US1260305A - Feed mechanism. - Google Patents

Description

F. H. BLAKESLEE..

FEED MECHANISM.

APPLICATION FILED MAY 14. 1915.

1,26%305. Patented Mar. 26, 1918.

L'Ujdnzsses Jazz/anion marten srn'rns PATENT ent ies.

FRANK H. BLAKESLEE, OF CLEVELAND, OHIO, ASSIGNOB TO THE AJAX MANUFAC- TURING'COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

FEED MECHANISM.

Specification of Letters Patent.

Patented Mar. 26, 1918.

Application filed May 14, 1915. Serial No. 28,077.

To all whom it may concmm:

Be it known that I, FRANK H. BLAKESLEE, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have'invented a new and useful Improvement in Feed Mechanism, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other'inventions.

The present invention relates to a feed mechanism to be used in various connections and to be of particular valuewhere it is 'desired to secure an intermittent feed for any given part of the mechanism without adding to the complication of the machinery by providing a reduced driving ratio for the feeding mechanism. While it is of no particular importance as to what machine I have adapted the present feeding mechanism, it may be stated, for illustration only, that it has been used for feeding bars of stock to forging machines. To the accomplishment of these and related ends saidinvention then consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings:

Figure 1 is a plan View showing attachment of the present feeding mechanism to a forging machine designed for the manufacture of bolts, spikes and the like; and Fig. 2 is an end elevation of the feeding mechanism.

The general features of -the forging machine 1 will not of course be described, as they are of no importance inthis connection and I will only say that a link or lever 2 is attached to or operated by a main driving shaft 4 of the forging machine. This lever 2 is connected to one end of an arm 5 which is pivotally mounted, being rotatable on a shaft 6 which bears one of a pair of complementary rolls 7 for engaging the bar of stock 8 and introducing the same into the forging machine, the other of such pair of rolls being attached to a second parallel shaft which is inter-geared with the first named shaft to provide for simultane- 011s operation.

Attached to the shaft 6 is a toothed wheel 9 which is adapted to be normally engaged by one of two similar pawls 10 which are pivotally mounted upon a common axis in the form of a pin 11 and are provided with extensions 12- which are adapted to be contacted by the several faces of a cam 15 which is attached to a disk 16, the cam and disk being mounted upon a suitable stub shaft 17 which is pivotally mounted in a fixed bearing '18 and a movable bearing 19 slidable upon two parallel rods 20, the movable bearing being normally pressed against the fixed bearing with a considerable pressure by means of a spring 21 interposed between the movable bearing and a collar 22 which is attached to the two parallel rods. The cam 15 is provided for the purpose .of controlling the engagement of the pawls 10 with the toothed wheel and has, as shown, two spaced and parallel faces 13 which, when either engages the extensions of the pawls, are adapted to restrain the same from engagement with the toothed wheel. Between such spaced and parallel faces on the cam are other faces 1 1 which are adapted to permit the engagement of the pawls with the toothed wheel. The arm 5 is oscillated by means of the lever 2 operated by the cam on the driving shaft and upon a forward movement of the arm one of the two pawls rotates the toothed wheel through a portion of the revolution, if at that time the cam is in such a certain position that it permits the pawls to engage the wheel. 7

The disk '16 which is attached to the cam controls the movement of the same and is provided with four equally spaced one-way notches 25 on its periphery, there being a fixed pawl 26, which is mounted, not upon pawl prevents the disk from returning and the latter is moved through a quarter ofa revolution by the time the arm is returned,

to its initial position. This movement of the disk rotates the cam through a quarter of a revolution, so that upon the next succeeding forward movement of the arm the pawls are held out of position with the toothed wheel and there is no feed. In this way an intermittent feeding of the toothed wheel forward is secured and without the necessity for introducing any reducing gearing between the main driving. shaft and the shaft which is to be rotated at such slower speed.

Either one or two pawls may of course be used and I use two for the reason that in this case there is always one pawl engaging thetoothed wheel preventing the same from slightly turning in either direction except when rotated by the feeding mechanism. The simplicity of the construction of the latter mechanism and the positiveness of its operation will be evident from the foregoing description. 7

Other modes of applying the principle of my inventionmay be employed instead of the one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In feed mechanism, the combination with a wheel to berotated, of an oscillatory arm, a pawl pivotally mounted on said arm and normally engaging said wheel, a cam pivotally mounted on said arm and adapted, in one position, to retain said pawl from engagement with said wheel, and means adapted to intermittently rotate said cam.

2. In feed mechanism, the combination with a wheel to be rotated, of an oscillatory arm,'a pawl pivotally mounted on said arm and normally engaging said wheel, a cam pivotally mounted on said arm and adapted, in one position, to retain said pawl from engagement with said wheel, a disk attached to said'cam, said disk being provided with four equally spaced notches, and a fixed pawl when either engages said pawl, to permit the latter to engage said wheel,'andmeans adapted to intermittently rotate said cam.

a. In feed mechanism, the combination withawheel to be rotated, ofan oscillatory arm,apawl pivotally mounted on said arm and normally engaging said wheel, a cam.

pivotally mounted on said arm, said cam having two oppositely disposed faces adapted when either engages said pawl, to retain.

the latter from engagement with said wheel,

and two other intermediate faces, adapted when eitherzengages said pawl, to; permit the latter to engage said wheel, acircular disk attached to said cam, said disk being provided with four equally spaced notches onits periphery, and a fixedpawl adapted to normally rest upon said diskand to enin suchnotches, thereby causing a quarter turn of said disk upon each return oscillation of said arm;

5. In feed mechanism, the combination with a wheel to be rotated, of an oscillatory arm, a pawl pivotally mounted "on said arm and normally engaging said wheel, a cam V pivotally mounted on said arm, said cam having two oppositely disposed faces adapted when either engages said pawl, to retain the latter from engagement with said "wheel, and two other intermediate faces, adapted, when either engages said pawl, to-permit the latter to engage said wheel, a circular disk attached to said cam, said disk being provided with four equally spaced notches on its periphery, and .a fixed pawl adapted to normally restupon said disk and to engage in such notches, thereby causing a quarter turn of said disk, upon each return oscillation of said arm, and pressure bearmgs for said .disk and cam adapted to tend to maintain the same from oscillation.

, 6. In feed mechanism, thecombination with a wheel to be rotated, of an oscillatory arm, two pawls pivotally mounted on said arm about the same axis, one of said pawls always engaging said wheel, a cam pivotally mounted on said arm, said cam having two oppositely disposed. faces, adapted, when e1ther, engages said pawls, to retanrthejlat terffrom" operative engagement with said Wheel, and tWo other intermediate faces adapted, When either engages said pawl, to permit the latter to engage said Wheel, a circular disk attached to said cam, said disk being provided With four equally spaced notches on its periphery and a fixed pawl adapted to normally rest upon such disk and engage in said notches, thereby causing a quarter turn of said disk upon each return oscillation of said arm, and pressure bearings for said disk and said cam adapted to tend to maintain the same from oscillation.

Signed by me, this 13th day of May, 1915.

FRANK H. BLAKESLEE. Attested by THOMAS H. FAY, HORACE B. FAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C."

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