Year: 1897

page_text: Date of Application, 16th Mar., 1897-Accepted, 5th June, 1897
I, JOHN SEISER MUCKLE, of 1722 Pine Street, in the City and County of
Philadelphia, State of Pennsylvania, one of the United States of America,
Mechanical Engineer, 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 :-
The object of my invention is to provide means for locking the landing doors of
elevator wells when the operating mechanism is free, and to lock the said mechanism
when either of the doors is open. My invention is especially adapted for use
in connection with elevator cars having lever mechanism for stopping and starting,
in lieu of either wheels, or ropes, or rods, passing through the car.
In the accompanying drawings,
Figure 1, is a vertical sectional view of part of an elevator car and well, the
section being taken on the line 1-1, Figure 2;
Figure 2, is a vertical sectional view, the section being taken on the line 2-2,
Figure 1;
Figure 3, is a perspective diagram;
Figure 4, is an enlarged view of one end of the hand lever; and
Figure 5, is a perspective diagram of a modification.
A are the walls of an elevator well having doorways a for the different landing
floors a¹; B is an elevator car, D is a hand lever having a hand-hold d and this
lever is pivoted at d¹ to the car, and, in the arrangement illustrated, has two
wheels around which passes the rope or chain connected to the controlling
mechanism in the well, so that when the lever is moved to a central position the
car will remain stationary, when moved to one side of the centre the mechanism
will be so shifted that the elevating mechanism will lift the car and when moved
to the opposite side of the same, the mechanism will be so shifted as to allow the
car to descend.
1 pivot the hand hold dat d³ to the lever D so that it will have a motion in the
direction of the arrow, Figure 1. At the rear of the handle is a lug d' which, when
the operator moves the lever to the centre position to stop the car, enters a notch e
in a segment E secured to the car.
The pivoted hand-hold d is connected to one arm of a bell crank lever G by a
rod G. The lever G is pivoted to bearings on the underside of the car and its
other arm is connected to an arm of a lever G³ arranged on a vertical pivot and an
arm of this lever is connected to the locking slide H which is mounted in bearings
on the underside of the car, and on its outward movement presses against a spring
catch I, which locks the door A' in its closed position. The further movement of
the slide H releases the door so that the operator can open it. On the slide is a
flange i with which engages a locking lever J hung at to the side of the elevator
well, one arm of this lever is controlled by the door while the other arm is
weighted.
The moment the door is released and opened by the operator after bringing the
car to a stop, the locking lever is free and swings in front of the flange i of the
slide H, preventing the slide from being operated until the door is again closed, on
the closing of the door a projection thereon strikes the locking lever J, moves it
away from the slide so that the slide is released and the operator can then move
D

page_text: the hand-hold clear of the notch and the lever can then be moved in either
direction.
It will be seen that the car cannot move when the elevator door is open and the
door cannot be operated except when the elevator car is at the landing and at
rest, so that the operator can release the door by the movement of the mechanism
described above.
In Figure 5, I have shewn a slight modification in which the levers G, G' are
directly connected together and the lever G2 is connected to the slide by a rod g.
It will be understood that the arrangement of parts can be modified to accord with
different elevator constructions.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. The combination with an elevator car, of a lever connected to controlling
mechanism, a portion of the said lever being independently moveable, door
releasing means on the car connected to the independently moveable portion of
the lever, a landing door, and a catch therefor, adapted to be operated by the
releasing means on the car, substantially as herein before described.
2. The combination of an elevator car, a landing door, a slide, a pivoted
controlling lever mounted on the car, having a pivoted hand-hold connected to
the slide, a notched segment fixed in the car, the pivoted hand-hold having a
lug adapted to a notch in the segment, so that the lever must be opposite the
notch in the segment before the slide can be operated to release the door, and
means for locking the hand-hold to the segment while the door is open,
substantially as herein before described.
3. The combination of the elevator well, the door, an elevator car, a pivoted
lever D connected to the controlling mechanism, and having a pivoted hand-
hold d, a bell-crank lever G on a horizontal pivot, a rod connecting the bell-crank
lever with the hand-hold d, a second bell-crank lever G2 arranged on a vertical
pivot and connected to the bell-crank lever G, a slide H connected to the said
lever G2, and a notched segment fixed in the car, the pivoted hand-hold d having a
lug adapted to rest in the notch of the segment so that the lever cannot be moved
in either direction until the hand-hold is turned on its pivot, substantially as
herein before described.
Dated this 16th day of March 1897.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.