Year: 1895

page_text: Date of Application, 10th Dec., 1895-Accepted, 11th Jan.,
1896
A communication from abroad by OTIS BROTHERS & COMPANY, of 38 Park
Row, New York, in the United States of America, Manufacturers.
We OTIS ELEVATOR COMPANY LIMITED of 4 Queen Victoria Street in the
City of London do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
Where the control devices of elevators are operated by the usual hand rope the
car will generally be caused to ascend by pulling the hand rope from a central
position downward, to descend by pulling the hand rope from a central position
upward, and it is brought to a stop by moving the rope in one direction or the
other to a central position. It has proved to be difficult where the cars are run at
a high speed and also when the valves are large and difficult to shift to carry the
rope while the car is running exactly to the point required to cause the car to stop
its movement. In order to overcome this difficulty I so construct the gear or
devices operated by the hand rope to shift the control device as to lock the control
device in its central position and while so locked permit a limited movement of the
hand rope so that after the attendant has moved the hand rope to carry the control
device to its central position a further movement of the said hand rope will have
no further effect upon the position of the control device.
The intermediate gear for effecting this result may be constructed in different
ways, a preferable construction being illustrated in the accompanying drawings in
which:-
Figure 1 is sufficient of an elevator apparatus to illustrate the improvements.
Figure 2 is an enlarged view showing the gear between the hand rope and the
shifting bar.
Figure 3 is a section on the line 3-3, Figure 2.
Figure 4 shows a modification.
The cage X, is connected by flexible suspensories x, with the winding drum Y,
driven by a suitable motor Z: an electric motor being shown provided with a
control switch C, with which is connected a shifting bar B.
The usual hand rope 8, suspended within the well passes around the pulley S,
and through the cage X as usual.
The shifter bar B is made in the form of a rack gearing with a pinion L, and
between the pinion L and the pulley S, are interposed mutilated gear of such a
character as to rotate the pinion upon the movement of the pulley S to shift the
bar B to its central position and after the latter is brought to this position to lock
it in place while permitting the further movement of the pulley S.
The character of the gear may be varied so as to secure this result, but as shown
the pinion L is connected with a larger gear or pinion G having at one side a
projection H with a curved face adapted to engage the periphery of a projection C',
connected with or forming part of a gear R, arranged to engage the teeth of the
gear G, and connected or arranged to turn with the pulley S. As shown the gear R
and pulley S turn upon a shaft 6, and the gears L, G, turn upon a stud 5.
The gear R is shown as provided with five teeth, the central tooth 10 being the
longest and the terminal teeth 8, 9, being the shortest, and two of the teeth 12, 13,
on opposite sides of a central tooth 14 of the gear G have pointed ends, which

page_text: the
insures the proper engagement of the teeth of the gear K with those or
gear G.
When the control device and the pulley S are in their central or stopped
positions, the projection H will be directly below the shaft 6, and the projection C¹
will occupy a central position the machine being at rest, the current to the motor
broken and the brake U exerting its full power to arrest the motion of the
engine.
When the hand rope is pulled to turn the pulley S the control switch or device
is carried to one side, the motor fluid acts in one direction or the other and the
brake is raised, and the cage
put in motion.
When it is desired to stop, the hand rope is operated to carry the pulley S
towards its central position. The first movement is to turn the gear R, when
the engaging gear G and the shifting bar B is moved until the gear G reaches
the central position shown in Figure 2. In this position the mutilated gear R,
will leave the gear G, and the projection C' will be brought into engagement with
the curved face of the projection H, and the further movement of the control
device will be arrested and the said device will be locked in its place. This,
however, will not interfere with the further movement of the hand rope and the
pulley S in the same direction. It therefore follows that the operator is not
called upon to exercise any special care or nice manipulation in order to arrest
the movement of the hand rope at a particular point and that provided he moves
it sufficiently to bring the control device to a central position a further movement
in either direction is unrecorded.
When in order to start the operator moves the pulley S the control device will
be locked in position until the projection C begins to pass from the projection H
when the teeth 8, or 9, will be brought in contact with the tooth 14, and the
gear G will begin to turn to shift the control device. It will be seen that the
operation is the same moving the hand rope in either direction, except that
the control device is moved in one case to the right and in the other to the
left.
When the usual automatic stop motion is connected with the pulley S in the
ordinary manner the car can travel for a considerable distance against the full
effect of the brake before the shipper bar is shifted in a reverse direction to release
the brake.
Where a more direct connection is required the shipper bar B may be dispensed
with, the gears L, G, being secured to the stud 5, constituting part of the
rock-shaft of the control device.
In order to avoid the necessity of providing the gears R, G, with teeth of
different shapes, the face of the projection C', may coincide with the pitch line of
the teeth of the gear R, and the face of the projection H may coincide with the
pitch line of the teeth of the gear G, as shown in Figure 4.
The invention need not be limited to the precise construction and arrangement
of parts shown and described.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed (as communicated to
us by our foreign correspondents) we declare that what we claim is :-
1. The combination in an elevator apparatus of the hand rope, the control device,
and intermediate gear including inutilated gear arranged to permit a movement of
the band rope independent of the control device after the latter has been brought
to a central position, substantially as set forth.
2. The combination of the hand rope and pulley S, the control device and
intermediate gear including a mutilated gear R, having a projection C₁ and a
gear G having a projection H adapted to the projection C', substantially as set
forth.
3. The combination of a pulley S, to which the haud apparatus of an elevator is
connected and a mutilated gear R connected with said pulley, of a projection C¹

page_text: also connected with said pulley and a gear G connected with the control device
arranged to engage the gear R and provided with a projection H for engaging the
projection C, substantially as set forth.
4. The combination with the shifting pulley S and shifting bar B of an elevator
apparatus, of intermediate gear, for shifting and holding the bar and mutilated to
permit the pulley to move before and after shifting the bar and to lock the latter
in place during the movement of the pulley, substantially as described.
Dated the 10th day of December 1895.
PHILIP M. JUSTICE,
55 & 56 Chancery Lane, London, Chartered Patent Agent,
For the Applicants.