Improvements in Door Latches.
Year: 1891

page_text: Date of Application, 19th Dec., 1891
Complete Specification Left, 10th Sept., 1892-Accepted, 22nd Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Door Latches.
I, JOSEPH LILLY of No. 6 Hutton Street, Nechells, in the County of Warwick,
Art Metal Worker do hereby declare the nature of this invention to be as
follows:-
This invention relates to the arrangement and combination of two door handles
and a common door lift and drop latch whereby the latch is operated by pulling
the handle on one side of the door or by pushing the handle at the other side.
The handles are of the bow form usually adopted for door handles and sometimes
combined with a lever having at one end a thumb plate for depressing the lever to
raise a door latch at the opposite side of the door and at the other end a curved
tapering end forming a hook by which to lift the lever and so raise the latch at the
side of the door upon which the lift and drop latch is fitted.
ends
I fit the handles to the door, one at each side, by plates in which the
upper
of the handles are pivoted. In this respect both handles are alike but the lower
end of one of them has a bar projecting therefrom to pass through an opening in
the door in such a position that the door latch rests upon the said bar and rises or
falls correspondingly with any change in its inclination.
The handle from which the bar projects is counterpoised so as to drop close to
the door leaving the latch free to drop into position for fastening and the handle
upon being pulled out from the door brings the said bar to the horizontal position
thus raising the latch resting thereon and allowing the door to be pulled open.
The handle at the other side of the door is made to engage the bar projecting from
the other handle by means of a hook formed upon the bar passed into an L shaped
slot formed at the lower end of the handle. Thus the movement of one handle
actuates the other so that pushing the projecting handle at one side of the door
or pulling the handle at the other side of the door produces the same change in
the inclination of the bar and operates the latch for unfastening the door which
is then opened by the push or pull which operated in the first place to raise
the latch.
Dated this 19th day of December 1891.
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Door Latches.
I, JOSEPH LILLY of No. 6 Hutton Street, Nechells in the County of Warwick
Art Metal Worker, 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 the arrangement and combination of two door handles
and a common door lift and drop latch whereby the latch is operated by pulling
the handle on one side of the door or by pushing the handle at the other side.
In the annexed sheet of illustrative drawings,
Figure 1 is a vertical section, Figure 2 a back elevation and Figure 3 a front
elevation of a door latch constructed according to this invention.
A bowed handle a, pivotted at its upper end to a fixing on the base plate c, is
bent at its lower part to an inclination at d and passes through the base plate c and
Price 8d

page_text: door e, a push knob
being secured by a set screw g to its outer end h. On the
inclined part d of the bar rests the door latch i pivotted by the pin 7 so that when
the handle a is pulled from the door it turns around its pivot m withdrawing the
inclined part d which raises the latch and releases it from its catch n and so allows
the door to open. When opening the door from the opposite side the handle is
pushed with the same result.
When the handle is released after operating the latch it is returned to its normal
position by its own weight its further motion being arrested by the inclined part d
of the bar striking against the plate c. A rose plate o is provided against which
the push handle strikes when operated. The return of the bar h to its normal
position permits the latch to slide down the incline d into its lowermost and
normal position ready for another operation.
It will thus be seen that the movement of one handle actuates the other so that
pushing the projecting handle at one side of the door or pulling the handle at the
other side of the door produces the same change in the inclination of the bar which
operates the latch for unfastening the door which is then opened by the push or
pull which operated in the first place to raise the latch.
Instead of pivotting the handle a as at m Figure 1 I sometimes rivet it to a
spring plate pas is clearly shown in Figure 4, or simply pass the fixing plate c
over its end and slightly rivet it over as shown in Figure 5.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is: :-
1. A door latch comprising a double handle pivotted at one end and having an
inclined part engaging with a falling latch so that on operating the said handle
from either side of the door the latch is released substantially as described.
2. The arrangement and construction of a door latch substantially as described
with reference to the drawings hereunto annexed.
Dated this 10th day of September 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, Agents.