Improvements in Alarum Clocks.
Year: 1896

page_text: Date of Application, 30th June, 1896-Accepted, 12th Sept., 1896
COMPLETE SPECIFICATION.
Improvements in Alarum Clocks.
I ALBERT JOSEPH PRIESTLEY of 41 Brook Street, Ilkley near Leeds in the
County of York, Watchmaker, 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 relates to further improvements in alarum clocks. To be worked
in combination with Letters Patent granted to me, and dated April 16, 1896
No. 8038 entitled, Improved Alarum Clock with Variable Indicator.
The novelty of this invention relates to a lifting apparatus connected with the
alarum stop work on the back plate of an ordinary alarum clock, where I employ
a horizontal locking bar. This bar slides backwards and forwards in slot holes
from two suitable projections in the aforesaid back plate.
A pin is inserted into the last but one projection or tooth of the star piece in the
aforesaid, stop work (although only four projections are shewn in my drawings
I do not limit myself to four as any number may be used). When the alarum is
working the star piece containing the said pin revolves, and comes in contact with
the projection of the horizontal locking bar, and forces it back home. Connected
to the triangular end of this locking bar is a projection, forming part of a bracket
or hollow body. This hollow body or bracket slides up and down on a vertical
rod, containing a spiral spring. On the back of the clock case is fixed a metallic
plate. From the top of this plate to a suitable distance downward a grove is cut
through from which projects, a portion of the above mentioned bracket or hollow
body. Part of this bracket contains two wings, left and right, handed, and the end
of these wings are turned up portions of the said bracket, and in the centre is
formed a finger plate. These wings as described are constructed for the purpose
of holding cards, containing the figure or illustration of a "policeman,"
warning or any other suitable object or advertisement. When the spiral spring is
put in compression the card or figure holder stands about the centre of the clock
case back as shewn.
motto,
In order that this part of my invention may be fully understood I will describe
the same by making reference to my drawings in which
Fig. 1 shews elevation of back plate of an alarum clock.
Fig. 2 shews part of sectional elevation of the same, attached to the inside of
the back of the clock case.
Fig. 3 shews part elevation of the back of the clock case, with figure of
"policeman".reversed..
Fig. 1 f1 represents the finger piece of the alarum stop work. 9' shews the
star piece. Into the last but one projection or tooth of the star piece g 1, I insert
a pin represents the locking bar with projection at . k shews a hole in
the said bar into which the end of a spring is inserted. m² and m² are two
projections from the back plate el. These projections m¹ and m³ contain_slut
holes through which the horizontal locking bar slides, and when forced back by
the pin in the last move of the star piece g¹ the spring is put in compression
against the projection m². When the alarum spring is wound up the spring 1
expands, until the pin is forced against the projection m³ and holds the locking
bar in position for locking the projection n' Fig. 2.
The dotted lines o Fig. 3 shews where the clock case back is
insertion of the vertical rod p¹ containing a spiral spring g'.
cut away for the
At the top and

page_text: Figs. 2 and 3.
bottom of this grove o is fixed a strip of plate 1 and 23, Figs. 2 and 3, into
which the pivotted ends of the aforesaid rod p' are inserted. The said grove o is
covered by a metallic plate t. From the top of this plate to about the centre a
grove u is cut down sufficiently to allow the figure or card holder v', with ite
projection in Big. 2 to lock under the triangular point of the locking bar Fig. 2.
Fig. 3 shews the ends of the wings turned up for holding cards, figures and t..
like. is the finger plate for pressing or locking the spiral spring q' as shewn in
I will now describe the manner in which my invention is worked. The alarum
spring is first wound up. The spring j' is then at liberty to expand and forcing
the locking bar inwardly, so that the triangular point moves beyond the centre
of the plate el. The card holder v Figs. 2 and 3 is now pressed down, as shewn
at w, and the bracket with projection n' sliding on the triangular point of the
locking bar until the said bar slides back, and the bracket with projection n' has
passed the 'triangular point' Figs. 1 and 2. In pressing the card or figure holder v
down against the triangular point of the locking bar , the spring jis put in
compression, and now that the bracket with projection n has passed the triangular
point the locking bar rebounds again towards the centre of the plate e', and
holds the bracket with projection n down until the alarum has run down, which
forces the locking bar back home in the last move of the star piece g¹ by the
action of the pin in the alarum stop work. The spiral spring q¹ Figs. 2 and 3
which has been held in compression as shewn at wol is now released, and exp
itself until it reaches the top of the clock, when the figure of a "policeman, u.
any other suitable figure, warning or advertisement which the card holder & may
contain is brought prominiently into view above the case of the clock.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The use of a horizontal locking bar containing spring. Working in
connection with the alarum stop work, the motion of which is actuated by the
'insertion of a pin in the last but one projection or tooth of the star piece in the
said stop work,, the same acting on the projection of the horizontal locking bar
the triangular end of the same holding and releasing the action of the vertical
spiral spring.
2nd. The use of a vertical rod fixed in the back of the clock case containing
spiral spring, acting on a hollow body or bracket with projection for locking, and
containing finger plate and wings working through a groved metallic plate for the
insertion of cards, or any suitable illustrated figure, such as a "policeman"" or other
illustration, or printed advertisement.
3rd. The application and use of the aforesaid mechanism to any ordinary alarum
'clock.
Dated 26th day of June 1908
ALBERT JOSEPH PRIESTLEY.