Year: 1888

page_text: I, GUSTAV CARLSEN of Uleåborg Finland Machinist 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 consists in a machine whereby the blades of timber frame saws, log
frame saws and other saws in a very easy way may be sharpened without removing
the blades from the frames.
The main object of this invention is to avoid the use of files for the said purpose as
has heretofore been usual and to combine the advantages resulting from the use of an
emery-wheel as the grinding mediuni and the advantage which is due to the possibility
of grinding the blades while yet mounted in the frame.
A machine constructed for this purpose is shown on annexed drawing in a perspective
view.
The emery wheel Wis mounted at the end of an arm or lever A which is pivoted on
a horizontal pin a; said pin a has a lug which is pivoted on a
pin a¹ at the end of the
horizontally movable arm A, that is pivoted between the lugs a² of the casting k¹. By
means of these three pins the emery wheel W on the end of the lever A may be moved
in three directions, which movement is imparted to it from the handle formed on the
other end of said lever. These movements are however very limited and serve only
for the small movements necessary while grinding. The lever A is held in a horizontal
position by a somewhat flexible rest or supporting arm f
As means for adjusting the emery-wheel from one tooth to another and for the
different blades serves a stand consisting of the vertical rods S and the horizontal
rods S¹.
The swinging arm A² is as above stated pivoted on the casting k¹ which casting
unites the rods S¹ these being secured to the same by nuts; on the other end the rods
are in a similar way secured to a casting k. These rods are held by a cross-piece K,
in which they are horizontally adjustable in holes through the same and may be held
in any position by means of a set screw s¹.
The same crosspiece or carrier-block K is vertically adjustable on the rods $ which also
pass through holes in the same and on which the carrier block may be moved upwards
or downwards by means of a screws, journalled at its lower end in the foot F and at

page_text: the top in a casting F¹ which unites the rods S at the top. The screws may be turned
by means of the hand wheel H or the crank h.
The emery-wheel gets its rotary motion from the hand wheel T, which by means of
a cord transmits its motion to the small pulley wheel T¹ which is mounted on a small
spindle on the lever A which spindle also carries a pulley wheel T2 from which a cord
transmits the rotation to the emery-wheel spindle.
When the machine is to be used, it is placed near the saw frame and secured to the
floor; then the emery wheel is adjusted in front of one of the blades by pushing the
rods S¹ through the carrier-block K. The wheel T is now turned by one man while
another operates the hand-wheel H with one hand and with the other holds the lever A
and thereby operates the emery-wheel.
When one blade is finished the horizontal rods S¹ are pushed through the carrier
block a distance answering to the distance to the next blade and the grinding is going
on anew.
A simplification of the machine consists in securing the horizontal rods S¹ to the
carrier block K or making them in one piece with the same. The horizontal adjust-
ment of the emery-wheel must then be effected by moving the whole machine. As
will be easily understood the machine may also find appropriate use for other saws
and for instance, for large circular saws.
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 :-
First. A saw blade grinding machine for framesaws and other saws consisting in an
emery wheel mounted at the end of a lever, which may be swung horizontally and
vertically, and which lever is attached to a horizontally swinging arm, pivoted to one
end of a horizontal carrier rod or rods which may be adjusted vertically and horizontally
or only vertically on a frame or standard adapted to be bolted or otherwise secured to
the floor substantially as specified.
Second. The construction of portable saw blade grinding machine described with
reference to the accompanying drawing.
Deted this 20th day of Lun 1.000