Improvements in Apparatus Used for Covering Pianoforte Hammer Heads.
Year: 1896

page_text: Date of Application, 11th May, 1896
Complete Specification Left, 3rd Feb., 1897-Accepted. 1'th May, 1897
PROVISIONAL SPECIFICATION.
Improvements in Apparatus Used for Covering Pianoforte Hammer
Heads.
ARTHUR JAMES HARRISON Kings Leigh Spencer Road Wealdstone Middlesex
Pianoforte Hammer Coverer, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object to provide efficient and simple device for the
purpose of holding or locking together the sides of cores or moulds, used for the purpose
of pressing the felt after being glued, upon the wooden portion of pianoforte hammer
heads.
According to my invention I first provide a pair of metal or wooden bars, which
are hollowed towards the center, upon the upper surface, said bars being held together
by suitable bolts or screws, passing through the two sides.
Now at the side of the said bars, are a second pair of bars, which rest upon but
project above the under pair of bars. The second or outer pair are caused to project
above the under pair, for the purpose of pressing the upper portion of the felt, upon
the upper portion of the wood, which forms the hammer head, both pairs of bars being
held together by metal pins running through lugs which are cast upon the under and
outer pair of bars.
The outer pair of bars being flat, are made to open and close, by working upon the
said pins or studs.
At the extreme end of both outer bars, holes are made said holes being opposite to
each other. Now after the felt has been pressed within the hollow of the first or
under pair of bars, by any suitable means, the second or outer pair of bars are
brought together so pressing the top portion of the felt, after being glued, upon
the wooden portion of the hammer head which has been pressed within the outer
covering or felt, by two or more screws, which pass through the holes in the side of
the outer bars, and are locked together by a nut or lever rotating on the said screw
or screws, said nut or lever being reversed when required to release the hammer
head which has been pressed together by the closing of the outer sides of bars.
11th May 1896.
ARTHUR JAMES HARRISON.
COMPLETE SPECIFICATION.
Improvements in Apparatus Used for Covering Pianoforte Hammer
Heads.
ARTHUR JAMES HARRISON Kings Leigh Spencer Road Wealdstone Middlesex
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 has for its object to provide an efficient and simple device, for the
purpose of holding together the sides of cores, or moulds, used for the purpose
of pressing the felt upon the wooden portion of pianoforte hammer heads, after the
felt has been glued.

page_text: According to my invention, I first, provide a pair of bars called cores, or moulds,.
said hars being hollowed at the top or edge of said bars, the hollow in bars or core,
to suit the desired form of the pianoforte hammer bends. Upon the sides of cores are
a number of projections, said projections having a hole through them for the purpose
of receiving a rod. These bars or cores are held together by suitable screws
passing through the sides; I next provide a second pair of hars, said bars being in the
form of a T, these second pair of bars have also a number of projections, similar to the
first pair of bars which have also holes drilled through the projections or lugs, said
holes being used to receive the said rod which passes through the first pair of bars
or cores said rod also being used to hold the first or under pair of bars or cores to the
second or top pair of bars or cores. At the extreme end of the outer or top pair of
bars or cores an elongated hole is inade through the sides at both ends, but one
side only a screw is fastoned within the elongated hole by a steel pin or bolt, but in
such a manner that the said screw can make an upwards and downwards movement,
in the said elongated hole, the said screw also passes through the elongated hole in the
opposite side, the holes are elongated so that the two upper sides of bars or cores can
open and close, while the said "screw is still within the said holes. On each screw
I provide a nut, handle, or wheel said nut handle, or wheel being screwed so that
the said nut, handle, or wheel can revolve around or upon the said screw for the
purpose of drawing together the sid second or upper pair of bars.
After the felt has been laid upon the edge or hollow part of the under pair of bars
or cores, the wood portion of the pianoforte hammer head is pressed upon the felt
but into the under pair of cores or bars, the upper portion of the felt is now glued, and
the sides or second or upper pair of bars are now drawn together by means of the said
nut handle, or wheel revolving around said screw and the glued felt is pressed upon
the upper, wood portion of the pianoforte hammer head, by this means the sides of the
cores are drawn together in a rapid manner, so preventing the glue from becoming
chilled and so saving considerable time, by the old method of heating said cores, and
using a number of heavy iron clamps together by means of the screw and nut, the
said cores can now be taken from under the press and a second set of cores can now
at once be put under the press, instead of waiting for the glue to dry as in the old
method.
In order that my invention may be more readily understood I have hereunto
annexed the drawings Sheets 1 & 2.
Fig. 1 Sheet 1 is a side view of one of the cores or moulds showing the projections
through which the rod passes.
Fig. 2 is a view of the reverse side of Fig. 1 showing the hollow at the top to the
desired form of the hammer head a a. A A are part sections of the cores or moulds
showing the projections with holes to receive the rod.
Fig. 3 is a plan of the pair of cores screwed together showing the tapered hollow
to receive the felt. bbare the rods passing through the projections. aa aa are the
hollows to receive the felt. A A are end views of Fig. 3.
Fig. 4 Sheet 2 is a side view of one of the top cores showing the elongated holes d d
at the ends to receive the screw, and the projections or brackets e e e e e e e e to
receive rods bb, which connect the upper pair of bars or cores to the first or lower pair
of cores.
Fig. 5 is a view of the top cores fitted to the first pair of cores by means of the
rodsb and drawn together by means of the screws ff and threaded wheels gg.
Fig. 6 is a view of the reverse side of one of the top cores showing
projections e e eeeeee.
Fig. 7 Sheet 1 is a section of Fig. 5 across the line h h the dotted lines showing
the cores open to receive the felt.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
The sides of cores or moulds used in forming the pianoforte hammer heads, that

page_text: has a screw which passes through the side of the extreme end of sides, upon which
nut, screwed handle, or screwed wheel rotates for the purpose of drawing or closing
together the upper or outer of the said cores or moulds, upon the under or inner part.
of the core or mould.
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