IMPROVEMENTS IN LATCHES AND BOLTS FOR DOORS AND THE LIKE
Year: 1887

page_text: Date of Application, 26th Aug., 1887
Complete Left, 25th May, 1888
Complete Accepted, 22nd June, 1888
JOHN HOLT of Bankfield Radcliffe in the County of Lancaster Engineer, do
hereby declare the nature of said Invention for IMPROVEMENTS IN LATCHES AND
BOLTS FOR DOORS AND THE LIKE, to be as follows:-
The object of my Invention is to construct a latch and bolt combined so as to
dispense with an independent bolt.
In applying my improved latch to a door I employ the usual handle on each side of
the door on the spindle of the handles I secure a plate of metal which forms the lever
for operating the latch which latter may be formed of an elbow shape the latch is,
pivoted at the corner to the door or other frame. The lever on the handle spindle
may be shaped so that by turning the handle in one direction one end of the lever
comes in contact with the vertical portion of the elbow latch lever and raises the latch
the act of releasing the handle allows the latch to fall by its own weight.
The latch can also be raised by turning the handle in the other direction in this
case the lower portion of the lever on the spindle comes against the vertical part of
the elbow lever and so raises the latch. The lever on the spindle and the latch lever
are preferably so constructed that they come together and form a dead stop for the
latch when it is down quite independent of the carrier latch upon which the latch does
not need to rest.
In order to make a combined latch and lock 1 pivot to the elbow lever a catch with
a hooked end which when the latch is down can be hooked over a pin secured to the
lever on the handle spindle or vice versü; when this is done the handle cannot be
turned or the latch raised until the catch has been unhooked. If desired a spring or
equivalent may be used to prevent the catch hooking itself on to the pin.
I propose to pass the handle spindle through a plate secured to the door the plate
being provided with a stud or hole where the latch lever is to be pivoted.
1007

page_text: Improvements in Latches.and Bolts for Doors and the like.
I JOHN HOLT of Bankfield, Radcliffe, in the County of Lancaster, 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:
The object of my Invention is to construct a latch and bolt combined so as to
dispense with an independent bolt.
In applying my improved latch to a door I employ the usual handle on each side of
the door, on the spindle of the handles I secure a plate of metal which forms the lever
for operating the latch which latter may be formed of an elbow shape the latch is
pivoted at the corner to the door or other frame. The lever on the handle spindle
may be shaped so that by turning the handle in one direction one end of the lever
comes in contact with the vertical portion of the elbow latch lever and raises the latch
the act of releasing the bandle allows the latch to fall by its own weight.
The latch can also be raised by turning the handle in the other direction in this case
the lower portion of the lever on the spindle comes against the vertical part of the
elbow lever and so raises the latch. The lever on the spindle and the latch lever
are preferably so constructed that they come together and form a dead stop for
the fatch when it is down quite independent of the carrier latch upon which the latch
does not need to rest.
In order to make a combined latch and lock I pivot to the elbow lever a catch with
a hooked ond which when the latch is down can be hooked over a pin secured to the
lever on the handle spindle or vice versa; when this is done the handle cannot bo
turned or the latch raised until the catch has been unhooked. If desired a spring or
equivalent may be used to prevent the catch hooking itself on to the pin.
I propose to pass the handle spindle through a plate secured to the door the plate
being provided with a stud or hole where the latch lever is to be pivoted.
And in order that my Invention may be fully understood and readily carried into
effect I will describe the accompanying Sheet of Drawings reference being had to the
figures and letters marked thereon.
Figures 1, 2, and 3 are three views of a combined latch and bolt or lock made
according to my Invention.
In these views.-a designates the plate or frame which is fixed on the door and
through which passes the spindle on which are fixed two handles c one on either side
of the door and on the spindle is also fixed an L lever d the lower edge of which is
bevelled. The elbow lever or latch lever e is pivoted to the plate a at e¹ and one end
lies in the carrier latch which is secured to the door post or other fixed part while
near the other end of the latch lever e is pivoted a catch or bolt g which is free to be
turned on its pivot by means of the thumb piece or wing g'.
When the catch g is in the position shown in Fig. 1 it effectually locks the latch
lever e and prevents any movement of the said lever and also any movement of the

page_text: handles c spindle b and the L lever d but when the catchy is moved into the position
shown in Figs. 2 and 3 the laich lever e may be raised clear of the carrier latch by
turning a handle b either to the right as shown in Fig. 2 or to the left as shown in
Fig. 3. The form of the levers and e and the weight of the lever e always return
both levers to their normal positions as shown in Fig. 1 the moment the handle bis
released thus latching the door which can then be locked by turning up the catch g.
Instead of operating the catch g by hand only it may be turned backward and forward
as required by means of a key or one handle might be dispensed with and a key
employed to turn the spindle. Again instead of the form of catch herein shown
any suitable means for locking the latch lever e may be employed such as a hook and
a pin or a pin only.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is-
1. The combination with the latch lever e of the lever d arranged and operating
substantially as herein set forth.
2.The combination with the handle spindle and a lever fixed thereon such as the
Llever d, of a pivoted elbow latch lever substantially of the form herein shown and
described and a pivoted catch or bolt for locking the same as and for the purposes
specified.
3. The construction combination and arrangement of parts embodying my
improvements in latches and bolts for doors and the like substantially as herein
described with reference to the Drawings annexed.
Dated the M... 1000
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicant.