Improvements in Automatic Safety Hoists.
Year: 1892

page_text: Date of Application, 31st Dec., 1892
Complete Specification Left. 24th Oct.. 1893-Accepted, 25th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Automatic Safety Hoists.
I FRANCIS VIRTUE of 254 Wincolmlee, Kingston-upon-Hull in the County of
York, Mill Manager, do hereby declare the nature of this invention to be as
follows:
I employ gates or doors at the openings to the well of the hoist in each room,
such gates being hinged to a vertical rod passing upwards to the top of the room.
Upon each gate in or near its hinged end is a runner or antifriction bowl; upon the
front at each side of the cage of the hoist are cam plates of such form and position that
as they come in contact with the bowls upon the aforesaid hinged gates, they push
open the said gates, and as they pass they allow them to be closed by weights,
springs or their equivalents.
The springs may be arranged under each floor, and chains or cords attached from
them, which pass over guide pulleys and are secured to the vertical rods upon which
the said gates hinge or pivot, so that as the hoist ascends or descends, it auto-
matically opens and closes the gates of the gates or doors at each landing as it
arrives and leaves.
The gates or doors are cranked near the pivot or hinge, so as to clear the cams.
Dated this Thirtieth day of December 1892.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Automatic Safety Hoists.
I FRANCIS VIRTUE of 254 Wincolmlee, Kingston-upon-Hull, in the County of
York, Mill Manager, 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 :-
DESCRIPTION OF DRAWINGS.
Fig. 1. is a front elevation of hoist with my invention applied.
Fig. 2. is a sectional elevation.
Fig. 3. is a sectional plan showing cam plates operating on gates.
I employ gates or doors A at the first second and higher floors at the openings B
to the well C of the hoist, in each room such gates being each hinged to a vertical
rod D. passing upwards to the top of the respective rooms. Upon each gate A in
or near its hinged end E is a runner or antifriction bowl F; upon the front at
each side of the cage G of the hoist, are cam plates H of such form and position
that they come in contact with the bowls F upon the aforesaid hinged gates, they
push open the said gates and as they pass they allow them to be closed by weights,
springs J or their equivalents. The springs J may be arranged preferably in tubes
or covers K under each floor, and chains or cords L attached from them which pass
over guide pulleys M and are secured to the vertical rods D upon which the said gates
hinge or pivot, so that as the hoist ascends or descends it automatically opens and
closes the gates or doors at each landing as it arrives and leaves.
The gates or doors are cranked near the pivot or hinge at T. (see Fig. 3) so as to
clear the cam plates.

page_text: The hinged gates or doors may also be fixed in the basement and to any number
of floors required, but when there is not sufficient room for hinged doors at the
basement, the bottom gate or door A' may be a sliding one carried by independant
chains L' which pass over pulleys N to a rod P carried by engaging hooks R at the
cage top; when the cage is at the bottom, the bottom gate is suspended above by
the said hooks R and rod P, immediately the cage ascends, on nearing the first
floor, projecting arms S take the rod P from the hooks R the gate or door having
descended to the bottom remains there until the cage descends and reaches the first
floor above the basement when its hooks or projections come in contact with the
rod taking it from the arms S at the end of the chain carrying the sliding gate and
raises it.
A projection U is formed at or near the top of each vertical rod D, and a stop W
is fixed under each floor, so that as the cage ascends or descends and the gates or
doors A close, the projections come in contact with the stops and being mounted on
the vertical rods to which the gates are fixed or pivotted, prevents the said gates
from turning too much inwards.
The doors may be made any length required to close up the entrance to the
hoist.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The use and employment of cam plates H upon the sides of the cage G of
hoists, which automatically open and close the hinged gates A at their respective
floors as the cage arrives and departs as and for the purposes described.
2. The combination of the cam plates H upon the cage G, hinged gates A with
antifriction bowls F, rods D, with or without projections U, stop W, weights or
springs J and chain or cord L, as and for the purposes substantially as shown and
described.
Dated this Twants third day of October 1902
JOHN E. WALSH,
Crossley Street, Halifax, and Saville Street, Hull,
Patent Agent for the Applicant.