An Improved Registering Mortice Lock.
Year: 1889

page_text: Date of Application, 11th Sept., 1889
Complete Specification Left, 11th July, 1890–Accepted, 11th Sept., 1890
PROVISIONAL SPECIFICATION.
An Improved Registering Mortice Lock.
I JOHN NEWNHAM of 3 Newcastle Place Clerkenwell Close Clerkenwell Middlesex
Machinist do hereby declare the nature of this invention to be as follows :—
An improved registering mortice lock having a single spring bolt actuated. by a
knob upon the inside of door and by a key upon the outside of door. The back plate
of lock is occupied by a V groove, paralel to which groove, are three or more studs,
upon which I mount my index wheels. The bolt works in this groove and travels the
distance prescribed to it by the length of a slot cut through the plate at the bottom
of groove through which slot the shaft of knob passes and is screwed through the
aforesaid bolt. Upon the surface of this bolt I center a spring pawl having a lateral
motion to the bolt and through the diaphragm of pawl the end of shaft previously
described passes, and controls its action, the pawl is so hung that when the bolt is
withdrawn by knob, it passes freely past index wheels.
In the flang of bolt, I cut my various counter wards, for the key to interlock, and
the end of pawl being superposed to the bolt, the key impings aagainst it simultaneous
with the action of key withdrawing the bolt the nose end of pawl enters the ratchet
wheel and causes it to rotate.
My index wheels are the ordinary Maltese wheels, the first being engraved with the
ten digits, as units, the second as tenths, and the thirds as hundreds, and so on as
may be desired, each wheel being so hung that the respective digit present itself
at an aperture in the front plate of lock, and can there be enumerated, but so
encased that it cannot be tampered with.
111111
L
1000
COMPLETE SPECIFICATION.
An Improved Registering Mortice Lock.
1 JOHN NEWNHAM 3 Newcastle Place Clerkenwell Close Clerkenwell Middlesex
Machinist 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 :-
An improved registering mortice lock, having a single spring bolt; actuated by a
knob upon the inside of door, and by a key upon the outside of door.
The back plate of lock is occupied by a V groove, parallel to which
or more studs, upon which I mount my index wheels.
groove, are three
The bolt works in this groove, and travels the distance prescribed to it by the
length of a slot cut through the bottom of plate at the bottom of groove, through
which slot the shaft of knob passes and is secured through the aforesaid bolt.
Upon the surface of this bolt I center a spring pawl having a lateral motion to the
bolt and through the diaphragm of the pawl the end of shaft passes and controls its
action. The pawl is so hung that when the bolt is withdrawn by the knob it passes
freely past the index wheels.
In the flange of bolt I cut my various contra wards for the key to interlock,
and the end of pawl being superposed to the bolt the key impinges against it
simultaneously with the action of key withdrawing the bolt the nose end of pawl
enters the ratchet wheel and causes it to rotate.
Over the section of bolt that carries the pawl I affix a plate as a shield to it,
upon which shield there are engraved the words 'Vacant' and 'Engaged' and when
the bolt is standing in its normal position the first of these words is read 'Vacant'

page_text: '
through an aperture in the front of lock; upon a person going into the lavatory or
room he moves the bolt longitudinally or as it were double locks and the word
Engaged' is presented to the aperture, as in conjunction with this lock. My index
wheels are of the ordinary Maltese wheels, the first being engraved with the ten digits
as units, the second as the tenths, the third as hundreds and so on as may be desired,
each wheel is so hung that the respective digit presents itself to an aperture in the
front plate of lock and are there enumerated being so encased that they cannot be
tampered with.
In the accompanying drawing wherein similar letters of reference indicate corre-
sponding parts.
Fig. 1 shews plan view of entire front of lock.
Fig. 2 shews interior of lock.
A is the bolt.
"
"
B is the spring pawl.
C are the indices.
"
"
D is the coil spring.
Fig. 3 sectional view bolt A
"
and knob.
Fig. 4 bolt A with pawl B attached.
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
First General construction as a registering lock.
Second Single bolt action actuated with coil spring.