Year: 1898

page_text: improvements in Dalry Bo
We, EDWIN BLAKE SMITH, WILLIAM HENRY ASQUITH, and EDMUND ASQUITH,
of 2, John Dalton Street, Manchester, in the County of Lancaster, Mechanical
Engineers, do hereby declare the nature of this invention to be as follows:-
Our said invention relates to improvements in sliding doors and gates used for
the closing of the opening to hoists or other similar purposes.
Our improvement consists in a special form of catch for retaining the door
or gate in its lowest position when the cage itself is away from that particular
opening and also for retaining or securing the door or gate in its highest posi-
tion when the cage is at the aforesaid opening.
The action of our improved hoist door or gate is as follows, the door or gate
is made of wood, metal or other material and is arranged to slide up and down
in metal or wood runners, which are fixed to the edge of the corner guides or
posts which act as slides for the cage the door or gate itself being counter-
balanced by means of flexible bands, ropes or chains passing over pulleys placed
in position to give any requisite head room and with weights affixed at the other
end, the door or gate being slightly heavier than the counterbalanced weights, it.
is naturally always in its lowest position resting upon the floor or upon suitable
stops attached to the runners in which it slides.
Our method of operating our improved safety door or gate is as follows,
attached to the side of the well hole of hoist we have fixed by any convenient
means a casting or plate upon which is mounted a rocking lever pivoted at its
centre and connected at each end to a bored tube sliding in suitable boss or
sleeve, the ends of which are connected to the lever being securely attached to
same, at the outer ends of aforesaid tubes we insert two round rods connected to
same by pins working in slots in the tube and having inclined heads projecting
into the runner guiding the door or gate and which are held outwards from the
tube by means of light springs placed preferably inside the tube, these may
however be placed outside. These rods sliding inside the tube are so arranged
that the bottom rod will hold the door or gate in its lowest position and the
top rod holds the door or gate in its highest position when arranged for working.
Upon the bottom tube at the end in which the bottom rod slides is affixed a
collar and between the collar and the boss in which the tube slides we place a
spring intended to keep the bottom rod projecting into the runner or slide to the
door and to keep the top rod withdrawn from same. At the end of the bottom
tube or sleeve which is connected to rocking lever we prolong or
have connected an arm or lever which projects into the slide upon
which the cage itself works and fitted if necessary with a light roller for avoid-
ing friction. The cage being provided with a curved plate at the top and
bottom for striking the aforesaid arm when opposite to it.
The operation of working our improved safety doors or gates is as follows: it
is assumed that the cage is approaching any given floor, with the door or gate

page_text: down and securely held there by the operation of the spring between the collar
on the bottom tube, and the boss on the plate or casting, which keeps the rod
projected into the runner and on to the top of the door or gate; this prevents
anyone from entering or falling into the well hole. When the cage approaches
the floor with which we are dealing, the plates attached to the side of the cage,
strike the lever which projects into the cage runner and so forces the bottom
tube & rod backward out of the runner and the top tube and rod forward into
the runner. The person in charge of the cage now raises the door or gate verti-
cally and it is enabled to pass the top rod by striking on the inclined surface
of same, which forces it against the light spring into the top tube until the
door or gate has passed, immediately the door or gate has passed, the light
spring forces the top rod into the runner and so supports the door or gate, where
it is held so long as the cage remains at that floor, immediately the cage leaves
that floor the reverse action takes place, the strong spring on the bottom tube
forces it back again into the runner and draws the top rod and tube away from
same, allowing the door by its own weight to fall to its normal position, it
being enable to pass the bottom rod projecting into the runner by a like opera-
tion to that which enables it to pass the top one when the same was projecting
into the runner.
Dated 18th day of March 1898
EDWIN BLAKE SMITH,
WILLIAM HENRY ASQUITH,
EDMUND ASQUITH.
Improvements in Safety Doors and Gates to Hoists.
We, EDWIN BLAKE SMITH, WILLIAM HENRY ASQUITH, and EDMUND ASQUITHI,
all of 2, John Dalton Street, Manchester, in the County of Lancaster, Mechanical
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 said invention relates to improvements in sliding doors and gates used for
the closing of the openings to hoists or other similar purposes.
Of the drawings sent along with this specification Fig. 1 is a front view and
Fig. 2 a plan of a gate shown as applied for the closing of an opening to a hoist.
Fig. 3 is an elevation and Fig. 4 a sectional plan of our improved catch drawn to
an enlarged scale to show the working of the mechanicsm.
The catch mechanicsm see Figs. 3 & 4 consists of a base plate K on which
a lever A is pivoted, the ends of lever A are connected to two sliding sleeves B
& B1 which work in bosses, cast on the base plate K. The aforesaid sliding
sleeves B & B 1 are controlled by a spring C on the bottom sleeve, each sliding
sleeve B & B 1 is hollow and inside the same two bolts D & D 1 with bevelled
faces slide, these bolts being also controlled by springs E & E1. Connected to
the bottom bolt B is a bent arm F carrying at its outer end a bowl G, this
mechanicsm is fixed to the hoist frame or wall in the position as shown by Fig. 1.
The gate made of wood iron or other suitable material, is almost balanced by
means of weights H connected to top of gate by cords passing over guide
pulleys J.
The action of our improved arrangement is as follows:-assuming that the
hoist cage which unlocks the mechanicsin is approaching the floor at which the

page_text: gate is stationed in its lowest position being locked there by means of the bottom
bolt which protrudes over the top of gate the bolt being kept in that position
by the springs (& F, the spring (also keeping the bowl G projecting into the
runner of the hoist and in such a position that a tappet attached to the cage
can strike it and press it inwards overcoming the spring C, this is effected when
the cage reaches the floor, the bolt D is withdrawn from the top of the gate and
at the same time by means of the lever A the sleeve B1 and bolt D1 are forced
out.
The almost balanced gate is then lifted by the hand in its course pushing
back the bolt D1 and compressing the spring E1 but immediately the gate has
passed the bolt 1) 1 is shot back again under the gate and retains it in its highest
position so long as the hoist cage remains at that floor, but when it departs the
Spring C withdraws the sleeve B1 and bolt D1 and allows the gate to fall gently
into its original lowest position and be kept there as before stated by the bottom
bolt D.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
1. In a catch or lock the combination of a plate to which is affixed a rocking
lever connected to two sliding sleevs having bolts working in the same, the bolts
being controlled by two light springs and the whole being controlled by a
strong spring working on the bottom sleeve which spring is acted upon by a bow!
movable by means of a tappet on the cage substantially as described herein before
and illustrated by drawings herewith.
2. In a safety gate the combination of a balanced gate working over guide
pulleys with a catch for locking the gate in its lowest position when the hoist
is away from the floor at which the gate is placed and also for retaining the gate
in its highest position if necessary when the cage is at the floor at which the gate
is placed, all as substantially described hereinbefore and illustrated by drawings
herewith.
3. A sliding hoist gate and lock working substantially as described and illus-
trated herewith.
Total thi Watanth
Dagomhar 1898
EDWIN BLAKE SMITH.
WILLIAM HENRY ASQUITH.
EDMUND ASQUITH.