An Improved Door Chain and Latch Combined.
Year: 1889

page_text: Date of Application, 4th Nov., 1889
Complete Specification Left, 5th Feb., 1890-Accepted, 5th Apr., 1890
PROVISIONAL SPECIFICATION.
An Improved Door Chain and Latch Combined.
I, ERNEST JOHN CHRISTIE, of 54 Salisbury Place, Akroydon, Halifax, in the
County of York, Carpet Designer, do hereby declare the nature of this invention to be
as follows
:-
This invention has for it's object, the better security of property, and opening of
doors, at various distances.
In carrying out my invention,. I cause the slot or guide, in the box or holder, to
turn downwards, at the end farthest from the opening of the door.
I, attach one or more buttons to chain.
Tintroduce the buttons, into slot or guide, by means of two, or more apertures in
the top of the box or holder.
Instead of securing the fast, or doorpost, end of chain, to a staple, I cause it to be
attached to a combined holder and latch, working on a pin or pivot.
I construct the aforesaid box or holder, so as to receive, and hold, the said latch,
when required.
Dated this Croand I of N 1000
COMPLETE SPECIFICATION.
An Improved Door Chain and Latch Combined.
I, ERNEST JOHN CHRISTIE, of 54 Salisbury Place, Akroydon, Halifax in the County
of York, Designer, 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 has for it's object, the better protection of property, and opening of
doors at various distances. I cause the slot or guide, in the box or holder, to turn
downwards, at the end farthest from the opening of the door; I attach, one or more
button, or buttons to chain. When more than one button is attached, the said buttons
may vary in size, if desired. I introduce the aforesaid button or buttons, into slot,
through two or more apertures, in the top of the box or holder, the diameters of such
apertures, to be determined, by the size of the button or buttons employed. Instead
of securing the fast or doorpost end of chain to a staple, I cause it to be attached to a
combined holder and latch, working on a pin or pivot. I construct the aforesaid box
or holder, so as to receive and hold the said latch when required.
To enable my invention to be properly understood, I will now proceed to describe
it, by aid of the accompanying drawing.
Fig. 1. represents, latch and chain secured.
Fig. 2. represents, latch and chain when off.
Fig. 3. represents, cross section.
Fig. 4. represents, plan.
Button B when introduced into slot A through the aperture B, allows door to open
half the length of chain. Button C₁ (which may be larger than B¹), when introduced
into slot A, through aperture C, (which may be larger in diameter than B), allows
door to open to full length of chain; if button ", be now passed along slot A to D,
the door will be nearly closed. If the latch E, which, joined to the holder F, works
on the pin or pivot G, be now turned into the receiver H, in box or holder, the door
will be secured whilst at the same time the eccentric or lateral movement of the head
or slide I, to latch-end of slot K, automatically tightens the chain, owing to holder F,
being so attached to latch E, that the pin or pivot G, is nearer to aforesaid latch-end

page_text: of slot K, than it is to the other end, thereby giving a double security at one and the
same time, as in Fig. 1.
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. Making two or more apertures; in the top of the box or holder, which apertures
may vary in diameter.
2. Causing the slot or guide in the box or holder, aforesaid, to turn downwards, at
the end farthest from the opening of the door, substantially as hereinbefore shewn in
the accompanying drawing.
3. A combined chain holder and latch, working on a pin or pivot, the said pin or
pivot to be so placed, as to cause that portion of the before mentioned chain holder
and latch, termed the holder, to tighten the chain with. an eccentric movement, the
said chain being permanently attached, by means of a head or slide working in a
small slot in the holder, before mentioned in this paragraph, substantially as herein-
before shewn in the accompanying drawing.
4. Construction of the box or holder, before mentioned in paragraphs 1 and 2, so
as to receive and hold the before mentioned latch, substantially as hereinbefore shewn
in the accompanying drawing.
5. Attaching one or more button or buttons to the chain portion of the chain,,
holder, and latch, before mentioned in paragraph 3, which said buttons, may vary in
size, substantially as herein before mentioned in accompanying drawing.
Dated this Fourth day of February 1890.
ERNEST JOHN CHRISTIE.