IMPROVEMENTS IN APPARATUS FOR PLANING OR CHAMFERING METAL PLATES
Year: 1883

page_text: LETTERS PATENT to John Imray of N° 28 Southampton Buildings, Chancery
"
Lane, in the County of Middlesex for an Invention of "IMPROVEMENTS IN
APPARATUS FOR PLANING OR CHAMFERING METAL PLATES communicated to
bim from abroad by Etienne Bouhey of Paris in the Republic of France
PROVISIONAL SPECIFICATION left by the said John Imray at the Office
of the Commissioners of Patents on the 26th June 1883.
JOHN IMRAY of N° 28 Southampton Buildings, Chancery Lane in the County.
of Middlesex "IMPROVEMENTS IN APPARATUS FOR PLANING OR CHAMFERING
METAL PLATES" [communicated to him from abroad by Etienne Bouhey of Paris
in the Republic of France]
When the edge of a metal plate has to be rebated or chamfered in a planing
machine, the undulations of the plate in presence of the rigidly fixed cutter cause
irregularities in the cuts produced. The object of this invention is to prevent such
irregularities. For this purpose the tool holder is mounted on a counterbalanced
lever and is provided with a broad bed or with a roller which is pressed by a
spring on the upper surface of the plate that is being operated on, whilst attached
to the tool holder is a corresponding bed or roller which bears against the under
surface of the plate. Either the plate hold by its ends is caused to travel past the
stationary tool and between the two beds or rollers, or the tool holder with the
tool and the beds or rollers is caused to travel while the plate remains stationary,
and the plate being embraced between the two beds or rollers is either itself
straightened in the part which is being operated on by the tool, or, if the plate is
stiff, its undulations cause the balanced tool holder to give, so that the tool makes
an even cut.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Imray in the Great Seal Patent Office on the 24th December
1883.
JOHN IMRAY of N° 28 Southampton Buildings Chancery Lane in the County
of Middlesex " IMPROVEMENTS IN APPARATUS FOR PLANING OR CHAMFERING
METAL PLATES A communication to me from abroad by Etienne Bouhey of Paris
in the Republic of France
"
When the edge of a metal plate has to be rebated or chamfered in a planing
machine, the undulations of the plate in presence of the rigidly fixed cutter cause
irregularities in the cuts produced. The object of this invention is to prevent such
irregularities. For this purpose, the tool holder is mounted on a counterbalanced
lever and is provided with a broad bed or with a roller which is pressed by a spring
on the upper surface of the plate that is being operated on, whilst attached to the
tool holder is a corresponding bed or roller which bears against the under surface
of the plate. Either the plate held by its ends is caused to travel past the
stationary tool and between the two beds or rollers, or the tool holder with the
tool and the beds or rollers is caused to travel while the plate remains stationary,
and the plate being embraced between the two beds or rollers is either itself
straightened in the part which is being operated on by the tool, or, if the plate is
stiff, its undulations cause the balanced tool holder to give, so that the tool makes
-an-even. cut.
Fig. 1 of the accompanying-drawings. represents the side elevation and Fig. 2
the plan of a planing machine arranged to operate according to this invention.
Fig. 3 is an end view shewing the tool planing a chamfer at the edge of a plate,
and Fig. 4 is an end view shewing the tool arranged to plane the face of a girder.
When a plate is to be planed it is fixed on the table in the usual way with stops,
dogs or bolts A, B. The tool holder C fitted on a vertical slide is counterbalanced
and is provided with two jaws, one D fixed below the plate, and the other E
adjusted above it, by a screw worked by wheel J, at a distance from D corre-
sponding with the thickness of the plate. The screw which presses E down acts
on a spring maintaining a pressure on the plate. When a girder or other piece
has to be planed vertically, the balancing lever of the tool holder is fixed by a
pin F, and vertical feed is given by the screw G. The jaws D and E instead of
being made to rub on the metal, may have antifriction rollers bearing on it.
When a number of plates have to be planed to a certain angle, dogs B may be set
to the desired angle as shewn in Fig. 2, so that these may serve as a gauge for
Fetting the successive plates.
Having thus described the nature of this invention and in what manner the same
is to be performed, as communicated to me by my foreign correspondent, I
claim :-
In apparatus for planing or chamfering metal plates; the use of a balanced tool
holder in combination with guides embracing the plate operated on, substantially
as herein described.
In witness whereof I the said John Imray have hereunto set my hand and seal
this Twenty fourth day of December in the year of our Lord One thousand eight
hundred and eighty three.