Year: 1888

page_text: Date of Application, 6th June, 1888
Specification Accepted, 27th July, 1883
I, GEORGE ANSLOW of 33 Doctors Piece Willenhall in the County of Stafford,
Lock and 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
-
My invention consists first in making latches for House doors double handed, and
second in substituting a vertical action of the knob for withdrawing the bolt in lieu
of the ordinary horizontal or drawback action, which I effect in the following manner,
reference being made to the accompanying drawings, the same letters of reference to
the various parts being the same throughout
The tail of the latch bolt-A-Fig. 1-has a longitudinal arm- -B- -on one side
with a slot-C-therein which moves upon a guide stump-D-in the back plate of
the latch case, in or about the centre of which I employ a T shaped lover-E-
turning upon a pin F-the ends of the upper arms-G-G-of which work against
two vertical lips-H-H-the lower arm-I-having another arm-J-at a right
angle which passes through a semicircular slot-K-in the back plate of the latch
case.
Upon this right angle arm-J-I fix the knob at the back of the case, that is to
say on the side which is on the inner side of the door.
Immediately below this right angle arm-J-and in a central line with the same
I fix a pin-L-upon which the key of the latch revolves, and in turning it to either
-J-
the right or the left the bit is brought in contact with the right angle arm-
which causes the T shaped lever to turn upon the pin-F-and by virtue of either
of the upper arms being depressed thereby they press against either of the vertical
lips-H-H-and withdraws the bolt, the action of which I control by the use of a
double reined spring-M- or any other kind of spring I may hereafter find most
suitable.
This method of actuating the latch bolt may be applied to Rim locks, Mortice
locks and Hall door locks, but in the two former a follower through which the
spindle of the knobs pass will have to be used.

page_text: This follower-N-Fig 2 which may be employed at the extreme bottom end of
the locks will necessarily have two horns-0-0-between which the lower arm-I-
lies, and in turning the follower to either the right or left it acts precisely in the
same way as the bit of the key, but the bolt tail will have a longitudinal slot-P-
moving upon the pin-F-on which the lever-E-turns, the advantages gained by
this being twofold namely the simplification of construction and the exact equaliza-
tion of the action, the universal defect in all Rim and Mortice locks hitherto
constructed being that of the knobs turning further round on one side than on the
other, and in like manner the force or power required is also greater.
Fig. 2 merely shews the bottom end of Mortice lock broken, and from the
description given it will be obvious that the same applies to Rim locks also.
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 19
The lever action device for withdrawing the bolts of Latches, and the latch bolts
of Rim and Mortice locks substantially as herein described and illustrated by the
accompanying drawings.