IMPROVEMENTS IN CALL PROVISIONAL SPECIFICATION
Year: 1875

page_text: LETTERS PATENT to Henry Brooks, the younger, of the Firm of
H. Brooks & Company, of Cumberland Market, Regent's Park,
the Hampstead Road, and Lyme Street, Camden Town, all in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN CALL
PROVISIONAL SPECIFICATION left by the said Henry Brooks at the
Office of the Commissioners of Patents, with his Petition, on the
9th February 1875.
I, HENRY BROOKS, the younger, of the Firm of H. Brooks &
Company, of Cumberland Market, Regent's Park, the Hampstead Road,
and Lyme Street, Camden Town, all in the County of Middlesex, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
CALL OR SIGNAL BELL APPARATUS," to be as follows:-
The improvements relate to that class of call or signal bell apparatus
in which the means of operating the clapper, when the clapper is
allowed to act, is by the unwinding of a barrel spring released for

page_text: the purpose when and for the time desired, and the object of the
improvements is to enable the spring to be readily wound up from
the top or outer part of the apparatus, so that the apparatus may be
conveniently applied to or so as to form part of a letter weight or
other surface. For this purpose the main spring is wound up by one
end of that spring being attached to the axis of a pinion, the teeth
of which are taken into by the teeth of another pinion applied on a
tubular spindle, and this spindle passes up through a bracket which
supports the bell, and outside the bell it has applied to it a milled
disc or wheel by which its rotation is effected. A ratchet as usual
prevents the uncoiling of the spring as it is wound up. The main
wheel when released sets in motion by the action of the spring a
ratchet or toothed wheel, the ratchets or teeth of which act on pallets
applied to the axis of the clapper to set it operating on the bell for the
required call or signal. A spring acts as a check to the hammer, and
the hammer is released when and for the time the call or signalling is
required by pressing on a rod passing down the tubular spindle referred
to. The details may be varied.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Brooks in the Great Seal Patent Office
on the 9th August 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BROOKS, the younger, of the Firm of H. Brooks and Company, of
Cumberland Market, Regent's Park, the Hampstead Road, and Lyme
Street, Camden Town, all in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Ninth day of February, in the year
of our Lord One thousand eight hundred and seventy-five, in the thirty-
eigth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Henry Brooks, Her special license
that I, the said Henry Brooks, my executors, administrators, and
assigns, or such others as I, the said Henry Brooks, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and

page_text: vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
CALL OR SIGNAL BELL APPARATUS," upon the condition (amongst others)
that I, the said Henry Brooks, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Henry Brooks, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :-
The improvements relate to that class of call or signal bell apparatus
in which the means of operating the clapper, when the clapper is
allowed to act, is by the unwinding of a barrel spring released for
the purpose when and for the time desired, and the object of the
improvements is to enable the spring to be readily wound up from
the top or outer part of the apparatus, so that the apparatus may be
conveniently applied to or so as to form part of a letter weight or
other surface. For this purpose the main spring is wound up by one
end of that spring being attached to the axis of a pinion, the teeth
of which are taken into by the teeth of another pinion applied on a
tubular spindle, and this spindle passes up through a bracket which
supports the bell, and outside the bell it has applied to it a milled
disc or wheel by which its rotation is effected. A ratchet as usual
prevents the uncoiling of the spring as it is wound up. The main
wheel when released sets in motion, by the action of the spring, a
ratchet or toothed wheel, the ratchets or teeth of which act on pallets
applied to the axis of the clapper to set it operating on the bell for the
required call or signal. A. spring acts as a check to the hammer, and
the hammer is released when and for the time the call or signalling
is required by pressing on a rod passing down the tubular spindle
referred to.
But that the Invention may be better understood I will, by the aid of
the Drawings, proceed to describe means pursued by me in carrying the
same into effect.

page_text: :
DESCRIPTION OF THE DRAWINGS.
Figure 1 shew external views, and Figure 2, a vertical sectional view,
and Figures 3 and 4, two horizontal sections of apparatus arranged
according to my Invention.
a is the outer case, and 6 is the bell which is acted upon by the
hammer c for effecting the desired call or signal; d is the main cylinder
or drum containing the main spring by which motion is obtained to
the various parts when desired, one end of the enclosed spring being
affixed to the cylinder or drum, and the other to the enclosed axis
on which is applied the pinion e, and the teeth of this pinion e are
taken into by the teeth of a pinion ƒ formed on or applied to the
tubular spindle f¹, one end of which is supported to turn freely in the
portion a¹ of the main framing, whilst the upper part thereof is retained
in position by the bracket a², which bracket is formed with a neck
to support the bell 6 and hold that bell in correct position by its being
screwed thereon, or by a screw nut applied on that neck. The hollow
spindle also passes through this neck and projecting above the bell;
it has applied to it the milled disc or wheel f" by which the rotation
of the tubular spindle f¹ and the consequent winding up of the spring
are effected. The ratchet hand check h¹ prevent the uncoiling of the
spring in the barrel d in the usual way with such barrels when the
spring has been wound up. Upon the main cylinder or barrel d is
applied a toothed wheel d³, the teeth of which take into the teeth of
the pinion i formed on or applied to the spindle ", which is supported
so as to be capable of revolving in the parts of the framing, and has
applied to it the ratchet or such like wheel 2, the teeth of which, by
acting on the opposite ends of the detents or pallets ; applied to the
axis j' on which is affixed the arm of the clapper c, cause that clapper
to vibrate for the purpose of striking the bell to effect the desired call
or alarum when the axis j¹ is released for the purpose. Except when
released the axis j' is held so as to prevent the action of the hammer
by a projection from that axis coming in contact with a projection m
formed on the turned up end of the spring m³, and the hammer is
released by a slight depression of the spring m³ so as to remove the
stop m out of the way of the projection / when the signalling is required.
This is effected by the depression of the rod n which passes down
through the tubular spindle f¹, and has applied to it an arm n³ to rest

page_text: on the spring m³, and at the upper end has applied to it the knob n²,
by depressing which the stop m to the spring m² will be depressed
out of the way of the arm 1, and the mainspring will then be free
to set the hammer in motion. By these means the winding up of
the spring, and the release thereof for sounding of the bell are effected
at the same part. Call or signal bell apparatus as thus arranged
affords facility for the application thereof to paper weights or other
surfaces.
Having thus described my Invention, and means which I adopt in
carrying the same into effect, I would have it understood that I do not
confine myself to the precise arrangement of parts as shown and
described, as the same may be varied without departing from the
peculiar character of the Invention; but what I do claim is, the
arranging or combining parts forming call or signal bell apparatus
of the character described, whereby the winding up of the main spring,
and the release of such spring for sounding the bell may be effected
at or about the same point, substantially as described.
In witness whereof, I, the said Henry Brooks, have hereunto
set my hand and seal, this Ninth day of August, in the
year of our Lord One thousand eight hundred and seventy-
five.