Improvement in Straight and Circular Saws, Disc Cutters, and the like.
Year: 1889

page_text: Date of Application, 23rd Jan., 1889
Complete Specification Left, 21st Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvement in Straight and Circular Saws, Disc Cutters, and the
like.
°
I, WILHELM LORENZ, of 41 Westendstrasse, of Karlsruhe, in the Grand Duchy
of Baden, German Empire, Engineer and Manufacturer, do hereby declare the nature
of this invention to be as follows:-
According to my present invention I provide straight and circular saws, disc
cutters and the like with removeable teeth or cutting edges, which are fitted in grooves
or upon heads on the saws or cutters in such a manner as to be firmly fixed thereon
when working, but to be readily removeable therefrom when they require to be changed
or sharpened.
The body of the saw or cutter consequently only acts as a holder or carrier for the
changeable cutting edges.
The accompanying drawing shews by way of example some of the various forms and
modes of attaching such removeable cutting edges.
Fig. 1 shews a circular saw with straight teeth a, curved teeth b, and teeth c
having a curved acting face but straight base for fixing. The profiles of the teeth
can be of any desired configuration.
At Fig. 2 are shewn from a to k a number of different forms of teeth with
various modes of fixing the same by means of differently formed grooves and keys.
The profiles g h and can be made out of cylindrical steel tubes, cut away on one
side.
The teeth are slid upon corresponding cylindrically formed ribs or seats on the saw
or cutter holder.
The teeth can be slid on either from the one side or the other as at Fig. 2, h, k,
and at Fig. 4, or from both sides as at Fig. 3, or they may be slid over or into the
edge of the holder as at Figs. 1 and 2 a to g.
Any fixing by means of screws, wedges, pins, springs &c. is not requisite; it is
sufficient to insure an accurate fit in or on the seat. The teeth may however be
secured by such means as above mentioned such as by pins or screws ? or wedges ³
Fig. 1, or equivalent appliances.
The teeth are preferably made to butt with their rear ends against the next tooth-
holder, the front end being left free and formed at an angle suitable for the particular
cutting operation.
--פה ...
1000
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvement in Straight and Circular Saws, Disc Cutters, and the
like.
1, WILHELM LORENZ, of 44 Westendstrasse, of Karlsruhe in the Grand Duchy of
Baden, German Empire, Engineer and Manufacturer, 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 :-
According to my present invention I provide straight and circular saws, disc-
cutters and the like with removeable teeth or cutting edges, which are fitted in grooves
or upon heads on the saws or cutters in such a manner as to be firmly fixed thereon
when working, but to be readily removeable therefrom when they require to he changed
or sharpened.

page_text: .
Figs 1 to 4 of the accompanying drawings shew a variety of ways in which such
removeable teeth of various different forms can be mounted upon saw plates or cutter
discs.
Thus for example, the straight teeth ad g. the curved teeth and the teeth a
having a curved acting face but straight grooved base for fixing. Figs 1 and 1", can
he secured to the edges of a plate or disc by means of the feathers and grooves
shewn in section at Fig. 2 and may have the profiles shewn in Fig. 2, a to
teeth g can be made out of cylindrical steel tubes cut away on one side. The teeth
are slid upon corresponding cylindrically formed ribs or seats on the saw or cutter
holler.
9.
The
The teeth can also be slid into position from the one or the other side of the saw
plate or cutter disc, as shown at Fig. 3, or from both sides as at Fig. 4. In all cases
the tooth profiles shewn at Fig. 2. a to k and the modes of fixing by means of feathers
and grooves, or ribs, can be employed.
The teeth are preferably made to bear with their back surfaces against the preceding
tooth holder, which consequently has to take the working pressure. The front end
is left free and is formed at an angle suitable for the particular cutting operation.
Any special fixing by means of screws, wedges, pins, springs &c. is not requisite ;
it is sufficient to insure an accurate fit in or on the seat. The teeth may however be
secured by such means as above mentioned such as by pins or screws i i¹ or wedges
Fig. 1, or equivalent appliances.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The herein described construction of saws, disc cutters, and the like, with
removeable teeth fitted to the supporting plate or disc by means of feathers or grooves,
the teeth being supported by the preceding tooth holder for taking the working
pressure.
Dated thin 17th
L
1000
ABEL & IMRAY,
Agents for the Applicant.