US1662638A - Slug-sawing device - Google Patents

Description

a Sheets-Sheei 1 G. L. CURLE LuG SAWING DEVICE Filed Dec. 5, 1925 March 13, 1928.

March 13, 1928.

. G. L. uR

SLUG $AWING DEVICE Filed Dec. 5, 1925 3 Sheets-Sheet 2 Patented Mar. 13, 1928.

UNITED STATES attains PATENT f OFFICE. f

1.. MWNnm GEORGE L. CURLE, 0F 'MINHEAPOLIS, MINNESOTA SLUG-SAWIN G DEVICE.

Application filed December This invention provides an extremely simotype or slug-casting machines are employed.

Generally stated, the invention consists of the novel devices and combinations of de vices hereinafter described in the claims.

In the accompanaying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 is a plan view of the improved sawing device;

Fig. 2 is a view partly in front elevation and partly in section on the line 2-2 of Fig. 1, some parts being broken away;

Fig. 3 is an'enlarged section taken approximately on the line 3-3 of Fig. 1, looking from the right toward the left;

Fig. 4 is an enlarged section taken on the same line as Fig. 3, but looking from the left toward the right but showing certain other parts in full elevation, some portions being broken away; i

Fig. 5 is a perspective showing a. sliding bsd or carriage on which the vise is mounte F ig. 6 is a perspective looking down upon the relatively fixed member of the vise;

Fig. 7 is a perspective showing the vise member illustrated inFig. 6 turned bottom side up;

Fig. 8 is a perspective looking down upon the relatively movable member of the vise;

Fig. 9 is a perspective showing the movable vise member illustrated in Fig. 8 turned upside down;.-

Fig. 10 is a fragmentary view partly in section on the line 10-1O of Fig. 1, but with some parts in full;

Fig. 11 is a detail in section onthe line 11-11 of Fig. 10; and i Fig. 12 is a fragmentary section on the line 1212 of Fig. 4, showing the saw, the

5, 1925. Serial No. 73,381.

head to which it is appliedanda portion of the saw arbor.

All of the parts of the machine are supported from and mounted directly or in directly a plate that forms the top of the box 14 equipped with a drawer '15 adapted to re ceive the chips or metallic sawdust from a small circular saw 16. This saw 16 in the structure illustrated is detachably secured by 05 screws 17 to a head 18 of the saw arbor 19 journaled in bearings 20 of a-bracket21 rigidly secured on the base 13. The numeral 22'indicates a hood-like saw guard supported from the bracket 21 and overlying the saw. The vise to be hereinafter described is carried by av sliding base or carriage 23, which, in turn, has dovestailed engagement with the fixed base 13 and is mounted to slide at one side of thesaw on a line parallel to the 76 plane of the saw. This slide is shown as provided with an upstanding flange 23" that afi'ords a saw guard. The saw will preferably be driven froma small electric motor 24lmountedon the base, the rotor thereof being provided with a driving'pulley 25 over which and apulley 26on the saw arbor 19runs a belt 27, all as best shown in Figs. 1 and 4. I

. The sazwlfi is arranged to cut off the linoa5 type slugs y, as will hereinafter more fully appear, and to smoothly finish the cut ends, the saw head 18 is provided with one or more, as shown three, cutters 28 adjustably held by set screws 29, as best shown in 0 Fig. 12, with their cutting edges projecting through and very slightly beyond the exposed face of the saw.

The important features of this invention are found in the construction of the vise and the relative arrangement or manner of mounting the same in respect to the saw. As preferably designed, this vise comprises two main plate-likebocly members, to wit: a

relatively stationary member 30 and a relatively movable sliding member. 31, both of which, as shown, are substantially rectangular in outline. The member .30 is formed in its under side with longitudinal grooves 32 that are closed at their bottoms by a thin plate 33 rigidly secured to the bottom of said member 30. The sliding member 31, at its rear edge, is formed with a depending flange 34to which are rigidly secured parallel guide bars 35 that are so spaced on a bed 13 shown as in the form of 60 below the bottom of the member 31 that the member 31 will slide on top of the member when the guide bars 35 are inserted in the grooves 32. A transverse rack bar 36 is rigidly secured to the front edge of the member 30 and rises therefrom. The immeral 37 indicates a bar rigidly secured to the right-hand edge of the member 30. This bar 37 extends parallel to the plane of the saw and preferably extends flush with the righthand end of the rack bar 36. The rack bar 36, in addition to another function present ly to be noted. atl'ords a jaw or clamping surface against which the liuotype slug 1 is adapted to be tightly clamped by the jaw or front edge 31 of the sliding vise member 31. Here it should be noted that the righthand ends of these two clamping devices or surfaces extend so close to the plane of the saw that they are adapted to clamp and hold very short slugs or, in other words, will hold slugs by gripping only a very small portion thereof and thereby cause the saw to cut oil the slug very close to its left-hand end; and, of course,the said clamping surfaces will hold very long linotype slugs and similar strips, such as leads and borders.

Normally, the relatively fixed vise member 30 will be set with the slug-clamping surfaces of the jaw or bar 36 and of the member 31 at a right angle to the plane of the saw. If the slugs were to be sawed off only at right angles, then the vise member 30 could be positively and immovably fixed to the sliding bed 23, but as it is freqeuntly desirable to cut the slugs at a bevel or angle, the said vise member 30 is mounted for angular adjustments. To provide for this angular adjustment, the vise member 30 is shown as provided at its forward righthand cornor with a depending trunnion 38 that. fits a seat in the sliding bed 23. The axis of this pivot 38 is approximately in the plane of the clamping surface of the bar 36 and as close as practicable to the plane of the saw. In Fig. 1, this pivot is covered by the linotype slugs y and, hence, is indicated only by a dot marked with the identifying numeral 38. To lock the vise in its normal position shown in Fig. 1 and in several angular positions, such as at. angles of twenty-two and a. half degrees and forty-five degrees to the plane of the saw, the sliding bed '23 is shown as provided with pin seats 39 and the vise member 30 is provided with a vertically movable lock pin lt) applied to an offset lug 30 of the vise member 30. To receive the pin -10, the member 30 and its plate 33 are provided with a vertical pin seat or perforation 40, (see particularly Figs. 6 and 7).

For accurately setting the slug to be cut a desired length. I provide an adjustable gauge, which, as shown, is in the form of a block it that is grooved in its under side so that it straddles and slides upon the rack bar 36. A short shaft 42 is journaled in and extends longitudinally of this gauge block and is provided with a worm 43 located between longitudinally spaced bearing lugs of said block. (see particularly Figs. 1 and 10). The hub of this WOIIH is preferably graduated to indicate micrometer adjustments produced by rotation of the worm. In one end, the hub of said worm is shown as provided with indentations 43 that are engaged by a spring-pressed ball ell set into the adjacent bearing lug of said block. \Vhen the block is in working position on the rack bar, the threads of the worm 43 engage the teeth of said rack bar so that the said gauge may b given very fine and accurate adjustments by rotation of the worm. Of course, for quick adjustments, the entire block may be raised and moved longitudinally from one position to another. Said block is shown as provided with a projecting flange ll by means of which it may be. quite readily picked up and reapplied. In the construction shown, the inner portion of the right-hand edge of the flange 41 is arranged to engage the left-hand end of the slug 1 and cooperates with a graduated scale 45 secured to the top of the front portion of the relatively movable vise member 31. The numeral 46 indicates a finger grip in the form of a flanged or grooved plate rigidly secured to the front edge of the relatively fixed vise member 30.

'hen the slug placed between the clamping surfaces of the vise members 30 and 3], as shown in Fig. 1, and the vise member 31 is forced forward against the same, the slug will be firmly held in position for sawing and. of course. by setting the gauge. it may be accurately cut to any desired length. even to a very short length. For effecting quick :nljustments of the vise and tirm clamping of the slug. there i provided a vise-actuating device of novel construction. the preferred form of which is illustrated in the drawings, and which, the scribed in detail. is as follows:

The numeral 47 indicates a clamping lever shown as formed with a head 48 that is pivoted to the movable vise member Ill at 49 and is provided with a short projecting arm or lug 50. The head 48. as shown. works in a rece s 51 formed in the top of the vise member 30. The numeral 51 indicates a stop pin applied to the member tltl and limiting the movement of the lever 47 in one direction.

On the upper face of the. bar 37 of the fixed vise member 30 is a ratchet bar .72 that is adapted to be. engaged by the ratchet teeth of an anchoring dog which. as shown. is pivoted to the end of a short thrust bar 54, the front end of which is connected to the arm of the lever head 48, as best shown in Figs. 1 and 3. The thrust bar 54 has a beveled surface that engages the beveled end of a cam-acting abutment 55 in the form of a finger projected from a block 56 secured on the movable member 31. The forwardly projecting end of the dog 53 engages the under surface of the abutment 55. The numeral 57 indicates a small coiled spring that acts against the forward end of the dog 53 and against a fixed abutment 58 on the movable vise member 31. It will be noted that the spring 57 presses the dog 53 forward or toward the right in respect in Fig. 3 and slightly downward, but that, normally, the engagement of the beveled surface of the bar 54with the abutment 55 will hold said dog raised above and clear of the ratchet bar 52.] r

Operation.

In the use of the device to saw or cut off slugs, the slug will be placed between the clamping surfaces of the vise, as already described. Then the movable vise member 31 will be moved bodily forward until the slug stops the movement thereof, and then pressure will be applied to tightly clamp the slug by moving forward the free end of the lever 47. Of course, before the slug is clamped, it will be set for cutting to the proper length by adjustments of the gauge device described. The lever 47 may be most conveniently pressed forward by applying the thumb of the left hand thereto and the fingers of that hand over the flange 46. The initial forward movement of the lever 47 causes the arm 50, operating through the push bar 54;, to force the anchoring dog 53 rearward or toward the left in respect to Fig. 3, and as said bar is released from the cam abutment 55, the teeth of the dog 53 will, by the action of the spring 57 and the downward thrust of said rod 54, be caused to engage the underlying teeth of the fixed ratchet bar 52. As soon as the dog 53 is engaged with the ratchet bar 52, it becomes a fixed base of reaction against which the lever 47 reacts and, consequently, said lever, acting through its pivot 49, tightly presses the movable vise member 31 forward or against the slug 1 Thus, the linotype slug will be firmly held as long as the hand pressure is applied to the lever, but will be released as soon as the hand pressure is re moved from said lever. When the lever 17 is released, the spring 57 will restore said lever to its normal position against the stop 51, the bar 54 will be raised by the cam abutment 55 and the dog 53 will be released from the ratchet bar 52, so that the movable vise member 31 may then be again freely moved. This arrangement gives a very quiclcacting self-releasing device in which the slug will be clamped as long and only as \Vhcn the slug is to be cut oil at an angle a of forty-live degrees, for example, the vise will be adjusted so that its pin dwillbe inthc most rearward pin sea! 39, and under such adjustn'ients, the entire vise, with its operating connections, will be correspondingly adjusted so that the clamping operation will be the same as before described.

. In the action of this self-releasing vise, the slugs will be dropped or released instantly upon release of the hand pressure from the operatingdevice. Moreover, it is important to note that the pressure required to close the jaws of the vise upon the slug is in a plane parallel to the plane in which the sliding base 23 is mounted to move. This latter feature makes it an easy matter both to close the jaws of the vise and to move the vise bodily to present the slug to the saw. I

It is further important to note that the flange 41 projects from the block in a direction over the movable vise member 31 and away from the relatively fixed vise member 30. \Vith this arrangement, the flange 11* does not interfere with the angular movements or adjustments of the vise, as would be the case if the flange 41 were projected in a reverse direction. The efliciency of this device has been thoroughly demonstrated in actual practice.

hat I claim is: i

1. In a sawing device, the combination with a base support, of a vise and a saw mounted on said base support, means for moving one of said mounted elements toward and from the other to produce a sawing action, said vise having clamping jaws, one of the vise members being mounted for straight-line sliding movement toward and from the other, and a self-releasing jawclosing device including a hand piece movable in the plane of the vise-closing action and operative to close the vise only while subject to hand pressure, said lever having a shiftable base of reaction.

2. In asawing device, the combination with a base support, of a vise and a saw mounted on said base support, said vise being slidably mounted for movement toward and from said saw, and having clamping jaws, one of which is slidably mounted for movement toward and from the other in the plane of sliding movement of the vise, and a jaw-closing device movable in the plane of movement of said vise and movable jaw,

and operative to close the vise only while subject to hand pressure, and yielding means for automati ally releasing said jaw-closing device and permitting the vise to open when said lever is relieved from hand pressure, said lever having a shiitable base of reaction and automatic means for setting said base of reaction by initial movement of said lever.

3. In a sawin e device. the combination with a base support. of a self-releasing vise and a saw mounted on said base support, means for moving one of said mounted elements toward and from the other to deliver the work to the saw. and a jaw-closing device for said vise includin; an operating lever, a relatively fixed anchor bar, an anchoring dog normally released from said.

bar, and a connection whereby said dog will be engaged with said anchor bar by initial movements of said lever from normal releas ing position, said vise including jaws, one of which is mounted for horizontal sliding movement to and and from the other, the lever of said operating: device being mounted for movement. in a horizontal plane and in a direction toward and from the vise jaws, and yielding means yieldingl holding said lever in its retracted jaw-releasing position.

l. In a. sawine device, the combination with a base support, of a rise and a saw mounted on said base. one of said mounted members being movable toward and from the other to produce the sawing action, said vise being mounted for angular movement in respect to the saw and comprising: relalively fixed and movable jaw members, the former being, nearest adjacent the saw, a gauge block slidable alone said jaws and having a lateral flange projecting over said movable jaw and away from said relatively lixed jaw and the saw, and means for closing and releasing the vise jaws.

In testin'iony whereof I aliix my signature.

GEORGE L. CURI 1E.

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