Improvements in Safety Appliances for the Doors of Hoist Wells.
Year: 1887

page_text: Date of Application, 28th Dec., 1887
Complete Specification Left, 27th Sept., 1888
Complete Specification Accepted, 16th Nov., 188
Improvements in Safety Appliances for the Doors of Hoist Wells.
We JOHN BARKER JAMES BARKER and THOMAS BARKER all of Park Street Iron
Works Oldham in the County of Lancaster Engineers do hereby declare the nature
of said Invention for IMPROVEMENTS IN SAFETY APPLIANCES FOR THE DOORS OF
HOIST WELLS to be as follows:-
Our invention relates to improvements in safety appliances for the doors of hoist
wells and the principal object of our improvements is to provide simple and reliable
means for preventing the opening of the door or doors except at the proper moment
when the cage is opposite the floor and for insuring the closing of the door or doors
when the cage leaves the floor.
We will describe our Invention first as applied to a hoist well fitted with sliding or
sash doors. In this case we employ at each floor a stationary bracket secured say to
the sash box at a suitable height above the floor level. In this bracket are supported
a spindle and a bolt both of which are free to be moved horizontally but are connected
together in such manner that when the spindle is moved in one direction the bolt
moves in the opposite direction: on the sash weight is pivoted a catch and on the hoist
cage is a cam or tappet arranged to strike the end of the spindle and move it horizontally
whether the cage be ascending or descending. A spring or equivalent is employed to
return the spindle to its normal position after the cam or tappet on the cage has
moved away.
The action of the safety appliance constructed and arranged as above indicated is
as follows:
The spring acting on the spindle and bolt keeps the latter engaging the hoist door
until the cage reaches the floor when the cam or tappet acting on the spindle forces it
outward and simultaneously withdraws the bolt from the door. The attendant then
raises the sliding door and as the sash weight descends the pivoted catch thereon in
passing is moved aside by the projecting end of the spindle but then falls back and is
latched beneath it so that the sliding door is held up and cannot be lowered until
the cage moves away from the floor. Then as the can leaves the end of the spindle
the spring withdraws the projecting end and releases the sash weight catch thereby
allowing the sliding door to fall by gravitation and close the well.
.
Di 217

page_text: When the door is down the spring shoots the bolt and locks the door which cannot
bo raised until the cage returns.
In applying our Invention to a hoist well fitted with folding doors we propose
instead of having the bolt in the same bracket as the sliding spindle to employ an
ordinary latch or equivalent placed preferably at the top of the doors and connected to
the sliding spindle by a cord or equivalent. The doors are connected by cords or
equivalents passing over pulleys or guides to a weight which is arranged to slide in a
sash box and at the proper time to close the doors against the pressure or force exerted
by springs which otherwise hold it open. A catch is pivoted to the sash weight as
before but is set to act in the reverse way that is to support the weight instead of to
hold it down as in the previous case.
When the cam or tappet on the cage comes against and moves the spindle the cord
connected to the latter operates the latch to unlock the doors the attendant then pushes
the doors open thereby raising the weight the catch on which in passing upward moves
aside and is then caught by the projecting end of the spindle whereby the weight is
held пр until the cage moves away and the cam or tappet thereon leaves the end of
the spindle and a spring causes the latter to resume its normal position. Then the
catch being released the weight falls and closes the doors against the resistance of their
springs the latch locking the doors in position as described.
Dated this 27th day of December 1887.

page_text: Improvements in Safety Appliances for the Doors of Hoist Wells.
We, JOHN BARKER, JAMES BARKER, and THOMAS BARKER, all of Park Street Iron
Works, Oldham, in the County of Lancaster Engineers, 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 relates to improvements in safety appliances for the doors of hoist
wells and the principal object of our improvements is to provide simple and reliable
means for preventing the opening of the door or doors except at the proper moment
when the cage is opposite the floor and for insuring the closing of the door or doors
when the cage leaves the floor.
We will describe our Invention first as applied to a hoist well fitted with sliding or
sash doors. In this case we employ at each floor a stationary bracket secured say to
the sash box at a suitable height above the floor level. In this bracket are supported
a spindle and a bolt both of which are free to be moved horizontally but are connected
together in such manner that when the spindle is moved in one direction the bolt
moves in the opposite direction; on the sash weight is pivoted a catch and on the hoist
cage is a cam or tappet arranged to strike the end of the spindle and move it horizon-
tally whether the cage be ascending or descending. A spring or equivalent is employed
to return the spindle to its normal position after the cam or tappet on the cage has
moved away.
In applying our Invention to a hoist well fitted with folding doors we propose
instead of having the bolt in the same bracket as the sliding spindle to employ an
ordinary latch or equivalent placed preferably at the top of the doors and connected to
the sliding spindle by a cord or equivalent. The doors are connected by cords or
equivalents passing over pulleys or guides to a weight which is arranged to slide in a
sash box and at the proper time to close the doors against the pressure or force exerted
by springs which otherwise hold it open. A catch is pivoted to the sash weight as
before but is set to act in the reverso way that is to support the weight instead of to
hold it down as in the previous case.
And in order that our Invention may be fully understood and readily carried into
effect I will describe the accompanying seven sheets of Drawings reference being had
to the figures and letters marked thereon.
Fig. 1 is a front elevation partly in section Fig. 2 is a sectional plan of part of a
hoist well fitted with our improved safety appliance for the well doors. Fig. 3 is a
side sectional elevation of the same showing a well door open and Fig. 4 is a similar
view with the door closed and Figs. 5, 6 and 7 are three views on an enlarged scale
of parts of the same.
Fig. 8 is a front view. Fig. 9 a sectional plan and Figs. 10 and 11 side sectional
elevations of a hoist well fitted with folding doors to which our improvements are
applied.
Similar letters refer to similar parts throughout the several views.

page_text: Referring first to Figs. 1 to 7.—
a represents the hoist well, a¹ one opening to the cage in the wall a² this opening
being protected by a sliding door c; d the floor or landing place and e a portion of
the cage through which passes a chain e' for controlling the driving gear from the
cage. These parts are of any convenient construction and form no portion of our
improvements.
For our safety appliance we employ on each floor at a suitable height a stationary
bracket secured preferably to the sash box of the sliding door c or to one side of
the opening a mounted in this bracket is a spindle g and a bolt h the two being
connected by a swivel piece i pivoted in the centre to a pin f¹ secured on the
bracket f.
The hoist door c is suspended as usual by bands or equivalents the ends of which
are secured to pulleys on a shaft c³ which is supported and free to turn in
brackets a secured to the sash frame or walls a².
The door is nearly balanced by a counterpoise or sash weight which is
suspended by a band or equivalent which passes over a guide pulley and
is secured to a pulley c fixed on the shaft ein such a way as that when the door c is
raised by the attendant the bands c¹ are wound on the pulleys c² while the band e¹ is
unwound from the pulley c and the weight lowered. On the weight is pivoted a
catch and on the door e is pivoted a catch k and fixed on the cage e is a cam or
tappet which is arranged to act upon the spindle g and move it back horizontally
against the resistance of a spring g' whether the cage is ascending or descending.
The action of the safety appliance constructed and arranged as above indicated is as
follows:-
g
The spring acting on the spindle g by means of the swivel connecting piece i
keeps the bolt engaging and so locking the hoist door c until the cage e reaches the
floor or landing place when the cam or tappet acting on the spindle y forces it
back or outward and simultaneously withdraws the bolt from the door. The
attendant then raises the sliding door c and as the sash weight; descends the pivoted
catch thereon in passing is moved aside by the projecting end of the spindle g but
then falls back and is latched beneath it as shown best in Fig. 3 so that the sliding
door c is held up and cannot be lowered until the cage e moves away from the floor.
Then as the cam or tappet leaves the end of the spindle g the spring g' withdraws
the projecting end and releases the sash weight catch thereby allowing the sliding
door c to fall by gravitation and close the well as shown best in Fig. 4.
When the
door c is down the spring g' shoots the bolt and so locks the door which cannot be
raised until the cage e returns.
Referring now to Figs. 8 to 11 in which designate a pair of folding doors
which close the opening to the hoist well a in place of a single sliding door c as in
the previous arrangement. To the spindle g is attached a chain or equivalent m which
passes over guide pulleys m and is connected to two spring catches or hooks n which
fit into catch plates not shown secured one upon each door b. The doors bb are
connected by a cord or equivalent c¹ passing over pulleys c to a sash weight and a
catch is pivoted to the sash weight as in the previous arrangement but is in this
case however arranged to act in the reverse way that is to say to support the weight
when the doors are open instead of to hold the weight down as before described.
A light spring o is employed on each door to retain it in position when open and
also a pneumatic check cylinder p, see Fig. 10 the piston of which is attached to the
weight to prevent the doors slamming.
The folding doors bare kept normally closed by the spring catches n with the
sash weight suspended as shown in Figure 11 and they can only be opened when the
cam or tappet on the cage e comes against and moves the spindle forward into
the position shown in Fig. 1 so that the chain m being thus pulled down withdraws
the catches n from their respective catchplates on the doors and the latter can
then be opened by exerting sufficient power to lift the sash weight j. As the weight)
is thus raised the catch thereon in passing upward moves aside the projecting end
of the spindle g and is then caught by it whereby the weight is held up until the

page_text: cage e moves away and the cam or tappet thereon leaves the end of the spindle g
and the spring y causes the latter to resume its normal position. The catch ¹ being
released the weight falls and closes the doors bb against the resistance of the
springs o the doors being latched by the catches n as before mentioned.
By both of our improved arrangements as described the cage can pass and repass
all the floors without actuating the doors but the latter can only be opened when
the bottom of the cage is level with the floor or thereabouts and the cam or tappet Z
has operated the spindle g and withdrawn the bolt or catch as described.
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. In a safety appliance for the doors of a hoist well, the combination with a cam
or tappet on the cage, of a spindle and a bolt or their equivalents carried in a fixed
bracket and arranged to automatically lock and unlock the doors substantially as and
for the purposes herein described and as illustrated by the Drawings annexed.
2. The combination with a cam or tappet on the hoist cage, of the spindle g
with its spring g' the bolt connected to said spindle by the swivel piece i said
parts operating in conjunction with the pivoted catch on the sash weight and
the pivoted catch on the door all substantially as herein described with reference
to Figs. 1 to 7.
3. The combination with a cam or tappet on the hoist cage, of the spindle g
connected to spring catches for latching the folding doors of a hoist well and a
pivoted catch on the sash weight for closing the doors said catch engaging the
spindle and holding the doors open until by the movement of the cage the cam
or tappet thereon releases the spindle g substantially as herein described with
reference to Figs. 8 to 11.
+. The several combinations arrangements and constructions of parts embodying
our improvements in safety appliances for the doors of hoist wells substantially as
and for the purposes herein described and as shown.
Dated this 26th day of September 1888.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent.