AN IMPROVED GATE STOP
Year: 1880

page_text: LETTERS PATENT to Sydney John Bury, Gentleman, of Whetstone, in the
County of Middlesex, for an Invention of "AN IMPROVED GATE STOP."
COMPLETE SPECIFICATION filed by the said Sydney John Bury at the
Office of the Commissioners of Patents on the 4th June 1880.
SYDNEY JOHN BURY, Gentleman, of Whetstone, in the County of Middlesex.
"AN IMPROVED GATE STOP."
This Invention has for its object improvements in stops for double gates or doors,
so that when the gate is open there shall be no projection above the surface of the
road way between the gates.
I place midway between the gate posts, beneath the road-way, a box which has
its upper surface level with the road, so that the gates when closed partially rest
upon the upper surface of the box.
This box which I make of iron or other suitable material contains in or near its
centre a lever, the gudgeon or fulcrum of which rests on two slotted bearings cast
on the sides of the box. The ends of this lever fit loosely into apertures cut in
two sliding plates, which are capable of moving vertically in grooves in the side
of the box.
The lever has its fulcrum as near one sliding plate as possible, as represented
in Figure 2, consequently a slight depression of this plate will cause a greater
elevation of the other. The box is covered by a plate in which are two apertures,
the one circular, the other rectangular. The circular aperture receives the bolt
which is attached to one door, and consequently when the bolt is shut the
corresponding sliding plate is depressed, while the other plate is raised and
projecting above the surface of the road forms a stop to both gates.
The gate which has the bolt attached to it also has a projection from its edge
on the side remote from the "stop." This projection overlaps the other gate, so
that this gate is fastened between the stop on one side, and the projecting catch on
the other.
In some cases I prefer to make use of the following modification :-I make a
bolt having a coil or other spring attached to the back of it, so that the spring
presses the bolt downwards upon a grooved metal curve let into the road way,
As the gate is closed the bolt follows the course of the groove until it comes

page_text: vertically over the circular office above described. By the action of the spring
the bolt is shot into the hole depressing the corresponding end of the lever, and
consequently raising the projecting stop and fastening the gates.
In other cases I prefer to attach to the foot of the gate nearest the jamb a wheel,
having its vertical plane at right angles to the plane of the gate. In the upper
plate of the box I substitute for the bolt-hole a slot of sufficient size to allow a
portion of the wheel to fit into it. When the gate is closed the wheel comes over
the slot, drops partly into it, and depresses the corresponding end of the lever, and
raises the projecting stop.
In the accompanying Drawings Fig. 1 is a front view partially in section, Fig. 2
is a side view partially in section of the arrangement for using an ordinary bolt
at the side of a gate or door. bis the bolt pin; c, the fulcrum of the lever; d, the
sliding bar for the bolt; e, sliding bar for stop; Figure 3 represents the front view
of spring bolt; Figures 4 and 5 represent the front and side, and shew arrangements
for using the wheel.
SYDNEY JOHN BURY. (L.S.)