Improved Apparatus for Forming Curved Mortices in the Ends of Bamboos or other Rods.
Year: 1898

page_text: Date of Application, 1st July, 1898
Complete Specification Left, 1st Apr., 1899-Acoepted, 1st July, 1899
PROVISIONAL SPECIFICATION.
Improved Apparatus for Forming Curved Mortices in the Ends of
Bamboos or other Rods.
I, ELI FRAMPTON, of 33, Booth Street East, Oxford Street, Manchester, in the
County of Lancaster, Bamboo Furniture Manufacturer, do hereby declare the
nature of this invention to be as follows:-
This invention relates to means or apparatus for mortising the ends of bamboos
or similar tubular or other rods to cause the same to fit truly the rounded.
surface of bamboos or other round rods in order to make a framework or similar
structure, the invention being designed principally to facilitate the manufacture of
bamboo furniture.
The invention consists mainly in the application to an ordinary vertical drilling
machine of a clamping device which holds the rod or bamboo in a V- or other
groove in a block or table beneath the tool which is such as to sever a desired
length from a rod or cane having its end curved to correspond with the circum-
ference of the rod or bamboo to which the said length is to be fitted. I can thus
make the mortices at each end of the bamboo or rod perfectly true and parallel
and I also can make a mortise at one end of two lengths at the same operation.
This clamping device consists preferably of a pair of vertical rods or bars so
formed at the bottom as to grip the upper surface of the rod or cane; the said
rods or bars are carried by and capable of sliding in suitable bearings fixed on
each side of the drill stock, and are held up out of action by a coiled spring (or
other suitable means) attached or connected to levers which act on the said clamp-
ing rods or bars.
A hand lever is provided by which these rods or bars can be drawn down to
clamp the cane or rod and a catch to hold them in place when gripping the said
cane or rod.
I also provide an adjustable stop or fence against which the end of the cane or
rod is held to determine the length of the part severed by the drilling tool.
This stop is preferably round or rounded to fit the end of the rod or cane if it
should be (as it usually is) already mortised.
Improved Apparatus for Forming Curved Mortises in the Ends of
Bamboos or other Rods.
I, ELI FRAMPTON, of 33, Booth Street East, Oxford Street, Manchester, in the
County of Lancaster, Bamboo Furniture Manufacturer, do hereby declare the
Price 8d. |

page_text: 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 relates to means or apparatus for mortising the ends of bamboos
or similar tubular or other round rods in order to make a frame-work or similar
structure, the invention being designed principally to facilitate the manufacture of
bamboo furniture.
The manner in which my said invention is to be performed or carried into prac-
tical effect will be readily understood on reference to the sheet of drawings here-
unto annexed and the following explanation thereof.
Fig. 1 on the drawings is a side elevation and Fig. 2 a front view of my
improved apparatus, applied to a vertical drilled machine.
The invention consists mainly in the application to an ordinary vertical drilling
machine of a clamping device which holds the bamboo or rod in a V- or other
shaped groove in a block or table beneath the tool which is such as to sever a desired
length from a rod or cane having its end curved to correspond with the circum-
ference of the rod or bamboo to which the said length is to be fitted. I can thus
make mortises at each end of the bamboo or rod perfectly true and parallel
and I also can make a mortise at one end of two lengths at the same operation.
a is the framing or standard carrying the spindle b which is driven by the
endless strap c in the ordinary manner d is the adjustable work table which is sus-
pended by a chaine to the other end of which is attached a counterbalance weight
inside the standard a.
The table d is provided with three notched supports f for carrying the rod or
bamboo the central one f* of which is a block of wood through which there is a
vertical hole corresponding with the diameter of the tool so as to allow the latter
to pass completely through the rod or bamboo which is shown dotted in position
to be operated upon. The table d is also provided with an adjustable stop or
stops against which the end of the cane or rod is held to determine the length
of the part severed by the drilling or mortising tool.
This stop or fence is preferably round or curved to fit the end of the rod or
cane if it should be (as it usually is) already mortised.
The clamping device consists preferably of a pair of vertical rods or bars h so
formed at the base (see Fig. 1) as to grip the rod or cane; the said rods or bars h
are carried by and capable of sliding vertically in suitable bearings i fixed to cach
side of the standard a and are held up out of action by a coiled spring k (or other
suitable device) attached to levers which act on the said clamping rods or bars h.
A swing bar or saddle m (see Fig. 1) may connect these levers 7 so as to allow
the clamps to accommodate themselves to different thicknesses or unevenness of the
bamboo, say for example that one clamp should come over a ring or other projec-
tion on the bamboo or cane. This would not be necessary when treating rods or
canes which are of the same diameter from end to end.
The clamping rods h may be drawn down by a hand lever but I prefer to use a
treadle attached to the lower end of the rod n (see Fig. 1).
The drilling or mortising tool which I prefer to use is made of steel cylinder o
(see Fig. 2) which is notched like a saw at the lower edge.
Inside this cylinder o is a spring piston which as the cutter e descends recedes
into the cylinder compressing the coiled spring until the tool has cut quite through
the rod or cane, when the re-action of the said spring will push the plug or button
out, thus leaving the cutter free for the next operation.
I may here observe that although I have described and shown my invention as
applied to a vertical drilling machine, it will be evident that it may also be
arranged to work in the horizontal position if desired but I consider the vertical
arrangement of the apparatus preferable.
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 improved apparatus constructed and operating substantially as bereinbofore

page_text: described and illustrated by the drawings annexed for forming curved mortises in
the ends of bamboos or other canes or round rods by means of cylindrical
cutters.
Dated this 29th day of March 1899.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.