Improvements in Doors for the Landing Stages of Elevators or Hoists
Year: 1891

page_text: Date of Application, 28th July, 1891
Complete Specification Left, 27th Apr., 1392-Accepted, 28th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Doors for the Landing Stages of Elevators or
Hoists.
I, JOHN MCKILLOP of 228 Main Street, Anderston, Glasgow, in the County
of Lanark, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the doors provided at the landing stages of elevators
or hoists for safety purposes and the improvements have for their object to so
construct such doors that when the elevator or hoist arrives at any landing at
which it is desired to stop, the doors are automatically opened and when the
elevator or hoist departs from the said landing the doors are automatically
closed.
With these objects the doors are made in two halves meeting at the centre
of the opening into the well of the hoist and each half door is centred or pivoted
arc of 90°.
vertically so as to be capable of swinging or moving through an
At the part where it is pivoted each half door has a screw feather or groove
made on it, a part of the said feather or groove at or near the centre of the
door measuring vertically being made parallel with the edge of the door the
feather or groove sweeping from the said flat part so as to make a quarter turn
both upwards and downwards. In conjunction with each feather or groove there
is provided a bolt which is carried upon the elevator or hoist and is capable of
being projected and withdrawn as desired. When withdrawn the elevator or hoist
either in ascending or in descending passes the doors at any landing at which it
is not desired to stop without opening these doors but when the bolt is projected
so as to act upon the feather or groove the elevator or hoist either in ascending
or in descending automatically opens the doors, these when the elevator departs
from the landing being again closed either by the bolt or by ordinary door
springs or the like.
Dated this Twenty-seventh day of July 1891.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Doors for the Landing Stages of Elevators or
Hoists.
I, JOHN MCKILLOP of 228 Main Street, Anderston Glasgow, in the County
of Lanark, 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 :-
This invention relates to the doors provided at the landing stages of elevators or
hoists for safety purposes and the improvements have for their object to so
construct such doors that when the elevator or hoist arrives at any landing at
which it is desired to stop, the doors are automatically opened and when the
elevator or hoist departs from the said landing the doors are automatically
closed.
The invention is illustrated by the several figures on the accompanying drawings
of which Figure 1 is a vertical section and Figure 2 a horizontal section of a hoist
and landing shewing the door open, Figures 3 and 4 being like figures shewing the

page_text: In carrying out the invention the door A is made in halves meeting at the centre
of the opening into the well B of the hoist and each half door is centred or pivoted
vertically in the roof and floor of the landing so as to be capable of swinging or
moving through an arc of 90°. Along the vertical axis on which it swings each
half door A has a projecting screw feather C made on it or it may have a corre-
spondingly formed groove a part from C¹ to C2 of the said feather or groove being
made parallel with the edge of the door the feather or groove sweeping from the
flat parts CC² so as to make a quarter turn both upwards and downwards. In
conjunction with each feather or groove there is provided a bolt D which is carried
in brackets E secured on the sides of the elevator or hoist F, the inner ends of the
bolts being each connected to a lever G centred at its lower end on the side of the
elevator and attached at its upper end by a crank H to a shaft I extending across
the top of the elevator. On the shaft a hand lever J, is keyed and by operating
the said lever the bolts D are projected and withdrawn. When withdrawn as at
Figures 3 and 4 the elevator or hoist F both in ascending and in descending passes
the doors A at any landing at which it is not desired to stop without opening these
doors but when the bolts are projected as at Figures 1 and 2 so as to act upon the
screwed part of the feather or groove C the elevator or hoist F in ascending or in
descending automatically opens the doors A. In conjunction with each such door
a spring K carried on a vertical bar L or otherwise in the landing is provided
which springs when the elevator departs from the landing again automatically
closes the doors.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:―
1. For the landing stages of hoists or clevators an automatically opening and
closing door constructed and operating substantially as described with reference
to the accompanying drawings.
2. In a door for the landing stages of boists or elevators the combination of half
door sections A each furnished vertically on its swinging axis with a feather or
groove bolts operated from the interior of the elevator to automatically open said
half sections as desired and springs to close them substantially as described with
reference to the drawings annexed.
Dated this Twenty-sixth day of April 1892.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.