Certain Improvements in Spring Latches for Doors.
Year: 1892

page_text: Date of Application, 14th Sept., 1892
Complete Specification Left, 13th June, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
Certain Improvements in Spring Latches for Doors.
I, ELIJAH SMITH, of 32, Temple Bar, Willenhall, Staffordshire, Rim and
Night Latch Manufacturer, do hereby declare the nature of this invention to be as
follows:--
.
This invention consists of the herein described improvements in those cheap
kinds of spring latches for doors which are made without a casing the latch proper
and the spring for operating it being exposed to view and carried by a plate
adapted for fixing to the door.
In carrying out my invention the latch proper or bolt (hereinafter referred to as
the latch proper) is arranged to slide to and fro end wise in two bridge pieces or
guides which are made of sheet metal bent round the front and sides of the latch
proper and fixed to the plate in the well known manner by small projecting parts
on the bridge pieces or guides which pass through holes in the plate and are
rivetted over. One of these bridge pieces or guides forms also a bearing for the
"follow
which operates the latch proper and through which the knob spindle
passes; that is to say, the follow is situated between this bridge piece or guide
and the plate the circular ends of the follow bearing in corresponding holes
in the plate and in the bridge piece or guide respectively. The latch proper
has an elongated hole through which the follow passes and this hole is made of the
proper length to admit of the required movement of the latch proper the follow
forming a stop to prevent the latch proper moving too far in either direction. The
inner end of the latch proper is formed as a shoulder for the follow to act upon
when the knob is turned in either direction. At this end of the latch proper is a
spring for forcing the latch proper forward. The other said bridge piece or guide
is fixed to the plate near the edge thereof and supports the fore part of the latch
proper.
Dated this 12th day of September 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.
COMPLETE
SPECIFICATION.
Certain Improvements in Spring Latches for Doors.
I, ELIJAH SMITH of No. 32 Temple Bar Willenhall Staffordshire Latch
Manufacturer 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 :-
In order that the nature of my invention may be more clearly understood, I will
describe it in reference to the accompanying drawings and the letters of reference
marked thereon.
The same
letters occuring in different figures indicate
corresponding parts.
Fig. 1 is a plan of the latch plate upon which the different parts are fixed.
a, a, a, a, being holes for screws for fixing to door. is the hole through which
the follow passes.
c is the hole for fixing back follower. d is for riviting spring.
e, e, are holes for riviting the follow staple through and f,f, are the same for front
staple. 9, 9, 9, 9, 9, are holes for fixing staples and spring for small slide bolt.
This latch plate is made of sheet iron and varnished.
Figs. 2 and 3 are front view and section respectively of the latch as it appears
when fixed on a door. A is the latch plate. B is the staple that is cast in iron

page_text: of the shape shown, the raised part on the fore-end is to assist the bolt C into the
staple if the door should be slammed to without turning the knob. C is the bolt
of the latch shown on drawings to be in position as far as the follow D will allow
it to be pushed into the staple B.
Figs. 4, 5 and 6 give respectively a front, back and side view of the said bolt C.
E in Figs. 4 and 5 is a hole in the bolt in which the follow D works. D the follow
aforesaid is shown fixed on Figs. 2 and 3, and Figs. 7 and 8 are top and side views
of the same.
The circular parts of this follow work in the hole b, Fig. 1 and the
hole E Figs. 4 and 5 and the ears G Figs. 7 and 8 project on the sides of the bolt
and when a spindle which is fixed in the hole H is turned in either direction the
ears G move the position of the bolt. I, Fig. 2 and 3 is the back follower and is
fixed on the latch plate by being countersunk and secured with the rivit, K, and
with the assistance of the spring J, has the effect of keeping the bolt C in the
position shown on Figs. 2 & 3 until it is moved with a spindle and when the said
spindle is loosed the said back follower and spring forces the bolt back again in
the position shown. L in Figs. 2 & 3 is a staple made in the form shown on Fig. 9
and afterwards turned on the dotted lines to the shape of Fig. 10. M Fig. 9 is
the hole shown with the follow D in position on Figs. 2 & 3, this staple has the
effect of keeping the bolt and follow in their proper positions. The projections N
on Figs. 9 & 10 are rivited in the holes, e, e, Fig. 1, to hold the staple in its place.
O, Figs. 2 & 3 is a plain staple secured as in the case of N. P & Q, Fig. 2 is the
ordinary slide bolt shown in its position on the latch. R Fig. 2 are the screws
required for fixing.
Fig. 11 is a drawing of the old stile of latch which I have shown so that it can
be compared with the other drawings, the dotted lines show the position the bolt
would be required to be turned up to to be released from the catch
The drawings have been drawn to scale but I do not wish to bind myself to the
particular size or shape shown as I shall wish to make the latch larger or smaller
according to the requirements.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The making of the follow staple in the way described herein and shown on
the drawings having the effect of keeping the bolt & follow in their respective
positions.
2. The construction of the bolt and its combination with the follow as shown
Dated this Thalfth
T
1000
Dated this Thalfth • day
Witness:
WINIFRED LAW.
1808.
ELIJAH SMITH.
X