Year: 1886

page_text: I, THOMAS PHILLIP CHRISTOPHER CRAMPTON, of 20, Claybrook Road, Fulham
Palace Road, in the county of Middlesex, Electrician, do hereby declare the nature
of this invention to be as follows:-
My invention is designed to provide a simple cheap and compact form of electric
bell, and it relates to that construction of bell wherein the armature, electro-
magnets and clapper are contained within the bell proper.
I construct a frame or carrier with an upper horizontal extension to one end of
which I attach a stud or boss carrying the armature pivot, the said armature also
having secured to it the contact spring.
This frame or carrier also has a lug or boss to carry the screw attaching it to the
neck of the bell and also an insulator. The frame or carrier extends vertically and
bas a web to carry the electro-magnets and a lower horizontal extension which
carries a stud or boss through which passes the adjustable contact screw acting on
the contact spring aforesaid.
The clapper hangs from the top of the armature and being balanced by gravity,
no spring to return it to its normal position is required.
POPPLEWELL, COLTON & Co.,
Agents for the Applicant,
17 and 18, Southampton Buildings, W.C.

page_text: I, THOMAS PHILLIP CHRISTOPHER CRAMPTON of 4 Studland Road Hammersmith
in the county of Middlesex, Electrician do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following:
My invention is designed to provide a simple cheap and compact form of electric
bell and it relates to that construction of bell wherein the armature, electro-
magnets and clapper are contained within the bell proper.
In the accompanying sheet of drawings
Fig. 1 is a sectional elevation of my improved electric bell with the parts con-
structed according to my invention in side elevation.
Fig. 2. an opposite view of the same.
Fig. 3 an end elevation of Fig. 1.
Fig. 4 an end elevation of Fig. 2.
I will now proceed to describe the nature of my invention and for the sake of
clearness with reference to the said drawings.
According to my invention I construct a frame or carrier of metal or other
suitable material A with an upper horizontal extension B to one end of which
I attach a stud or boss C carrying the pivot E on which works the armature F
which said armature also carries the contact spring C. The frame or carrier A has
also a lug or boss H to carry the screw I attaching it to the neck of the bell and
also an insulating washer of wood, ebonite, rubber, leather or other suitable
material J between which and nut K one end of the connection is clamped as usual
the other end of the connection being secured to the stud or boss O carrying the
adjusting screw P.
The frame or carrier A extends vertically and has a web L to carry the electro- :
magnets M. M³, and a lower horizontal extension N which carries a stud or boss O
insulated therefrom through which passes the adjustable contact screw P acting on
the contact spring C aforesaid.
The clapper hangs from the top of the armature and being balanced by gravity
no spring to return it to its normal position is required The bell within which
the mechanism herein-before described is fitted may be of any shape.
The said frame A is made according to my invention with its various parts
cast, or in one piece and thereby the cost of bells of the type before referred to is
considerably cheapened.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I would have it understood

page_text: that I do not claim the connection of the clapper and armature in one piece, or
fixed as one piece, balanced by gravity, the return spring being dispensed with but
what I do claim is
The frame or carrier A having its parts B. H. L. N. cast or formed in one piece
substantially as and for the purposes described.