US914196A - Miter-box. - Google Patents

Description

N. J. SHIMMEL- 1mm Box.

PPLIATION FILED MAR. 24, 1906. I 91 4, 1 96 Patented Mar. 2, 1909.

2 SHEETS-SHEET 14 in l 1HE Nmmls PETER: co, 'vAsHINarOM n. c, 'a

` N. J. SHIMMEL.

MITER BOX.

APPLIUATION FILED MAR. 24, 190e.

NEWTON J. SHIMMEL, OF SUMMERVILLE, PENNSYLVANIA.

MITER-BOX.

Specification of Letters Patent.

Patented March 2, 1909.

Application filed March 24, 1906. Serial No. 307,808.

To all whom it may concern:

Be it known that I, NEWTON J. SHIMMEL,

citizen of the United States of America, re-` .i rable, comparatively inexpensive to manufacture and highly eflicient for the purposes for which it is used.

Another obj ect of this invention is to provide a miter box that can be conveniently carried by workmen, and may be easily attached to an ordinary wooden miter box, commonly used by carpenters, and made from refuse or waste product usually found where a' piece of work is being performed.

A further object of this invention is to provide a miter box having a single slot or kerf in which a saw moves, the box being constructed so that the saw can be easily and quickly shifted from one position to another without releasing the saw, thereby preventing the saw from sliding through the cut or kerf and contacting with the material being operated upon.

A still further object of this invention is to provide a miter box which can be easily and quickly disassembled, thus permitting a workman to snugly pack the same in a tool chest.

With the above and other objects in view, which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, cornbination, and arrangement of parts to be hereinafter more fully described and then specifically pointed out in the claims, and referring to the drawing accompanying this application, like numerals of reference designate corresponding parts throughout the several views, in which Figure 1 is a side elevation of my improved miter box, Fig. 2 is a front elevation. Fig. 3 is a plan view. Fig. 4 is a section on the line 4-4 of Fig. 1. Fig. 5 is a detail view of the lock lever. Fig. 6 is a perspective view of the sector device. Fig. 7 is a perspective view of the bearing plate. Fig. 8 is a perspective view of the swinging arm. Fig.v 9 is a perspective view of the locking nut. Fig. 10 is a detached view of one of the bell crank levers of the lock lever.

To put my invention into practice, l construct my improved miter box of strong and durable metal, and of a plurality of parts which can be easily and quickly assembled. The miter box is adapted to be used in connection with a frame embodying a horizontal base-board 2 and a vertical board 3 which is secured to the board 2 at right angles thereto. rlhe vertical board 3 is provided with a wedge shaped slot or kerf 4, through which the blade of a saw is adapted to pass. Upon the upper edge of the board 3 directly over the slot or kerf 4 is mounted a bearing plate 7, said bearing plate having two depending standards 8, 8 which support said plate over the baseboard 2 in alinenient with the slot or kerf 4. The bearing plate is substantially semi-circular in plan, and is provided with a central opening 9 and with upwardly extending pins 10, at its edges. Revolubly connected to the bearing plate 7 by a bolt or pin 11, and resting thereon, is a sector 12, said sector being slightly larger than the bearing plates 7 and provided with segmentshaped slots 14, 14 to receive the pins 10, 10, and with notches 15, 15 and 16, said notches being formed in the edge of the sector and being forty-live degrees apart. The plate 7 is also preferably provided with corresponding notches as shown. A swinging arm is also mounted upon the bearing plate 7, said arm consisting of a cylindrical ortion 18 having a rearwardly extending `ldracketed arm 19 which engages the pin or bolt 11 and permits of the arm being swung around the bearing plate 7. The arm 19 is provided with an upwardly extending lug 20 adapted to overlie the sector 12 and be held in engagement therewith by set screws 21, 21. The lug 2O is provided with a vertically disposed slot 22 adapted to register with the slots 15, 15 and 16 of the sector 12 and plate 7. By this arrangement of the parts 7-12 with the slots 14 in the member i 12 and the pins 10 extending through the slots from the plate 7, the saw may be readily adjusted to any required extent other than by the slots 15-16, as will be obvious. The slots 14 will be long enough to enable ll O the member 12 to be adjusted upon the member 7 to an extent equal to one-half the distance between the notches, so that the plate 7 may be adjusted to enable the saw to be placed at any desired angle relative to the material being operated on. The notches 15-16 are designed to enable the operator to set the device readily and without calculation where usual miters aie required, `but if a more delicate adjustment, or a diiierent angle is required then the pins 10 are loos ened and the plate 12 adjusted as above described. The swinging arm carrying the guide device is likewise adjustable with the other parts as will be obvious. ln formi-ng the cylindrical portion 18 of the swinging arm, l provide said portion with wedge shaped grooves 23, 23, while one edge of said portion is cut and sheared as at 24 and bent outwardly to form a lip 25. The lip 25 is provided with an opening 26 to accommodate a locking nut 27, the object of which will be presently described. ln connection with the swinging arm l employ a semicylindrical saw guide 28, the edges of said guide being flanged as at 29, 29, and beveled, as at 30, 30 to engage in the grooves 23, 23 oi the cylindrical portion 18 of the swinging arm. Secured to the lower end of the semicylindrical saw guide 28 is a cleat 31, said cleat being secured to the saw guide by a screw 32. The cleat supports a guide plate 33 for the saw blade 5.

Held a short distance away from the saw guide 28 by spacer blocks 34 is a similar saw guide 35, with the exception that the grooves 23, 23 and the lip 25 are dispensed with, the lower end of the guide 35 carrying a plate 36 similar to the plate 33. rlhe spacer block 34 is connected between the members 28 and 37 at their extreme upper ends as shown, so that the lower ends of the parts are tree to be moved toward and away from each other lto a limited extent. A thumb screw 37 passes through the guide 35 and engages the guide 28, substantially midway of the members whereby the lower end of the guides .may be brought into engagement with the saw blade, allowing a carpenter to temporarily clamp the saw, and thus prevent the same falling or striking the material being operated upon in the miter box while the parts are being shifted, it of course being understood that the thumb screw 37 is slackened when the saw is again to be operated between the guides 28 and 35.

vReference will now be had to the locking and shifting device of my improved miter box. Pivotally connected to the guide 28 by rivets or screws 38, 38 are two bell crank levers 39, 39. A bar 40 is secured to the bell crank levers 39, 39, as at 41, 41, said bar carrying an outwardly extending arm 42.

vAnother bar 43 is connected to the bell crank levers, as at 44, 44. The bar 43 has lits upper end contracted, `as at 45, and extends through a guide way 46 carried by the upy ermost spacing block 34. The spacing bloc r is also provided with a slotted bracket 47, through which the contracted end 45 of the bar 43 extends, and is held in swinging engagement therewith by a pin 48. The bar 43k serves as a means for retaining the lock arm 40 in its Josition parallel to the saw guiding members, as will be obvious. Connected to the arm 42 by a pin 49 is a slotted shifting lever 50 the lower end of said lever carrying a pin 51 and a grip 52, while the upper end oi the lever is provided with a plurality ot equally spaced openings 53 by which the upper end of the shifting lever is locked iin. engagement with the bracket 47 by a pin 54.

The saws to be used in connection with my improved miter box have the upper edges of their blades 5 notched, as at 55 to engage the vpin 51 carried by the lower end of the shifting lever 50. l

The rear edoe of the bar 40 is adapted to engage the vertically Adisposed slot 22 ol the lug 20 and in one of the notches 15, 15 and 16 ot the sector. The bar is adapted to hold the swinging arm in a 'fixed position, as long as said bar engages in the slot 22 and one ot the notches 15, 15 or 16 ot the sector 12, but when the bar is drawn out of engagement with one of the notches by moving said shitting lever outwardly, the swinging arm may be swung at an angle toits original position, at which time the bar 4() will lock in one of the notches 15, 15 and iirmly hold the swinging arm in a stationary position.

ln the operation ci unlocking the swinging' arm, whereby the saw may be swung, the operator either pulls the saw rearwardly which through the medium of the pin 51 and the notch 55 swings the shitting lever rearwardly, or the operator grasps the grip 52 and swings the shifting lever rearwardly thus moving the bar 40 and unlocking the swinging arm 17 The shifting lever 50 can be adjusted in the slotted bracket 47 by removing the pin54 and replacing it in another one of the openings 53 of the shifting lever, the slot oi said shitting lever permitting of its adjustment. This adjustment of the shifting lever is necessary in order that saw blades oi various sizes can be readily used in my improved miter box. f

The vertically disposed slot 22 of the lug 20 oi the swinging arm is ol a greater depth than the notches 15, 15 and 16 of the sector, whereby the bar 40 will only partially recede and will not become entirely disengaged from the lug 20 of the swinging arm. v

The form of slot vor keri of the board 1, )ermits of the saw blade 5 being swung at any desired angle, and l do not care to .con- 'line myseli to the notches 15, 15 and 16 as shown, as the sector may be readily rovided with a great lmany notches, whereby a cut .retaining it in a fixed position relative to may be made with a saw at any angle relative to the board l.

The locking bolt 27 is adapted to engage i one of the flanged edges 29 of the saw guide, I hold said guide in a iixed position, but l the nut which is eccentrically mounted upon the lip 25 can be rotated out of engagement with the saw guide, to permit of the guide being raised and lowered within the cylindrical portion 1S of the swinging arm.

Such changes as are permissible by the appended claims may be resorted to without departing from the spirit and scope of the invention.

llhat l claim and desire to secure by Letters Fatent, is

l. In a miter box, in combination, a bearing plate, a notched member connected to and angularly adjustable upon said bearing plate, a swinging arm pivoted to said plate and member, vertically adjustable saw guides connected to said swinging arm, confronting olates carried by the lower ends of said gui es, and means carried by the saw guides and engaging said swinging arm for said bearing plate.

ln a miter box, in combination, a bearing plate, a notched member connected to and angularly adjustable upon said bearing plate, a swinging arm pivoted to said plate and nember, vertically adjustable saw guides connected to said swinging arm, confronting plates carried by the lower ends of said saw guides, a lever mechanism carried by the saw guides, a latch connected with the lever mechanism and adapted to be shifted thereby to engage in said member whereby said swinging arm is maintained in a lined position relative to said bearing plate, and means carried by said saw guides for l shifting the latch and actuating the lever mechanism.

3. A miter box comprising vertically disposed saw guides, plates carried by the lower ends of said guides and adapted to engage the saw blade, a notched member arranged in operative relation with respect to the saw guides, means for pivotally connecting said saw guides with said notched member, and means carried between the saw guides above the saw blade and engaging said member for maintaining the guides in the position to which they have been adjusted.

4, ln a miter boX in combination, a bearing plate, a notched member connected to and angularly adjustable upon said bearing plate, an adjustable swinging arm pivoted to said plate and member, vertically adjustable saw guides connected to said swinging arm, confronting plates carried by the lower ends of said guides, a pair of bell cranks carried by one of the saw guides, a link for connecting one of the arms of one bell crank to an arm of the other bell crank, a latch member connected to the other arms of the bell cranks, said latch member adapted to engage in said notched plate for maintaining said swinging arm in a fixed position relative to said bearing plate, and actuating means for said latch member and bell crank, said actuating means provided with a finger hole and further having means adapted to be engaged by a saw whereby said actuating means can be operated.

ln testimony whereof I affix my signature in the presence of two witnesses.

NEWTON J. SHIMMEL.

Witnesses:

Vieron JOHNSON, JNO. R. SPEER.

Images