US1257550A - Feed mechanism for metal-working machines. - Google Patents

Description

H. P. TOWNSEND.

FEED MECHANISM FOR METAL WORKING MACHINES. APPLICATION FILED JUNE 21.1914.

Patented Feb. 26, 1918.

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H. P. TOWNSEND.

FEED MECHANISM FOR METAL WORKING MACHINES.

APPLICATION FILED JUNE 27, l9l4.

Patenmdl m. 26,1918.

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I'VITNESSES:

pairs snares rarnnr HARRY P. TOTHNSEND, 0F HARTFGRD, CONNECTICUT. ASSIGNOR TO THE H. P. TOWNSEND MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT, A CORPORATION OF CONNECTICUT.

FEED MECHANISM FOR METAL-WORKING MACHINES.

Specification of Letters Patent. t t pm, 5, 1915 Application filed. June 27, 1914. Serial No. 847,7?1.

To all whom it may concern:

Be it known that I, HARRY P. TOWNSEND, a citizen of the United States, residing at Hartford, in the'county of Hartford and State of Connecticut, have invented a new and Improved Feed Mechanism for Metali/Vorking Machines, of which the following is a specification.

My invention relates to that class of machines employed for forming metallic articles by cutting, turning and like operations, and especially screws, and an object of my invention, among others, is to provide a feed device for machines of this class that shall be extremely simple in construction and eflicient in operation.

One form of device embodying my invention and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which Figure 1 is a view in lengthwise vertical section through the base of a machine having my improved feed device mounted thereon.

Fig. 2 is a view in cross section througl the same. i

Fig. 3 is a detail view, scale enlarged, illustrating the construction and manner of operation of the feed fingers.

In the accompanying drawings the numeral 6 indicates the base or table of my improved machine supported on legs 7. The feed mechanism illustrated and described herein forms a part of a machine embodying other inventions, set forth and described in my copending application filed concurrently herewith, and there is illustrated and described in the drawinp 'in this case, the feed mechanism with only such other parts relating to the rest of the machine as will enable a clear understanding of the arrangement to be obtained. The location of the chuck spindle is illustrated by dotted outline in Fig. 2.

The numeral 13 indicates a gear secured to a cam shaft 14 mounted in bearings on the frame of the machine, and the numerals 20, 24, 28, 33 and 50 indicate chucking, belt shifter, brake, rock shaft and back rest cams, respectively, for operating mechanisms other than illustrated hereinand further descrip tion concerning the same is therefore omitted.

The numeral 38 indicates a bracket adjustably mounted upon the table 6, ears 37 projecting from the side of the bracket for the support of a saw lever appurtenant to other parts of the machine. A hopper 51 is supported on a standard 52 rising from the table and having a feed blade 53 pivotally mounted in the hopper and actuated in any suitable manner, as by a crank 54 upon which the lower edge of the feed blade rests, said crank being secured to a shaft 55 mounted underneath the hopper and bearing a pulley 56 driven as by means of a belt 57 from a pulley 90 on the cam shaft 14. A straight runway 58 extends obliquely downward from the hopper and transversely to the axis of the spindle C and is arranged to receive blanks taken up by the blade 53 in a common and well known manner, and these parts being of well known construction further and detailed description is omitted herein.

A carrier 59 is secured to a carrier shaft 60 mounted in bearings projecting from the under side of the runway 58,.the axis of this shaftbeing obliquely arranged. This carrier is preferably shaped as quadrant with a pocket 61 at the peripheral portion of one edge, this pocket extending radially of the carrier in position to receive blanks 62 from the runway when the carrier is in its normal position, and as shown in Figs. 1 and 2 of the drawings. The walls of the pocket have openings 63 within which feed fingers, to be hereinafter described, may pass to grasp a blank. An arm 6% is secured to one end of the shaft 60 and a slotted rod 65 connects said arm with carrier shaft op erating lever 67 pivotally mounted on the side of the bracket 38. The connection herein shown consists of a pin 66 secured to the lever 67 and projecting through the slot and a bearing block 7 5 is supported at the upper end of the lever as by means of a projection 74 from the block extending into a hole in the lever and secured as by means of a set screw.

A feed fin er shaft 76 is rotatably mounted in the block 5, feed fingers 77 being secured to one end of the shaft and a grooved disk 78 being secured to the shaft preferably on the opposite side of the block from the feed fingers. 'A cord 79 is wrapped about the disk 7 S, and extends over a sheave 39 mounted in a projection on the under side of the bearing block, said cord being secured to a post 40 on the bracket 38. A spiral spring e1, having one end secured to the shaft 76 and the other to a 0st 42, rotates the shaft in onedirection, anc pull of the cord 79 will rotate itin the opposite direction, this pull upon the cord being obtained in the rocking movement of the feed finger lever 70 to move the feed fingers downwardly into line with the axis of the chuck spindle. It will be noted that the end ofthe cord is so arranged that a bend occurs in its length, so that the feed fingers may have a slight movement dotted lines in Fig. 1 of the drawings.

, downwardly without drawing upon the cord and for a purpose to be hereinafter explained. A pushing finger 80 is secured to a pro jection from the block 7 5, the working end of this pushing finger being located opposite and in line with the recess between the feed fingers, and in position to aid in placing a blank in the chuck, but to prevent full pickup movement of the finger if the blank is too long.

A feed arm 81 is secured to the feed finger shaft 71 and projects in position to engage and to be operated by the feed face 82 of the cam 24c on the camshaft 14, as shown in A spring 93 hold the feed arm yieldingly 1 against the face of said cam.

In the operation of the device the carrier being in its normal position a blank is located in the pocket 61, and at the proper time a cam 69 on the periphery of the cam 48 engages the lower end of the carrier shaft operating lever 67, moving the upper end toward the carrier and rocking the carrier shaft sothat' the edge of the carrier bearing the pocket is moved downwardly to a position in the path of movement of the feed fingers 77. When the pocket 61 is in this position the cam 7 3 releases the lever 70 for an instant, the spring 1% drawing 7 the lever slightly downward and the spring fingers-grasping the blank within the pocket in the carrier. The cam promptly actuates the lever, moving the feed fingers back from the carrier and the latter is returned to its normal position. A substantial depression in the cam 7 3, passing the end of the lever at the. proper time, causes the feed fingers to be moved downward in position in line with the axis of the chuck C shown in dotted lines in Fig. 2. It will be noted that when the feed finger take the articles from the pockets in the carriers, the head of each article is presented toward the chuck. In the slight movement of the fingers to remove the articles from the carriers, the cord 79 is slackened and has no effect upon the feed fingers. Upon the next forward and considerable movement of the feed fingers the cord 79 being tightened, the disk 78 is rotated suiiiciently to cause the feed fingers to make a one-half turn, so that the article held thereby has its position changed end for end in position to be moved into the chuck. The cam face 82 now permits the feed finger shaft 71 to move lengthwise under the influence of the spring 93, carrying with it the feed fingers and pushing finger 80, forcing the article into the chuck that thereafter is, by proper mechanism, caused to grasp the article, and the cams 82 and 73 return the feed fingers to the position shown in Fig. 2 in readiness for another operation.

While I have shown and described herein a satisfactory form of mechanism for accoinplishing my purpose, this may be departed from to a greater or lesser degree and yet be within the spirit and intent of the invention within the scope of the claims.

I claim- 1. A blank feeding mechanism including a runway having a straight inclined edge extending to its lower end forming a track for blanks, a carrier pivotally mounted to receive blanks delivered by natural forces thereto from said runway in a substantially upright position, said carrier conveying said blanks to a substantially horizontal position, and-means for lifting said blanks from said carrier and for bodily conveying and delivering them into a blank holding device.

2-. A blank feeding mechanism including a runway for blanks, a carrier movably mounted to receive blanks delivered by natural forces thereto in a substantially upright position from said runway and to carry them to a substantially horizontal position, and means for lifting said blanks from said carrier and for bodily conveying and delivering them into a blank holding device.

3. A blank feeding mechanism including a runway having a straight inclined edge ,forming a track for blanks, a carrier pivforming a track for blanks, a carrier mounted on a pivot having its axis parallel with the plane of inclination of said track to receive blanks in a substantially upright position and to convey them to a substantially horizontal position, and means for removing articles from the carrier for delivery to a holding device. 7

5, A blank feeding mechanism including a runway having a straight inclined edge forming a track for blanks, a carrier mounted to swing in a plane at right angles to the plane of inclination of said track and having a pocket to receive a blank from the track in a substantially upright position and to convey the blank to a substantially horizontal position, and means for removing articles from said pocket for delivery to a blank holding device.

6. A blank feeding mechanism including a runway for blanks, a carrier pivotally mounted to receive blanks delivered by natural forces thereto from said runway in a substantially upright position, means for moving the carrier through an arc of substantially ninety degrees to move said blank to a substantially horizontal position, and means for lifting said blanks from the carrier and for bodily conveying and delivering them to a blank holding device.

7. A blank feeding mechanism. including a carrier with means for supplying blanks thereto, means for operating the carrier, feed fingers rotatably mounted and otherwise movably mounted to remove articles from the carrier for delivery to a holding device, means for so moving said fingers, a disk secured to rotate with the feed fin.- gers, and means for engaging the disk to cause said rotation.

8. A blank feeding mechanism including a carrier with means for supplying blanks thereto, means for operating the carrier, feed fingers movably supported to take blanks from the carrier, a rotatable support for saidfingcrs, means for imparting feeding movement to said fingers, and a flexible member wrapped about the rotatable support to effect rotation thereof.

9. A blank feeding mechanism including a carrier with means for supplying blanks thereto, means for operating the carrier, feed fingers movably mounted to remove articles from the carrier and feed them to a blank holding device, a rotatable support for said feed fingers, means for imparting feeding movement to'the feed fingers, and

flexible member wrapped about said support and secured to another member to effect rotation of said rotatable support by reason of said feeding movement.

10. A blank feeding mechanism including a carrier with means for supplying blanks thereto, means for operating the carrier, feed fingers movably mounted to remove articles from the carrier and feed them to a blank holding device, a rotatable support for 11. A blank feedin mechanism includin I a carrier with means for supplying blanks thereto, means for operating the carrier, a movably mounted feed member, a block carried by said member, feed fingers rotatably mounted in said block, a grooved disk secured to rotate said feed fingers, and a flexible member wrapped about said disk to effect rotation of the feed fingers by reason of the feeding movement thereof.

1:2. A blank feeding mechanism including a carrier with means for supplying blanks thereto, means for operating the carrier, a movably mounted feed finger support, feed fingers rotatably mounted in said support, means connected with the feed fingers to cause their rotation by reason of their feeding movement, and means for permitting partial movement of said fingers, in the direction of feeding movement thereof, without causing rotation of said fingers.

13. A blank feeding mechanism including acarrier with means for supplying blanks thereto, means for operating the carrier, a feed lever, means for operating it, a rotatable support at the upper end of the lever, feed fingers secured to said support, a flexible member wrapped about said support, and means for securing said flexible member to permit partial movement of the feed lever without rotating the support.

14. A blank holding device to receive a blank in combination with a blank feeding mechanism including an inclined runway arranged transversely to the axis of said device, a carrier mounted on a pivot to swing in a plane transversely to said runway, and means for removing articles from said carrier for delivery to said blank holding device.

15. A blank feeding mechanism including a carrier with means for supplying blanks thereto, means for operating the carrier, a lever with means for operating it, a block carried by said lever, feed fingers rotatably mounted on their longitudinal axis in said block, means for rotating the feed fingers, and a pusher carried by said lever, said feed fingers and pusher having their positions fixed with respect to each other.

16. A blank feeding mechanism including feed fingers movably supported to remove blanks from one position and deliver them to a holding device, a rotatable support for said fingers, means for imparting feeding movement to said support, and a flexible member engaged with the rotatable support and arranged to remain loose during a part of the movement of saidsupport and to be drawn tight during the feeding move- 7 ment of the feed fingers,

'rotatably mounted feed fingers, means for imparting feeding movement to said fingers to deliver articles to a holding device, a disk secured to rotate With the feed fingers, and means for engaging the disk to cause said rotation.

19 A blank feeding mechanism including feed fingers movably supported to deliver blanks to a holding device, a rotatable support for said fingers, means for imparting feeding movement to said support, and a flexible member Wrapped about the rotatable support to effect its rotation.

HARRY P. TOWVNSEND.

Witnesses ARTHUR B. JENKINS, A. E. OBRIEN.

(joplesof this patent may be obtained for five cents each, by addressing the Commissioner of latents,

. \Vashington; I). G.

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