US292140A - schefflee - Google Patents

Description

f (No Model.) 2 Sheets-Sheet 2.

T. SCH EFPLBR I v FRICTION GLUTCH. v

. N6. 292,140. Pa'tentedJan. 15,1884. W5 F ewa WITNESSESzi 2 VENTOR @XXWM ipa ygw hoisting machines of this character.

I UNITED. 5.1. .4

PA ENT o en. v

THEODORE SCHEFFLER, OF PATERSON, NEW JERSEY, ASSIGNOR, BYDIREGT v AND MESNE ASSIGNMENTS, TO OTTO ELOHR, OF NEWVARK, N. J.,' AND FRANCIS M. PIERCE, OF BROOKLYN, N. Y. 1

FRICTIQN-CLUTC H.

SPECIFICATION forming part of Letters Patent. No. 292,140, dated January 15, I854.

To aZl whom it 11mg concern:

Beit known that I, THEODORE ScHEFF-LER,

. a citizen of the United States, residing at Paterson, in the county of Passiac and State of 5 New Jersey, have invented certain new and useful Improvements in Friction-Clutches,- of which the following is a specification.

This invention relates to that class'of friction-clutches which couples one rotary part to IO another when revolving in one direction, but

" automatically uncouples them when a reverse rotation is commenced, being what are commonly known as one-way clutches. My

improved clutch is designed to afford great I 5 strength and reliability with the utmost simplicity of construction, and it is provided'with means for disengaging it at will, and thereby freeing the driven part, so that the latter may.

be revolved in either direction.

' 2c The accompanying drawings show my improved clutch as applied to a hoisting-drum.

Figure 1 is a longitudinal mid-section of the drum cut in the plane of the line 1 1 in Fig.

2. Fig. .2 is a transverse section of the same, the plane of the section passing between the drum and the wheel, as denoted by the line 2 2 in Fig. 1. Fig. 3 is a longitudinal mid-section, cut in the plane of the line 3 3 in Fig. 2. Fig. 4. is a fragmentary sectional plan, the in- 0 ternal parts beingshownin plan and the drum and wheel in section. Fig. 5 shows the divided friction-ring removed, and Fig.6 shows the lever removed. Let A denote a gear-wheel fastened to the v3 5 shaft B of a hoisting-engine, and O a winding drum, which turns loosely on the shaft. The wheel A is driven by a pinion, D, and turns always in the direction of the arrow at in'Fig.

2. In hoisting, the drum 0 is coupled to this 4.0 wheel and revolves with it; but when theload is lifted high enough and it is desired to lower it, the clutch is disconnected and the drum is revolved backward by the descending load in f the manner commonly practiced in the use of The wheel A hasan annular overhanging flange, b, the interior of which is turned to a trueand smooth surface. Inside of this fiangeis fitted Application filed October 31, 1883. {No model.)

azi'riction-ring, E, the periphery ofwhichis turned true and smooth, and which is divided. 5o.

diametrically into twohalf-rings, asshown. best in Fig. 5; The ends 0 c of these half. rings-abut, buttheir ends (I d are separated somewhat. A lever, G, is formed withah ead,

e, a tail, f, and a fulcrum-pin, g, as best'shown 5 5 in Fig, 6. The pin 9 fits into a cylindrical hole. 9, in one of the halves of the ring E, near its end at. (Best shown inFig. 5.) Whenthe le ver is thus fulcrumed to the ring E, its head 6 projects, into the space betweenthe ends'd 6o and d, and the end surface of the head bears against. the end (1 of the half-ring, If mow the lever be rocked in the direction of the arrow 6, its head moving in the direction of the arrow 7 will force the end-d of the ring away 6 5 fro'mthe end at; and so expand the ring Eand cause it to bind tightly against the inner surfaceof the flange b. The drum 0 comes against the-edge of the flange 1) and ring E, and holds the latter in place,.as shown in Fig. 3, while the lever G projects intoa cavity in the end of the drum. Two pins, F and H, are-fixed to the end of the drum. The pin F comes against the under side of the tail f of the lever G, and thepin H comes against the end of its head '6, as best shown in Fig. 2. In hoisting, the wheel A turns in the direction of the arrow to, and it tends to carrythe ring E and lever G around with it. This brings the tail of the lever against the pin F, which resists it in the direction of arrow 5. The further movement of the lever tilts it in the direction of arrows 6.and7, and causes it to expand the ring E in the direction of arrows 8 and 9.

This quickly locks the ringE to the wheel A,

and the continued pressure of the lever G against the pin F forces the latter and the drum 0 to rotate with the wheel A. The greater the resistance to the rotation of the drumthe tighter is itcoupledto thewheel A. 0 The pin H is not brought into use while the clutch is coupled.

The drum Obears a sliding pin or bolt, I, having a tapered or beveled end, t, which comes beneath the head 6 of the leverG, as 5 best shown in Fig. 1. IVhen the wheelAhas been stopped and it is desired to'disengage the clutch, so that the drum may revolvebackward, this pin I is to be pressed in, so that its tapered end shall wedge the head of the lever upward or outward, and cause it to bear with less force upon the end at of the ring until it is so far displaced that it exerts no pressure uponthe ring, and the latter turns freely: The drum may then be turned in either direction, so long as the pin I is kept pressed in. In turning forward the pin H pushes the le ver G and ring E around with the drum, and in turning backward the pin F performs the like function. \Vhenever the drum turns independently of the wheel A the ring E re-' volves freely in the flange 1).

The pin I may be moved by any suitable mecha'n'ism-suclnfor instance, as that shown whieheonsists of v a sleeve, J, sliding on'the shaftB, and having an arm, to which the pin is attached. This sleeve may be moved by a lever','K-, Fig. 3, or otherwise. Only a very slightmotion is required to either couple or uncouplethe parts, so that the clutch acts very quickly as soon as the pin I is drawn back: As-the clutch acts only in one direc-' tion, the drum may be turned forward by hand when the engine is at rest, and there is no load-upon the drum without pressing on the releasing-pin.

I have'deseribed my invention as applied to a'hoisting-drum; but it may also be used for transmitting motion to a pulley, or from one shaft to another in line therewith, in whichcase the pins F, H, and I will be attached to a plate fastened to the second shaft. It is-a'lso obvious that the part which carries the pins F, H, and Imaybe the driving part,

and'transmit motion to the part to which the I flange b is fixed.

My clutch may also be applied in placeof a ratchet and pawhfor causing an oscillating part to impart a forward rotation to the driven part, as for drilling and other purposes.

I am well aware that friction-clutches which grip-only in one direction have been before invented; also thatthe employment of divided or sectional friction-rings in friction-clutches is not new, and also that levers have been used to expand such rings.

\Vhat I claim as new, and desire to secure by Letters Patent, is- I 1. The combination of two rotary parts, one of which is adapted to drive the other inone direction through the medium of a frictionclutch, with a clutch consisting of an annular flange 011 one of said parts", a pin on the other, a'divided expansive ring within said flange,; and an expanding-lever fulcrumed to said ring on one'side of a division therein, bearingagainst the same on the opposite side of saiddivision, and adapted to be actuated to expand the ring by the pressure of said pin, substantially as set forth.

2. Ina friction-clutch, the combinationflof annular flange I), expansive divided-ring-E, lever G, fulcrumed to said ring on-- one sideof a division therein, and bearing against-it on the opposite side of said division, and pins F and H, acting against said lever, substantially as set forth.

3. In a friction-clutch, the combination ofannular flange I), expansive divided ringiE. cxpanding lever G, fulcrulned to and extending against said ring, clutching-pin F, and re leasing-pin I, all arranged and adapted to' opcrate substantially as set forth.

THEODORE SCHEFFLER \Vitnesses:

ARTHUR C. FRASER, HENRY CONNETT.

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