Year: 1887

page_text: Date of Application, 26th Apr; 1887.
Specification Accepted, 15th July, 1887.
I, CHARLES LOUIS GOEHRING, of Allegheny, Allegheny County, State of
Pennsylvania, in the United States of America, Physician, do hereby declare the
nature of my invention, 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 an improvement in stave machines, and it consists in the
arrangement and combination of parts, which will be more fully described hereinafter,
and set forth in the claims.
Fig. 1 is a longitudinal vertical section of a machine embodying my invention, taken
on the dotted line 1, 1, of Fig. 2.
Fig. 2 is a longitudinal horizontal section taken on the line 2, 2, of Fig. 1.
Fig. 3 is a vertical cross section of the frame and supports alone.
Fig. 4 is a vertical cross section taken on the line 3, 3 of Fig. 2.
Fig. 5, is a vertical cross section of the belt shifting mechanism.
Fig. 6 is a longitudinal vertical section showing the mechanism for operating the
dogs.
Fig. 7 is an enlarged detail view of the spring catches, and the rollers upon the
top of the table.
•
Figs. 8 and 9 are detail views showing rollers of different forms.
Fig. 10 is a detail of the slide, and the reversing lever.
Fig. 11 is a detail view of one of the carriages.
Fig. 12 is a detail view showing the manner of applying the belts which drive the
cutters.
Fig. 13 is a plan view of one of the carriages.
Fig. 14 is a vertical section taken through the cam-board.
A represents the stationary frame, or table, which may be of any desired construc-
tion, and which has the longitudinal slot, or opening B, made through its top, and in
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page_text: which the sliding tablo C, moves back and forth. Cast as a part of the legs of the
table, and placed at suitable distances apart, are the hangers, or supports D, which
have secured to their lower ends the two supporting guides E, which are provided with
flanges upon their inner edges, as shown in Fig. 3, so as to catch in the opposite sides
of the slide F, and thus support it in position as it is moved back and forth between
them. These supporting guides E are connected together by suitable braces G, and
these braces are cast in a single piece with other braces H as shown. These braces G,
support the guides E, as well as support the hangers. The lower ends of the braces H
are fastened to the legs of the table, and brace the rails rigidly in position. As shown
in Fig. 3, the hangers D, and the supports E, are rigidly braced in position so that they
will allow the slide F, no lateral play or movement whatever. This slide is connected
to the sliding table by means of an upright K, at each end, so that the table and the
slide are rigidly connected and always move together.
Secured upon the slide F, and raised a slight distanco above it is the pattern J,
which will have the exact shape, or outline which is to be given to the edges or sides of
the stave or piece of lumber which is being dressed. The pattern J, is raised slightly
above the slide F, as shown in Fig. 1, so as to bring the pattern in a direct line with
the friction rollers M, which are to bear against its opposite edges, and which rollers
serve to regulate the distance between the inner edges of the carriages which carry the
spindles and cutters. In order to prevent any of the shavings, or other dirt from
falling through the opening B, in the top of the table upon this pattern, and getting
between the friction rollers and thus causing uneven work, the cover L, is secured
upon the top of the pattern, and which projects beyond the edges of the pattern, as
shown, so as to catch any dirt, or shavings which would otherwise have fallen upon the
pattern. The edges of the cover L, projects a suitable distance beyond the edges of
the pattern J, and extend into suitable grooves made to receive them, immediately
over the friction rollers in the two carriages. By having the edges of this cover L,
catch in grooves, as shown, the pattern is effectually protected from having any dirt,
or shavings falling upon it and the friction rollers M.
The slide F, the pattern J, and the sliding table C, are all moved back and
forth by means of the rack which is formed upon the under side of the slide F,
and the pinion N, which is secured to the shaft O, which extends across under the
table A, near its center, and which is journalled in suitable bearings which are provided
therefor. Upon this shaft O, near its outer end, are rigidly secured the two spur
wheels P, Q, of different diameters, to as to cause the pinion to revolve at one rate of
speed when the stave, or piece of lumber is being moved between the cutters to be
dressed, and at another rate of speed when the sliding table is moved backward to
receive another piece. The object of having the sliding table to move at different rates
of speed, is to have the stave or lumber move slowly between the cutters, and when
the carriage is emptied to move backward about two and one-fourth times as fast as it
was noved forward, for the purpose of saving time. The smaller wheel P, meshes
with the wheel R, which is rigidly fastened to the shaft S. The larger wheel Q,
meshes with the wheel V, upon the third shaft W, and this wheel V, in turn meshes
with the smaller wheel T Fig. 2, which is loosely placed upon the shaft S, and has the
pulley U, cast, formed, or rigidly secured to its hub. The wheel T, and the inside
pulley U, being rigidly secured together and loosely placed upon the shaft S, always
revolve together. Upon the shaft S, are placed the three pulleys U, X, Y, of which
the pulley X, revolves idly upon the shaft S, while the one Y, is rigidly secured to it.
When the belt is upon the pulley Y, the shaft S, is being driven so as to cause the
wheel R, to impart inotion to the shaft O, through the wheel P, and thus move the
carriage back at a rapid rate of speed. When the belt is shifted upon the idle pulley X,
the slide and all of its attachments remain stationary. When the belt is shifted upon
the inner pulley U, the small wheel T, is caused to communicate motion through the
two large wheels V, Q, to the shaft O, and thus move the slide and its attachments
slowly forward.
The motion of the slide automatically shifts the belt so as to alternately move the

page_text: slide first in one direction, and then in the other. In the under side of the slide are
made a number of holes Z, in which a pin at each end is placed, and which pins can
be changed from one hole to the other according to the distance it is desired the slide
to travel each way. This pin A', projects downward from the under side of the slide
just far enough to strike against the inner end of the lever B', which is pivoted upon
any suitable support, and which has its outer end connected to the cranked and slotted
lever C¹, by means of the connecting rod D'. The lever C, is pivoted upon the
under side of one of the guiding supports E, and is connected at its inner end to the
rod D, which shifts the belt, this inner end of the lever being slotted so as to allow a
free movement upon the rod D. When the slide reaches the end of its travel in one
direction, the pin A', at that end strikes against the lever B', and shifts the belt from
one pulley to the other, thus causing the slide to reverse its movement.
The two carriages F, which carry the spindles I', provided with the driven pulleys G',
and the cutters H', are placed between suitable guides J, which are rigidly secured to
the supporting guides E, and which extend at right angles thereto. These guides J¹,
are separated a suitable distance at their inner ends to allow the pattern J, to move
freely back and forth between them. The inner ends of the carriages project a slight
distance inward beyond these guides J', so that the friction rollers M, journalled in
their inner edges will bear against the pattern J, and thus regulate the distance between
the carriages and the cutters upon the upper ends of the spindles. Placed in a direct
lino with the friction rollers M, are suitable springs L', which serve to keep the
carriages and spindles forced inward towards each other, and which springs have their
tension regulated by means of the screw rods M³, provided with suitable hand
wheels N', or other regulating devices. The carriages may be used with, or without
friction rollers, so as to lessen the friction upon their bearings on the side upon which
the belts exert their pressure. As the carriages are caused to move in and out by the
pattern J, between them, the cutters H', are caused to move correspondingly, and
thus give the shape of the pattern to the stave or piece of lumber which is being
dressed.
Through the top of the table, or frame A, are made suitable slots a, through which
the upper ends of the spindles move for the purpose of adjusting the cutters in
relation to each other. Secured to the upper portion of each carriage, is a friction
roller P, which bears against a suitable flange Q', which extends partially across the
table on each side of the opening B, for the purpose of preventing the outer ends of
the spindles from binding in the slots through which their upper ends pass, and to
keep the carriages from any tendency to tilt at their upper ends, owing to the pressure
of the belts upon the driving pulleys G¹..
The sliding table C, is placed in the opening B, which is made through the top of
the frame A, and upon the top of this sliding table C, is placed the grooved plate, or
piece of wood R', upon which the stave or other piece of lumber to be dressed is
placed by being passed between the two cutters H', where a flat stavo is simply having
its edges dressed, rollers S', are necessary in order to hold the stave down in position,
but where the staves are being dressed upon their sides, these rollers S', will not be
needed. The staves or pieces of lumber to be dressed will in all cases be held between
the two dogs provided for this purpose.
Rigidly secured to the under side of the top of the table is the cam-board or
hanger A", which is provided with the two horizontal parallel grooves B", and the
two inclined grooves C, which extend in opposite directions. The four grooves are
connected together, so as to form a continuous groove, as shown, and in these grooves
moves or slides the pivotal pins S", by means of which the automatically acting.
dog E" is operated. In order to change this pin S", from one groove to another as
it is carried back and forth by the sliding table upon which the undressed stave is
placed to be dressed, the two spring-actuated automatically acting switches Gare
used, and these switches are placed at the junction of the horizontal grooves with the
two inclined ones C...
While one switch is held forced upward by the spring H", which is, applied to it,.

page_text: the other switch is held forced downward against the lower side of the inclined
groove.
Secured to the inner end of the sliding table, at any suitable point, is the tubular
stationary frame I", in which is placed the spring actuated dog J. This dog is held
in position in the end of its slotted frame I by means of the spring K", which bears
against the end, and which spring has its pressure upon the dog regulated by means
of the set-screw L". Any desired degree of pressure can be given to this spring, so
as to allow the dog to give before the end of the stave or piece of lumber that is
heing dressed to any desired extent. This dog J, when the sliding table has moved
forward to receive a stave, passes in between and just beyond the cutters, so as to bo
ready to receive a new pieco of lumber or stave. This dog always projects above the
top of the table, and moves back and forth between the cutters H, at every movement
of the table. The other dog E", by which the opposite end of the stave which is
being dressed is held, is automatic in its operation, and hence only projects vertically
above the table while the table is carrying forward the stave or piece of lumber
between the cutters, and then this dog E is turned backward while the table is being
moved backward, and then the dog E", rises vertically just in time to clamp another
undressed stave, which has been placed edgewise upon the table for the purpose of
being dressed. This dog E" is journalled upon the pin or bolt O" which passes
through a suitable casting P, which is rigidly secured to the under side of the
sliding table and then the dog rises and falls through the slot made in the table. The
object of this automatic dog E is to rigidly clamp the stave which is being pressed
against the other dog J and thus hold the stavo in position while it is passing
between the two cutters. All that the operator has to do is to place the stave in
position, with one end bearing against the dog J" and then the dog E" rises and
catches the other end so as to rigidly hold it. Connected to the lower end of this
dog E, is a link Q, and to the opposite end of the link is fastened the lever 1" by
means of the pin S. The upper end of this lever R", is secured to the sliding table,
and has its lower end guided in its movements by means of the pin, stud, or pro-
jection S" which moves in the four grooves formed in the vertical hanger A". As
long as this pin S" is in the upper horizontal groove B₁ the lower end of the dog El
is thrown upward, and its upper end is turned backward so as to release tho stave.
While the sliding table is moving backward to receive another stave to be dressed,
this pin S moves in the upper horizontal groove B", and the movement of the table
carries this pin beyond the switch near that end of the groove. As the pin reaches
the switch, the switch closes down, so as to allow the pin to pass, and then the
spring H, upon the same switch, causes it to snap up into position, so as to deflect
the pin S into the inclined groove (". As soon as the pin S passes this inclined
groove C, the dog El begins to rise, because its lower end is being drawn downward
by the link Q, and lever R" and when the pin S reaches the lower horizontal
slot B the dog is in a vertical position and has grasped the end of the stave and
retains it in that position as long as the pin S, is moving in the lower horizontal
groove. When the pin reaches the inclined groove C" at the opposite end, the end of
the lever R, begins to rise upward, and thus forces the lower end of the dog E"
upward at the same time, and this upward movement continues until the pin S"
passes the spring-actuated switch at that end, when the switch snaps back into the
position shown in solid lines. While the pin Sis moving in the lower horizontal
groove B, it is held so rigidly that the lever R" can neither give backward nor
forward, and hence the dog E" is as rigidly held as though it formed a portion of the
lever Ritself. The amount of pressure which can be applied through the dog E
to the end of the stave can be regulated by the spring K and set-screw L" of the
stationary dog J.
By having an automatic dog to thus grasp the ends of the staves, the staves are
dressed upon both sides at the same time, and given any desired shape, and the
rollers, for holding the stave down upon the table, may either be entirely dispensed
with or used in connection with the dogs for holding the staves while being dressed

page_text: on the edges, as may be desired. The rollers are not needed where the stave is held
upon its edge, but where the staves are laid flat upon the movable table for the
purpose of having their edges dressed, then the rollers may either be used alone or
used in connection with this automatically acting dog for holding the stave upon the
table, as may be desired. Where the staves are being dressed upon their edges only,
dogs which are much shorter above the top of the table are used, than where
staves are being dressed upon opposite sides. Dogs of different lengths, but of
exactly the same construction are used upon the same machine and are made inter-
changeable.
Pivoted upon opposite sides of the opening B, through the top of the frame, or
table, are the spring-actuated catches V', which, as the sliding table is moved between
them, open out into the position shown in solid lines in Fig. 7, but which snap back
into the position, across the opening B, as shown in dotted lines in Fig. 7. The
distance these catches shall move backward over the opening B, is regulated by the
stops W, placed upon the top of the frame A, and against which the projections upon
the catches strike. The object of these catches V', is to snap back across the
opening B, in the position shown in dotted lines in Fig. 7, and thus form bridges
across the opening B, to prevent a stave or any large object from falling through the
opening B, upon the machinery below. These catches V₁, come into play as the
sliding table C, moves back for another stave, and the rollers X, which are to carry
the stave away, after having been dressed, refuse, from any accident to catch the
stave and carry it away from the table A. If the stave is caught and carried
away by the rollers X, the catches V', do not come into play with that stave,
but simply snap across the opening B. The rollers X', are journalled in suitable
spring actuated bearings so as to be always forced towards each other, and are
provided with wide flanges at their lower edges so as to catch under opposite
edges of the plate R', which is secured upon the top of the sliding table C.
These rollers are forced towards each other sufficiently far to catch any stave which
is being dressed, and with sufficient force to catch against opposite sides or edges of
the stave and carry it away from the table. These rollers are driven by suitable belts
which extend backward from the table, and which are driven from any suitable driving
source. The flanges on the lower edges of the rollers catch under the stave which has
been dressed, and serve to prevent it from dropping down through the opening B,
upon the machinery below. Where the rollers X, fail for any reason to properly catchi
the stave and carry it away, the catches V₁, by suapping across the opening B, as
shown in dotted lines in Fig. 7, form supports to hold the stave in position until the
sliding table C, makes another movement, and pushes the stave on between the
rollers X. As shown in Fig. 8, flanged rollers are used for operating upon flat staves,
but where the staves are being dressed upon opposite sides and are held in a vertical
position as shown in Fig. 9, straight rollers alone are used. These rollers X', will be
made of rubber, or any other suitable material which will serve to catch the staves, as
here shown and described.
The frames in which the rollers X', are journalled may be constructed as here shown,
or in any other way that may be preferred. The driving belts which operate the
spindles extend outward in a straight line, and pass around pulleys or separate
shafts, which are driven by the crossed belts, as shown in Fig. 12. By this construction
the belts do not interfere with the cam-board A".
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
1. In a stave machine, the combination of the hangers D, the supporting guides E,
secured to their lower ends, and the curved braces G, for connecting the guides
together, with the slide F, pattern J, sliding tablo C, and a mechanism for
moving the slide back and forth between its guides, and the carriages, substantially as
shown.

page_text: .
2. The combination of the hangers D, the supporting guides E, the slide F,
pattern J, sliding table C, and a mechanism for moving the slide back and forth
between the guides, with the stationary guides J', secured to the guides E, the
carriages F, and the springs for forcing the carriages towards cach other, substantially
as described.
3. The combination of the slide, suitable supports therefor, a rack on the under side
of the slide, a pinion for meshing with the rack, and a mechanism for alternately
driving the slide first in one direction and then the other, substantially as set
forth.
4. The combination of the supporting guides, slide F, provided with holes in its
under side, pins placed in the holes, a mechanism for moving the slide back and forth,
the lever, which is struck by the stop pins, the connecting rod, angular lever, and belt
shifter, substantially as specified.
5. The combination of the frane A, having the longitudinal opening through its
top, the sliding table, and a mechanism for moving it back and forth, with the spring
actuated catches, placed upon the top of the table, and between which the table
moves, and rollers for carrying away the piece of dressed lumber, substantially as
shown.
6. The combination of the supports, the slide placed between them, a mechanism for
moving it back and forth, the pattern placed upon the top of the slide, and a cover,
which is secured to the top of the pattern to protect it from dirt and shavings,
substantially as described.
7. The combination of the frame, the opening through the top of the frame,
the sliding table, the spring actuated catches placed upon both sides of the opening,
and the spring actuated flanged rollers, substantially as set forth.
8. The combination of the stationary frame, or table, having a lengthwise opening
through its top to receive the sliding table, the sliding slotted table upon which the
stave is placed to be dressed, with the stationary dog J" which grasps one end of
the stave, and an automatically operating dog E which rises through the slot in the
sliding table, and a mechanism for operating it as the table is moved back and forth,
whereby the dog is made to automatically rise through the slot in the sliding table,
and grasp the end of the stave and hold it until the stave is dressed upon both sides,
and then sinks back below the level of the table while the table is being moved back to
receive another stave, substantially as shown.
9. The combination of the stationary frame, or table, having a lengthwise opening
through its top to receive the sliding table, the grooved hanger A", which is rigidly
secured to its under side and operates the movable dog E" the sliding slotted table
which receives the stave which is to be dressed, and a mechanism for moving it, with
the stationary dog J" against which one end of the stave is pressed, and the pivoted
automatically acting dog E", and a mechanism for operating it, whereby the
automatically acting dog remains in a vertical position holding the stave while it is
being passed between the cutters, and then sinks back through the slot below the level
of the table, substantially as described.
10. The combination of the stationary frame, the grooved hanger All which is
rigidly secured to its under side, the sliding table which carries the stave to be dressed
between the cutters, the cutters which dress opposite sides of the stave, the stationary
dog JJ against which one end of the stave is pressed, the automatic pivoted
dog E, connecting link Q", and the lever R", for operating the dog, the lever being
pivoted to the sliding table at its upper end, and having its lower end operated by
means of a pin or projection S", which catches in the grooves in the grooved hangers,
substantially as set forth.
11. The combination of the stationary frame, the grooved hanger All which is
rigidly secured to the under side of the frame and which is provided with the four
slots B, C, the spring actuated switches G", placed near opposite ends of the
grooves, the sliding table upon which the stave to be dressed is placed, the stationary
dog against which one ond of the stave is pressed, the automatically acting dog, a

page_text: connecting rod Q" connected to its lower end, the lever R", by means of which the
automatically acting dog is operated, the pin or projection for catching in the grooves,
and the cutters by which the stavo is dressed upon both sides at once, substantially as
specified.
.
12. The combination of the frame A, having the slots or opening B, a in its top,
which slots extend at an angle to each other, the independent carriages F', carrying
the spindles I, pulleys G¹, and cutters H', the springs L', for forcing the carriages
towards cach other, the pattern J, which is placed between the carriages, and the
friction rollers M, carried by the carriages to bear against opposite side of the pattern,
the guides J, for the carriages; the slide F, having the pattern secured thereto, and
the guides E, upon which the slide is moved back and forth, substantially as
described.
13. The combination of the table A, provided with suitable slots B, a, the spindles I',
carrying cutters H', at their upper ends, and journalled in suitable carriages F', the
springs L', which are made to exert their pressure against the lower ends of the
carriages for the purpose of moving the cutters laterally in relation to each other,
the friction rollers M, which are journalled in the carriages, the pattern J, which
is placed between the friction rollers; the slide F, upon which the pattern is placed,
and the mechanism, by means of which the pattern is moved back and forth between
the spindles, substantially as described.
14. The combination of the grooved sliding carriages F', in which the spindles I'
are journalled, and provided with friction rollers M, at their inner ends, the
supports J, J, which have their inner edges to catch in the grooves, in opposite sides
of the carriages, the spindles I', the rollers P applied to the carriage, the flange Q',
upon the under side of the table for the rollers P¹, to bear against, and the
belts by means of which the spindles are made to revolve, substantially as
specified.