Improvements in Bell Alarms for Doors, Tills, and the like.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Bell Alarms for Doors, Tills, and the like.
BENJAMIN RAY Watchmaker 64 Corporation Road Grimsby and JOSEPH
WELLS HARNESS Auctioneer 83 Corporation Road Grimsby do hereby declare
the nature of this invention to be as follows:-
A small wood or metal box containing movement driven by spring or weight
with hammers attached to give alarm on bell or bells. The movement is of the
following description :-
Medium size, two brass plates 3 inches long 1 inches wide and inch thick.
On the bottom plate are riveted four pillars tinch each in diameter screwed at the
top for small nut to secure top plate, making frame for movement the whole
of which is made fast to box with four brass feet for screws. There is a centre
spindle of movement coming through the plates inch each side and this is threaded
for attaching lever on either side. On this spindle is one driving spring, two cog
wheels and one ratchet wheel. One end of this spring is fixed to the spindle with
a book. The other end is made fast to the side pillar. One cog wheel on the
spindle is fast, the other loose, this latter being brought into action by means of a
ratchet wheel and pawl. The ratchet wheel is also fast on the spindle and the pawl
is riveted to arm of loose wheel. The fixed wheel is geared into a pinion on a pin
wheel spindle. The loose wheel is geared into pinion on spindle of intermediate cog
wheel. Intermediate cog wheel is geared into pinion on an escape wheel spindle.
The escape wheel is similar to that of an alarm clock and works on pallets
with hammer attached the hammer striking the bell. There is a second hammer
which is worked by the pin wheel and this is brought into action by the lever on
the centre spindle being caught with any movable substance such as doors tills etc.
On the moving of the lever the pin wheel hammer commences to strike the bell.
On being released this hammer becomes stationary and the pallet hammer is set in
motion.
Dated this Seventeenth day of December 1895.
Improvements in Bell Alarms for Doors, Tills, and the like.
We, BENJAMIN RAY, of 64, Corporation Road, Grimsby, Watchmaker, and
JOSEPH WELLS HARNESS, of 83, Corporation Road, Grimsby, Auctioneer, 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 :-
*
Our invention relates to an improved method of working alarm bells, the object

page_text: being to provide spring or weight mechanism of simple construction for the purpose
of operating alarm bells, and which may be employed to replace the ordinary electric
bell now greatly used, our improved bell being more reliable and efficient while it
does not require nearly the care or attention that is necessary to keep the ordinary
electric bell in good working condition.
In order that our invention may be fully understood, we will now proceed to
describe same with reference to the accompanying drawings in which
Fig. 1 is a side elevation of the case containing the mechanism, fitted with bell
ready for use, Fig. 2 being a plan of same.
Fig. 3 is a plan of a portion of the mechanism with the top plate removed, and
Fig. 4 is a side elevation of the operating mechanism, drawn to an enlarged
scale.
According to our invention, we provide a suitable case such as c fitted or furnished
at the top with a bell b, while through an opening in the side of same projects the
operating arm or lever l.
The operating mechanism or movement comprises two plates a, a, preferably of
brass, separated by pillars p preferably rivetted to the bottom plate and secured to
the top plate by small nuts, the whole forming a working frame for the movement
which is secured to the case by means of lugs such as ', .
The centre spindle s of the movement projects through the top plate a where it
is fitted with the operating arm or lever land upon this spindle is mounted the
driving spring g and two toothed wheels w, w', with the ratchet wheel w². One end
of the spring is fixed to the pillar p, while the other end is made fast to the central
spindle s. The cog wheel w is made fast to the said spindle s while the wheel w is
loose, this latter being brought into action by the ratchet wheel w². This ratchet
wheel is also made fast on the central spindles while the pawl d is rivetted to the
arm of the loose wheel w.
The fixed wheel w gears with pinion p¹ mounted on
spindles which also carries pin wheel p². The loose wheel w gears into pinion e
mounted on spindle s2 which also carries the intermediate cog wheel e', said wheel
in turn gearing with pinion e² of the escape wheel h which are both mounted on the
spindle ¹, said escape wheel being of similar construction to that employed in
ordinary alarm clocks and engages with the pallets t secured to the spindle t' and
'from which projects the striking rod r of the hammer . A second striking rod³
is also provided designed to be operated by the pin wheel p².
The operation of our improved bell is as follows:-
Upon the lever I being drawn down or depressed either by a cord, chain or the
like y, or by reason of any moving object such as a door or the like coming into
contact with the end of the said lever, the central-spindle s is revolved which partly
winds up the spring g, the fixed wheel w' also revolving and thereby operating the
pinion p and pin wheel p³, which latter engages with the spring arin or click of
the spindle, the said spindle, as each pin of the wheel passes the arm or click x,
partly revolves it and draws back the striking rod r³, subsequently releasing it as
the pin passes and allowing it to strike the bell. Upon the operating lever / being
then released the spindles immediately begins to revolve in the reverse direction by
reason of the spring g, the loose wheel w being also caused to revolve by the ratchet
wheel w², said wheel w operating the pinion e and intermediate wheel e', which in
turn gears with pinion of pallet wheel which operates the pallets t, and
consequently the pallet wheel striking rod r, meanwhile, the fixed wheel w¹ which
is now revolving in the reverse direction, also causes the pinion p' and pin wheel p
to revolve in a contrary direction to that in which they were formally travelling
and when moving in this direction the pins of the pin wheel p² harmlessly pass the
spring arm or click a without partly revolving the spindle ¹ which was hitherto the
case, and thus the second or pin wheel striking rod ³ is not operated until
the lever is again drawn or forced down.
Upon the top of the case a pivoted rod k is arranged which is furnished with an
arm projecting at right angles which, by pushing over the said rod k can be thrust
between the striking rods raud for preventing the bell being operated.

page_text: Although we have described our improved bell mechanism as designed to be
operated by means of a spring it is obvious that a weight might be employed for
this purpose.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved mechanism for working alarm bells, arranged and constructed
substantially as herein described and shown, and for the purposes specified.
2. In mechanism for operating alarm bells, the spring a mounted upon the
spindle s in combination with an operating arm or lever such as 1, loose wheel w,
ratchet wheel w³, intermediate wheel and pinions e¹, e and e², pallet wheel h,
pallets and pallet striking hammer r, the whole combined and arranged,
substantially as herein described and shown, and for the purposes specified.
3. In bell operating mechanism such as above claimed the arrangement of spring g
upon the spindle s in combination with an operating arm or lever such as l, a fixed
wheel w', pinion p¹, pin wheel p³, spring arm or click a, rocking spindler, and a
secondary or pin wheel striking rod 2, substantially as herein described and shown
and for the purposes specified.
Dated this 8th day of Santamber 1806
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.