US238577A - Feedinand dubbul - Google Patents

Description

(Model.)

P. DUBRUL.

Machinery Clutch.

No. 238,577. Patented March 8,1881.

Fig. 2,

-AUbi-WED STATES PATENT OFFICE.

vFERDINAND DUBRUL, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO 'NAPOLEON DU BRUL, OF SAME PLACE.

MACHINERY-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 238,577, dated March 8, 1881.

Application filed January 14, 1881. (Model.)

'Tofall whom fit may concern Be it known that I,^FERDINAND`DUBRUL, of Cincinnati, Hamilton county, Ohio, have invented a new and useful Machinery-Clutch,

` of which the following is a specilication.

In the accompanying drawings, Figures 1 and2 are vertical sections on the lines a' a: and y y, respectively. Figs. 3 and 4 are, respectively, a side view and an end View ofthe 1o self-clutching sleeve. Fig. 5 shows, by vertical section, the preferred form of my self-clu tching sleeve. Fig. 6 shows the form of trigger employed in connection therewith.

For the purpose of illustration I have shown and here describe my clutch as an integral member of a die-press; but it is capable of useful application to a great variety of machines in which optional connection with and disconnection from the driving-power may be de- -2o sired.

A may represent a suitable die-press frame;

B, the customary supporting-table on which the work is laid; C, guide-bearing for plunger or head D of any die, stamp, or punch, E; F

F', bearings for shaft G; H, au eccentric or crank on said shaft; I, yoke which embraces said eccentric, and which, being prolonged downward, is pivoted, J, to the top of the plunger D.

The shaft G projects beyond bearing F', and is perforated, g, for insertion, when desired, of a hand spike or lever, whereby said shaft can be rotated by the operator independently of the drivin g-power for setting of the dies or 3 5 other purposes; or, instead of or in addition to the perforations g, said shaft may be squared at its extremity for application of a wrench. The other extremity of shaft G carries a driving-pulley, K, that revolves loosely upon the 4o said shaft.

L is a sleeve, which is coupled to the shaft by a key or feather, M, which may be secured to the sleeve and slide in a groove, g', in the shaft G, as in Fig. 5, or may be secured to the shaft and slide in a groove in the sleeve, as in Figs. 2, 3, and 4. 1n either arrangement rotation or non-rotation of the sleeve is accompanied by a similar condition ot' the shaft G. The sleeve L is capable of sliding longitudinally 5o along the shaft G, and when left at liberty is pressed by helical spring N in close contact with the hub O of the pulley K, and in this condition is compelled to participate in the rotation of said pulley, either in consequence of featherlVI occupying a cavity, o, in said hub, as in Fig. 5, or in consequence otl projections lon the sleeve occupying corresponding depressions o in the face of the hub, as in Fig.

2, and in consequence of the sleeve L being feathered to the shaft G in ihe manner stated 6o such rotation is communicated, through said shaft and its eccentric, to the plungerD; but notwithstanding these provisions the normal condition of the said shaft and of its described appendages is one of rest, and one in which the partsv tend to resume a state of inaction at every ascent ot' the plunger.

The means by which the operative parts are brought into prompt action and return automatically to a condition of inactivity I will 7o now specifically describe.

The sleeve L has on that side of it nearest the pulley K a spiral recess, S, which at one end of it merges into the liat disk or face S of the sleeve side nearest the drive-pulley. l

R is a rod or bar, which I call the triggen This rod, when uncontrolled by the operator, is, by a sprin g, P, elevated to the position shown in Fig. l, and in such position its Lipper eX- treinity, r, is forced in front of the liat portion 8o S of the sleeve-face, and operates to hold said sleeve away from the pulley, so as to prevent the latter communicating any motion to the shaft Gr.

To enable the operator to at any moment de- 85 press the trigger R, and thus surrender the sleeve L to the action of the spring N, I couple to the lower end of the trigger a treadle, Q, located conveniently to the operators foot. Depression of said treadle by clutching the shaft 9o G to the drive-pulley K brings the plunger D into active motion, which continues so long as the treadle remains depressed 5 but should the operator desire a cessation of the plunger action, he has only to release the treadle, so as 9 5 to leave the spring P at liberty to re-elevate the trigger, which, engaging in the spiral recess of the sleeve L, operates to push back the sleeve to its unclutclied position at the point in the shafts revolution at which the eccenloo tric and its attached plunger have reached their highest position, and, the shaft then coming to rest, the punch is automatically withdrawn and held aloof from the table or die. Before, however, the powerful and comparatively-rapid action ofthe drive-pulley is brought i rectify any misplacement.

into requisition it is generally necessary to as certain whether the punch is accurately centered or adjusted relatively to the die, and to enable the operator to satisfy himself thereof and to rectify any misplacement of the die while the machine is in motion means are provided for the manual lowering ofthe plunger. These means consist of the perforations g, or equivalent device, whereby, while the sleeve is held in the unclutched position by the trigger R, the operator, by use of a lever inserted in the perforations, is enabled to deliberately revolve the shaft G, so as to bring the punch into such close vicinity to the die that he can judge whether the latter is properly placed, and can W'hen left at lib erty the trigger R operates to automatically unclutch the sleeve and to self-lock the same in its unclutched position, in consequence of the triggers penetration beyond the spiral recess S, which recess, penetrating only a part of the radial projection of the sleeve L beyond the shaft G, permits the trigger R to slide in deeper than said recess, and to hold the sleeve in the unclutched or inactive position. This position, if the plunger motion has been derived from the driving-pulley, will always be that of extreme retraction of the plunger; but if the plunger has been subsequently shifted by hand, in the manner above explained, the position will be that at which the plunger has been left by the hand of the operator, and if left below its extreme height it will clutch and 40 raise the punch to its extreme height, ready to receive the work. Hence the operator has the machine under complete control, and does not need to stop the d rive-wheel preparatory to setting .the dies.

For some purposes, instead of positive projections and corresponding recesses on the cluteh-faces of the sleeve and drive-wheel, engagement may depend on friction of one against the other.

Instead of but one spiral recess, two or more may be used for more rapid action, and such a clutch may be applied to the shaft having the .smallest gear in a back-gear press, thereby avoiding strani in proportion to the difference By reversing the action of the trigger-sprin g I the device can be made to go automatically into action instead of to automatically go out of action on release of the trigger.

I am aware that it is old to slide a clutchsleeve on its shaft by means of a lever whose forward end engages the cams on the said clutch-sleeve. Such a device,therefbre, I do not claim, broadly.

Having thus described my invention, the following is what I claim as new and desire to secure by Letters Patent:

l. rIhe combination of the clutch-sleeve L, formed with inclined recess S and annular flat face S', and the trigger It, having portion i' adapted to work in said recess and pass in front of the face, to hold the said sleeve in retracted position until released, as set forth.

2. rllhe combination ofthe shaft Gr, the sliding sleeve L, provided with key-feather M, locking it to the shaft, so as to turn therewith, and the pulley K, the said key-feather sliding with the sleeve, to form a clutch-pin to engage the sleeve and shaft with the pulley, as and for the purpose set forth.

3. The combination of clutch-sleeve L, having gradually-deepenin g inclined recess S and flat face S', the loose drive-pulley K, and selflocking trigger It, under control ofthe operator.

4. The device g, for adjusting the shaft and plunger, in combination with the clutch-sleeve L, formed with inclined recess S and flat face S', and adapted to be held in disconnection, as set forth.`

5. The treadle Q, in combination with the trigger It, having portion r, spring P, and clutch-sleeve L, having dat face S, the said trigger adapted to hold the said sleeve in retracted position until released by the said treadle, as set forth.

In testimony of which invention I hereunto set my hand.

FERDINAND DUBRUL.

Attest:

Guo. H. KNIGHT, SAML. S. CARPENTER.

IOO

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