Automatic Gate for Protecting Wellholes of Lifts.
Year: 1888

page_text: Date of Application, 17th Sept., 1888
Complete Specification Left, 15th July, 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
Automatic Gate for Protecting Wellholes of Lifts.
JOSEPH THOMPSON PICKERING Globe Works, Stockton on Tees, County of Durham
Engineer EDWARD WILLIAM SANT, Globe Works, Stockton on Tees County of
Durham, Engineer do hereby declare the nature of this invention to be as follows:-
This improvement consists of a self-opening & self-closing gate actuated by the
cage in such a manner that accidents through persons falling down wellholes are
prevented.
The raising & lowering of the cage causes the gate to be lifted & lowered by
means of winding pulleys placed above the gate & to which the gate is hung by
suitable chains or cords. The pulleys are worked by means of a lever giving a rotating
motion to them whereby the gate is opened & closed. The lever has a cam like action
through contact with suitable rollers placed on cage. These rollers are put in & out
of gear with a hand lever thus changing their position & allowing the cage to pass
without working the gate.
Dated this Fifteenth day of September 1888.
JOSEPH THOMPSON PICKERING.
EDWARD WILLIAM SANT.
COMPLETE SPECIFICATION.
Automatic Gate for Protecting Wellholes of Lifts.
JOSEPH THOMPSON PICKERING Globe Works, Stockton on Tees, County of Durham,
Engineer EDWARD WILLIAM SANT, Globe Works Stockton on Tees County of
Durham, 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 Improvements in the method of opening and closing
gates in connection with Lifts. The vertical motion of the cage or platform being
utilised to work the gates automatically. This is accomplished by means of rollers
As the cage
projecting from one side of the cage to which they are attached.
travels the rollers come in contact with a revolving lever or cam causing it to partially
revolve. The motion so obtained is transmitted to a winding pulley or chain wheel
and by suitable means to be hereinafter described is made to open and close the
gates.
The arrangement can be applied in various ways and made to work automatically,
sliding, folding or hinged gates or doors working in vertical or horizontal positions.
The accompanying Drawings show the arrangement in connection with a cage
lift having double gates opening vertically Figure 1 is an end elevation and Figure 2
a front elevation of part of a lift on which the gates are shewn open. Figures 3
and 4 are similar views with the gates closed-A represents the cage, and B B the
guide posts, C. C are rollers fixed to the side of the cage A. D is a lever or cam
made fast to, and working concentric with the spindle E and having grooves on
one side for the rollers C. C to run in. F is a chain wheel fixed to the spindle E
and connected by an endless chain to the smaller chain wheel G which together
with the pulleys H. H is keyed to the spindle J. The pulleys H. H have cords
coiled on them, two of the cords K. K hold the bottom gate L in suspension and
two cords M. M pass over the pulleys N. N and are connected to the top gate O.
By this arrangement the suspended gates are in equilibrium and balance each other
in any position.

page_text: The combined action of the parts is as follows:-
When the cage is ascending or descending one of the rollers C. C enters one end
of the groove in the lever D causing it to rotate until the opposite end is brought
into mesh with the second roller. The lever in rotating carries with it the Spindle E
and chain wheel F. and the motion is conducted by the endless chain to the chain
wheel G and pulleys H. H, the effect of which is to open the gates.
Further movement of the cage up or down causes the action to be reversed, the
grooved lever is made to rotate in the opposite direction until its normal position is
reached and the gates are closed.
The foregoing description is for double gates but the arrangement is equally
applicable to single gates in which case a balance weight is substituted for the second
gate when required.
The gates in closing can be made to lock themselves by means of a latch
applied to the periphery of the wheel F. The latch is put into action by a
spring or weighted lever and is released by the cage as it approaches the gates.
The gate opening arrangement can be thrown out of gear by fixing the rollers C. C.
to the cage in such a manner that lateral movement can be given to them, controlled
by suitable means from the inside of the cage. The rollers can thereby be moved
sufficiently apart to work clear of the lever D, so that the cage is made to pass the
gates without opening them.
Having thus described the nature of our invention and the manner of performing
the same, we would remark that we do not limit ourselves to the precise details
herein given as they may be varied and modified without departing from the main
feature of our invention; we would also state that we make no claim to well known
parts of the mechanism which are shewn to illustrate the mode applied to our
improvements, but what we desire to be secured to us is, —-
First The application to lifts of the rollers C C acting in conjunction with the
lever D, in combination with the necessary chain wheels, chains, pulleys and cords
substantially as and for the purposes hereinbefore described.
Second-The combination and arrangement of the several and respective parts
together forming our improvements in the construction of Lift Gates as and for
the purposes hereinbefore described and shewn on the drawings.
Dated this
T
1000
GEO. DOWNING,
8, Quality Court, Chancery Lane, W.C., Agent for Applicants.