An Improved Method of Producing Boards and the like from Round Timber.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Improved Method of Producing Boards and the like from Round
Timber.
I, ADOLF JULIUS TENOW, of Sodra Blasieholmshamnen, 2, Stockholm, Sweden,
Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
In sawing up timber the method hitherto employed has been to cut up the log
in one or more operations to rectangular dimensions, the parts thus formed being
then allowed to dry and thereafter sawn into boards which are eventually planed.
According to this invention the log is first split into two or more (not rectan-
gular) pieces, which are thereupon allowed to dry. After drying said pieces are
sawn up into boards of the required dimensions in the usual manner, the boards
being thereupon edged and eventually planed. I prefer, however, to first split
the log about diametrically into halves only, thereupon drying said halves and
finally sawing them into thin boards, which are thereupon cut at the edges.
The invention is illustrated in the annexed drawing showing a cross-section of
a log split diametrally in the manner referred to, there being indicated on the
halves by dotted lines how said halves may be further split and edge-sawn subse-
quent to the drying.
In carrying out this method a circular saw may suitably be employed in the
first splitting operation. If the log be materially larger at the root-end, the log
or its halves may be trimmed off and edge-sawn at the said root-end. In the
splitting operation three blades are then suitably employed, so that each half
will be trimmed off somewhat at the root. The said halves may subsequently be
edge-sawn at the root.
The chief advantages of the present method as compared with the older method
are:
1. The log is in its raw state, so to speak, cut up in essentially two parts only
and consequently by one single operation. This circumstance admits of using
for the purpose machinery of far greater simplicity, such as, for instance, one or
more circular saws.
2. Owing to the fact that very thin circular saws can advantageously be used
for the splitting of dry timber, a great saving of timber is brought about by this
method, since the log as regards the essential part is cut up into the desired
dimensions subsequent to the drying. Moreover, as all edge-sawing is performed
only after splitting the log into boards (for instance for planing), much less waste

page_text: will result in the edge-sawing, and broader, and consequently more valuable,
boards will be obtained than according to the old process.
Dated this 1st day of March 1898.
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agents for the Applicant.
An Improved Method of Producing Boards and the like from Round
Timber.
I, ADOLF JULIUS TENOW, of Sodra Blasieholmshamnen, 2, Stockholm, Sweden,
Mechanical Engineer, do hereby declare the nature of this invention, and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
In sawing up timber the process has hitherto been to cut up the log in one or
more operations to rectangular dimensions, the parts thus formed being then
allowed to dry and thereafter sawn into boards which are eventually planed.
According to this invention the log is first split into two or more (not rectan-
gular) pieces, which are thereupon allowed to dry. After drying, said pieces
are sawn up into boards of the required dimensions in the usual manner, the
boards being thereupon edged and eventually planed. I prefer however, to first
split the log about diametrically into halves only, thereupon drying said halves
and finally sawing them into thin boards, which are thereupon cut at the edges.
The invention is illustrated in the drawing, left with the Provisional Specifica-
tion, which shows a cross-section of a log split diametrically in the manner
referred to, there being indicated on the halves by dotted lines how said halves
may be further split and edge-sawn subsequent to the drying.
In carrying out this method a circular saw may suitably be employed in the
first splitting operation. If the log be materially larger at the root-end, the log
or its halves may be trimmed off and edge-sawn at the said root-end. In the
splitting operation three blades are suitably employed, so that each half will be
trimmed off somewhat at the root. The said halves may subsequently be edge-
sawn at the root.
The chief advantages of the present process as compared with the older method
are:
1. The log is in its raw state, so to speak, cut up in essentially two parts only
and consequently by one single operation. This circumstance admits of using
for the purpose machinery of far greater simplicity, such as, for instance, one or
more circular saws.
2. Owing to the fact that very thin circular saws can advantageously be used
for the splitting of dry timber, a great saving of timber is brought about by this
method, since the log as regards the essential part is cut up into the desired
dimensions subsequent to the drying. Moreover, as all edge-sawing is performed
only after splitting the log into boards (for instance for planing), much less waste
will result in the edge-sawing, and broader, and consequently more valuable,
boards will be obtained than according to the old process.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is _
The process of producing boards and the like from round timber which consists

page_text: in first splitting the log into two or more pieces, thereupon drying said pieces,
and after the drying splitting them into boards of the dimensions required, and
finally edge-sawing, and eventually planing, the boards thus produced, substan-
tially as and for the purpose set forth.
Dated this 5th day of July 1898
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgow, Agents for the Applicant.