IMPROVEMENTS IN SAWING MACHINES FOR SHORT STOCKS
Year: 1881

page_text: LETTERS PATENT to Oskar Carl Paul Fleck and Richard Adolph Emil Fleck,
of the Firm of C. L. P. Fleck, Söhne, Berlin, Germany, for an Invention of
"IMPROVEMENTS IN SAWING MACHINES FOR SHORT STOCKS.”
PROVISIONAL SPECIFICATION left by the said Oskar Carl Paul Fleck and
Richard Adolph Emil Fleck at the Office of the Commissioners of Patents on
the 24th March 1881.
OSKAR CARL PAUL FLECK and RICHARD ADOLPH EMIL FLECK, of the Firm of
C. L. P. Fleck, Söhne, Berlin, Germany. "IMPROVEMENTS IN SAWING MACHINES
FOR SHORT STOCKS."
This Invention relates to machinery for sawing short blocks into boards or
sheets, and is especially useful for the manufacture of cask staves.
It consists chiefly in a new method of holding and feeding the blocks to be
sawn. We attach to the frame of the machine one or two brackets, each of which
carries two feed rollers, and is secured to the machine frame in such a manner that
the rollers can easily be moved out of the way for exchanging the saw blades, for
instance, by turning the bracket on a pivot or shifting it in a slide.
The four lower or feed rollers are grooved or studded or otherwise made to grip
the material, two rollers being placed before and two behind the saws. The four
upper or press rollers are preferably smooth, and placed opposite the feed rollers.
The two press rollers situated on the same side of the machine frame are carried
by a bracket capable of turning on a shaft or pivot placed between the two rollers
and supported in a fork which receives the pressure of the weights. The pivoting
of the said press roller bracket is limited right and left by two stops acting against
the fork which carries the shaft of their bracket.
When the block enters the machine it is drawn in by the outer roller only,
which alone receives the pressure of the weight, while the inner roller remains free
in the air until the raw material passes under it, after which the pressure is
distributed over both rollers.
When the rear end of the block has passed beyond the outer roller which first
received the block, this roller becomes free, and the whole pressure is exerted by
the inner roller.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Oskar Carl Paul Fleck and Richard Adolph Emil Fleck in the Great
Seal Patent Office on the 20th September 1881.
OSKAR CARL PAUL FLECK and RICHARD ADOLPH EMIL FLECK, of the Firm of
C. L. P. Fleck, Söhne, Berlin, Germany. "IMPROVEMENTS IN SAWING MACHINES
FOR SHORT STOCKS."
The construction of the sawing frame making the object of this our Invention
differs from the sawing-machines hitherto in use by its feeding arrangement, as
we are going to set forth, reference being made to the accompanying Drawings.
Sawing machines as at present in general use are provided with two feed-rollers, 1
one before and one behind the saw-blades, and vertically above these feed rollers
they have two press-rollers. For supporting the blocks during the sawing a sliding
carriage was required before and another behind the machine. Nevertheless these
machines were not fit for sawing short blocks, for instance, cask-staves, and we
have therefore arranged our feeding-mechanism in the following manner:-We
arrange two brackets A¹, A³, one before and one behind the saws, each carrying
two rollers C³, C³, C³, C. These feeding rollers are grooved, and are moved by
any ratchet mechanism. The motion is transmitted to one roller directly, which
transfers its motion by means of chains and chain-wheels H to the other rollers.
Vertically above these four feeding rollers there are four rollers B1, B2, B3, B4,
placed in pairs in two brackets M. These brackets may turn in a certain arc on
pivots D, which are secured in the weighted forks L. The bracket receives the
pressure of the bolt and exerts it on the block of wood through both rollers, or'
through one only, as will be explained hereafter. In introducing a block between
the first feed-roller and the first press-roller the second press-roller must turn on
the pivot D until its stopping ribs N' knock against the fork L, this turning being
caused by the second press-roller not being supported from below. The pressure
of fork L is thus exerted on the block by one roller B' only. If the block is
advanced so as to touch the second press-roller, this will exert its pressure also on
the block. Unless the thickness of the wood be too irregular, and its curves too
great, the stopping ribs of the bracket now do not touch the fork at all. At the
beginning of the work the wood is firmly held by the four rollers, and cannot turn
up nor down. The block proceeding on its way is then held by the two pairs of
rollers before and one pair behind the saws, the bracket M2 touching the fork L
with its ribs Ns and roller B suspended in the air. Farther on the block is not
held any more by the first press-roller B', and the ribs N³ of bracket M¹ knock
against the fork L (unless there be another block following immediately behind
the first one), and the block is pressed by roller B before the saws. As soon as
the block leaves the front-rollers it is held by the two pairs of hinder rollers.
The block is thus and therefore kept by four rollers in every. position while
passing the saws. The purpose of the brackets turning on pivots D is to meet any
unevenness of the blocks, and to allow of placing the inner pairs of rollers very
near to the saws, also to allow the two rollers on each bracket to act alternately or
simultaneously as required. In order to permit of easily changing the saws, the
brackets A', A, lying very close to them may turn round pivots E, or shift in

page_text: 2. The arrangement for transmitting the pressure of a weighted lever first on a
bracket, said bracket turning in a certain are on a pivot secured in the fork of
the pressing rod, and transmitting its pressure either to both rollers or to one
roller only.
•
3. The combination of two brackets as described in claim 1, with two pressing
arrangements as in claim 2, allowing of the press-rollers acting alternately,
and causing the blocks however short they may be to be always held by four
rollers.
In witness whereof, we, the said Oskar Carl Paul Fleck and Richard Adolph
Emil Fleck, have hereunto set our hands and seals, this Seventeenth day
1001