if of Large Dimensions of Exceeding Lightness.
Year: 1885

page_text: if of Large Dimensions of Exceeding Lightness.
We JOHN WILLIAM HOFFMAN, of 54 Junction Road, Upper Holloway, London,
in the County of Middlesex, Gentleman, and PETER ERBACH, of 59 Junction Road,
Upper Holloway, London, in the County of Middlesex, Baker, do hereby declare
the nature of our invention for IMPROVEMENTS IN THE MANUFACTURE OF BELLS,
PRODUCING BELLS EVEN IF OF LARGE DIMENSIONS OF EXCEEDING LIGHTNESS to be
as follows:-
Hitherto bells of large size have been made by casting, and a very heavy weight
of metal has been therefore found necessary in order to obtain therefrom the
sonorous tone required.
Our invention relates to a new mode of manufacture whereby this great amount
of metal may be reduced to an enormous extent, and all the trouble of conveying
and hanging bells of largo dimensions will be obviated.
We propose to make belis of a malleable metal which we may partly cast and
then hammer, or wholly hammer, press, turn or spin into shape, and we propose to
form the bell with a flattened instead of the usual conical top which retains the
sound instead of throwing it out of the bell.

page_text: if of Large Dimensions of Exceeding Lightness.
We JOHN WILLIAM HOFFMAN of 54 Junction Road Upper Holloway, London
in the County of Middlesex Gentleman, and PETER ERBACH of 59 Junction Road
Upper Holloway London in the County of Middlesex Baker do hereby declare the
naturo of our invention for IMPROVEMENTS IN THE MANUFACTURE OF BELLS
PRODUCING BELLS EVEN IF OF LARGE DIMENSIONS OF EXCEEDING LIGHTNESS and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
Hitherto Bells of large size have been made by casting, and a very heavy weight
of metal has been therefore found necessary in order to obtain therefrom the
sonorous tone required.
Our Invention relates to a new mode of manufacture whereby this great amount
of metal may be reduced to an enormous extent, and all the trouble of conveying
and hanging bells of large dimensions will be obviated.
We make our bells of a malleable metal (composed of say 60 parts of Copper,
20 of Zinc and 20 of Nickel) which we partly cast and then hammer, or wholly
hammer, and we form the bell with a flat instead of the usual conical top, which
retains the sound instead of throwing it out of the bell.
We cast our composition into an ingot and, after suitably annealing, we either
hammer or roll it into a plate or sheet suitable to the size of the bell required;
which will be of a conical shape, that is to say with inclined sides, and have a flat
top; the diameter of this flat top in proportion to the diameter of the bottom of
the bell being as about 3 to 7. We then bring together two edges of the sheet
which is to form the body of the bell and braze them securely to each other, finally
we braze the flat top to the said body and if desirable hammer the whole bell
again,
•
"
The bell may then be fitted in any suitable form for ultimate uso.
We would have it understood that we do not limit ourselves to the exact
proportions above given in the composition of metal above described as such may
be varied to obtain different sounds.
Having now particularly described and ascertained the nature of our inven- 8
tion and in what manner the same is to be performed we declare that what
we claim is
1. The manufacture of Bells from a malleable metal as heroin before described.

page_text: 2. In the manufacture of Bells, forming the body of the bell from a cast ingot of
malleable metal hammered or rolled into a plate or sheet two extremities of which
are brazed together, in combination with a flat top also formed of malleable metal
in a similar manner to the body and brazed thereto, all substantially as herein-
before described.
3. In the manufacture of Bells the combination of a flat top with a concal body
for the purpose specified.
Dated this Elawanth J