US495192A - Sheet-metal press - Google Patents

Description

J. BARTLB SHEET METAL PE No. 495,192. Patented Apr. 11,1893.

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(No Model.) 3 Sheets-Sheet 2. -J. BARTLETT.

SHEET METAL PRESS.

No. 495,192. Patented Apr. 1l, 1893.

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UNITED STATES PATENT OFFICE.

JEREMY BARTLETT, OF COLLINS, NEW YORK.

SHEET-METAL PRESSl SPECIFICATION forming part of Letters Patent No. 495,192, dated April 11, 1893.

Application tiled August 13, 1892.

To all whom t may concern,.-

Be it known that I, JEREMY BARTLETT, a citizen of the United States, residing at Collins, in the county of Erie and State of New York, have invented certain new and useful Improvements in Sheet-Metal Presses; and I do hereby declare the following to be a full, clear, and exact description 'of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to figures of reference marked thereon, which form a-part of this specilication.

My invention relates to improvements'in stamping machines and more particularly in a machine for printing cutting and bending tin-tags. Its object is to provide a stamping machine for the above purpose which is compact in form rapid and precise in its operation, the stock being fed into the machine and thewaste material being drawn therefrom by a system of rollers in such a manner as to make the operation entirely automatic.

Itconsists in the novel and peculiar arrangement and details of its construction, all of which I will now proceed to definitely describe and then point out in the claims.

In the drawings, Figure 1, is a front elevation of a stamping machine equipped with my improvement. Fig. 2, is an enlarged top plan View of the bed-plate upon which the female die is secured and the printing and feedingV devices are arranged. Fig. 3, is an end view of the same, and Fig. 4, is a side View of the same. Fig. 5, shows an adjustable eccentric employed in regulating th e feed rollers. Figs. 6, 7 and 8, are detail views showing the operation of a second die or punch arranged to bend the tag after it has been printed and cut. Figs. 9 and 10, are a top plan view and sectional View respectively of the female die. Fig. 11, shows a tin-tag printed, cut and bent according to the construction shown in drawings. Fig. 12, is a detail section View of the print roller showing a spring pressed pin employed in feeding the stock to the machine.

Referring to the drawings, 1 is the base or frame of the machine over the top of which the bed-plate 2 is secured by the bolts 3.

Secured to the rear of the frame 1, and projecting over the bed-plate 2, is the metallic ' lower rollers 30 and 31.

Serial No. 442,978. (No model.)

Y4 is mounted the horizontal shaft 5, in the journal boxes 6. 6. having the balance wheel 7, mounted upon one end and the brake 8 mounted at its opposite end. This brake 8, consists of a rigid pulley wheel 9, mounted upon the shaft 5, and encircled by a stationary metallic band 10, which is adjusted to and from the'pullcy by the thumb-screw 11.

Centrally arranged upon the shaft 5, is the crank pin 12, to which the connecting arm 13, is secured for operating the cross-head 14, which travels in theslidesl. (Theconstruction as far as Aabove described is of old and well known form in the manufacture of stamping machines.) Within this cross-head 14, which is employed in operating the male die 16, I have arranged a second die or punch 17. This punch 17 rests within the male-die 16, and has an annular collar at its upper end which is employed by a spiral spring 18, which holds the punch 17'against the horizontal pin 19, see Figr. This pin 19, is reciprocated in a vvertical direction (Within the opening 20), by the vertical rods 21, secured to each end thereof. The vertical rods 21 travel in grooves 22, arranged at the sides of the cross head and are carried downwardly bythe cams 23, mounted upon the shaft 5, the rods being raised after they are released from the cams 23 by the short fiat springs 24, secured to the base of the cross-head. The cams 23 are made adjustable and are constructed as shown in Fig. 8.in the following mannerz The body of the cam consists of a circular disk centrally mounted upon the shaft 5, and having a projection 25, secured to its periphery and into this -projection 25, is threaded the short adjusting screw 26.

Upon the bed-plate 2 and directly beneath the male die 16, is adjustably secured the female die 27. bythe adjusting bolts 28. This die 27, is. arranged as shown in Figs. 9 and 10, the metal first being cut as shown in the upper View of Fig. 1l, and then being forced through the die by the punch 17, bending its prongs or points as shown in the lower View of Fig. 11.

Directly to the front and rear of the femaledie 27, are mounted the feed rollers which consist of the two upper rollers 29 and the The lower rollers 30 ICO and 31, are connected by the gear wheels 32, (see Fig. 4.) which are so arranged as to have them act in unison and at the same rate of speed. The shaft 33, upon which the roller 30 is mounted has a gear-Wheel 34, mounted upon its opposite end Which engages'with thegear 35, mounted upon the top of the bed plate 2. This gear 35, is operated by the eccentric 36, which consists of the following construction, (see Fig. 5.)

Adjustably secured in the opening 40, cut in the disk 37, is the collar 38, which consists of two plates screwed together on either side of the disk through which the shaft 5 passes. When it is desired to increase or diminish the stroke of the eccentric rod 39, the collar or sleeve 38 is adjusted within the opening 40, to and from the center of the disk by the setscrews 41, which are threaded into the periphery of the disk. The lower end of the eccentric rod 39, is pivoted to a short lever 42, as shown at 43 Fig. 4. This short lever 42, is mounted upon a small shaft 44, together with the gear 35, and a ratchet wheel 45. At the outer end of the short lever 42, are arranged the spring-pressed pawls 4G, which engage with the ratchet wheel 45. It wiil be seen thatin having the pawls 45 arranged as shown in Fig. 4, (one slightly in advance of the other,) little or no motion is lost one of the pawls always engaging with the ratchet wheel immediately at the end of each stroke.

Upon the periphery of the roller 30, I have arranged a series of type which I have herein shown as representing the letterB but Which might be changed to any desired character. By this means I am able to print the stock as it is being fed into the machine the characters receiving their ink from a small spring pressed ink roller 47, loosely mounted under 'the roller 30.

In Fig. 12, is shown a detail view of a spring pressed pin 48, against Which the stock is placed before feedingitinto the machine. By this means the stock is fed into the machine so as to have little or no Waste further than the configuration of the character Would require.

In operation the characters are first arranged upon the roller 30, so that their imprint upon the stock will rest directly over the female die 27, when the feed is not in opel'ation and the feed is adjusted by the eccentric 36, above described carrying the stock successively so as to present each successive character over the die 27, at each stroke of the eccentric rod 39. The parts being now adjusted, the end. of the stock is placed against the spring pressed pin 43, and fed between the feed rollers 29 and 30, which are given an intermittent rotary motion by the eccentric 36. The stock is then printed upon its under side by the roller 30, and as the rst character rests over the female die the punch 16, descends cutting out the tag 50 immediately after which the cams 23 act against the rods 21 which cause the punch 17 to descend forcing the printed and cut tag 50 through the die 27, bending its prongs in the desired direction. The waste stock is then carried off between the rollers 29 and 31.

It will be seenthat a machine constructed according to myinvention is not confined eX- clusively to the manufacture of tin-tags but mightbe employed in other instances where it is desirable to obtain an accurate intermittent feed. 'f

l. The herein described stamping machine provided with a system of feed rollers between which the metal to be stamped passes, the surface of one of the rollers being arranged to print the metal passing over it and a cam mounted upon the power shaft of the press arranged to transmit an intermittent rotary motion to the feed roller substantially as shown and described.

2. The herein described stamping press consisting essentially of the base 1. bed plate 2, bracket or frame 4, in which the shaft 5 is mounted, the cross head 14, operated by the shaft 5,and connecting arm 13, the hollow die 16, punch 17, resting within the die and operated by the cams 23. the eccentric 36 connected to the ratchet 45, arranged to give an intermittent rotary motion to the gear 35 and the gear 35 engaging with a system of shafts and gears so as to transmit its motion to the feed rollers 29. 29. 30 and 31 the roller 30 being provided with a series of types for printing the stock as it enters the machine the whole arranged and operating substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JEREMY BARTLETT.

Witnesses:

O. E. HoDDioK, WV. W. BAILEY.

IOC

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