged for travel vertically
in the well, a door shiftable vertically of the well
for protecting the landing, and guides for the
door ?xed on the wall of the well, means includ
ing a bar shiftable on the door transversely of the
well for normally during travel of the car latch
ing the door in closed position, means compris
ing a bolt mounted on one of the guides for de
tachable engagement with the bar for movement
_ transversely of the Well by and with the bar for
preventively interlocking the operation of the car
with permissive operation of the door, and means
for adjustably maintaining vertical alignment of
the door relatively to the guides for co~operative
interlocking engagement between the bar and
bolt.
'7. In combination with an elevator-well hav
ing a landing, a car arranged for travel in the
well, a shiftable door for protecting the landing,
and guides for the door ?xed on the wall of the
40
well, means including a bar shiftable on the
door for normally during travel of the car latch
ing the door in closed position, means comprising
a bolt mounted on one of the guides for detach
able engagement with the bar for movement by
and with the bar for preventively interlocking
the operation of the car with permissive opera
tion of the door, and means for adjustably main
taining alignment of the door relatively to the
guides for co-operative interlocking engagement
between the bar and bolt, said last named means 50
including a shoe comprising a ?rst member ?xed
on the door and engaging a guide, a second mem
ber for opposingly engaging the guide, and ele
ments for adjustably securing the second member
to the ?rst member.
8. In combination with an elevator-well hav
ii‘ig a landing, a car arranged for travel in the
well, a shiftable door for protecting the land
ing, and guides for the door ?xed on the wall of
60
the well, means including a bar shiftable on the
door for normally during travel of the car latch
ing the door in closed position, means comprising
a bolt mounted on one of the guides for detach
able engagement with the bar for movement by
and with the bar for preventively interlocking the 65
operation of the car with permissive operation of
the door, and means for adjustably maintaining
alignment of the door relatively to the guides for
co-operative interlocking engagement between the
bar and bolt, said means including a shoe com
prising a ?rst member ?xed on the door and en
gaging a side of a guide, a shouldered second mem
ber for engaging both the margin and the op
posite side of the guide, and elements for ad
75
2,126,066
Qjustably securing the second member to the ?rst
member.
9. The combination with an elevator-door and
its guide, of a guide-engaging shoe comprising a
pair of separable plates for disposition upon op
posite sides of the guide, and means for securing
the shoe to the door in ?xed relation thereto and
the plates together for guide-engagement.
10. The combination with an elevator-door and
10 its guide, of a guide-engaging shoe comprising
?rst and second separable plates spaced for dis
position upon opposite sides of the guide, means
for securing the ?rst plate to the door, and means
for securing the second plate to the ?rst plate
in a predetermined ?xed relation thereto.
15
11. The combination with an elevator-door and
its guide, of a guide-engaging shoe including ?rst
and second separable plates spaced for disposi
tion upon opposite sides of the guide, lateral pro
jections on the ?rst plate for securement thereof
on the door, and means for adjustably securing
the second plate to the ?rst plate.
12. The combination with an elevator-door and
its guide, of a guide-engaging shoe including ?rst
25
and second separable plates spaced for disposi
tion upon opposite sides of the guide, the second
plate being slotted, lateral projections on the
?rst plate for securement thereof on the door,
and means comprising a bolt projecting through
said slot and engaging the ?rst plate for securing
the plates adjustably together.
13. The combination with an elevator-door and
its guide, of a guide-engaging shoe‘ comprising
?rst and second separable plates spaced for dis
position upon opposite sides of the guide, lateral
35
?anges on the ?rst plate for securement thereof
upon the door, the second plate being slotted and
having a shoulder for engaging a margin of the
guide, means comprising a bolt projecting
through said slot and engaging the first plate for
securing said plates operatively together, and
means for shifting the second plate relatively to
the ?rst plate for marginally spacing said shoul
der from the door.
I
14. In combination with an elevator-well hav
ing a landing, a car arranged for travel in the
well, a shiftable door for protecting the landing,
and guides for the door ?xed on the wall of the
well, means including opposed keepers ?xed on
the guides and a bar pivoted on the door for
shiftable movement transversely of the door for
engagement normally during travel of the car
with the keepers for latching the door in closed
position, and means for adjustably regulating the
movement of the bar for co-operative engage
ment with the keepers.
15. In combination with an elevator~well hav
ing a landing, a car arranged for travel verti~
cally in the well, and a door shiitable vertically
of the well for protecting the landing, means in
cluding a keeper on the wall of the well and a
bar shiftable on the door transversely of the Well
for‘engagement normally during travel of the
car with the keeper for latching the door in closed
position, means comprising a shiftable bolt con
structed for detachable bar engagement for nor
mally preventing movement of the latch-bar to
door-opening position, the bar and bolt being
shiftable in a direction to permit opening move- -_-'
ment of the door, counter-weight means operably
associated with the door, and means actuable by
the counter-weight means for preventing retro
grade movement of the bolt when the door is in
open position.
16. An elevator-door mechanism comprising a
plurality of guide members mountable in oper
able juxtaposition to a door-opening, a door
member shiftable within said guides, a length
wise shiftable latching-bar mounted on the door, ‘
a lock-housing mounted in ?xed juxtaposition to
the guides, detent means operably disposed in the
lock~housing for engagement with the latching
bar, said detent means being restricted to longi—
tudinal movement in a path transverse to the 35
path of movement of the door under actuation
by the latching-bar, said latching-bar and said
detent means being mutually restricted to dis
engagement in a path parallel to the path of
movement of the door, counter-Weight means
operably associated with the door, and slide
means mounted for longitudinal movement with
‘respect to the guide means, said slide means be
ing actuable by the counter-weight means and
being selectively engageable with the detent
means for directly preventing retrograde move
ment of the detent means when the door is in
open position.
HERMAN C. WALDMAN.
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