US2547121A

US2547121A - Adjustable miter box

Info

Publication number: US2547121A
Application number: US26191A
Authority: US
Inventors: Hess Robert Edward
Original assignee: MITER KING Co
Current assignee: MITER KING Co
Priority date: 1948-05-10
Filing date: 1948-05-10
Publication date: 1951-04-03
Anticipated expiration: 1968-04-03

Description

April 3, 1951 R. E. HESS ADJUSTABLE MITER BOX Filed May 10, 1948 INVENTOR. P0551??- E HLJJ ATTORNEYS.

Patented Apr. 3, 1951 OFFICE ADJUSTABLE BIITER BOX Robert Edward Hess, Burbank, Calif., assignor to Miter King Company, Los Angeles, Calif., a

copartnership Application May 10, 1948, Serial No. 26,191

3 Claims.

1 The present invention relates to improvements in an adjustable miter box. It consists of the combinations, constructions and arrangements of parts, as hereinafter described and claimed.

With conventional miter boxes, the lumber must be brought to the box for sawing. The principal object of my invention is to provide an adjustable miter box that can be placed directly on the piece .to be cut and held in position by hand during the cutting operation. The device is light in weight and therefor can be readily transported to the place where needed.

A further object of my invention is to provide a device of the type described which permits the use of any standard saw. In conventional boxes the saw is guided by slots provided in spaced uprights. Also a special saw is used. In my device the saw guide will accommodate any standard saw.

A further object of my invention is to provide a base plate with a guide strip designed to con tact an edge of the board being cut. The base rests on the upper surface of the board and the guide strip aligns the base in proper position on the wood so that the pivoted saw guide arm can be swung into the desired angular position with respect to the base and be secured in the adjusted position. The arm has a saw guide in which the saw may be reciprocated.

Another object of the invention is to provide a recess in the base of the device to facilitate gripping Work pieces of various Widths and to facilitate the holding of the device in a fixed position on the work.

Other objects and advantages will appear in the following specification, and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawing forming a part of this application, in which:

Figure 1 is a top plan view of the device;

Figure 2 is an end elevation; and

Figure 3 is a transverse section taken along the line IIIIII of Figure 1.

While I have shown only the preferred form of my invention, it should be understood that various changes or modifications may be made within the scope of the appended claims without departing from the spirit and scope of the invention.

In carrying out my invention, I provide a base A of the shape shown in plan view in Figure 1. The base has a guide strip B extending along the undersurface I of th base and secured in place Ill) by screws 2 or other suitable fastening means. The screws 2 have conical heads that are received in countersunk openings so that the tops of the heads will lie flush with the top 3 of the base. The guide strip parallels the front edge 24 of the base and is spaced inwardly therefrom.

An arm C is pivotally secured to the top of the base by a cap screw 3, or other suitable pivotal means. A look washer 5 is placed under the cap screw head and bears on the upper surface of the horizontal portion 5 of the arm C. Sufficient friction is provided by this connection to prevent the too ready swinging of the arm and yet the operator can swing the arm into the desired angular position. with respect to the base A.

Reference to Figure 1 shows the horizontal portion 6 of the arm provided with an arcuate slot 7 whose center is the cap screw 6. The edge 8 of the portion 6 disposed adjacent to the slot I is made arcuate so as to be concentric with the slot. The space between the slot 1 and the edge 8 is graduated at t in degrees from a zero reading, midway between the ends of the slot up to a fifty degree reading at each end of the slot. The upper surface of the base A. has an indicating mark ID thereon and the operator may swing the arm C to bring any desired one of the graduations 9 into registry with the mark. A bolt ii carried by the base A, and guide strip B, see Figure 3, is slidably received in the arcuate slot 1. A wing nut 32 is threaded down upon the bolt for clamping the arm to the base after the arm has been swung into the desired angular position.

As already stated, the arm C has a horizontal portion 6 that swings over the top of the base. This horizontal portion 6 has integral and upstanding saw-guiding plate 13. An end plate I4 is spaced from the plate It by spacers 15 that are placed between the two plates and adjacent to the upper edges thereof. Figure 2 illustrates the general shape of the end plate l4 and the saw-guiding plate is of a similar shape. Bolts I6 are passed through aligned openings in the plates I3 and M and the spacers l5 and secure the plates together. The two plates are spaced a sufficient distance apart to provide a saw-receiving guideway D, see Figure 3. The same figure and Figure 2 illustrate the plates l3 and Hi as being provided with a sight opening or recess, these being referred to at l l and E8, respectively. The two recesses I? and I8 register with each other and permit the operator to view the wood and the saw where the cutting is taking place. It will be noted from Figure 3 that the lower edge IQ of the end plate It is raised above the upper surface of the horizontal portion 6 of the arm C. The purpose of this is to avoid any injury to the teeth of the saw when starting a cut in the wood.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

Figure 1 illustrates the piece of wood E to be cut as being placed on a table top F or other suitable support. The base A of the device is placed on the wood so that its guide strip 13 comes into contact with the edge 2&3 of the wood. The arm C may be adjusted at the desired angle. and a 15 degree cut is indicated in Figure l. The saw blade G is placed in the guideway D and then is brought down onto the top of the. wood The operator can see that the teeth 2| of the saw are registering with the line (if any) marked on the wood and then the sawing operation can be started. The edge 22 of the base A extends at an angle from the pivot cap screw A to permit the arm C to be swung to the left for making a 50 degree cut. The base A also has a recess 23 with an edge 23a that is inclined tov the front edge 24 of the base so that the operator may grip the base with the left hand at this portion, the four fingers of the hand contacting the edge 26 and the thumb contacting the edge 23a. In this way the base is kept in proper position on the wood during the cutting operation. The recess 23 also permits small pieces of wood to be held, such as moldings.

The device will permit the operator to do precision Work. The main advantage is that the device can be taken directly to the work instead of the necessity of moving heavy timbers to the device to be cut. There is also no need for special miter box saws being used since a. con.- ventional all purpose saw will prove just as effective, The device is preferably made from steel or aluminum. The proximity of the edge 23a to the straight edge 24 permits a hand hold for moving the device. The edge 24 in projecting beyond the guide strip B provides a gripping edge for the fingers.

I claim:

1. In a miter box of the character described a base adapted to rest upon an upper surface of a piece of material to be cut, and having a forward edge exposed to be gripped by a sawyers hand; a guide strip secured to the underneath part of the base for butting against a forward vertical face of the piece of material, with the base extending rearwardly over the material; the rear edge of the base having a recess therein defining end walls to limit sliding movement of the sawyers hand along the base; the recess further defining an inclined edge extending diagonally relative to the guide strip, with the recess exposing a section of the piece of material for manual grasping by the sawyers hand.

2. In a miter box of the character described: a base adapted to rest upon an upper surface of a piece of material to be cut, and having a forward edge exposed to be gripped by a sawyers hand; a guide strip secured to the underneath part of the base for butting against a forward vertical face of the piece of material, with the base extending rearwardly over the material; the rear edge of the base having a recess therein deend walls to limit sliding movement of the sawyers hand along the base; the recess further defining an, inclined edge extending diagonally relative to the guide strip, with the recess exposing as section of the piece of material for manual grasping by the sawyers hand; and a s w guide secured, to h ba e beycnd an end Wa o h re es and dispQs on t at de 9 th rec ss ward which sa d incl n d es in the dir ion. 01? th g id str p 3 In a m ter p rof th hara ter d r b a base adapted to rest upon an upper surface of a piece of material to be cut, and having a forward edge exposed to be gripped by a sawyers hand a guide strip secured to the underneath part of the base for butting against a forward vertical face of the piece of material, with the base extending rearwardly over the material; the rear edge of the base having a recess therein defining end walls to limit sliding movement of the sawyers hand along the base; the recess further defining an inclined edge extending diagqnally relative to the guide strip, with the recess expos ng a e ion of h p c of ma fe manual grasping by the" sawyers hand; the g ide trip being petit o e ea rdly o the f r ard, edg of the se o pr an e e hanging ct on oi he bas for g asping bythe sam h nd o the sa yen RQEERT EDW R 17 REFEBENCES GI'IED The following references are of record in the file of this patent:

UNITED STATES PATEN TS Number Name Date 868,634 Bender Oct. 22, 1907 1,111,904 Kahrs Sept. 29, 1914 1,855,945 Denyer Apr. 26, 1932 2,205,095 acobs n .--1==--.-. Ju 9