Improvements in Machines for Trimming Wood and the like.
Year: 1898

page_text: Date of Application, 14th Jan., 1898- Accepted, 10th Sept., 1898
COMPLETE SPECIFICATION.
Improvements in Machines for Trimming Wood and the like.
I, REGINALD HADDAN, of the Firm of Herbert Haddan & Co., of 18, Buckingham
Street, Strand, W.C., London, Patent Agent, do hereby declare the nature of this
invention, a communication to me from abroad by The Fox Machine Company,
of North Front & 4th Streets, Grand Rapids, Michigan, United States of America,
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:―
My invention relates to a trimming machine of the class in which a recipro-
cating cutter is used adapted to operate with a shear cut, the material to be cut
being held against gages, these gages supporting the work in the path of the
cutter.
The invention consists first in the means for reciprocating the knife carrier;
secondly, in a shield for the projecting portions of the knife; and finally in the
details of construction all as hereinafter fully described.
In the accompanying drawing,
Fig. 1 represents a rear view of my improved trimmer.
Fig. 2 a front view.
Figs. 3, 4, and 5 are sectional detail views.
The base of the machine is shown at A, and this supports a table B which
is provided with ways adapted to receive the carrier C for the knives D). The
knife carrier C has been operated heretofore by a lever having a rack and gear connec-
tion with the carrier, and with an operating connection of this kind a ratchet move-
ment is necessary if the carrier is to be moved any considerable distance and
I have aimed in the present construction to obviate this objection and provide
means for moving the carrier any distance in a continuous operation of the
lever. To this end I provide the carrier with a boss 3 (Figs. 1 and 5) on its rear
face to which is connected the ends of a chain b preferably similar to the chains
used on bicycles and the loops of the chain pass over sprocket wheels c having
bearings at the ends of the frame proper as at d. From thence the chain passes
down over a main driving sprocket e supported between the side of the table
and a depending apron f. The shaft of this sprocket is extended for connection
with the head 9 of a lever support, this head providing four sockets into each
of which is fitted a handle h. It will thus be seen that the continuous operation
of the lever will drive the carrier to the limit of its movement without necessi-
tating any ratchet connection, the draft is taken on the centre of the carrier
and as the fulcrum of the lever is low down there is not so much liability of
tipping the machine and at the same time the handles are brought into a con-
venient position for the operation.
The chain is fastened to the heads of right and left hand screw threaded
bolts 5-6 (Fig. 5) and the stretch of the chain is taken up by these bolts which
are threaded into the bushing 2, turning in the boss 3 on the carrier the stud 2
being held from turning by the check nut 4. If it is desired to tighten the chain
the bushing 2 is revolved, and as 5 is a right hand thread and 6 a left, the chain
will be tightened or loosened accordingly.

page_text: The sprocket wheels c are secured to the frame on studs 8. The chain passes
over these wheels down under the large sprocket e and is held from being dis-
engaged with the sprocket by the idler 10.
The chain and sprocket are covered by the apron f, which also prevents chips
from dropping on the chain. A shield 13 at each end prevents the chips from
falling on the chain as they are shoved from the knife by the gage. 14 is the
line of the gage, which is sufficiently removed from the end of the frame to
allow most of the chips to drop off before being pushed over against shield 13.
The handles h are held in place by the disk g and the screws 17. The sprocket e
is secured to the handle shaft by a key 171 and this shaft has a bearing on the
inside of the frame at 18.
Heretofore shields projecting beyond the ends of the frame proper and adapted
to receive the cutters in the extreme limit of their movement have been made in
the nature of angle plates or wings and have been open upon one side and con-
sequently they are given only partial protection. As now shown. I cover the open
side of the angle plates so as to completely enclose the space and thus prevent
all danger of accident as no opportunity is presented for contact with the edge
of the knife after it passes into the cavity provided by the protecting shields.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed I declare that what
I claim is;
-
1. A trimmer comprising a table and a reciprocating cutter carrier, a rotary
driver and a flexible connection between the driver and the carrier, substantially
as described.
2. A trimmer comprising a table, a carrier having knives, a sprocket with
means for rotating it and a chain between the sprocket and the carrier, sub-
stantially as described.
3. A trimmer comprising a table, a cutter carrier, a chain connected with said
carrier, sprocket supporting the chain at the ends of the frame and a driving
sprocket engaging said chain below the level of the table, substantially
described.
as
4. A trimmer comprising a table, a cutter carrier, a sprocket with means for
rotating it, a chain connecting the sprocket and carrier and an idler for preventing
the chain from becoming displaced, substantially as described.
5. A trimmer comprising a table, a cutter carrier, and a driving chain, said
chain having an adjustable connection with the carrier, substantially as described.
6. A. trimmer comprising a table, a carrier having cutters, a sprocket wheel and
driving chain, and an apron for shielding the chain and sprocket, substantally
as described.
7. A trimmer comprising a table, a cutter carrier, a sprocket wheel and chain,
and supports for the chain, and shields for the chain at the end of the frame,
substantially as described.
8. A trimmer comprising a table, a carrier having an inclined knife and an
enclosing shield for said knife projecting from the end of the frame, substantially
as described
9. A trimmer comprising a table, a carrier having an inclined knife at each
end and a shield for each knife projecting from the ends of the frame and com-
pletely enclosing said knives when within the shields, substantially as described.
Dated this 14th day of January 1897.