US852469A

US852469A - Clutch mechanism for dumb-waiters and the like.

Info

Publication number: US852469A
Application number: US34416706A
Authority: US
Inventors: Albin Svenson
Original assignee: Individual
Current assignee: Individual
Priority date: 1906-11-19
Filing date: 1906-11-19
Publication date: 1907-05-07
Anticipated expiration: 1924-05-07

Description

PATENTED MAY 7, 1907.

A. SVENSON. CLUTCH MECHANISM FORDUMB WAITERS AND THE LIKE.

APPLICATION FILED NOV. 19, 1906.

ZSHEBTS-SHBET 1.

' WITNESSES INVENTOH 0% f No. 852,469. PATENTED MAY '7, 1907.

' A. SVBNSON. OLUTCHMEGHANISM FOR DUMB WAITERS AND THE LIKE APPLICATION FILED NOV IQ, 1906, v

2 SHEETS-SHEET 2.

W/TNESSES I INVENTOH A 7'TOR/VEI ALBIN SVENSON, OF NEW YORK, N. Y.

CLUTCH MECHANISM FOR DUMB-WAETERS AND THE LlKE- Specification of Letters Patent.

Patented May '7, 1907.

Application filed November 19, 1906. Serial No. 344,167.

To all whom it may concern.-

Be it known that I, ALBIN SvnNsoN, a subject of the King of Sweden, residing at the borough of Manhattan, city of New York, in the county and State of New York, have invented certain new and useful Improvements in Clutch Mechanism for Dumb-Waiters and the Like, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings and the reference characters marked thereon.

This invention has relation to clutch mechanism for dumb waiters, especially such as are employed in houses and apartments for domestic uses, but the improve ments are applicable as well in connection with similar cars or carriers for other uses. Again, while the improved apparatus is ordinarily; intended to be operated by hand, it might be otherwise operated if so preferred.

The principal objects of the invention are to provide or produce clutch mechanisms or appliances for operating dumb-waiters which are offew and simple parts, easily located in place and which will automatically effect the stopping of the car either in its descent or as- 1 cent within its shaft whenever its move ments cease to be controlled by the hand rope, as for instance, when too much load is put upon it in excess of the counter-weight or when the counter-weight exceeds by too much the weight of the car and its load.

Subordinate objects are to provide simple and reliable means for releasing the clutch after the car has been automatically arrested. by it and thereafter permit the car to move until again automatically arrested under similar conditions,-to make the clutch easily adjustable or regulable from the exterior,and to make the parts efficient and durable.

To accomplish the foregoing objects and to secure other and further advantages in the matters of construction, operation, application and use, my improvements involve certain new and useful relative arrangements or combinations of parts, peculiarities of construction and principles of operation, as will be herein first fully described and then pointed out in the claims.

In the accompanying drawings forming part of this specification, Figure 1 is a vertical view showing a section of a dumb-waiter shaft and an elevation of my improved ap pliance mounted therein, the car being at nearly the upper limit of its travel. Fig. 2 is a top or plan view of the frame for the operating appliances and the appliances mounted thereon as in Fig. 1, the wheel for the operating rope being omitted. Fig. 3 is a vertical section and elevation of the appliance shown in Fig. 2. Fig. 4 is a section and elevation on a plane through line 4l4 of Fig. 3 and looking in the direction of the contiguous arrow, a portion of the movable plate being broken away to expose a portion of the interior of the drum. Fig. 5 is a section and elevation on a plane through line 5-5 of Fig. 3 and looking in the direction of the contiguous arrow. Fig. 6 is a section and elevation on a plane through. line 66 of Fig. 5, showing the manner of mounting the connecting rods and connecting the clutch plate with the grooved wheel which forms the front Wall of the drum.

In all these figures like letters of reference, wherever they occur, indicate corresponding parts.

A represents the dumb-waiter or elevator shaft, B is any approved car or carrier mov-' able up and down within the shaft, C is a counter-weight or counterbalance for the car, and D is a rope or cable, of suitable length, connected at one end with the counter-weight and at the other with the car, passing over a suitable pulley connected with the clutch mechanism and being suitably guided, as by guide pulleys, a and b, or otherwise as may be preferred.

E is the operating rope or cable, usually called the hand rope, by which the movements of the car in the shaft are effected. This rope passes over a suitable grooved wheel, represented at F, Fig. 1, which is keyed upon or otherwise connected with the shaft G on which the movable parts of the clutch mechanism are mounted.

The hand rope wheel and the clutch mechanism are sustained in the elevator shaft on any suitablesupports, as upon timbers represented at c and d, and the hand wheel is capable of being located and secured at different points on the shaft G to adapt the improved device for use in connection with different sizes of cars, the shaft G being made of any desired length.

Other timbers or frame pieces, as e, e, are employed to sustain the stationary friction ring in the position to which it may be adjusted.

H is a grooved pulley or wheel over which the rope or cable D is passed, and extending from this wheel, either being formed integrally therewith or otherwise rigidly applied, is a hollow drum 1, the wheel and drum being loosely mounted on the shaft G to as to be capable of turning independently thereof, a collar as f and a set screw as g, or other equivalent mechanical means being employed to prevent the grooved wheel and drum at one part from sliding longitudinally on the shaft, they being prevented from sliding too far away from the collar by an interior spider which is keyed or otherwise securely coupled with the shaft.

K is the spider keyed, as at h, upon the shaft and compelled to turn therewith, the

spider being located within the drum and.

having projecting arms, as 'i, i, on one side and other arms, as k, 7c, on the other side. W

The interior of the drum or the back of the wheel H is provided with lugs, as Z, Z, made rigid with respect to the wheel and intended to be struck by the arms i, i, upon occasion to move the drum and the applied wheel H, and therefore the car, accordingly as the hand rope wheel is moved.

L is a friction ring located adjacent to the open end of the drum and prevented from revolving. This ring is supplied with projecting arms, as m, m, which are conveniently held upon the pieces e, e, by applied boxes, as n, n, which may be easily removed and located at the desired points. The ring is capable of a: slight adjustment in the sup orting boxes, and on the arms m, m, are ugs, as 0, 0, for the purpose of preventing the friction ring from being carried out of its proper working position, the

lugs

0, 0 extending at right angles to the stationary ring and embracing the clutch plate between them, as shown in Fig. 2.

M is a clutch plate mounted so as to turn easily on the shaft G and located outside the friction ring L. This clutch plate is con nected with the grooved wheel H by rods N which are most conveniently made to pass through openings provided for the purpose in the said wheel and in the clutch plate.

On one extremity these tie rods are provided 7 with cross heads, as p, p, conveniently seated in recesses provided for them and effectually preventing withdrawal of the connecting rods in the direction of the strains to which they are subjected while at the same time the rods are permitted to move in the manner required. The opposite ends of the rods are threaded and supplied with hemispherical nuts, as q, and suitable securing nuts, as 1", r, as indicated in Fig. 6.

Being thus constructed and arranged, when the hand wheel is turned, the spider will compel the simultaneous turning of the grooved wheel H in the corresponding direction. When the hand rope is released, if the -car and its load and the counter-balance are rise and the other to descend, thereby turning the grooved wheel H, and as soon as this commences to move, the connecting rods are inclined, thereby drawing the clutch plate and the drum against the stationary friction ring. By this means the movement of the car is instantly and automatlcally checked, the parts being securely'frictionally clutched, as will be apparent. To release the clutch it is only necessary to move the hand rope in the opposite direction until the spider K is carried back far enough to move the clutch plate to a position wherein the strain on the connecting rods will be relieved. This unolutching movement is accomplished by contact of the arms is, with the walls of slots 8 in the clutch plate through which slots the arms is project.

The effective lengths of the connecting rods may be easily regulated by adjusting the parts (1 and 1' to compensate for any wear or to regulate the power of the clutch to-correspond with the limit of weight which is intended to be carried by the car.

Being constructed and arranged for operation substantially in accordance with the foregoing explanations, the improved device is of few and simple parts, not liable to get out of order, and it will be found to admirably answer all the purposes or objects of the invention hereinbefore alluded to.

Having now fully described my invention, what I claim as new herein and desire to secure by Letters Patent, is:

1. In a device of the character herein set forth, the combination with the shaft, of a wheel and drum loosely mounted thereon, a spider located within the drum and keyed upon the shaft, said spider having arms ex-- tending oppositely on each side and the wheel having lugs for contacting with the adj acent arms of the spider, a movable clutch plate and a stationary friction ring, the spider being arranged to move the drum and its connected wheel and the clutch plate, and rods extending through the friction ring for connecting the clutch plate and the wheel, substantially as and for the purposes explained.

2. In a device of the'character herein set forth, the combination of the grooved wheel having lugs thereon, a spider having arms extending on opposite sides thereof, a revoluble shaft, clutch plate, stationary friction ring and connecting rods passing through the plate, ring and wheel, the connecting rods being arranged to be inclined by independent movement of the wheel, substantially as and for the purposes explained.

3. The combination as before set forth, of the grooved wheel having lugs thereon, the spider having arms extending on opposite sides thereof, the clutch plate, the stationary friction ring and the tie rods, said rods being provided with cross heads and with threaded portions and adjusting nuts and the wheel being provided with recesses to receive the cross heads, substantially as and for the purposes explained.

4. In a device of the character herein set forth, the combination with the grooved wheel, the drum, the shaft and the spider keyed on the shaft, of the clutch plate slotted as shown, the spider being located within the drum, having arms extending on opposite sides thereof, one set of said arms projecting through the slots in the clutch plate and the wheel having lugs for contacting with the other arms on the spider, substantially as and for the purposes explained.

5. In a device of the character herein set forth, the combination with the drum and the clutch plate, of the stationary friction ring, said ring being located between the drum and the clutch plate and provided with lugs eX tending at right angles to the ring and embracing the clutch plate between them for maintaining the ring in operative position, substantially as shown and for the purposes explained.

' In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

ALBIN SVENSON.

Witnesses:

O. SEDGWICK, J. M. HOWARD.