Improvements in Wood-trimming Machines and the like.
Year: 1895

page_text: Date of Application, 11th June, 1895-Accepted, 10th Aug., 1895
Improvements in Wood-trimming Machines and the like.
A communication by THE LELAND & FAULCONER MANUFACTURING COMPANY,
of Detroit, in the County of Wayne and State of Michigan, United States of
America, Manufacturers.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of The Agency for
Foreign Patent Solicitors 6, Lord Street, Liverpool, and 6 Bank Street,
Manchester, both in the County of Lancaster, 118, New Street, Birmingham in the
County of Warwick and 31, High Holborn in the County of Middlesex, Civil
Engineer 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 has reference to certain new and useful improvements in wood-
trimming machines and the like employed in trimining miters, butt-joints and other
edges of pieces of wood for any purpose whereby the efficiency of said machines
may be greatly increased, the adjustment of various parts thereof be rendered
more convenient and accurate, the strain on certain parts relieved, and whereby
other advantages in construction, operation, and results may be secured. The
invention contemplates and consists in the general construction combination and
arrangement of devices and appliances hereinafter described and claimed, and
illustrated in the accompanying drawings, in which,―
Figure 1 is a view in perspective embodying features of the invention.
Figure 2 is a partial plan of the bed or table with the gauge located thereupon.
Figure 3 is a vertical section through a portion of the gauge and table.
Figure 4 is an inverted plan view of the gauge, showing the clamping bolt in
cross section.
Figure 5 is a rear elevation of the trimming machine.
Figure 6 is an end view thereof.
The invention is carried out as follows:-
In the drawings, A denotes a bed or table supported in any suitable manner,
as upon a standard. A¹. B represents a slide frame connected with said table.
Cis a reciprocatory knife slide, C¹ representing the base thereof. D indicates
a bridge secured upon the slide frame and forming a way at the top of the knife
slide, as shown at D1, in which the top of the knife slide reciprocates.
E and E' are the knives secured to the knife slide, as by bolts e.
The base C of the knife slide is made reciprocatory upon an L-shaped gib F
supported upon the slide frame B, said gib being vertically adjustable as by a set
screw f, and also laterally adjustable as by means of a set screw f', said set
screws being engaged in the slide frame. By means of this L-shaped gib
made adjustable laterally and vertically, it is evident that the base of the knife
slide may readily be adjusted in either direction as may be required.
It is obvious that in a machine of this character it is essential that the knife slide
should carry the knives snugly against or with great accuracy adjacent to the
corresponding edge of the table A to insure perfect work. To effect the adjustment
of the base of the knife slide, the L-shaped gib is made adjustable as herein before
stated. To adjust the upper portion of the knife slide, the bridge D is preferably
recessed, as shown, to form the way D' above referred to, the bridge being thus
formed with a front flange d extending downward over the adjacent face of the

page_text: upper portion of the knife slide. The upper edge of the knife slide is formed on a
bevel as indicated in the drawings and an adjustable wedge G bevelled on its lower
surface to form a wedge faced contact with the upper edge of the knife slide, is
provided, extending into the way D¹. The wedge G is provided with an adjusting
screw stem g engaged in the bridge whereby the wedge may be readily adjusted as
required. The base of the knife slide C¹ is formed on its under face with a rack
bar, as indicated at Cwith which meshes a driving gear H. The invention
contemplates forming the rack bar and locating the gear directly beneath the
knives E E. By forming the rack bar and locating the driving gear immediately
below the knives, it will be apparent that there is no lateral strain exerted upon
the knife slide, in consequence of which the knife slide may be more easily
reciprocated than where the driving gear and rack bar are located at one side of
the knives; this will be of obvious advantage, as when a heavy cut is being made
especially. By this construction however a lateral, strain at this point is entirely
avoided. The rack C is shown formed intégral with the base of the knife slide.
It may, however, either be made integral therewith or secured thereto in any
desired manner.
H denotes the bearing for the shaft H2 of the gear H, said bearing being
extended laterally to the rear of the gear from the base of the slide frame. The
gib F extends laterally from the rack and downward, concealing the upper portion
of the gear.
J denotes a ratchet or toothed wheel" provided with a hub J' upon the rear end
of the shaft H. K denotes a weighted arm recessed, as at k, to receive the ratchet
wheel and its hub J'. The upper end of the weighted arm is thus formed with
the two lateral arnis KK.
I
L'is an operating lever fülcramed on the arm K'as shown at 7. The inner end
"of the operating lever L is constructed to engage the ratchet wheel J, as indicated
at 1, a'spring being employed to hold the lever in normal engagement with the
ratchet wheel'J. By this construction and arrangement it will be understood that
a fresh hold, may be readily taken, whenever desired, 'by the operating lever upon
the ratchet wheel J. The arms Känd' K³, as shown, are mounted upon the shaft H³,
the ratchet wheel J-being located therebetween.
In operation it will be perceived that there is exerted an upward strain upon the
knife slide 'by means of the gear Hin-contact with the rack bar C. By engaging
the wedge G firmly upon the upper edge of the knife slide, it will be obvious that
any upward strain upon the knife slide will have a tendency to crowd the knife
slide more firmly against the flange d so as to carry the knives E E at all times
closely in against the corresponding edge of the table A, while by 'means of the
Lshaped gib F and its adjusting screws the base of the knife slide may also be
readily forced in against the adjacent edge of the table 'A. Thus, by means of
the adjustable gib Faud the adjustable wedge G a simple, 'ready, and accurate
adjustment of the knife slide"both vertically and laterally is effectually provided
as may be required to insure perfect work. Such means of adjustment of the knife
slide is obviously of thuch importance to compensate for any wear and also for any
sharpening of the knives. By these improved means of adjustment my correspondents
are enabled to secure greater accuracy of adjustment than in machines of this class
heretofore made.
M'M represent gauges located upon the table A, the two gauges being of similar
construction, except that the one is a right hand, and the other a left hand gauge.
These gauges are each provided with an adjustable plate N which may be secured
to the corresponding gauge by screws n. To adjust the plate N, adjusting screws m
are provided projected laterally within the inner rib m³ of the gauge, the screw
having a conical shaped point, and the plate being bevelled adjacent to the point
as indicated at a Fig. 4. By thus arranging the adjusting screws m with their
conical shaped points in contact with the bevelled edge of the plate N, it will be seen
that by simply loosening up the screws n, the screws m may be set as required to
accurately adjust the edge of the plate N. As shown, the set screws m project

page_text: to the outer edge of the adjacent portion of the gauge so that they may at all
times be readily reached. The orifices of the gauge which receive the screws n
may be made sufficiently larger than the screw, to permit the necessary adjust-
ment of the plate N, as indicated at m'. It is preferred to cut away the under
surface of the ganges M, as indicated in the drawings, so that the base of each
gauge shall be formed with a flange m' at the under edges to insure a firmer
seating of the gauge upon the table A. It will be apparent, that where the
under surface of the gauge is made flat throughout, any dust or extraneous
matter getting under the gauge would have a tendency to make it unsteady in
its location, which liability, however, is largely overcome or effectually prevented
by forming the gauges with a seating flange at the edge of the base thereof.
The base of the gauge is also constructed with an arc-shaped groove indicated
at M, in which are secured correspondingly shaped ribs P P, said ribs projecting
into the slot or recess M' and downward therebeneath. These ribs are fitted snugly
in place by screws p. Practically they form a part.of the gauge and might be
formed integrally therewith. But it is more convenient in the construction of the
gauge to form the ribs separately and secure them to the gauge, in the manner
described; by forming the gauge with the slot M' to receive the upper portion of
said ribs. The slot M' is inade, as will be understood, with the outer edge of the
plate N as the centre on which the arc is formed. The bed or table A is formed
with an are shaped slot for each of the gauges M, said slot in the table being
indicated at Q. The centre from which each of the slots Q is formed, corresponds
to the centre from which the recesses or slots M'are formed. It is well understood
by those skilled in the art, that the slots Q are formed in the table A. to provide
for the accurate adjustment of the corresponding gauge M from the cominon
centre which is at the very edge of the table adjacent to the knives. To provide
for the adjustment of the gauges M in the slots Q, said slots Q are constructed
each with a fixed edge of suitable form at the front of the slot Q, as at the edge a.
The under surface of the table A, immediately to the rear of each of the slots Q
is formed with a bevelled sui face, as indicated at a¹. Into each of the slots Q the
ribs P of the corresponding gauge project, the front faces of said ribs being trued
accurately to correspond to the straight edge at a, in front thereof when the ribs are
in place in the slot Q.
R represents a gib constructed with a bevelled upper face at the rear edge thereof,
accurately corresponding and fitted to the bevelled face at a of the table.
M' is a clamping bolt passed through a slot at m³ in the gauge and through the
corresponding gib R, said bolt being provided with a nut M³ on its lower end
beneath the gib R. Upon the upper end of the bolt M2 is fulcrumed an eccentric
lever or cam S, the fulcrum being indicated at s, by means of which it will be seen
the gib R may be forced against the bevelled or wedged shaped face a¹ of the table,
to clamp the gauge M upon the table. It will be recognized readily that when the
gib R is thus forced against the wedged face a' of the table by the manipulation of
the lever S, the ribs P P will be forced firmly against the edge at a in front
thereof, in consequence of which the edge of the plate N will be set and held with.
the utmost accuracy, as is requisite, at the edge of the table A.
It is well known that if by any means the edge of the plate N were projected
even to a very slight degree beyond the edge of the table A, the knives E E'
would come in contact therewith in their reciprocation, shearing off the edge of the
plate N and thereby also dulling or cutting away the edge of the knives, doing
great damage to the machine. It becomes essential, therefore, that the edge of the
plate N should be set at the edge of the table A with the utmost accuracy and
without any liability whatsoever of its improper adjustment.
Should the edge of the plate N, on the other hand, be set unduly inward from
the edge of the table, even to a slight degree, the work accomplished would be very
imperfect and unsatisfactory, as the unsupported portion is left with a ragged or
rough edge, and a smooth cut upon the work could not then be effected. By their
construction and arrangement of parts, however, my correspondents, are enabled.

page_text: readily and conveniently and with the utmost accuracy to set the edge of the plate N
in proper position without any liability whatever of its either being projected
beyond the edge or short of the edge, and which they accomplish by means of the
adjacent, correspondingly constructed faces of the ribs P P and the edge a of the
slot Q, in connection with the adjacent bevelled or wedge shaped faces of the gib R
and the face a' of the table, as hereinbefore explained. The front portion of the
gib R is out of contact with the adjacent portion of the table A, leaving the gib
free to move forward to allow the ribs P to contact firmly with the face a of
the table.
The upper face of the table, as is customary in machines of this class, is marked
off with radial lines, at any desired angle, to facilitate the setting of the gauge as
may be required.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondents, I declare that what I claim is :-
1. In a trimining machine, the combination of a table, a rigid slide frame, a
reciprocatory knife slide having its base located adjacent to the rear edge of the
table, knives secured to the knife slide, and an adjusting device to adjust the base of
said knife slide toward and from the rear edge of the table, substantially as
set forth.
2. In a trimming machine, the combination of a table, a rigid slide frame, a
reciprocatory knife slide having its base located adjacent to the rear edge of the
table, and knives secured to the knife slide, and means to laterally and vertically
adjust said knife slide, substantially as set forth.
3. In a trimming machine, the combination of a table, a slide frame, a horizon-
tally reciprocatory knife slide having its base located adjacent to one edge of the
table, and an adjustable L-shaped gib Fat the base of the knife slide, whereby said
slide may be adjusted, said gib extending horizontally underneath the base of the
knife slide and vertically upward at the outer edge of the base of the slide,
substantially as and in the manner described.
4. In a trimining machine, the combination of a table, a slide frame, and a
horizontally reciprocatory knife slide, the upper portion of the knife slide being
laterally adjustable independently of the base of the slide, substantially as set forth.
5. In a trimming machine, the combination of a table, a slide frame, a
reciprocatory knife slide bevelled at the top thereof, and a bevelled faced wedge G
adjustably engaged in the slide frame bearing against the upper bevelled portion of
the knife slide, substantially as and for the purpose described.
6. In a trimming machine, the combination of a table, a rigid slide frame located
at one side of the table, a reciprocatory knife slide having its base located adjacent
to the edge of the table and provided with a rack beneath the knives, and a pinion
between the slide frame and table below the rack meshing therewith, said rack
and pinion being in the same vertical plane as the knife slide, substantially as
set forth.
7. In a trimming machine, the combination of a table, provided with an arc
shaped slot Q and having a bevelled face a to the rear of the slot and
adjacent thereto, a reciprocatory knife slide having its base located adjacent to one
edge of the table, an oscillatory gauge having an angular edge located adjacent to
the edge of the table and provided with ribs shaped to correspond to the arc of
said slot and projecting thereinto, a gib R below said slot, and a clamping bolt
engaging said gib and gauge with said table, said gib having a bevelled rear face to
contact with the bevelled face a', the front faces of said slot and of said ribs being
of corresponding form, said gib movable forward along said bevelled faces to force
the front faces of said ribs firmly against the front face of the said slot when the
clamping bolt is tightened, whereby the angular edge of the gauge will be held
true to the edge of the table, substantially as set forth.
8. In a trimming machine, a gauge provided with an inner rib m³ aud an

page_text: adjustable plate N bevelled at its rear edge, screws n engaging said plate to sand
rib, and conical pointed adjusting screws m having their conical points in contact
with the bevelled rear edge of said plate whereby the plate may be adjusted by
turning said adjusting screws, said screws n and m projecting laterally through said
rib to the exterior thereof at right angles to the plate and parallel with one
another, whereby the plate N may be adjusted without its removal from the gauge,
substantially as set forth.
9. In a trimming machine, the combination of a table, a rigid slide frame at one
side of the table, a reciprocatory knife slide having its base located adjacent to one
edge of the table, and means at the top and base of the knife slide to adjust said
knife slide independent of the slide frame, substantially as set forth.
10. In a trimming machine, the combination of a table, a slide frame provided
at its base with a laterally extended bearing H', a reciprocatory knife slide provided
said shaft,
with a rack therebeneath, a pinion meshing with said rack having its shaft journaled
upon
in said bearing, a weighted arm having lateral arms K'K' mounted
a ratchet wheel mounted upon said shaft between the arms K' K' and an operating
lever to engage said ratchet wheel, said rack and pinion being in the same vertical
plane as the knife slide, substantially as set forth.
ليمي
of Tune 1895.
WM. P. THOMPSON &
Agente.