US1955350A

US1955350A - All way cutting machine

Info

Publication number: US1955350A
Application number: US498980A
Authority: US
Inventors: Sweet Albert Leverett; Charles L Field
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-11-29
Filing date: 1930-11-29
Publication date: 1934-04-17
Anticipated expiration: 1951-04-17

Description

April 17, 1934. A 1 SWEET ET AL ALL WAY CUTTING MACHINE Filed Nov. 29, 1930 2 Sheets-Sheet 1 n n mm mN NM LILJ ieZcZ Apsrfii 17, 1934. A SWEET ET AL ALL WAY CUTTING MACHINE Filed Nov. 29, 1930 2 Sheets-Sheet 2 Patented Apr. 17, 1934 UNITED STATES PATENT OFFIQE AlbertLeverett Sweet and Charles L. Field, Yakima, Wash.

Application November 29, 1930, Serial No. 498,980

15 Claims.

This invention relates to cutting machines designed for the purpose of cutting ornamental and other designs through such materials as paper, sheet metal, leather or wood and particularly to machines of this character in which the cutting is performed by a reciprocating cutting knife acting as a combination chisel and knife cutter.

A further object is to provide a machine of this character which is very simple, readily operated and which is compact and portable and which will either cut straight downward in a plane perpendicular to the plane of support or on any desired bevel up to 45 and in which the cutting knife may be guided along any given straight line, curve or circle.

A further object is to provide a machine of this character in which the depth of cut may be adjusted and which is operated by an electric motor.

29 The invention is illustrated in the accompanying drawings, wherein:--

Figure l is a vertical sectional view of our improved cutting machine, the motor casing being in elevation;

Figure 2 is a section on the line 22 of Figure 1;

Figure 3 is a section on the line 33 of'Figure 1;

Figure 4 is a section on the line 4-4 of Figure 3;

Figure 5 is an under side view of the base of the machine, and

Figure 6 is a side elevation of the cutting knife and chuck therefor, the chuck being partly broken away.

Referring to these drawings, it will be seen that this machine is mounted upon a base 10, the under face of which is shown in Figure 5. This base at one end is provided with the up- 40 wardly projecting stud 11 having a knob-like handle 12, the other end of the base being cut away at its middle as at 13. The under face of the b se is formed with the longitudinal grooves 14. Extending upward from the base is the short a bearing 15 upon which the remainder of the mechanism is mounted. Disposed to embrace this bearing is a supporting block 16 which extends down at the forward and rear ends of the bearing and through this block passes the tapering pin 17 which is screw-threaded at one end for engagement with the nut 18. By loosening this nut, the block 16 may be oscillated in one direction or the other and then by tightening: up this nut, the block may be held in its angularly adjusted position.

Mounted upon this block and supported thereby is a motor casing 18, this being held upon the block by screws 19. This casing at one end is closed by a detachable head 20 and through this head passes the motor shaft 21' mounted in bearings in the rear end of the motor casing and in the head 20. This motor shaft carries upon its end the crank disk 21. Disposed upon the head 20 is a cutter carrying head 22 rectangular in elevation having its rear wall provided with a central opening through which the hub of the head 20 passes and through which the shaft passes. This head 22 is hollow and is held to the head of the motor casing by means of the screws 23. The outer face of this head 22 is closed by a plate 24 held in place by two screws 25. By removing one of these screws, the plate 24 may be turned upon the other screw to disclose the in terior of the head 22.

Operating within the head 22 is a slide or yoke 26 which has a length equal to the interior width of the head 22 and at one end has an outwardly projecting flange or rib 2'7 which extends through a slot 28 formed in one side wall of the head 22. Thus this slide 26 is guided for movement parallel to the length of the head. The slide 26 is formed with an opening 28 through which the upper section 29 of a reciprocatable rod or cutter shank passes. The wall of this opening 28 is split at 30 to the side of the slide and the clamp screw 31 passes through the material on one side of this slit and into the material on the other side of the slit whereby the cutter shank may be clamped within the slide. The opening 28 is screw-threaded and the cutter shank 29 is screw-threaded so that by rotating the shank, the tool may be raised or lowered. The rear face of the slide 26 is formed with the transversely extending arcuate groove 32. The crank disk 20 has an outwardly projecting pin 33 carrying a roller 34 which operates within this arcuate groove 32; It is, of course, obvious that. as the motor shaft is rotated, the crank 21 will cause a reciprocating motion to be transmitted to the slide or yoke 26 and this will be transmitted to the cutter shank and cutter. The cutter shank and'cutter are constructed as shown in Figure l of an upper section 29 previously referred toand a lower section 35. The upper section is screw-threaded at 36 to engage with the interior screw-threads of the opening 28. This upper section at its lower end has swiveled engagement with the section 35, the upper section to this end being formed with the bulbous head37 insertable into a socket in the lower section, there being a pin 38 extending through the socket and engaging the constricted neck of this head 37. Thus the upper section 29 may be rotated relative to the lower section 35. This lower section 35 is provided upon its exterior face with the longitudinally extending groove 39. The upper end of the upper section 29 extends through an opening in the upper end of the head 22 and into a removable tubular cap 40. The lower section extends through a bushing 41 which has screw-threaded engagement with the wall of an opening in the lower end of the head 22, this bushing having a knurled head 42 whereby it may be rotated and having an inwardly projecting pin 43, the inner end of which engages within the groove 39, thus preventing any rotation of the lower end of the tool spindle or shank but permitting the reciprocation of this shank. The bushing 41 is held in place on the inside of the head 22 by means of a lock nut 44. Extending through the lock nut 44 is a set screw 45. This structure provides for a rotative adjustment of the bushing 41 and of the lower section 35 of the cutter shank. By loosening the lock nut 44, one quarter of a turn on the bushing, and then holding this look nut in its loosened position by the set screw, the lower section 35 is free to rotate with the bushing 41 to set the cutter carried by this lower section 35 at any desired angle. Then by again loosening the set screw 45 and tightening the nut 44, the bushing 41 will be locked in this adjusted position. Where beveled cutting is to be done, the lower section 35 should always be adjusted with the cutting tool disposed in a plane parallel to the length of the machine. The lower end of the section 35 is split or otherwise formed to provide a chuck 46, this chuck being contractible by means of the usual cap nut 47 and adapted to eral edges 50.

Preferably the forward end of the large fiat base 10 is provided with the two handles 51 having the form or" plane handles extending upward and slightly rearward.

In the use of this machine, when it is desired to cut vertically and not on a bevel, the cutter blade 48 may be disposed in any desired plane, either a plane at right angles to the length of the machine or a plane parallel to the length of the machine or in intermediate plane by 7 loosening the collar or nut 44 and rotating the bushing 41 with the lower section 35 of the shank and then again locking the bushing from rotation by means of the lock nut 44. If it be desired to adjust the shank vertically with relation to t -e head 22, the face plate 24 may be swung to an open position and then the shank section 29 rotated to raise or lower the shank section through the screw-threaded aperture 28, the screw 31 being first loosened.

The cap or housing 40 constitutes a bearing or guard for the upper section of the shank. This housing is removed when adjusting the cutter stroke. When it is desired to cut on a bevel, the lower section of the shank is rotatably adjusted until the flat face of the cutter is disposed parallel to the length of the machine. Then the nut 18 is loosened and the motor supporting block 16 oscillated upon the pin 17 to the desired angle as shown in Figure 2 and then the nut 18 is again tightened, holding the block and motor in this position with the shank and the cutter disposed at an angle to the vertical plane. The whole structure is designed to be moved over the work, the cutter following the line of the design and the out being made obviously by the reciprocating movements of the cutter. The cutter is so formed as to leave a clean, smooth and precise edge on all the material cut. This is due to the particular shape of the cutter. The cutting blade cuts through material on a down stroke while the edges of the cutter being rounded exert a shearing stroke on the material, thus leaving a clean, smooth edge. This device may be used with a template as a guide or may be caused to follow the line of the design. While we have illustrated a certain embodiment of our invention, we do not wish to be limited thereto as it is obvious that many changes might be made therein without departing from the spirit of the invention as defined in the appended claims.

Having thus described the invention, what is claimed as new is:

1. A cutting device, comprising, in combination with a frame; a reciprocable rod being so attached to the frame that it can be adjusted to Various angular positions on it; a ram knife attached to the free end of said rod; and means for reciprocating the said rod.

2. A cutting device, comprising, in combination with a frame, a casing supported by the frame and being so attached to it that it can be adjusted to various angular positions, an electromotor located in said casing, a reciprocable rod attached to said casing, a ram knife attached to the free end of said rod, and means for transmitting the rotary motion of said motor into reciprocating motion of said rod with its knife.

3. A cutting device, comprising, in combination with a frame, an axle carried by said frame, a casing carried by said axle and being turnable thereon, an electromotor located in said casing, a reciprocable rod attached to said casing, a ram knife attached to the free end of said rod, and means for transmitting the rotary motion of said motor into reciprocating motion of said rod with i its knife.

4. A cutting device including a base, a support pivotally mounted on the base for movement around a horizontal longitudinal axis, means for holding the support in adjusted position around support, a crank mounted thereon, a reciprocatable yoke having a transverse slot with which the crank engages to reciprocate the yoke, guides within which the yoke reciprocates, and a ram knife attached to a, shank engaged by and reciprocated by said yoke.

6. A cutting device including a base, a support mounted on the base for adjustment around a horizontal axis on the base, a driving shaft mounted on the support and having a crank thereon, a hollow head mounted upon the support for adjustment therewith and into which the crank projects, a yoke mounted for reciprocation within the head, the yoke having a transversely extending groove with which the crank pin engages, and a ram knife attached to a shank exa... no

tending through the upper and lower ends of the head and extending through said yoke.

7. A cutting device including a base, a support pivotally mounted on the base for adjustment around a horizontal axis, a driving shaft carried upon said support and having a crank at one end, a hollow head operatively mounted upon the support for adjustment therewith and into which the crank projects, a yoke mounted within said head for reciprocating movement and having a slot with which the crank pin engages, a ram knife attached to a shank extending through the upper and lower ends of the head, the shank extending through and having screw-threaded engagement with the yoke whereby as the shank is rotated in one direction or the other, the shank will be vertically adjusted relative to the yoke, the shank being composed of two sections having swiveled engagement with each other, the lower section carrying the ram knife, and means for holding the lower section from rotation relative to the head.

8. A cutting device including a base, a sup port pivotally mounted on the base for adjustment around a horizontal axis, a driving shaft carried upon said support and having a crank at one end, a hollow head operatively mounted upon the support for adjustment therewith and into which the crank projects, a yoke mounted within said head for reciprocating movement and having a slot with which the crank pin engages, a ram knife attached to a shank extending through the upper and lower ends of the head, the shank extending through and having screw-threaded engagement with the yoke whereby as the shank is rotated in one direction or the other, the shank will be vertically adjusted relative to the yoke, the shank being composed of two sections having swiveled engagement with each other, the lower section carrying the ram knife,

and means for holding the lower section from rotation relative to the head comprising a bushing rotatably mounted within the lower end of the head and through which the lower section of the shank passes, the bushing and shank having sliding non-rotative engagement with each other, and means for clamping the bushing against rotation within the head, said means permitting the bushing to be adjusted to adjust the lower section of the shank.

9. A cutting device including a base, a motor support mounted on the base for adjustment around a horizontal axis on the base, a motor on the support and having a longitudinally extending shaft, a crank thereon, a hollow head mounted upon the casing of the motor within which the crank projects, a yoke having sliding engagement with the head for longitudinal movement, the yoke having a transversely extending upwardly curved arcuate groove in one face and with which the crank pin of the crank engages, the yoke having a screw-threaded aperture, a tool shank formed in two sections, the upper section being swiveled to the lower section, the upper section having screw-threaded engagement with the aperture in the yoke and extending upward through the upper end of the head, means for locking the upper section of the shank in any adjusted position in the yoke, a bushing in the lower end of the head and through which the lower section of the shank passes, the lower section of the shank and said bushing having non-rotative sliding engagement with each other, the bushing being rotatably adjustable in the head, means for locking the bushing from rotation after adjustment, and a cutter detachably carried by the lower section of the shank.

10. In a cutting device of the character described, a reciprocatable ram knife, the lower edge of the knife being sharpened and at right angles to the longitudinal axis of the knife, the lateral edges of the knife being outwardly and upwardly curved and then inwardly and upwardly curved, said curved edges being sharpened.

11. A cutting device of the character described including a frame, a reciprocatable rod mounted on the frame for adjustment to various angular positions, and a ram knife attached to the free end of said rod, the ram knife being rotatively adjustable axially of said rod.

12. A cutting device including a base adapted to rest flat against the work to be cut and having a handle whereby it may be pushed and guided, a motor support mounted on the base whereby the motor support may be tilted in one direction or the other, a reciprocatable cutter operatively mounted on the motor support for movement therewith, and means operated by the motor for reciprocating said cutter.

13. A cutting device including a base adapted to rest fiat upon the work and having handles whereby it may be guided over the work, a motor support pivotally moimted upon the base for tilting movement in one or the other direction, a motor mounted upon said support and having a shank, a head carried by the casing of the motor, a reciprocatable cutter shank mounted in said head, means engaged by the motor shank for reciprocating said cutter shank, a ram knife carried by the lower end of the cutter shank, and means whereby the ram knife may be adjusted into a position with its edge at right angles to the motor shaft or parallel to the motor shaft or into any intermediate position, the cutter having a flat chisel edged blade.

14. A cutting device including a base, a support mounted on the base, a driving shaft mounted on the support and having a crank thereon, a hollow head mounted upon the support, into which the crank projects, a yoke mounted for reciprocation in the head with which the crank pin operatively engages, and a ram knife having an attached shank formed in two sections having swiveled engagement with each other, the shank extending through the upper and lower ends of the head and the upper section of the shank having screw-threaded engagement with the yoke whereby the shank of the ram knife may be adjusted through the yoke without rotating the ram knife.

15. A cutting device including a base, a support mounted upon the base, a driving shaft mounted on the support, a hollow head mounted upon the support, a yoke mounted for vertical reciprocation within the head, a shaft extending into said head and carrying means engaging the yoke whereby the yoke shall be reciprocated upon a rotational movement of the shaft, a ram knife having an attached shank extending through the upper and lower ends of the head and extending through said yoke, the yoke having a central passage for the shank of the ram knife and being split, the split extending into said passage, and means for adjusting the walls on each side of said split portion toward or from each other to thereby clamp the shank to or unclamp it from the yoke.

ALBERT LEVERETT SWEET. CHARLES L. FIELD.