US1458951A - Miter box - Google Patents

Description

June 19, 1923. 1,458,951

. H. POOLE ET AL .1 MITER BOX Filed Sent. 15 1921 2 Sheets-Sheet -1 .z zPaoe. GRRoma in.

Jun 19, 1923.

'H. POOLE ET AL MITER BOX Filed Sent. 15 1921 2 Sheets-Sheet 2 is a specification.

Patented June 19, 1923.

UNITE.

. g i,45*s,95i STAT as earns-r, oisri-e a;

HARRY POOLE AND onoaon r. Roi/IA N,

or mmmmmxm.

MITER BOX;

Application filed September To all whom it may concern Beaver-head and Stateof Montana,haVeinvented certain new and useful Improvements in Miter Boxes, of which the following This invention relates to miter boxes.

The ordinary miter box is so constructed that by its use apiece of work may be cut improvements in diagonally. at practically any; desired angle,

but it frequentlybecomes necessary to cut a piece of work not only, diagonally but also obliquely and when one is confronted with this task the ordinary miter box is found to I be useless,-and the work must be measured wand the cut laid out thereon and the .saw

theniguided by hand in making the out.

It is therefore. the primary object of the I present invention to provide, a miter box so constructed that the means for supporting and guiding the-saw may be adjusted to adapt the sawto cut not only diagonally but also obliquely'through the piece of work laid upon the bed plate of the box and thus,

im a single operation, accurately cut the work on a plane which is: both diagonal and .oblique to one of its faces.

Another object ;of the invention is to so .Inthe' accompanying I Figure '1 is a perspective View of a miter,

'lng" and guldin I ent'invention;

construct and mount the means for supportit will out not only :dia-gonally but. also obliquely into apiecerof work laid upon the bed plate and against theback plate.

Another object of the inventionis to provide for accurate-adjustment ofthe saw supporting and guiding means and for securely holding the parts in positions of adjustment whilethe saw. is beingreciprocated drawings:

box constructed inaccordance with the pres- Figure 2 is a front box;- t I Figure 3 is a side elevationthereof;

1 Figure 4 is avert-ical: front to elevation of the miter tional View through the miter box;

Figure 5 is a verticalrtransverse SECtlOIlEl the saw that :the saw when supportedthere y may be adjusted to assume any desired angle with relation to the back 1 justment of the bar 11.

rear sec-" 15, v1921. Serial Iva-500,937,.

view taken substantially on the line 5'JS:of F lgure it looking in the direction indicated by the arrows. I j

The miterbox embodying the invention lcomprises a bed frame which is indicated in general by the numeral 1 and which includes end supporting members 2 which may if desired be secured bench or other suitable support. ,The bed frame further-includes a front member .3

4. which members extend and a rear member respectively transversely off the front and rearof the said frame and between tliejend members 2thereof. j

The bed .platerofthe box is indicated in intplacev upon a work i general by the numeral5 and the same com- A prises two sections 6 which are-supported in horizontal position-upon the opposite ends of the frame 1 and. whichhave their adjacent by the numeral 7.

which upstand' in v The head and back. plates of course occupy 7 planes at right angles to each other, and a piece of work to be cut is to be laid within the angle between these plates asin the useof the ordinary miter box.

The supporting and guiding'means forthev 1 saw comprises a bar indicated in general by the numeral 1 1, this bar being swiveled as at 12 at a point intermediate the upper side'of the rear cross member. 4 of .the bed frame 1 so that it mayv have angular movement in a horizontal plane. I They bar is so formedthat its upper side-will b'e'lo-' its ends, T upon cated in a plane. spaced slightlybelow the I plane of the upper'face of the bed ,plate. 5

as shown in Figure 4 of the;drawings, and by reference to said figure andto it will, be observed that the swivell2-is located between the adjacent ends of 'tions of the bedand back plates-these ends of theplate sections being spaced aparta distance sufficient to-permit of swinging adthe bar is provided with .rearwardly projecting lip 14 1 located in spaced relation to the under sideof thebar. The forward portion of the bar is supported upon theupper side of anarcuate forwardly Figure 1 At its forward'end a head13 having a the sec- I curved rail 15 which is in turn supported at v 20, numerals to indicate rail 15 its ends upon the upper side of the member 3 of the frame 1, and a set screw 16 is fitted through the lip 14 and may be adjusted to bind against the under side of the rail 15 so as to secure the bar 11 in various positions of angular adjustment diagonally of the plane of the bed plate 5. In order that the angular position of the bar 11 with relation to the plane of the back plate 8 of the miter box may be accurately determined, an arouate scale blade 17 is mounted upon the base frame 1 and over-lies the arcuate rail 15 in spaced relation thereto, th bar 11 being recessed in its upper side as at 18 to accommodate the said-blade 17, the blade and rail being concentric to the swivel pin 12. An indic ator element 19 which may be in the nature of a short length of wire, spans the recess 18 above the blade 17 and is adapted to be brought into selective registration with the scale marks 20 upon the said blade. It will be understood at this point that the saw employed in connection with the miter box is to be supported for reciprocation above the bar 11 and that when the saw is in full lowered position as for example after having passed entirely through the piece of work being cut, its lower or cutting edge will be positioned longitudinally medially above the said bar and substantially in registration with the indicator element 19. Therefore by providing, in connection with the scale marks the angles represented by the marks, the set screw 16 may be loosened and the saw supporting bar 11 may be angularly adjusted about the swivel pin 12 so as to position the saw supported thereby at any desired angle with relation to the back plate 8 and to thus obtain the desired diagonal out.

The bar 11 is provided, in addition to the head 13 with a head 21 located at its rear end, and an intermediate head 22 in which the swivel pin 12 is engaged, this latter head resting upon the upper side of the rear cross member 4 of the bed frame 1. A shaft 23 is .jou'rnaled for rotative adjustment in the heads 13, 21 and 22 and extends above the and beneath the scale blade 17 and projects at its ends beyond the said heads 13 and 21 as shown in Figure 4 of the draw ings. The projecting ends ofthe shaft 23 support the saw guides the forward one of which is indicated in general by the numeral 24 and the rear one by the numeral 25. Except as will presently be explained, these guides are of counterpart construction and each comprises a tubular arm 26 which is keyed at its lower end as at 27 to the respective projecting end of the shaft 23 and extends upwardly radially therefrom. The arms occupy the same plane in aveneral front to rear direction and each is formed with a diametric longitudinally, extending slot 28, these slots being in alignment and being adapted to receive the blade of the saw employed in connection with the box. Each of the supports 24 and 25 further comprises the usual stem 29 which is telescopically fitted within the bore of the respective arm 24 or 25 as the case may be and which is provided at its upper end with the usual head 30 provided with a slot 31 sufficiently broad to accommodate the back of a hack saw, the stem 29 being formed with a longitudinally extending diametric slot 32 opening at its upper end into the slot 31 and being designed to register With the slot 28 of the respective arm and accommodate the blade of said saw.

In the ordinary miter box the saw supporting arms corresponding to the arms 24 and 25 are rigidly mounted in perpendicular position and the saw is capable only of angular adjustment about a vertical axis so as to effect diagonal cuts, but in the present construction by mounting the arms 24 and 25 upon the ends of the shaft 23 which shaft is capable of angular adjustment, the arms may be swung laterally toward either side to position the saw blade at any desired oblique angle so that when occasion equires an oblique as well as a diagonal cut may be effected by the saw. In order that the shaft 23 may be held in positions of adjustment, a set screw 33 is threaded into one side of the head 13 and may be tightened to bear against the shaft 23, and in order that the angle of oblique disposition of the saw blade may be definitely determined, a sector shaped scale plate 34 is fixed upon the outer end of the head 13, and the lower end of the arm 24 is'provided with a pointer 35 for selective registration with the scale marks 36 upon this plate.

It will be evident from the foregoing that as the relatively angularly disposed edges 7 of the bed plate sections 6 afford clearance for the cutting edge of the saw in all positions of diagonal adjustment thereof, so do the upwardly diverging edges 10 of the back plate sections 9 provide for oblique disposition of the saw blade while maintaining its diagonal adjustment.

aving thus described the invention what is claimed as new is:

1. A miter box comprising a bed plate, a saw-supporting bar provided with depending bearings one of said bearings being swiveled to the bed plate whereby the sawsupporting bar may have pivotal movement in a plane parallel with the plane of the bed plate, a shaft journaled in said bearings, saw guides secured to the ends of said shaft and projecting upwardly radially therefrom, means for securing said shaft in a set position, means for securing the sawsupporting bar in a set position, said bar having a recess in its upper side, a guard plate concentric with the pivot of the bar said shaft and passing through said recess, and a marker on the upper side of the bar bridging said recess.

2. A miter box comprising a bed plate, a saw-supporting bar-provided with depending bearings at its ends and-at a point between its ends, being swiveled to the bed the saw-supporting bar] may have pivotal movement in a plane parallel with the plane of the bed plate, a shaft journaled' in said bearings, saw guides secured to the ends of projecting upwardly radially therefrom, means for securing said shaft in a set position, means for securing the the last-mentioned bearing plate Whereby saw-supporting bar'in a set position, a hori-- vzontal railupon Which the saw-supporting bar rests, said rail being concentric with:

said bar havin'ga the pivot of said bar and recess in'its upper side ver-ticallyfo ver said rail,-a guard plate Concentric withthepivot of said bar passing through said. recess, a marker on the upper side of the bar bridging said plate, an index plate on the front bearing, and a' pointer on the front saw guide oo-operating with said index plate,

tures.

In testimonygwhereo'f we affix our signa-

Images