Improvements in and Connected with Stone Masons' Points and Chisels.
Year: 1888

page_text: Date of Application, 13th Oct., 1888
Complete Specification Left, 18th June, 1889-Accepted, 27th July, 1889
PROVISIONAL SPECIFICATION.
Improvements in and Connected with Stone Masons' Points and
Chisels.
ALEXANDER ROBB 19 Franklin Street Shieldfield Newcastle on Tyne Stone Mason
do hereby declare the nature of this invention to be as follows:--
To have Cast Steel Holders made lik top part of the ordinary Chisel used by Stone
Masons for stone Cutting, length about the weith of the hand, top end having the
ordinary round head for Wood Mallet, the other end to have a Socket slightly tapered
to receive Cast Steel Points and chisel Bits made to fit and fasten in the socket.
Two point Bits made to fit socket will work together, a slight tap will remove
them when a Chisel Bit can be inserted into the same Holder, several sizes of Chisel
Bits can be used with the same holder. Also when the present tools in use wears
short for the hand, can be made to fit holders, this using up what is at present a
great waste.
31
1511 1
AT
1
1000
ALEXANDER ROBB,
19, Franklin Street, Shieldfield, Newcastle on Tyne.
COMPLETE SPECIFICATION.
Improvements in and Connected with Stone Masons' Points and
Chisels.
I ALEXANDER ROBB of 19 Franklin Street Shieldfield Nowcastlo on Tyne Stone
Mason 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:-
The nature of my invention is as follows.
To have holders made of cast steel, or any other material sutable, shaped lik top
part of the ordinary chisel used by stone masons, length about the weith of the hand,
or any other length or shape sutable. One end having a round head to receive stroke
from wood mallet. The other end to have a rectangular, square, or any other shaped
tapered socket, into which will fit, points and chisel bits, the noncutting end of which
will have a coresponding taper, to fit and fasten in said tapered sockets.
The centre of said sockets to be coincident with the centre of said holders.
My invention aims at the utmost simplicity of structure. By giving the said
Sockets sufficient taper, and preventing the bits getting to the bottom of the said
sockets in holders. The tapered ends of the bits are sliorter than sockets in holders.
So that by entering the noncutting end of bit into the socket, then giving the head of
holder a slight tap, will cause the bits to fasten in the tapered socket. Set screws
keys and tapered pins are entirley dispenced with. Which will enable the holder to
be griped low down, which is most essential in stone cutting. Also less time in
removing the bits, for a slight tap to side of holder or side of bits will cause them to
drop out of socket.
The object of my invention is to enable the securing cheep of a good class of steel,
in the cutting part of stone masons tools. Lightness for carrying about, less waste
than the tools hitherto in use. Economy in using up short tools.
When the tools at
present in use wears short for the hand, they can be made to fit the sockets in said
holders. This using up that which has hitherto been a great waste. Comfort, and
cleanliness, to the hand. Each holder is provided with several interchangeable, points
and chisel bits for use one after the other as they become blunt by wear.
holder can be held in the hand for some time, this doing away to a considerable extent
The same

page_text: tools so often.
with the discomfort caused to the hand in cold and wet weather, by having to change
Having explaned the nature of my invention, I will now proceed to explane, by the
accompanying drawings how the same is to be performed.
Fig. 1 Is a front view of one of the said holders, showing two bit points a bin
working position. The said holder to be made of cast steel or any other sutable
material. Wide at socket part to have sufficient strength to resist bursting, and
having a comfortable hold for the hand. Then tapering to a round neck, and finished
at the top with a round head to receive stroke from wood mallet. The socket is made
rectangular and tapering on four sides the full length of socket.
Fig. 2 Is a cross section of Fig. 1 at A. B.
Fig. 3. Is a side view of holder and bits Fig. 1. The bits to be made of steel.
Fig. 4 Is a vertical section of holder and bits. Fig. 1. Showing the two points a. b.
in working position. And the mode in which the same is fastened in said socket.
The tapered end or noncutting end of bits are shorter than the socket in holder as
shown at c. By entering the tapered end of the bits into the socket, and by giving
the head of the holder a slight tap will cause the bits to fasten in the said socket, so
that the harder the head of holder is struck the tighter the bits get, when a slight tap
to side of holder or side of bits will cause them to drop out instantly.
Fig. 5 Is a bit point to fit socket of holder Fig. 1. d is the tapered end to fit socket.
e. is the cutting end.
Fig. 6 Is a chisel bit to fit holder Fig. 1. f is the tapered end to fit socket. g is the
cutting end.
Fig. 7 Is a broad chisel bit to fit holder Fig. 1. is the tapered end to fit socket.
i is the cutting end.
Fig. 8. Is a holder for heavy work to be struck with mallet or hammer. The
socket to be the same as socket of holder Fig. 1. so that the bits that fits Fig. 1. can
be used with holder Fig. 8.
Fig. 9 1s a cross section of holder Fig. 8. at C. D.
Fig. 10 Is another holder showing a small chisel bit in working position. Holder
Fig. 10 to be used for small chisel and points for fine work.
Fig. 11 Is a cross section of holder Fig. 10. at E. F.
Fig. 12 is a vertical section of holder Fig. 10 showing bit fastened in working
position. The tapered end of the bits are shorter than socket in holder as shown at k.
This causing the bits to fasten in the tapered socket when the holder is struck on the
head, as explaned about Fig. 4. the mode of fastening and removing the bits been
the same. Fig. 13 Is a small chisel bit to fit socket of holder Fig. 10. 7 is the tapered
end to fit socket m. is the cutting end.
Fig. 14 Is a bit point to fit socket of holder Fig. 10. h. is the tapered end to fit
socket of holder. o. is the cutting end.
A great advantage is attained by holder Fig. 10. When working small chisels such
as Fig. 13. in having a large substance to grip in the hand, enabling the workman to
have the tool under better control than with the small grip got of the small chisels
hitherto in use.
The above mentioned holders can also be used for using up the short tools, caused
by the waste that takes place by the tools at present in use. When the present tools
wears short for the hand they can be made to fit the sockets in the said. holders. By
making one end a tapered end coresponding to the taper in socket of holder - as
explaned in Figs. 4. and 12.
When the above mentioned bits wears blunt, to be sharped in the usual manner.
hitherto in practice in sharping masons tools," namleyheating, drawing out,..and
tempering.
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.
1st. The making of holders, to be made of cast steel or any other sutable material

page_text: length and shape as may be most convenient. The said holders to have a tapered
socket at one end, sufficiently tapered to cause the fastening of points and chisel bits
without the aid of set screws keys or tapered pins. A combination of bit points to
work togther, and interchangeable single points with chisel bits of various weiths,
and the mode in which the same is fastened in said sockets, substantially as herein-
before described and illustrated in the accompanying drawings.
2nd. The making of holders to be made of cast steel or any other sutable material
length and shape as may be most convenient. The said holders to have a tapered
socket at one end sufficiently tapered to cause the fastening of points and chisel bits,
without the aid of set screws keys or tapered pins. The said holders to be used for
small chisels for fine stone cutting as shown in Fig. 10 and Fig. 13. substantially as
hereinbefore described and illustrated in the accompanying drawings.
3rd. Economy in using up short tools which has hitherto been a great waste. When
the tools at present in use wears short for the hand, they can be made into bits to
fasten in sockets of said holders substantially as hereinbefore described and illustrated
in the accompanying drawings.
The above invention to apply to stone masons, stone cutters, and grindstone cutters,
hand tools.
Talk! 17h d..
T1000
•