Improvements in Planes.
Year: 1893

page_text: Date of Application, 13th Sept., 1893
Complete Specification Left, 12th June, 1891-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
Improvements in Planes.
1, LARS JOHAN FORSBERG, of The Scandinavian Sailors' Temperance Home,
Garford Street, Poplar, in the County of Middlesex, Carpenter, do hereby declare
the nature of this invention to be as follows:-
Are
This invention relates to what are known as American planes such as
described in the Specification of a Patent granted in the United States of
America to Frank M. Bailey dated the 7th day of May 1889, No. 402,886.
In such planes the cutter bed is fixed and the cutter is adjusted by being raised
and lowered along the bed by a lever pivotted to it. Thus the direction of motion
of the cutter is longitudinal and therefore inclined to the face of the plane. It
will thus be seen that lowering the cutter tends to close the slot in the face of the
plane through which the cutter protrudes, that is to say the heavier the cut taken
off the work the less the opening allowed for the escape of the shaving.
According to this invention I make the cutter bed movable in a direction at
right angles to the face of the plane. For this purpose I form on its back guiding
surfaces which work against corresponding guiding surfaces fixed to the body of
the plane at right angles to the face and I pivot to the back of the bed one end of
a lever having its fulcrum in the body and whose other end works in a quadrant
also fixed to the body.
A set screw is provided on the end of the lever by which it can be clamped' to
the quadrant in any position. The cutter is clamped to the bed in a similar manner
to that adopted in the American plane. It will thus be seen that by turning the lever
in the quadrant the edge of the cutter is raised and lowered in a direction at right
angles to the face of the plane, and therefore the opening of the slot in the face is
increased or diminished with the cut.
The face and body of the plane in place of being cast as has heretofore been
the practice are formed by bending up the two sides of a sheet of steel thus
making the plane lighter and more durable. The guides and quadrant are made
in a small casting which fits between the bent up sides of the steel plate and are
secured to them by soldering or otherwise.
Dated this 13th day of September 1893..
COMPLETE SPECIFICATION.
Improvements in Planes.
I, LARS JOHAN FORSBERG, of The Scandinavian Sailors' Temperance Home,
Garford Street, Poplar, in the County of. Middlesex, Carpenter, 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 relates to what are known as American planes such as are
described in the Specification of a Patent granted in the United States of America
to Frank M. Bailey dated the 7th day of May 1889 No. 402,886.

page_text: In such planes the cutter bed is fixed and the cutter is adjusted by being raised
and lowered along the bed by a lever pivotted to it. Thus the direction of motion
of the cutter is longitudinal and therefore inclined to the face of the plane. It
will thus be seen that lowering the cutter tends to close the slot in the face of the
plane through which the cutter protrudes, that is to say the heavier the cut taken
off the work the less the opening allowed for the escape of the shaving.
According to this invention I make the cutter bed moveable in a direction at
right angles to the face of the plane. For this purpose I form on its back guiding
surfaces which work against corresponding guiding surfaces fixed to the body of
the plane at right angles to the face and pivot to the back of the bed one end of
a lever having its fulcrum in the body and whose other end works in a quadrant
also fixed to the body.
A set screw is provided on the end of the lever by which it can be clamped to
the quadrant in any position. The cutter is clamped to the bed in a similar
manner to that adopted in the American plane. It will thus be seen that by
turning the lever in the quadrant the edge of the cutter is raised and lowered in a
direction at right angles to the face of the plane, and therefore the opening of the
slot in the face is increased or diminished with the cut.
The face and body of the plane in place of being cast as has heretofore been
the practice are formed by bending up the two sides of a sheet of steel thus
making the plane lighter and more durable. The guides and quadrant are made in
a small casting which fits between the bent up sides of the steel plate and are
secured to them by soldering or otherwise.
Figure 1 18 a side elevation of a plane constructed according to this invention.
Figure 2 is a longitudinal central section of the same and Figure 3 is part of a
longitudinal but not central section.
a is the cutter, b the cutter bed and c the cap which is fastened to the cutter by
the adjustable screw c¹. d is a lever slotted to receive the head of a screw' d'
which passes through a slot in the cutter a and enters the bed b, this screw forms
the fulcrum of the lever. e is a thumb piece pivotted to the lever at e' and having
a cam surface e bearing on the spring e fixed to the lever. By turning the thumb
piece e upwards the pressure of the spring e on the cap c is relieved and the lever d
and cutter a which are suitably slotted can be removed from the bed without
turning the screw d' whose function is to regulate the pressure with which the parts
are held together. All this is old and forms no part of the present invention.
fis the face of the plane and f¹f are its sides all three are made from a single
sheet of metal bent up into a trough like form. Fixed inside this trough by
soldering or otherwise is a casting consisting of two side plates 9 9 connected by.
transverse plates g¹ g³.
Extending across the back of the bed 6 are two lugs bb having vertical
guiding surfaces bearing against vertical faces on the plates g'g'. h is a lever
pivotted at to the back of the bed 6 it has a pin * fixed to it whose ends enter
slots in projections 9* on the plate g. The end of the lever h passes out through
the slot g' in the plate 9 and has a screw thread upon it to receive the nut h³ by
which it is clamped to the plate g.
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 :-
1. A plane in which the edge of the cutter is adjustable up and down at right
angles to the face.
2. The combination of the lugs b' at the back of the cutter bed, guides g³ g³
lever h and nut h³ substantially as described.

page_text: 3. Forming the face fand sides fif¹ of a single sheet of metal substantially as-
described.
4. Planes substantially as described and shown in the drawings.
CARPMAEL & Co.,
Agents for the Applicant..