US723196A - Clutch. - Google Patents

Description

PATENTED- MAR. 17, 1903.

E. DYSTERUD.

CLUTCH.

APPLICATION FILED 11.23. 1902.

N0 MODEL- M T N E V m WITNESSES I A TTOHNE Y S l PATENT OFFICE.

" MIL DYSTERUD, or MONTEREY, MEXICO CLUTCH.

srncmxcnrrron forming part of Letters To all whom it may concerm.

Be it known that I, EMIL DYSTERUD, a citizen of the United States, and a resident of Monterey, in the State of Nuevo Leon, Mexico, have invented a new and Improved Clutch,

of which the following is a full, clear, and exact description.

trifugal arms actuate This inventionrelates to a centrifugal clutch designed especially for use in connection with alternating-current electric motors or loose pulleys, by which means the motor is not coupled with its load until the full speed of the motor or pulley has been attained. An example of a clutch thus applied may be dated December 18, 1900. sInthis patent centhe clutch, and these I arms are held inactive by a spring. The arms are ofconstant weightyand as the rotary part i of the motor moves (to which part the arms are attached) the arms swing out gradually as the speed of the rotary prirt increases, and the anc ent-neat the clutch is thusgradually applied and themotorgradually connected. with its load. The

5 motor before :its full -=-the very object of theidevice is to that extent result is that partof theload is applied to the speed is attained and -defeatedy h i i i The prime object of my present invention isto'h'oldthe-clutchcompletely off until the motor is' attained and then fore my invention' 're'sides i-n acentrifugally-- actuated controllerfor automatically allow ing the centrifugally-actuated parts of the centrifugal clutch to become active whena certain speed has been 'att'ained. This is done by affecting the parts' i 'tllii pdsitivelyor nega tively-that is, either 'by increasing the heft of the centrifugally-actuated parts or removing a restraining load from such parts-so that when a certain speed is reached said parts will move outward much more rapidly, and thus instantly begin the application of the clutch. By this device the motor is free to turn unrestrained by its load during the entire period of starting and no part of the load is applied until the full speed has been very nearly attained, at whichperiod, owing to the above-explained change in the condition of 'the centrifugally-actuated parts','t he clutch is instantly fully applied. This specification is adescription of one form of my invention-namely,-a form in which the controller acts at a certain period positively to increase the heft of the centrifugally-actuated parts--while the claims are definitions of theactual scope of the invention.

Reference is to be had to the accompanying 6o drawings, forming a part of this specification, in which similar characters of reference indi- 'cate corresponding parts in both views.

Figure 1 is a face view of the invention,

and Fig; 2 is a section on theline 2 2 of Fig. 1. o5 seen in the patent to Thompson, No. 664,190,

a indicates the rotary driving part, the hub a whereof is mounted loosely on the rotary driven part b. 0 indicates a clutch-disk fast to the driven part or shaft 1), and d indicates clutch-shoes working peripherally on the disk 0.

Fastened to thedriving part a are faceplates e, which have lugs-e, wherein are -mounted the stems d of the shoes 01, and d indicates springs pressing these shoes lightly away from the driven member I). Fulcrumed between lugs e on the face-plates e are centrifugally-actuated levers, each comprising a stud or short armf, engaged with the adjacent stern d, and long arms f in the form of tubes closed at'each end, as shown. i

' i g indicates springs acting between the hollow armsfand the hubctto hold the, arms normally in the positionsshown in,-Fig;.;.2,' in

which position the: s'hoesd. are-disengaged from the disk 0 and the d-rivingmembera is free-tote rn on the shaft b: ,rThehollowarims f" cont'ain the before-mentioned clutch-con- Ltrolling :iineansain. the ,-;1iorin.=,, of;;a.a- Shifti g we'ightg whiehrmayrhe-sand preferablyoisatlre 9o ballsh; which i may be made of: anyconvenieut heavy material, but may be replaced, if desired, by metallic mercury, giving more weight with the same space.

Referring to Fig. 2, it will be observed that when the parts are in theidle position shown the controller-weights h in the upper tubular arm f are rolled down to the free end thereof and in the lower arm are rolled down adjacent to the fulcrum end thereof. When :00 the part 0, turns slowly, the balls it will constantly change position in the arms f according to the position of the armsthat is,

when either one of the two arms is above the shaft a the balls h will move toward the free end and when below the shaft toward the fulcrum. When, however, a certain speed is reached, the balls it will move under centrifugal force to the ends of the arms next to their fulcrums. This position will be maintained until the speed of the part 0. becomes so great that the arms f moveoutward beyond parallelism with the shaft 1) and then all of the balls h are. immediately thrown into the free ends of the armsf, and thus the heft of the arms is increased, and they are therefore occasioned to move out much more rapidly.

In the ap lication of this construction to an electric motor, as explained hereinbefore,

the parts. should be so adjusted that the instant before the motor reaches its full speed the arms f will assume exact parallelism with the shaft b, but the shoes (1 will not yet be engaged with the disk 0. This condition having arrived, as the speed of the part0, increases and actually attains its high speed the arms f will move slightly farther and then all of the balls will rush to the free ends "of the arms, thus instantly increasing the heft of the ar'ms and instantly applying the shoes (1 to the disk 0, which operation fixes the parts a and b, or, in other words, connects the motor with its load.

Having thus described my invention, I claim as new and desire to secure by Letters Patept 1. The combination of a rotary driving part,

a part to be driven therefrom, a centrifugal clutch for connecting the two, said clutch including a hollow arm, in said arm to move freely therein in direction longitudinally of the arm.- 3

2. The combination of a rotary driving part, a part to be'driven therefrom, acentrifugal clutch for connecting the-two, said clutch ineluding a hollow arm and a weight movably mounted in said arm, and means for yieldipgly holding the arm in inactive position.

3. The combination of a shaft, a driving member arranged to t u rn loosely around the axis thereof, a face-plate attached to the driving member, a stem carried to slide in the driving member, a shoe held by the stem, 2. clutch-disk fastenedto the shaftv and adapted to be engaged by the shoe, a centrifugallyactuated l'ever connected with the stem at and a'weight mountedone arm, a weight movably carried by the other arm, and means for yieldingly holding said lever in inactive position.

4. The combination of a shaft, a driving member arranged to turn loosely around the axis thereof, a face-plate attached to the driving member, a stem carried to slide in the driving member, a shoe held by the stem, a clutch-disk fastened to the shaft and adapted to be engaged by the shoe, a centrifugallyactuated lever connected with the one arm, a weight movably carried by the other arm, and means for yieldingly holding said lever in inactive position, the said second-named arm of the lever being hollow and the weight being loosely fitted therein.

5. The combination of a rotary driving part, a part to be driven therefrom, a centrifugal clutch for connecting the two, said clutch being actuated from the said driving part and comprising a pivoted arm, and a weight carried loosely by said arm and movable freely toward and from the pivot thereof.

6. The combination of arotary drivingpart, a part to be driven therefrom, a centrifugal clutch for connecting the two, said clutch including a pivotally-mounted hollow arm, and a weight mounted in the said arm to move freely longitudinally thereof toward and from its fulcrum.

7. The combination of a rotary driving part, a part to be driven therefrom, a clutch for connecting the two, said clutch being normally inactive and rendered active by centrifugal force, and a mobile controller for the centrifugally-actuated part-of the clutch, the controller itself being automatically moved by the centrifugal'force when a certain speed of rotation has been attained.

8. The combination of a rotary driving part,

stem at a part to be driven therefrom, a clutch for EMIi. DYS TERUD. Witnesses: I i

C. D. BAXTER, J. L. BARTLETT.

ICO

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