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Патент USA US2115201

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April 26, 1938.
Filed Aug. 14, 1934
2 Sheéts-Sheet 1
Ba w”; /%
April 26, 1938.
Filed Aug. 14, 1934
2 Sheets-Sheét 2
Patented Apr. 26, 1938
Nello J. Girolami, San Francisco, Calif.
Application August 14, 1934, Serial No. 739,823
3 Claims.
(Cl. 177-336)
This invention relates to improvements in
elevator control systems and more particularly
to semiautomatic “signal control” elevators hav
ing remote “dispatch” boards from which the
5 movements of the elevators are supervised by
means of visible or audible signals to the elevator
The principal object of the invention is to in
dicate in advance to the supervising director at
the remote dispatch board all stops to be made
by the individual elevators.
Another object is to enable the director to con
trol the semiautomatic elevator stopping means
at will to delay individual elevators by causing
them to make extra stops to prevent the simul-v
taneous arrival of two or more elevators at the
main floor.
Another object is‘to simplify the electrical con
tact system for indicating the ?oor level of the
20 several elevators on the remote dispatch board.
Another object is to provide simple means for
correcting the individual floor level indicators
should they fail to register the true position of
the elevators.
Other objects and advantages appear as this
description progresses.
In this speci?cation and the accompanying
drawings, the invention is disclosed in its pre
ferred form. It is to be understood, however,
30 that the invention is not limited to this form
because it may be embodied in other forms within
the purview of the claims following the descrip
Fig. 1 is a schematic wiring diagram of an ele
35 vator control system constructed and wired in
accordance with this invention.
Fig. 2 is an elevation view diagrammatically
illustrating a conventional elevator installation.
Fig. 3 is a fragmentary front elevation of a
40 dispatch board adapted to be used in conjunction
with the present invention.
Fig. 4 is a detail view of one of the indicator
units with the front removed.
Fig. 5 is a horizontal section of the same.
Fig. 6 is a plan view of the commutator con
trolling the floor level indicating lights and its
driving means.
Fig. '7 is a side elevation of the same.
In detail the construction illustrated in the
50 drawings comprises the conventional elevator
system consisting of a plurality of elevator cars
one of which is shown at I in Fig. 2. To avoid
needless repetition, only one elevator and its as
sociated control system is shown, the controls
being identically duplicated for each elevator car.
The elevator car I is suspended on the cables 2
which are wound in the usual manner on the
drum 3 driven by the motor 4.
The motor 4 is energized from the source 5 of
electric power, see Fig. 1, through the interposed
motor-generator set 6 required in usual practice
to obtain the type of current suitable for operat
ing the elevator and the conductors ‘I and 8.
The magnetic relay switch 9 is interposed in the
conductor 1 to open the circuits 6, ‘I, 4 and 8.
The “stop” switches I0—-I0 corresponding to
the several ?oors at which the elevator may stop
are provided in the elevator. These switches are
selectively closed by the operator in advance.
usually upon the entry of the several passengers 15
to provide for the stopping of the elevator at the
floors requested. The switches I0 are connected
by the common wire I I to the low voltage second
ary coil of the transformer I2, the primary of
which is in circuit with the electric source 5. The 20
opposite poles of the switches I0 are connected
by the wires I3 to the plurality of contacts I4.
Closing any of the switches III impresses a poten
tial on the corresponding contact I4 from the
secondary of the transformer IZ'through the wire
II, the closed switch I0 and the wire I3.
The brush I5 is mounted in operative relation
to the contacts I4 and is driven by the elevator
car by the usual means (not shown). The brush
I5 is electrically connected back to the secondary 30
of the transformer I2 through the operating coil
I6 of the relay switch 9 and the wire I'I. As the
elevator progresses, the brush I5 moves seriatim
across the several contacts I4 until it reaches a
contact which has been rendered “live” by clos 35
ing one of the switches Ill. Current then ?ows
from the live contact I4 through the brush I5, the
coil I6, and the wire I‘I back to the transformer I2.
When the coil I6 is thus energized, the relay
switch 9 is opened, interrupting the flow of cur 40
rent from the source 5 to the motor-generator
set 8 and the driving motor 4 to bring the elevator
I to a stop at the floor selected. The usual regu
lating devices enable the automatic stopping of
the elevator at the correct level with respect to 45
this floor. After discharging the passengers, the
operator starts the elevator by the conventional
means which form no part of the present inven
tion. The elevator is again stopped when the 50
brush I5 arrives at the next “live” contact I4.
The contacts I4’ and I4” controlling the terminal
stops at each end of the elevator “run” are per
manently connected with the wire II and the
current source I2 by the unbroken wires I3’ and ‘6
E3". The elevator thus always automatically
stops at its terminus.
Stop switches (not shown) are provided in the
halls of the several floors of the building. Clos
ing one of these switches will automatically stop
the elevator at the given floor. The details of
the electric circuits, of which these switches form
a part, are well known to those skilled in the art.
The apparatus thus far described is the con
ventional automatic stopping signal control type
of elevator equipment, several makes of which
are operating commercially, to any of which the
present invention may be applied. The above
brief description of this equipment is deemed
sufficient for understanding the application of
the present invention thereto.
In the present improved control system, means
are provided for the supervising director at the
remote dispatch board to stop the elevator at will.
20 The several wires l3 are connected by the wires
iii to the multipole switch 20 located at the‘ dis
patch board. The opposite poles of the switch 29
are connected by the wire 2| to the wire I | . When
the switch 23 is closed, the switches H) are short
25 circuited, a bypath being provided for the cur
rent from the source I2 through the wires H
and 2|, the‘ switch 29, the wires l9 and I3 to all
of the contacts Hi. The elevator will thus stop
at all floors until the switch 23 is opened.
It is usual practice to provide the “non-stop”
switch 22 in the elevator to permit the operator
to effect an uninterrupted run to the terminus.
This switch is interposed in the circuit of the hall
stop switches above referred to thus enabling the
35 elevator to pass ?oors on which people are wait
ing. In the present instance, the switch 22 is
mechanically connected to the switch 23 which
is interposed in the wire 2|. This opens the cir
cult of the multipole switch 23 when the “non
40 stop” switch 22 is operated and prevents the di
rector at the dispatch board from stopping the
elevator when the operator thereof desires to
make an uninterrupted run.
The elevator floor level indicator at the dis—
45 patch board consists of the vertically arranged
row of lights 241—2411, each corresponding to a
?oor in the building. One side of these lights
251 etc. is connected by the common wire 25 to
the secondary of the transformer 26. The pri
mary of the transformer is supplied with current
from the source 5 through the wires 21 and 28.
The usual switch 29 is interposed in the line 21
to cut out the transformer 26 and the lights 24
when the dispatch board is out of use.
The opposite sides of the lights 24 are individ
ually connected by the wires 3|l1---3lln to the se
ries of brushes 3| which impinge on the rotary
commutator 32, see also Figs. 6 and '7. The com
mutator is advanced a predetermined distance by
means later to be described as the elevator pro
gresses past each ?oor.
When the elevator is located at its lower termi
nal, the brush 3|1 contacts the plate 33 while the
remaining brushes 3 |2 to 3|7 impinge on the plate
65 33. The plates 33 and 34 are connected by the
brushes 35 and 35 and the wires 3'! and 38 to the
opposite poles of the two way switch 39. The
central pole of this switch is connected by the
wire 40 to the secondary of the transformer 23
opposite the common lead wire 25 of the lights
When the elevator arrives at its lower terminal,
its driving and associated control mechanism is
reversed for the ascending run. The switch 39
75 is simultaneously operated by means known to
those skilled in the art to engage its central pole
with the contact to which the wire 31 is connected.
Current then ?ows from the transformer 26
through the wire 40, the switch 39, the wire 31
and the brush 35 to the plate 33. From this plate
the current flows through the brush 3|1 and the
wire 301 to the light 241 and then through the
wire 25 back to the transformer.
When the elevator rises to the second ?oor, the
commutator 32 is advanced one step to bring the 10
brush 3 I 2 into contact with the plate 4| interme
diate the plates 33 and 34. This plate is perma
nently connected to the transformer 23 through
the wire 42 and the brush 43 bearing on the plate
44 which is connected to the intermediate plate
4| by the short wire 45. The current thus avail
able ?ows through the brush 3 |2 and the wire 392
to the light 242 and back to the transformer 26
through the wire 25.
When the elevator rises to the third ?oor, the
commutator 32 moves to bring the brush 3 |2 on to
the plate 33 which is supplied with current from
the brush 35 and continues the illumination of
the light 242. The brush 3|3 is simultaneously
brought into contact with the intermediate plate 25
4| and supplies current to the light 243 through
the wire 303. The ascension of the elevator to the
next ?oor brings the brush 3|4 into contact with
the plate 4| and so on, thus progressively illumi
nating the lights 24 until the elevator arrives at
its upper terminal stop.
When this occurs, the two-way switch 39 is re
versed to engage its central pole with its opposite
contact to which the wire 38 is connected. This
breaks the circuit to the plate 33 and extinguishes
the lights 241 to 246 inclusive. Current then
flows from the transformer 26 through the re
versed switch 39, the wire 38 and the brush 33 to
the plate 34. The brush 3|n in contact with the
plate 34 completes the circuit to illuminate the
light 24n through the wire 30“. The movement
of the commutator is reversed as the elevator de
scends by means shortly to be described. The
brushes 3|n-3|1 are progressively brought into
contact with the plates 34 and 4| inversely to the
sequence described when the elevator ascends.
The commutator 32 is mounted on the shaft
46, see also Figs. 6 and '7, mounted in the stand
ards 41, 48. The solenoids 49 and 50 ?xed on
the standards 41, 48 are adapted to actuate the
commutator and have the armatures 5| and 52.
The pawls 53 and 54 are operatively connected to
the armatures 5|, 52 and are arranged to engage
the ratchets 55 and 55 having oppositely dis
posed teeth and ?xed to the ends of the com
mutator 32.
The springs 51 and 58 urge the pawls 53, 54
into inoperative position, retracted from the
ratchets 55, 56.
When the pawls are thus re
tracted, either pawl may operate its ratchet 55 60
or 56 and the commutator 32 without inter
ference from the other pawl. The usual means
are provided to retain the commutator stationary
except when driven. The construction shown
and above described is suggestive only and forms
but one means of accomplishing the desired
result. Other mechanism can be substituted
within the knowledge of those skilled in the art.
One side of the solenoids 49, 53 are connected
by the wire 59 and 59’ to the secondary of the
transformer 26. The other side of the solenoids
are connected by the individual wires 60 and 6!
to the opposite poles of the two way switch 62.
Means are provided for reversing this switch
when the elevator arrives at its terminal simul
taneously with the reversing of the switch 33.
The central pole of the switch 62 is connected by
the wire 63 tothe series of contacts 64. The
brush 65 is operatively mounted with respect to
the contacts 64 and is driven by the elevator
through a suitable reduction gear (not shown).
It is connected by the wire“ to the secondary
of the transformer opposite the wire 25.
The brush 65 momentarily engages a contact
The two series of light
compartments 16 formed by the vertical parti
56 and advances the commutator 32 one step. I
lights (not shown) controlled by the hall stop
When the switch 62 is reversed on the descend
ing run of the elevator the currentsupplied the
contacts 64 by the brush 65 ?ows through the
switches to indicate the ?oors on which passen
gers are waiting for the elevators.
The invention operates substantially as fol
lows: When the elevator is located at the lower
former 26 through the wire 66, the brush 65, the
contacts 64 and the wire 63 to the switch 62. If
the elevator is ascending, the current will con
switch 62, the wire 60, and energizes the opposite
solenoid 49. Actuation of the pawl 53 by this
25 solenoid will drive the commutator 32 in the re
verse direction since the teeth of the ratchet 51
are oppositely disposed to those of the ratchet
It occasionally happens that the contacts 64
30 become dirty and the brush 65 will either fail to
make proper engagement therewith or will re
bound and make a double engagement. The
commutator 32 will then fall to keep pace with
the elevator and the indicator lights will give an
35 incorrect reading of the floor level of the ele
In prior practice it has been usual to
correct the setting of the commutator manually.
This requires the services of a skilled workman
and the expenditure of an hour or more of labor.
The present invention provides the two way
switch 61 operable by the director at the dispatch
board. The central pole of the switch is con
nected by the wire 68 to the transformer 26. The
opposite poles of the switch are connected by the
45 wires 69 and ‘I0 to the wires 60 and 6| respec
tively leading to the solenoids 49 and 50. This
switch 61 is thus wired in parallel circuit to the
brush 65, the contacts 64 and the automatic
the dispatch board.
bulbs are mounted alongside each other in the
tinue through the wire 6|, energize the solenoid
5D and return to the transformer through the
wire 59’. When the solenoid is energized its
armature 52 actuates the pawl 54 in the ratchet
In the
circuit thus made, current flows from the trans
The light bulbs 241-—24n and ‘H are mounted
in suitable sockets on the rear base wall ‘I5 in
tions 11 and the horizontal partitions 18. The
light bulbs 24 and ‘H are separated from each
other by the walls 19 at the rear of the several
compartments ‘"5. The recesses formed by the
walls 19 are enclosed by the red and frosted glass 10
panes 80 and 8| in front of the floor level indi
cating lights 24 and the stop lights ‘H respec
tively. The removable front 82 has the narrow
strip of translucent glass 83 in juxtaposition to
the compartments ‘I6 and adapted to be illumi 15
nated by the lights therein.
The numbered indices 84 at the side of the dis
patch board are adapted to be illuminated by
10 each time the elevator passes a floor.
switch 62,
When the indicator lights 24 fail to register the
correct position of the elevator the director
operates the switch 61 to momentarily close the
circuit of either the ‘solenoid 43 or 56 as required.
The commutator will then be restored to its cor
55 rect position with respect to the floor level of
the elevator and the reading of the indicator
lights 24 will .be recti?ed.
The means for indicating in advance to the
director at the dispatch board the stops to be
made by a given elevator consists of the series of
lights ‘H arranged alongside the lights 24. One
side of these lights: ‘H is connected to the sec
ondary of the transformer 26 by the common
wire 25. The wires 13 individually connect the
65 other side of the lights ‘H to the wires l3 lead
ing from the “stop” switches Ill in the elevator.
The switches II! are connected by the wires II
and 14 to the secondary of the transformer 26
opposite the wire 25. Closing any of the switches
l0 thus, besides impressing a potential on the
contacts l4, causes current to ?ow from the
transformer 26 through the wires 14 and H, the
closed switch l6 and the wire 13 to illuminate
the corresponding light 1| and back to the trans
75 former through the wire 25,
most stop, usually the main lobby of the building,
the floor level indicating light 241 is illuminated 25
through the circuit previously traced from the
brush 3l1 supplied with current from the com—
mutator 32. As the passengers enter the ele
vator the operator closes the selected switches Hi
to set the automatic control system to stop the 30
elevator at the floors requested. This illumi
nates the corresponding lights ‘H as previously
After the elevator has been stationary at the
lobby a predetermined period, a visible signal is
automatically given the operator to start. The
director at the remote dispatch board may give
an audible signal for the elevator to start in ad
vance of the visible signal if other elevators in
the system have arrived or are about to arrive 40
at the main lobby. If no other elevator is due
to arrive at the lobby for some little time, the
director may signal the elevator located there
to delay starting.
The series of stop indicator lights 7|, giving the 45
director advance knowledge of the stops to be
made by the elevators, enables him to govern the
starting of the elevators accordingly. If an ele
vator is required to make an unusual number of
stops and thus prolonging its run, the director 50
can signal it to make an early start so as to pre
serve its timing with respect to the succeeding
As the elevator rises, the commutator 32 re
volves as previously described and progressively 55
illuminates the lights 241 etc. This presents a
red glow at the strip of glass 83 due to» the inter
posed panes 80. The stop indicator lights ‘H are
preferably of less candle power than the lights
24. The brighter lights 24 thus outshine the 60
neighboring lights ‘H to illuminate the glass strip
83 with a “light line” of practically uniform
brightness throughout its length as the elevator
rises. The dimly illuminated white lights ‘H
above this “light line” will not cause confusion
as to the exact floor level of the elevator.
Having described the invention, what is claimed
and desired to secure by Letters Patent is:
1. An elevator control system comprising an
electrical motive circuit; a plurality of stop 70
switches in the elevator adapted to be selectively
operated in advance; means for opening said
motive circuit when the elevator approaches
?oors corresponding to the manual switches op
erated; a remote dispatch board having index 76
means thereon; an indicating circuit including
means controlled by said manual switches for
illuminating said index means relatively dimly;
and means in said indicating circuit controlled
by the position of the elevator for increasing the
3. An elevator control system comprising an
electrical motive circuit; a remote dispatch
board; and electrical control network including
a plurality of manually operable switches in the
elevator corresponding to the several ?oors each
illumination of said index means.
2. An elevator control system comprising an
having one pole connected to a common line hav
ing a source of current therein, means connected
to said common line and adapted when energized
to open said motive circuit, means for connecting
electrical motive circuit including a relay switch;
an electrical control circuit including operating
means for said relay switch; a plurality of manu
ally operable switches in the elevator car con
nected in parallel in said control circuit and ar
ranged in series with said relay switch operating
means; means for connecting said manual
switches seriatim to said operating means as the
elevator progresses; a remote dispatch board
having a translucent pane therein; an indicating
circuit including lights controlled by said man
ual switches and adapted to illuminate said pane
20 relatively dimly and relatively bright lights in
said indicating circuit controlled by the position
of the elevator and adapted to increase the il
lumination of said index means.
the opposite poles of said switches seriatim to
said circuit opening means as the elevator ap
proaches the corresponding floors whereby the
elevator is stopped at ?oors corresponding to
closed manual switches; an indicating network
including means on the dispatch board in series 15
with said manual switches to indicate the closure
of said switches; and a multiple switch on said
dispatch board connected in parallel with said
manual switches in the elevator, whereby all of
said manual switches can be short circuited so 20
that the motive circuit will be opened when said
elevator approaches any one of said ?oors.
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