US787492A

US787492A - Machine for sawing quartered oak or mahogany veneering.

Info

Publication number: US787492A
Authority: US
Inventors: Aaron Brosius
Original assignee: Z T ROBINSON
Current assignee: Z T ROBINSON
Priority date: 1904-06-29
Filing date: 1904-06-29
Publication date: 1905-04-18
Anticipated expiration: 1922-04-18

Description

I PATENTED APR. 18, 1905. A. BROSIUS.:

MACHINE FOR'SAWING QUARTERED OAK 0R MAHOGANY VEN-EBRING.

' APPLICATION FILED JUNE 20, 1904.

3 SHEETS-SHEET 1.

WITNESSES: 2 A [NVENTOR YPATENTED APR. 18,1905.

A. BROSIUS. Y MACHINE FOR SAWING QUAETBRBD OAK 0R MAHOGANY VENEBRING.

' APPLICATION FILED JUNE 29. 1904.

' s SHEETS-SHEET 2.

-- [/VVE/VTOR Afivrney 'PATENTED AP-R.18, 1905.

Y A. saosms. MACHINE FOR SAWING QUARTERED OAK 0R MAHOGANY VENEERING.

' APPLIQATION F ILED JUNE 29, 1904.

3 BHEETSS. HEET 8:

INVENTOR i w'a mi /6 l Af/omey Patented April is, 1905.

UNITED STATES PATENT OFFICE.

AARON BROSIUS, OF EVANSVILLE, INDIANA, ASSIGNOR TO Z. T. ROBINSON,

' 'OF OWENSBORO, KENTUCKY.

MACHINE FOR SAWING QUARTERED OAK on MAHOGANY VENEERING.

SPECIFICATION forming part of Letters Patent No. 787,492, dated April 18, 1905. Application filed June 29, 1904:. Serial No. 214,669.

To all; whom it may concern:

Be it known that I, AARON BROSIUS, a citizen of the United States, residing at Evansville, county of Vanderburg, and State of Indiana, have invented certain new and useful Improvements in Machines for Sawing Quartered Oak or Mahogany Veneering, ing is a specification.

This invention relates to machines for sawing quartered oak or mahogany veneering.

In quarter-sawing logs the principal object is to obtain the beautiful figured effect, and the ordinary methods now in use only produce about one-sixth of the log in good-figured material. The balance of the log is of inferior figuring, and this enhances the price of veneering taken from the best part of the wood. The usual method after qu artering the log is to saw a flitch out of a quarter as near coincident with the grainas possible, and four of such flitches are obtained from the four quarters of the log. This permits cutting only four times with the grain and will not produce more than about one-tenth of the log in fullfigured stock. The flitch is secured to the sawmill stay-log, and successive strips of veneering are sawed from this flitch; but as the fullfigured material can only be obtained for a small distance in the center of the flitch the balance of the flitch produces second rate stock.

The object of the present invention is to provide an improved machine which will saw practically the entire log into figured stock,

of which the followthereby obviating the immense loss heretofore incident to sawing veneering.

The improved machine I havedevised saws the quartered log. practically along the lines of the grain, which radiate from the center to the circumference or outer portion of the log, from the ordinary method, by which the strips are sawed off in such way that successive strips intersect succeeding radiating grains of the log, only a small portion of the'strips being with the grain in the ordinary method of sawing.

The present invention contemplates the provision of a tilting stay-log, improved means for tilting the stay-log and the quartered log held thereby successively to different angles of inclination. and novel means for locking the stay-log and adjusting mechanism where positioned, the preferredembodiment of the invention being set forth in the accompanying drawings and following specification and the novel features recited in the appended claims.

In the accompanying drawings, Figure 1 is a plan view of the machine; Fig. 2, an endv elevation; Fig. 3, a rear elevation; Fig. 4:, a section on line 4: 4 of Fig. 1; Fig. 5, a detail of one of the eccentrically-operated locking devices; Fig. 6, a diagram illustrating how the fiitch is sawed from the quarter-log according to the ordinary method of sawing; Fig. 7 a view showing how the flitch is held by the stay-log and successive veneers are sawed therefrom, only a few of which coincide with the grain; Fig. 8, a view illustrating how the veneering is sawed with the present invention; and Fig. 9, a view showing by dotted lines the manner in which the quartered log is tilted after the first fiitch of veneers have been sawed as shown in Fig. 8, full lines representing how the stay-log is receded back from the sawing-line to begin the cutting of the succeeding flitch of veneers.

The sawmill-carriage 1 is adapted to reciprocate on its ways 2 in relation to the veneersaw 3 to cause the cut to be made from one end of the log to the other, any suitable means commonly employed for traveling the carriage being used. The carriage has transverse ways or tracks 4, on which slide the heads 5, adjustable on the tracks or ways i by the setworks 6 of Well -known construction. The heads 5 are preferably in the form of sectors and have curved faces 7 and segmental racks 8 located at the sides thereof.

Located between the heads 5 is the stay-log 9, which has trundles 10 mounted in the heads 5, whereby the stay-log is pivoted at the center of the circles in which the curved surfaces 7 and racks 8 are located.

Journaled in suitable bearings 11 on the stay-log 9 is an operating-shaft 12, carrying pinions 13, meshing with the segmental racks 8, and on this shaft is secured a wheel 14, having a plurality of radially-disposed sockets 15 at different points of the periphery thereof for the reception of a movable lever 16, by which the shaft 12 is turned to revolve the pinions 13 and raise or lower the stay-log 9 and bring the quartered log 17, secured thereon by the usual clamps or dogs 18, to the desired angle for cutting the veneers therefrom, as will appear more fully hereinafter.

Journaled in bearings 19 on the stay-log 9 is a shaft 20, having a Wheel 21 similar in all respects to the wheel 14 and operable by a removable lever 22. v The shaft 20 is provided with eccentrically-placed ends 23, which pass loosely through and carry friction clamping blocks or shoes 24, adapted to bear against the curved ways or tracks 7. It will be understood that by operating lever 22 the rotation of shaft 20 will throw the clamping blocks or shoes 24 toward or away from the surfaces 7, according to the direction in which the lever 22 is operated, and when the shoes 24 are clamped down against the surfaces 7 the staylog is securely locked in its adjusted position.

The pinions 13, shaft 12, wheel 14, and lever 16 afford a simple, strong, and rapidlyoperable mechanism for adjusting the stay-log to its different inclinations with the greatest ease, it being understood that the lever is placed in the sockets 15 successively to accomplish the successive adjustments of the stay-log.

The locking mechanism, comprising the shaft 20, wheel 21, shoes 24:, and eccentricallylocated ends 23, constitutes the means for ra pidly and easily locking the stay-log at any point without danger of loosening during the sawing operation or from the weight of the parts, and the desirability of provision of such a mechanism will be clear when it is understood that during the course of a days work several hundred adjustments and lockings of the stay-log become necessary, which precludes the use of any but a fast-operating locking mechanism.

eferring first to Fig. 6, there is shown at A a quarter-log the lines a of which indicate the flitch, which according to the ordinary methods of sawing veneers is the only part of the quarter available if good-figured effects in the veneering are desired, the balance 6 6 of the quarter being second-rate stock on account of the manner in which the grain-lines c radiate from the center (Z of the log. In Fig. 7 the flitch a is shown secured to the stay-log e, from which the veneers are cut successively, as shown, by successive transverse feedings of the stay-log in the ordinary method of sawing. It will be obvious that owing to the radiation of the grain-lines only certain veneers at the center of the flitch have the beautiful full-figu red effect, the balance of the veneers being of inferior appearance.

Reference to Figs. 8 and 9 in connection with the following description of the operation of the machine will give a clear understanding of the manner in which veneers are sawed by my invention and how practically the entire log is used and a good-figured effect obtained. The quartered log A is secured to the stay-log 9 by ordinary clamps 18. The stay-log being in a substantially horizontal position, the carriage is traveled back and forth on its ways and a number of veneers f are sawed off, as shown in Fig. 8, the stay-log being adjusted transversely by the set-works between successive sawings. The width of the flitch of the veneers f will depend upon the appearance, and as soon as thefiguring begins to get poorer the sawing is stopped and the stay-log tilted by the adjusting mechanism after the stay-log has been unlocked to bring the quartered log to the position shown in dotted lines in Fig. 9, from which it will be seen that a portion fof the log projects beyond the sawing-line the width of the new flitch of veneers to be sawed. After locking the stay-log the heads 5 and stay-log are receded, as indicated by the arrow, by operation of the set-works to bring the stay-log to the position shown in full lines in Fig. 9. After cutting off the small triangular strip 9, which necessarily goes to waste, anotherflitch, it, of veneers is sawed until the figuring becomes poor again, when the foregoing operations are repeated. It will be understood that the distance the stay-log is receded will be equal to the width of the flitch of veneers it is desired to saw. Successive operations, carried on as before described, eventually saw up the entire quarter, except a thin strip of usually less than one inch, which remains and which is the part engaged by the clamps 18.

It will be understood that in each sawing of a veneer by my machine a cut is made either along the grain-line or approximating it-that is, in approximately a radial direction of the quarter.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a veneer-sawing machine, the combination with a carriage, of a tilting stay-log for holding the quarter-log, means for adjusting the tilting stay-log to different angles of inclination, a curved member, a shaft, and a shoe eccentrically mounted on said shaft and engageable with the curved member.

2. In a veneer-sawing machine, the combination with a carriage, of a tilting stay-log for holding the quarter-log, means for adjusting the tilting stay-log to different angles of inclination, a stationary curved member, a shaft carried by the tilting stay-log and having an eccentrically-positioned portion, a shoe mounted on said eccentrically-positioned portion and adapted to be engaged with the curved member, a wheel having a plurality IIO of sockets and secured to said shaft, and a lever adapted to be engaged in any of said sockets.

3. In a machine for sawing veneering, the combination with a carriage, of a tilting staylog, stationary gear-sections, a shaft carried by the tilting stay-log, pinions on the shaft engageable with the gear-sections, a wheel on said shaft having sockets, a lever adapted for insertion in any of the sockets, stationary curved members, a shaft carried by the tilting stay-log and having eccentric members,

shoes mounted on said eccentric members and engageable with the curved members, a wheel on said last-named shaft having a plurality of 5 AARON BROSIUS.

Witnesses:

WILLIAM LE MASTERS, F. G. GORE.