US877651A

US877651A - Miter-box.

Info

Publication number: US877651A
Authority: US
Inventors: Jens Knudson
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-05-13
Filing date: 1907-05-13
Publication date: 1908-01-28
Anticipated expiration: 1925-01-28

Description

v PATENTED JAN. 28, 1908.

J. KNUDSON.

2 SHEETS-SHEET 1.

PATENTED JAN. 28, 1908.

J. KNUDSON.

MITER BOX.

APPLICATION FILED MAY 13. 1907.

2 SHEETSSHEET 2.

STAT

PATENT Q F Q-Ea;

JENS KNUDSON, OF nEs MQINES, Iowa.

man-Box.

To all whom it may concern: I fi Be it'known that-I, JENs KNUDSON, a c1t1- zen of the United States of America, and resident of Des Moines, Polk county, Iowa, have invented a new and useful Miter-Box, of which the following is'a specification.

The object of this invention is to provide im roved construction for miter boxes.

further object of this invention is to provide means for constructing a miter box 0 en at the front for the placing and. remova of 'material beneath the saw.

My invention consists 1n the construction, arrangement and combination ofelements hereinafter set forth, pointed out in my claims and illustrated by the accompanying drawin ,in which Tigure 1 is a plan of the com lete miter box in position for making a beve cut. Fig. 2 is an end elevation of the miter box in os1- tion to make a square cut. Fig. 3 is a ont elevation of the same, the saw removed, the

v dotted lines indicating posltions assumed by base fixed to and carried by

legs

11, 12.

arts 'in makin under-cuts and miter-cuts. ig. 4 is a detai section on the indicated line 44 of Fig. 3. Fig. 5 is a detail section illustrating certain structural elements. Flg. 6 is a detail section on the indicated line 6-6 of Fig. 1. Fig. 7 is a detail section on the indicated line 7-7 of Fig. 1.

In the construction of the miter box as shown, the numeral 10 designates a

bedmor e legs

11, 12 are arched intermediate of their ends and are adapted to rest upon or be fixed to a suitable support (not shown) such as a work bench. A semicircular plate 13 is fixed to the lower face of the bed or base 10 intermediate of the legs and the plane diametrical margin of said plate is flush with the rear margin of the base while the convex margin of the plate projects forward from the front mar in of the base. An ear 14 projects rearwardly from the center of the rear margin of the plate 13 and a lever 15 is fulcrumed on said ear by a bolt 16. The lever 15 extends across the plate 13 and projects at each end therefrom. A ca screw 17 is seated in the forward portion of the lever 15 and the head thereofoverlaps the curved forward margin of the plate 13 and is adapted to slide thereon. An ad usting screw 18 is seated in the lever 15 beneath and adapted for contact by the head of the cap screw 17, and said adjusting screw determines the degree of seating of the v Specification of Letters Patent; Application filed m 13.1907. Serial 1%. 378.320

Patented Jan. 28, 1993.

- the lever is held to the plate 13-. A latch 19 is fulcrumed at its'rear end on the lever 15 and extends forwardly beneath and nearly to the front end of said lever. Screws or

posts

20, 21 are seated in the lever 15 and extend downward on opposite sidesof the latch 19. A bar washer 22 is mounted loosely on the

screws

20, 21 and crosses beneath the latch 19. Expansive coil springs 23', 24 are mounted on the

screws

20, 21 between and impinging the heads of the screws and the bar washer 22. It is the function of the

springs

23, 24 to hold the latch 19 yieldingly against the bottom of the lever 15. A in 25 is mounted pivotall in the latch 19 and extends vertically throug an aperture in the lever 15 and through one or another of holes 26 in the plate 13. It is the function of the in 25 to lock the lever in any desired angle relative to the plate 13. A headed pin 27 is fixed in the outer end ortion of the latch 19 and extends loosely t on h an aperture in the outer end portion oft e lever 15. It is the function of the headed pin 27 to receive thumb pressure of the operator and depress the latch 19 sufficiently to withdraw the pin 25 from engagement with the plate 13 and permit an angular adjustment of the lever 15 relative to said plate. That portion of the lever 15 at the rear of the bolt '16 is formed as a journal and a sleeve 28 is mounted loosely thereon. Holes 29 are formed in the sleeve 28 and its journal (Fi 2 and 6) and a key 30 is mounted removab y, replaceabl and interchangeably in said holes to determine circumferential adjustment of the sleeve on the journal.

Guides

31, 32,

ends to and rise from the ends of the sleeve 28. The

guides

31, 32 are spaced'apart in the pairs and are connected rigidly by a crossbar 33 at their upper ends.

A saw-carrier is mounted slidingly in the guides 31', 32 and a saw 43 may be mounted slidingly in the carrier. The saw-carrier is constructed as follows:

Plates

34, 35 are arranged parallel with each other between and in contact with the inner faces of the guides '31, 32, andare connected at their upper and lowerends by

cleats

36, 37. Lugs 38 are fixed to the outer faces of the

plates

34, 35 and slidingly engage the adjacent margins of the

guides

31, 32 and steady the carrier in 'vertica movement in the guides. Sawguides 39, 46 are mounted horizontally arranged in pairs, are fixed at 'their lower transversely of the inner faces of the

plates

34, 35 and the end portions of said guides project from the front and rear margins of the plates and are slightly closer together than the centers thereof. The saw-guides 39, are arranged in pairs and the pair 40 may be adjusted to greater altitude by removing thescrews 41 from the holes. in which they are shown in the plates 34, 35 (Fig. 2) and raising the guides and replacing the screws in the holes 42 in said plates. is provision made for raising the guides to compensate for wear of the saw 43. The guides 39 S11 port and receive sliding engagement of t 1e back 44 of the saw and prevent downward movement of the saw independent of the carrier. The

guides

39, 40 on opposite sides of the saw maintain the blade parallel with

theplates

34, 35 of the carrier. A stop 45 is mounted adjustably on one of the guides 31 and is adapted to be engaged by and limit downward movement of the saw-carrier. A detent 46 is ivoted on the cross-bar 33 and is held'yieldlngly in one direction by a spring 47. A stud 48 on the cleat 36 is adapted to be engaged by the detent 46 to hold the carrier and saw in the uppermost limit of movement thereof,when the saw is not in use. The detent may be moved manually to release the stud 48 and permit the carrier and saw to descend for the use of the saw as shown in Fig.2. The sleeve 28 is further connected to its journal by a cap screw 49 seated in the rear end of said journal. Back-

plates

50, 51 are provided, of like construction, each late having one straight end and one beve end. The straight ends of the

plates

50, 51 are beveled back as shown in Fig. 1. The

back plates

50, 51 are secured to the base or bed 10 by cap screws 52 mounted through notches in the lower margins of the lates' and seated in the base. In the use 0' the miter box in cutting at right or acute angles with the saw and its carrier and guides u right, the

back plates

50, 51 are positione as shown with their straight edges near each other and spaced apart for the passage of the saw between them. When miter or under-cuts are to be made, the screws 52 are loosened and one or the other or both of the back plates are removed and interchanged or reversed and replaced and tightened by the screws 52 .with the inclined'ends of the plate or lates toward the center, as shown by dotted lines in Fig. 'Then the saw, carrier, and guides may be tilted in either direction to an angle of 45, by first removing the key .30 from the sleeve 28 and its journal and re lacing said key in the new the journal.

Work-holders are provided and are constructed as follows: A tubular screw 53 (Fig. 5) is seated in a hole in the base 10 adjacent the inner end of either of the

back plates

50, 51 and a pointed pin 54 is screwed through said tubular screw. The pin 54' is work on said base Thus 10 (Fig.7).

position to hold t e sleeve to that the Ipoint of the pin extends above the.

face of t e base and can engage a piece of and prevent slipping thereof. 7

Work-clamps are provided and are con-. structed as follows: A tubular cylindrical block 55 is formed with a notch adapted to receive the upper margin of one of the back- -

plates

50, 51 and a set screw 56 is screwed into the bore of said block from the rear and portion of the block 55. and is threadedthereto. The clam-p screw 57 may be turned manually and the lower end of saidscrew is provided with a loose bushing 58 adapted to engage and hold a piece of work 59 to-the base 10. A groove 60 is formed in and Iongitudinally o the lower face of the base 10 adjacent the back-

plates

50, 51 and a rod 61 may be mounted in said groove by longitudinal movement from either end and be locked therein by engagement of a set screw 62 in either of the

legs

11, 12.. A head 63 is mounted removably and replaceably on the outer end of the rod 61 and is adapted to be engaged by and sto the outer end of the piece of work 59.. his head is em loyed only when the work extends beyond the end of the base 10. When short pieces of work are being cut from a stick, the head 63 is removed from the rod and a return-arm 64 is attached to the outer end of the red by an elbow 64 and returns over the table or base A head 65 is mounted or formed on the inner end of the return-arm and engages the end of the stick from which short pieces are being cut. Through longitudinal adjustment of the rod 61- any desired length of material may be gauged relative to the plane of cutting by the saw 43'.

Other work holders may be'provided as follows: Transverse dovetail grooves 66, 67 may be formed in the base 10 and open to the top thereof. Blocks 68 are fitted to and arranged to slide in the grooves '66, 67 and screws 69 and threaded in and extend through said blocks. The screws and blocks are adjusted so that the-forward margin of the work is engaged by the screws, and then the screws are advanced slightly and enga e the bottoms ofthe grooves 66, 67 and lit the blocks into rigid engagement with the inclined upper walls of the grooves. I claim as my invention 1. A miter box, comprising a base, a lever relative to said 2. A miter box, comprising a base, a lever fulcrumed for oscillation on said base, means for latching said lever to said base, a guide frame mounted for rotary adjustment on said lever and located wholly at the rear of said base, a saw-carrier slidingly mounted on'said guide frame, means for locking said saw-carrier in said. guide frame, and horizontal saw-guides in said saw-carrier.

3. A miter box, comprising a base,

cillation on said base, a semicircular plate projecting forward from said base, a latch connecting said lever and plate, a sleeve mounted or rotary adjustment on the rear end of said lever, yokes fixed to and risin from said sleeve, plates mounted for vertica adjustment in said yokes and located wholly at the rear of said base, means for locking said plates in said yokes, and saw-guides be- 4. A miter box, comprising a base, legs carrying said base, screws seated in and projecting rearward fromsaid base, back plates formed with mar inal notches embracin said screws, said ack plates each formed with a square end and a beveled end adapted tobe removed and reversed and replaced screws, a lever fulcrumed for oscillation on said base, a guide frame mounted for rotary adjustment on the rear end of said plates.

screws, a block formed with a transverse said lever and wholly at the rear of said base, a saw-carrier slidingl mounted on'said guide ing said saw-carrier in said guide frame, and horizontal saw. guides in said saw-carrier.

5. A miter box, comprising a base, legs supporting the base, a semi-circular plate mounted beneath. said base and apertured in its forward curved margin, a lever fulcrumed on'said plate, a latch on said lever, a pin on said latch engaging in one or another of the apertures in said plate, said latch springheld in one direction and adapted for manual 'actuation in the opposite direction, a'sleeve mounted for rotary adjustment on the rear 'end of said lever, yokes fixed to and rising from said sleeve, plates mounted slidingly between said yokes, means for latching said plates in their uppermost position, and horizontal saw guides-between and .carried by 6., In a miter box, a base, screws mounted in and projecting rearward from said base, back plates formed'with notches in their lower margins embracin said screws, each of said back plates forme with a square end and a beveled end-and adapted to be re-- moved, reversed and replaced relative to said legs carrying said base, a lever fulcrumed for os,-

groove in its lower face adapted to removably embrace and engage either margin of either back plate, a set screw mounted lon itudinally of said block and intersecting tie groove therein and adapted toengage the ack plate, and a clamp-screw extending throu h said block in front of andparallel with t e back plate.

7. In a miter box, a base, screws seated in said base, and back plates formed with marinal notches embracing said screws, said ack plates each formed with a square end and a beveled end and adapted to be removed and replaced and reversed relative to said screws.

8. In. a miter box, a base screws seated in and projecting horizontally from said base and back plates formed with marginal notches removably and replaceably mounted on said screws, said back plates each formed with one straight end and one inclined end, thus adapting said plates for adjustment in reversed positions relative to the screws.

9. In a miter box, a lever mounted for oscillation, a guide frame mounted for rotary adjustment on saidlever, a saw-carrier slidingly mounted in said guide frame, a detent on said frame and a stud on said carrier adapted to be enga ed by said detent- 10. In a miter I 0x, a ournal, a sleeve loosely mounted thereon, saidsleev e and journal formed with registering apertures, a

key in said apertures, a guide frame fixed to said sleeve, a saw-carrier slidingly mounted in said frame, and means for latching said carrier to said frame.

1 1. In a miter box, a lever, a sleeve mounted for rotary adjustment on said-lever, yokes embracin and fixed to' said sleeve, plates mounted etween the arms of said yokes and means for adjusting said plates vertically in said yokes.

1 2. In a miter box, a lever, a sleeve mo unted for rotary adjustment on said lever, yokes embracing and fixed to said sleeve, plates slidingly mounted betweenthe arms of said yokes, guides mounted transversely ofand between said plates, andmeans for limiting vertical movement of said plates and guides.

13. In a miter 'box a base, tubular screws mounted in said base, and pointed pins.

screwed through the bores of said tubular I screws.

Signed by me at Des Momes, Iowa, this