US2178938A - Cutting machine - Google Patents

Description

NOV. 7, 1939. Y A; OHMSTEDE 2,178,938

CUTTING MACHINE l yFiled March l550,-1938 4 Sheets-Sheet l FVG,

Off/$7505 Y JNVENToR.

ATTORNEYS.

Nov. 7, 1939y A. oHMsTEDE i 2,178,938

CUTTING MACHINE Filed Maren so, 1958 4 sheets-sheet 2 /4 OHMSTEDE IN VEN TOR.

ATToRNEx/s.

A. OHMSTEDE CUTTING MACHINE qfiled March 30, 1938 Nov. 7, 1939.

4 Sheets-Sheet 3 4 Off/757555 INVEMTQR.

ATTORNEYS.

Nov. 7, 1939. A. oHMsTDE CUTTING MACHINE Filed March 30, 1938 4 Sheets-Sheet 4 IN VEN TOR.

ATTORNEYS.

Patented Nov. 7, 1939 rhis invention discloses, in a cutting machine of the torch type, novel means whereby the machine can be operated conveniently, and novel means for constraining the torch to follow a pattern.

In the accompanying drawings:

Figure l is a perspective `view of a cutting machine wherein the invention is embodied;

Figure 2 is a side elevation of the machine;

Figure 3 is a side elevation showing a portio of the motor and attendant parts;

Figure 4 is an end elevation of the structure depicted in Fig. 3;

Figure 5 is a top plan wherein superior parts are sectioned away and inferior parts omitted;

Figure 6 is a section on the line 6 6 of Figure 5;

Figure '7 is a side elevation partly in section showing a means for holding the guide roller in Contact with the edge of the pattern;

Figure 8 is a top plan of the mechanism illustrated in Figure 7. k

In carrying out the invention there is provided an arcuate supporting base l, on which is mounted a vertical pedestal 3. An inner arm 6 is mounted on the pedestal 3 for horizontal swinging adjustment. The numeral 8 designates an outer arm, hingedly connected at 9 to the inner arm 5 for horizontal swinging adjustment.

The numeral iB designates a cutting torch mounted in the outer end of the arm 8 for vertical adjustment through the instrumentality of a rack and pinion mechanism H-l2, whereby the torch may be moved to and from the blank B. to be cut.

A pattern supporting frame IS is mounted for horizontal swinging movement on the upper end of the pedestal 3, and is held in adjusted position by a set screw Il. The frame i6 carries a collar 23 in which a depending, vertcally-adjustable standard 24 is mounted, and the standard is held in adjusted position by a locking mechanism 25 on the collar 23. The lower end of the standard 2t has a reduced stem 26, on which a pattern 21 may be held by a lock nut 23.

An electric motor 29 is adjustable inwardly and outwardly upon tracks 31B on the arm 8. The motor 29 is adjusted inwardly and outwardly by means of a shaft 3l rotatably mounted in ears 32 on the arm 8, the shaft being connected by a crank arm 33 and a link 34 to a bracket 35 on the base 39 of the motor29. An elongated operating handle 36 is secured to one end of the shaft 3l, and extends forwardly beyond the electric motor 2S. By means of the handle 3B and associated parts, the motor 29 may be adjusted in or out on the arm 8. A locking device 31, carried by the arm cooperates with notches 33 in the base 39 of the motor 29, to hold the motor in v adjusted position. n

Mounted upon the motor base 3Q, is a clutch housing fill, in which alined shafts di and t2 are journaled. The shaft 412 is driven by the motor it, through a worm 43 on the motor shaft and a pinion itil on the shaft d2. A clutch mechanism 65 connects the shafts 4I and 52. The lower member of the clutch mechanism 45 is vshifted into and out of engagement with its fellow by a common means, including a short lever 38 fulcrumed intermediate its ends on the housing 30. 15 A knurled follower roller i9 is secured to the shaft di and is adapted to engage the edge of the pattern 2l. When the motor 29 is operated, the roller i9, following the pattern 2l, will cause the torch it to cut a corresponding outline inthe blank B, the roller being kept manually in connect with the pattern.

In Figures 7 and 8, parts hereinbefore described are designated by numerals already used, with the suiX a. Figures 7 and 8 show a mecha- 25 nism for holding the roller l2 in contact with the pattern 13. Arms 6l and 63 are pivotally connected at i liti and pulleys 69 and l@ are connected by a resilient belt lt. The pulley lll is mounted upon the shaft Alid., and the shaft carries the v aforesaid roller l2, which is adapted to engage the edge of the pattern 73. A second roller l@ is mounted upon the shaft 'i5 of the pulley t9, the shaft being carried by the arm 5l. The roller iti engages a track iii secured to the pattern i3, the roller 'M rotating with the pulley GQ.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

l. In a cutting machine of the class described, a base, a pedestal carried by the base, pivotally connected inner and outer arms, the inner arm beingr mounted for swinging movement on the pedestal, a supporting frame mounted on the pedestal above the arms, a pattern holder carried by the frame, near the outer end thereof and below the frame, in spaced relation to the pedestal, a motor mounted on. the outer portion of the outer arm for sliding movement longitudinal.- ly of said arm, a clutch housing carried by the motor and disposed outwardly of the motor, upper and lower shafts journaled in theA clutch housing, a driving connection between the motor andthe lower shaft, a follower carried bythe upper shaft and traversing the edge Aof a pattern carried by the pattern holder, a clutch in the clutch housing and connecting the shafts, means for sliding the motor and means for actuating the clutch, each of said means including a part under the immediate control of an operator, both of said parts extending outwardly to places closely adjacent to the outer end of the outer arm, the pattern holder being located accessibly adjacent to the outer end of the outer arm, whereby both of said parts, and the pattern holder, may be reached conveniently by an operator at the outer end of the outer arm.

2. In a cutting machine of the class described,

porting the arms for movement circumferentially 10 of the pattern.

AUGUST OHMSTEDE.

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