US373786A - Band-saw guide - Google Patents

Description

(N'o ModeL).

` J. RYAN.

BAND SAW GUIDE. No. 373,786. Patented Nov. 22, 1887.

' UNITED STATES PATENT EEICE..

`JOHN RYAN, OE CINCINNATI, OHIO.

BAND-SAW GUIDE.

SPECIFICATION forming part of Letters Patent No. 373,786. dated November 22, 1887.

Application tiled July 11, 1887. Serial No. 244,041. (No model.)

To all whom it may concern:

Be it known that I, JOHN RYAN, a citizen of the United States, and a resident ofCincinnati, In the county of Hamilton and State of Ohio, have invented certain new and usefulImprovements in Band-Saw Guides, of which the following is a specification.

My invention relates to improvements in sawguides used more especially as upper guldes in large or giant band-saw mills for controlling the saw in cutting logs; and my invention consists in providing an attaching base-plate, a two-part or open guide-support- Ing frame pivotally connected therewith at one end, and an adjnstingscrew connecting the other or free end of the guide-frame with the said base-plate, whereby said guide-frame is moved or turned on its axis, which is an eccentric one, and set in proper position, and the band-saw, lying intermediate its two parts, simultaneously and properly set for operation upon the approaching log, all as hereinafter fully described.

Other features of my invention will be fully set forth in the following description of the accompanying drawings, in which-l Figure lis a front elevation of my improved guide and a broken section of a band-saw shown in operative connection therewith; Fig. 2, a plan view 0f my invention, showing the guide mounted upon the outer end of one of the customary horizontal arms which project from the column or main frame of the bandsaw mill, said arm being shown broken off and the saw and one of the pivot-bolts of the guide in section; Fig. 3, a rear end elevation of the parts shown in Fig. 2, and Fig. 4 a central section showing the eccentric hinge or pivotal connection between the attaching baseplate and the parts forming the guidesupporting frame.

A represents the customary gnidesupporting arm (shown broken ofi", as above stated) which projects from the upright column `or main frame of a band-saw mill used for sawing logs into lumber. y

a is an ordinary band-saw.

B represents a base-plate, preferably attached upon the end face of arm A by means of one or more screw-bolts, b, passed through -slots (shown in dotted lines b) therein, so as to be longitudinally adjustable, to provide for saws of various widths.

C C represent lugs forming bearing-boxes at one end of plate B, and D D are rectangular longitudinal plates lying parallel with base-plate B, in front thereof, and forming the supportingframe for the upright side guides, c c and d d. On the back of plate D', near its fore end, I provide an enlargement or lug, E, which is centrally bored to receive a pin or shaft, e. (Shown in dotted lines in Fig. 2 and in section in Fig. 4.) When the parts are fitted together, lug E lies intermediate the lugs C C on the base-plate, and is connected With them by meansof screw-bolts F F, which pass through smooth-bored holes in said lugs C C and rigidly engage threaded Openings or sockets in shaft e, constructed in it out of center, as clearlyr shown in Figs. 2, 3, and 4.

f represents a set-screw entering the rear Wall oflug E, with its point bearing upon shaft c to hold it firmly in the desired position.

g g represent screws, and g y nuts thereon, connecting the two plates D D at the proper distance apart to suit different thicknesses of saws used and. make due allowance for wear of the upright side guides, said nuts being on the Shanks of the screws intermediate said plates and jamming against the inner face of plate D, as shown in Figs. 2 and 3. The upright guide-plates c c' and d d are preferably made of brass, and are also arranged in pairs on the inner faces ofthe two supporting-plates D and D near the fore ends thereof. Each side guide is recessed on one of its faces to iit over said supporting-plates D D, and slots H are provided in both said supporting-plates, through which pass screws h, which adjustably secure the side guides in position to snit the desired width of saw used. It is between these guides c c' and d d that the saw runs, as shown in the first three figures ofthe drawings.

To readily track or set the saw so that it is guided direct and rmly held straight during 9 its cutting operation on a log, I provide, in

connection with the eccentrically-disposed axle or bearing mechanism E c F and the side guides above described, a set-screw, I, at the other or rear end of the guide-supporting plate AD.

J is a lock-nut on the shank of adjusting- 'I OO screw I, jamming against the outer face ofplatc D' when the screw is set at the desired position. A slot or recess, i', (shown in dotted lines, Fig. 2,) is made in the base-plate B, through which the screw I passes into its threaded socket or hole in the arm A, to make provision for any required adjustment of said base-plate and the accompanying guide de- Vices.

In the operation of my device, to track or set the saw to the right or left, according to the nature or position of the log, while it (said saw) is either running or at rest, the setscrews j' and I are loosened and either of the screwbolts F turned, so as to simultaneously turn the eccentric or shaft e the required distance. Then said set-screws are tightened or turned up to place, thereby iirmly holding the guides in their set position throughout the entire cut of the saw on the advancing log. rIhe plain unobstructed face of plate D, occasioned by the countersinking of all the screws g and la, permits the claws or clamping -dogs which hold the log in place on its reciprocating carriage to pass freely and very closely thereto,

and thereby reduces the thickness of the log or board remaining after the log has been sawed to a minimum, thus insuring the sawing of each log entire into lumber uniformly and without waste.

Itis obvious that my guide, as above described, could constitute a lower one as well as an upper, except that a rear plate or friction-roller for the rear edge or back of the saw should be provided in connection therewith to guide the saw in a proper manner to the lower band-wheel.

l. A saw-guide composed of an open guideframe consisting of plates D D', containing and supporting any suitable side guides, one plate of said gnideirame being pivotally connected at one end with the guide-arm A or other suitable support on the main frame of a band-saw mill by an eccentric hingejoint,and provided at its opposite end with a set-screw, whereby the saw is properly set in line and held so during the progress of the log advancing against its cutting-edge, substantially as herein set forth.

2. A saw-guide composed of an attaching base-plate, B, longitudinal supportingplates or open frame D D', pivotally connected at one end by an eccentricjoint, C C' E e F,with said base-plate, and provided at its other end with a setscrew, I, or other suitable adjusting device, and upright side guides, c c' d d', mounted on the inner faces of said plates D D', the whole being constructed, arranged, and attached upon the outer end of the usual guidesupporting arm of a band-saw mill, substantially inthe manner and for the purpose speeified.

3. In a saw-guide, the combination, with a base-plate, B, open guide-fraine D D',upright side guides,c'c d d', adjustably and detachably secured within said frame D D', the eccentric hinge-joint C C' E e F, and the set-screw I, of a set-sercw, f, entering the rear wall of box or lug E on plate D', with its point bearing against shaft e, to hold it iirmly after setting, and thereby securely hold the saw against lateral or torsional strain while the log advances to it for cutting into lumber, substantially as herein set forth.

4. A saw-guide composed of the open frame D D', containing the side guides, c c' d d', eccentric hinge-joint C C' E c Ff, and set-screw I, pivotally connecting said frame and its guides with the main frame of the mill, the plate D having a plain or unobstructed outer face, occasioned by the countersinking of the screws g and h, which secure the two parts of said frame D D' together, and also the side guides in place, whereby the saw is guided in such a manner that logs may be sawed to a very narrow board or width without Waste,l substantially as herein set forth.

In testimony of which invention I have hereunto set my hand.

JOHN RYAN.

Vitnesses:

JOHN E. JONES, J oHN ADAM.

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