Improvements in Electric Elevators.
Year: 1888

page_text: Date of Application, 17th Apr., 1888
Specification Accepted, 25th May, 1888
COMPLETE SPECIFICATION.
Improvements in Electric Elevators.
We, JOHN KEESE HALLOCK, Attorney at Law, residing at Erie, in the County of
Erie and State of Pennsylvania, and GEORGE CANFIELD BLICKENSDERFER, Gentleman,
residing at Stamford, in the County of Fairfield and State of Connecticut, United
States of America, 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 :—
Our Invention has relation to electrically propelled elevator cars or cages, for
buildings; and it has for its object, simplicity of construction of parts, whereby an
economical, effective and durable form of elevator is provided, wherein safety catches
or devices, and appurtenances, usually accompanying the same, are dispensed with.
Our Invention, accordingly consists of the combination, construction and arrange-
ment of parts as hereinafter described and claimed, having reference particularly, to
a fixed screw-shaft or column, a revolving nut or gear engaging with the screw-
shaft, an elevator car or cage suspended from or supported by said nut or gear and
an electric motor on the cage, for rotating said nut or gear in reverse directions, for
raising or lowering the car or cage, E.
Reference being had to the accompanying Drawings, wherein figure 1, is a
sectional elevation, showing the application of my improvements to a screw form of
elevator.
Figure 2, an enlarged sectional view, partly in elevation of the motor, car and
screw-rod.
Figure 3, a plan of reversing switch for the motor and
Figure 4, a longitudinal section, showing modification.
A, represents the car or cage and, B, the screw-rod or column of a screw form of
elevator, which coluum may be constructed or provided for, as desired, but we prefer

page_text: a single central screw rod, as shown in figure 1, which is fixed or immovable and
extends from the top to the bottom of well, C, and has a revolving gear or screw
nut, D, in engagement therewith, by means of which the car is raised or lowered.
The nut, D, shown in figures 1 and 2, is provided with an annular groove or
bearing, d, in or on which is swiveled a frame, E, secured to the car, A. This
frame, E, serves as a support for the field magnets, f, of an electric motor, F, the
armature shaft, f¹, of which, is tubular, surrounds the screw-rod, B, and is firmly
secured to or forms an integral part or extension of nut, D. Upon the armature
shaft, f, is the commutator, y, as usual and the brushes, h, h, therefor, are supported
upon the field magnet frame, E, in the usual, or any other suitable manner, as
indicated.
From such described construction, it will be noted, that the electric motor, inter-
venes between the car and the nut upon the screw rod, that the nut is a part of the
armature-shaft, and that the nut or armature shaft, supports the field magnets, their
frame and the car, A, so that a rotation of the armature shaft and nut, in reverse
directions, raises or lowers the car as desired.
From brushes, h, h, lead divided or split wires or connections, 1, 1, to a reversing
switch, K, located in car, A, and from switch, K, lead wires, 2, 2, including a cut-
out switch, L, as desired, to a battery or generator &; said wires, 2, 2, preferably,
leading to binding posts, 3, 3; located half way up the well, C, as indicated for well
known reasons.
By suitably operating the reversing switch, K, the direction of rotation of the
armature is reversed as desired, for changing the direction of travel of car, A.
Instead of using the reversing switch, K, the brushes, h, h, may be rotated to
change the polarity of the armature in the well known way, by means of mechanical
gearing, k, k, in engagement with a rotating brush holder, as indicated in figure 2, a
pointer, l, and a dial, L, being employed in connection with said gearing for posi-
iively controlling the movement of the brushes to effect the necessary or required
changes of travel of the car.
Instead of using a central screw rod, as shown in figure 1, corner or other
suitably located screw teeth racks engaging with gearing, operated by the armature
shaft, of the motor, may be employed and suitable counter-balancing weights may
be employed to lessen the frictional wear on nut, D, in a manner
practiced.
as heretofore
It will be noted, from the foregoing, that as the screw-shaft or column is fixed
and the nut or gear, D, only, is rotated, the speed of the rotation and consequently
the speed of travel, of the car, may therefore, be as fast as desired and the slow
motion heretofore incident, to screw-shaft elevators, necessitated by the revolution of
the screw column or shaft, is avoided.
It will be further noted, that we prefer to use no part of the column or shaft or
the fixtures in the well, as conductors, leading to the car motor, but employ separate
conductors therefor, one end of each of which is secured to fixed or line conductors, at a
point about half way up the well, and these conductors rise and fall with the car, as it
inoves, hence there is less liability of short circuiting, and of danger from their use
and they are readily placed in position and are correspondingly removable, when
repairs are necessary, either for the conductors themselves, or for the other parts of
the elevator.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare, that what we
claim is :-
1. The combination of a fixed screw-shaft or column, a revolving nut or gear, in
engagement with said shaft, a cage or car supported by or suspended from said gear
and electric motor and circuit connections, for effecting the rotation of said gear, to
raise and lower said cage, substantially as set forth.
2. The combination of a fixed screw-shaft or column, a revolving nut or gear, in

page_text: engagement with said shaft and affixed to an electric motor armature shaft, a car or
cage, supported by said armature shaft, field magnets, for said armature, located upon
said cage, circuit connections, for said motor and devices for reversing the directions
of rotation of the armature shaft and revolving nut, substantially as set forth.
3. The combination of an elevator car an electric motor secured to the car, having
an armature and shaft therefor, separate from the car and provided with a screw-nut
or gear, which engages with a fixed screw-shaft, substantially as set forth.
4. In combination with a fixed screw-rod, an armature shaft, having a threaded
nut, engaging with the screw-rod, a field magnet frame, swiveled to said nut, and
an elevator car, attached to said frame, substantially as set forth.
5. In combination with a fixed screw-rod, an elevator car, suspended or supported
by a revolving nut or gear, on said shaft, an electric motor on the car, for revolving
said nut, and separate and inovable conductors, leading from the car, to terminals of
fixed conductors located at or abont half way up the clevator well, substantially as
set forth.
6. The combination of a fixed screw-rod, an elevator car, an electric motor on the
car, having a tubular armature shaft gear connections, between said armature shaft
and the screw-rod, and devices for reversing the direction of rotation of the armature
for changing the direction of travel of the car, substantially as set forth.
7. The combination of a fixed screw-rod, an elevator car, an electric motor field
magnet frame, secured to said car and having a bearing or support on the motor
armature shaft which, is separate from the car and a gear connection between said
armature shaft and the screw-rod, substantially as set forth.
S. The combination with an elevator car and a fixed screw-rod, of an electric
motor on said car, having a hollow or tubular armature shaft, for engagement with
said screw-rod, substantially as set forth.
9. The combination with an elevator car and a fixed screw rod, an electric motor,
on said car, the armature shaft of which is in engagement with said screw-rod, as and
for the purpose set forth.
10. In combination with a traveling car on a fixed screw-rod, an electric motor,
the armature shaft of which engages directly, with said screw-rod, as and for the
purpose set forth.
11. The combination of a fixed screw-rod, a revolving gear on said rod, a car or
cage, suspended or supported by said gear and a motor, for rotating said gear to raiso
and lower the car, substantially as set forth.
12. In combination with a fixed screw shaft, of an elevator car and its operating
devices, an electric motor having a hollow armature shaft, in engagement with said
devices, substantially as set forth.
13. In combination with an elevator car, an electric motor, having its field magnets
and frame secured to the car and its armature shaft journaled in said frame and
supported directly, upon the elevating mechanism, substantially as set forth.
14. The combination of a fixed screw shaft, an elevator car, an electric motor, a
rotating gear on the motor armature shaft, in engagement with the screw shaft, a
generator or battery, and reversing and cut out switches, substantially as set forth.
15. The combination of a fixed screw shaft, an elevator car or cage, an electric
motor therefor, having tubular armature shaft, in engagement with said screw shaft
and reversing and cut out switches, located in said car, substantially as and for the
purpose set forth.
16. The combination with an elevator car, an electric motor for actuating said car,
flexible circuit connections or conductors, 2-2, for the motor, connected at one end to
the car and at the other, to fixed terminals of a line of conductors, and a cut out
switch and devices for reversing the motor included in said circuit connection,
substantially as shown and described.
17. The combination with an elevator car, an electric motor for propelling the car,
devices for controlling the movement of and reversing the direction of rotation of the
motor armature shaft, and flexible electric conductors, 2-2, in circuit with said motor

page_text: and secured to and hanging pendant from the car and the fixed ends or terminals of
a line or working circuit, substantially as set forth.
18. The combination of an elevator car, having an actuating or propelling electric
motor, brushes for the commutator of the motor, a dial and indicator and gearing,
interposed between said indicator and brushes, substantially as and for the purpose set
forth.
Dated this 17th day of April 1888.
JOHN KEESE HALLOCK.
GEORGE CANFIELD BLICKENSDERFER.
By Jensen & Son,
77, Chancery Lane, London, W.C.,
Patent Agents.