US2020615A - Safety or nonrepeat attachment - Google Patents

Description

J. M. MINKOW SAFETY 0R NONREPEAT ATTACHMENT Nov. 1 2, 1935.

Filed Dad. 4, 1954 2 Sheets-Sheet l Nov. 12, 1935. J. M. MINKOW 2,020,615

SAFETY OR NONREFEAT ATTACHMENT Filed Dec. 4, 1934 2 Sheets-Sheet 2 '1 k Jz 4 31/ 50 x 3mm Julius/K245127201 Patented Nov. 12, 1935 UNITED STATES PATENT OFFICE Julius M. Minkow, New York, N. Y., assignor to Robert Minkow, New York, N. Y.

Application December 4, 1984, Serial No. 755,966

Claims.

This invention relates to a safety or non-repeat attachment for the cutter bar of a paper cutting machine.

It is well known that in various forms of paper 6 cutting machines a braking element is employed for maintaining a cutter bar stationary in an elevated position, after it has performed its cutting function, to allow for the feeding of stock or for removing work acted upon and for posi- 10- tioning work to be acted on; but at times this braking element does not function to maintain the cutter bar elevated whereby the latter repeats its downward stroke resulting in injuring the operator or damaging the machine. It is the aim of this invention to prevent this repeat stroke of the cutter bar to overcome the objection as aforesaid, and to this end, the invention consists of providing, in a manner as hereinafter set forth, a safety or non-repeat attachment for 2.0. cutting machines which acts to hold the cutter bar in its elevated position when occasion requires.

Further objects of the invention are to provide, in a manner as hereinafter set forth, a safety or non-repeat attachment for a cutting bar which is simple in its construction and arrangement, strong, durable, compact, thoroughly efficient in the use intended thereby, readily installed with respect to a cutting machine without stripping the latter in any manner, and comparatively inexpensive to manufacture.

To the above ends essentially and to others which may hereinafter appear, the attachment consists of such parts and such combination of parts which fall within the scope of the invention as claimed.

In the drawings:

Figure 1 is a side elevation of a cutting machine showing the adaptation therewith of the attachment in accordance with this invention,

Figure 2 is a front elevation of the attachment showing the adaptation thereof with respect to the machine and further illustrating the attachment in active position and in inactive position in full and dotted lines respectively, and

Figures 3, 4, 5 and 6 are longitudinal sectional views illustrating the various positions of the cutter bar arrester, holder or stop element with respect to the housing of the latter, and with Figure 4 upon line 4-4, Figure 3.

5,0 Withreference to the drawings, one of the frame sides of a cutting machine is designated 8. The cutter bar structure of the machine is indicated at 9 and which is operated at its ends, only one shown, from eccentrics It), only one shown,

55 driven from a shaft l I. The main drive shaft of the machine is indicated at l2 and extends through and outwardly from frame side 8. The extended end of shaft I2 is designated at I3 and has mounted thereon a driving fly wheel Hi.

The attachment is arranged on the outer side 5 face of frame side 8 and it includes a vertically disposed rectangular abutment block l5 anchored by the holdfast means [6 to one side ll of one end l8 of the structure 9. The block 15 is arranged between the edge 19 of side I! and the vertical median of the latter and between the transversemedian and upper end of side IT. Secured against the outer face of frame side 8 between the transverse median and upper end of the latter isa tubular housing 20 which opposes and 15 is of a length less than the width of side H. The inner end of housing 20 is oppositely flanged, as at 2|, and through the said flanges extend the holdfast means 22 for anchoring housing 29 to frame side 8. The housing 20 extends at right 20 angles to frame-side 8. The housing 29 provides an annular. chamber 23 which'is open at itsouter end and has its inner end closed by frame side 8. One side of housing'20 is formed with a slot 24 disposed lengthwise thereof and of a length holder" or stop element 25, hereinafter termed a stopelement consisting of ahollow member 26 of cylindrical contour having a sliding snug fit with thewall of chamber 23. The member 26 is of less length than that of housing 20 and its normal position is as shown in Figure 3, extending from 35 the outer end of. chamber 23. The member 26 is formed with closed ends 21, 28 and a slot 29 in one side which aligns With slot 24. The slot 29 extends from the end 28 of member 26 and terminates substantially at the vertical median of the 4 latter. The element 25 includes a slidable block 30 of less length than and arranged in member 26. Interposed between the end 27 of member 26 and the outer end of block 30 is a controlling spring 3| normally tending to maintain block 30 5 against the inner face of the end 28 of member 26. Anchored to the rear end of block 30 and extending outwardly through slots 24 and 29, as well as projectingfrom slot 24 is a shifting pin 32 for and common to member 26 and block 30. The pin 32 is disposed at right angles to housing 20 and it is operated by a means to be referred to, for the purpose of positioning the element 25 is the path of block IE to arrest the downward movement of or to prevent a repeat stroke of the structure 9. The pin 32 also functions to shift element 25 clear of the path of block |5.

The means for operating pin 32 includes an upstanding two-arm lever 33 having its arms designated 34, 35. The arm 34 is of less length than and is disposed at an inward inclination with respect to arm 35. The arm 34 has its upper part 36 disposed at an angle with respect to the lower part thereof. The part 36 is connected to the outer end. of pin 32. against the outer face of frame side 8 by the holdfast means 39. The bracket 38 includes a diagonally disposed outwardly directed arm 40 arranged parallel to the lever arms 34, 35 at and adjacent to the point of mergence of arm 34 with arm 35. Extending through the arm 40 and the point of mergence between the lever arms 34, 35 is an inclined pivot for lever 33. The lower end portion of lever arm 35 is formed with a right angular disposed terminal part 4| which carries, in depending relation, a vertically disposed roller 42.

Secured to the outer face of the frame side 8 by the holdfa st means 43 is an outwardly directed closed outer end, open inner end, slotted cylindrical housing 44. The latter is formed at its inner end with an annular flange 45 through which the holdfast means 43 extends. The housing 44 is formed with diagonally disposed aligning slots 46 and also has: arranged therein a compression spring 41. v The housing 44 is arranged below and outwardly with respect to bracket 38. The lever arm 35 extends through the slots 46. The spring 41 permanently bears upon the top edge of lever arm 35.

Slidably keyed upon the extended end l3 of shaft I2 is the main driving clutch 50 of the machine. The said'clutch includes a sleeve 48 shiftable lengthwise of shaft I2 and having a peripheral annular groove 49 intermediate the ends thereof.

The sleeve 48 is shifted in one direction by a yokeor crescent 5| extended into groove 49 and depending from sleeve 48. The yoke or crescent 5| is secured to, bodily carried with and extends upwardly from a horizontally shiftable baror shaft 52 employed for moving the yoke to shift the sleeve. The bar 52 extends through frame side 8. The parts 48, 49, 59, 5| and 52, referred to, are elements of cutting machines now in use.

The attachment, in accordance with this invention, is associated with the sleeve 48 and for this purpose the roller 42 permanently extends into the groove 49 whereby when sleeve 48 is shifted in a direction away from wheel l4, the lever 33 will be rocked on its pivot in a direction to move the element 25 to the full line position shown in Figures 2, 3 and 4. The brake, not shown, is applied when the structure S arrives at the position shown in Figures 1 and 2. When the sleeve 48 is shifted to the dotted line position shown in Figure 2 the element 25 will be withdrawn from the path of and below block l5 to the position shown in Figures 5 and 6.

When the cutter bar structure 9 arrives at the top of its stroke the element 25 is moved into position under the block l5, the latter being about one-quarter of an inch above element 25. If the brake holds, the cutter bar structure 9 will remain at top. If brake does not hold, the cutter bar structure 9 moves down about one-quarter of an inch when the block I5 will abut element 25 and the latter will restrain any further downward movement of cutter bar structure 9 until element 25 is moved clear of the path of block IS.

The block 39 and spring 3|, in connection with A bracket 38 is secured the pin 32, provide a spring controlled take up means for member 26 for a purpose to be referred to.

When the clutch is disengaged, the lever 33 is in the full line position Figure 2. When the 5 clutch is engaged, the lever 33 is in the dotted line position Figure 2. When the lever 33 is in full line position, Figure 1, the brake, not shown, for the driving mechanism of the machine is supposed to stop the momentum of the said mecha- 1Q nism from shaft |2. When the operator wishes to take another cut on the machine, he pulls the operating handle, not shown. This moves yoke 5| towards fly wheel |4 thereby engaging friction clutch. When the lever 33 is in dotted line position, the stop element 25 is as shown in Figure 5, and the structure 9 comes down. At the end of the stroke, the clutch is automatically disengaged. The brake is forced around the brake drum and holds the structure 9 in its upper position. If the brake does not hold, the block I5 on structure 9 strikes the element whereby the downward movement of structure 9 is arrested thereby preventing repeat.

The purpose of spring 3| will now be referred 25 to and it never comes into action under normal operating conditions. However, if the operator wishes to stop structure 9 one-half or one-quarter of the way down the stroke he pulls the operating handle. 7 ing the lever 33 to the full line position, Figure 2. The action of lever 33 will shift stop element 25 block l5 and the action is taken up by the spring 3|, as shown in Figure 6. The purpose of the compression spring 41 is to counteract the 36 effect of spring 3| when it is in a state of compression. If the spring 41 was not usedand the machine was stopped in the middle of the stroke with spring 3| compressed, there would be a tendency for lever 33 to move towards the dotted line position thereof shown. To counteract this effect on the clutch, the spring 41 is heavier than spring 3| so as to make sure that there is not the slightest tendency for the clutch to engage when the machine is stopped in any but the normal position.

1. A safety or non-repeat attachment for the vertically movable cutter bar structure of cutting machines, the combination of an oppositely shiftaole means located below thecutter bar structure. an abutment block adapted to be secured to the upper portion of and extending rearwardly from said structure, a slidably supported stop element adapted to be positioned at the upper portion of one side of the machine,.capable of being pro jected into the path of said block and coacting with the latter for restraining the lowering of said structure, an upstanding rockable lever pivoted intermediate its ends for projecting and withdrawing said stop element respectively into and out of the path of said block, said lever being attached to said element, a support for the pivot of said lever adapted to be secured to the said side of the machine, and a roller carried by the lower end of said lever permanently extending into the periphery of the said oppositely shiftable means to provide, on the shifting of the latter in opposite directions, the rocking of said lever.

2. The invention, as set forth in claim I, having the lever thereof formed of an upper and a lower arm, the former being of less length than that of and inclining inwardly with respect to the lower arm, the latter being formed with an angularly disposed lower terminalportlon carry- This disengages the clutch forc- 301 ing said roller, and said upper part connected to the stop element.

3. The invention, as set forth in claim 1, having the lever formed of an upper and a lower arm merging into each other, said arms being disposed in angular relation, and having the pivot for said lever arranged at the point of mergence of said arms.

4. A safety or non-repeat attachment for the vertically movable cutter bar structure of cutting machines, the combination of an oppositely shiftable means located below the cutter bar structure, an abutment block adapted to be secured to and project from the upper portion of the cutter bar structure, a slidably supported stop element capable of being projected into the path of said block and coacting with the latter for restraining the lowering of said structure, an upstanding rockable lever pivoted intermediate its ends for projecting and withdrawing said stop element respectively into and out of the path of said block, a roller carried by said lever and adapted to permanently extend into the periphery of the said oppositely shiftable means to provide, on the shifting of the latter in opposite directions, the rocking of said lever, and a confined compression spring bearing against said lever below its pivot.

5. A safety or non-repeat attachment for the vertically movable cutter bar structureof cutting machines, the combination of an oppositely shiftable means located below the cutter bar structure,

'an abutment block adapted to be secured to and project from the upper portion of the cutter bar structure, a slidably supported stop element capable of being projected into the path of said block and coacting with the latter for restraining the lowering of said structure, an upstanding rockable lever pivoted intermediate its ends for projecting and withdrawing said stop element respectively into and out of the path of said block, a roller carried by said lever and adapted to permanently extend into the periphery of the said oppositely shiftable means to provide, on the shifting of the latter in opposite directions, the rocking of said lever, a stationary slotted housing for slidably supporting said stop element, said stop element including a pin extended outwardly through and from the slot of the housing, and said pin being connected to the upper end of said lever.

6. A safety or non-repeat attachment for the vertically movable cutter bar structure of cutting machines, the combination of an oppositely shiftable means located below the cutter bar struc ture, an abutment block adapted to be secured to and project from the upper portion of the cutter bar structure, a slidably supported stop element capable of being projected into the path of said block and coacting with the latter for restraining the lowering of said structure, an upstanding rockable lever pivoted intermediate its ends for projecting and withdrawing said stop element respectively into and out of the path of said block, a roller carried by said lever and adapted to permanently extend into the periphery of the said oppositely shiftable means to pro- 5 vide, on the shifting of the latter in opposite directions, the rocking of said lever, and a spring bearing against the inner end of said stop element, a spring bearing against the outer side edge of said lever, said springs coacting to prevent delay of said stop element in its projecting movement into the path of said abutment block.

7. The invention, as set forth in claim 1, having its lever disposed at a rearward inclination from its lower end, and a part disposed in a diagonal direction with respect to the cutter bar structure for supporting the pivot for said lever.

8. The invention, as set forth in claim 1, having as parts of said stop element a slidable extendible member carrying therein and connected thereto a substantially encompassed a spring controlled take-up means therefor.

9. A safety or non-repeat attachment for the vertically movable cutter bar structure of cutting machines, the combination of an oppositely shiftable means located below the cutter bar structure, an abutment block adapted to be secured to and project from the upper portion of the cutter bar structure, a slidably supported stop element capable of being projected into the path of said block and coacting with the latter for restraining the lowering of said structure, an upstanding rockable lever pivoted intermediate its ends for projecting and withdrawing said stop element respectively into and out of the path of 85 said block, a roller carried by said lever and adapted to permanently extend into the periphery of the said oppositely shiftable means to provide, on the shifting of the latter in opposite directions,

the rocking of said lever, a stationary slotted 40 housing for slidably supporting said stop element, said stop element including a confined spring controlled slidable block, and a pin anchored to the block and extending through and from the slot of the housing, said pin being connected to the upper end of the lever.

10. The invention, as set forth in claim 1, having said stop element consisting of a hollow member closed at each end and slotted in one side, a block slidably mounted in said member, a spring within said member and interposed between one end of the block and the outer end of said member and a pin anchored to the block and extending through and beyond the said slotted side, having the support for the stop element slotted, the slot in said support aligning with the slot in said member, one end of the slot coacting with said pin for arresting the projecting movement of the stop element, and said pin being connected to the upper end of said lever. 50

JULIUS M. MINKOW.

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