US841558A - Tripper or deliverer for belt conveyers. - Google Patents

Description

.1 Io.841,5t' 8. PATENTED JAN.15,1907.

- E. H. MESSITER.

TRIPPER OR DELIVERER FOR BELT GONVEYERS APPLICATION FILED APR.8. 1905.

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No. 841,56 8. 'PATENTED JAN. 15, 1907.

- E. H. MESSITER.

TRIPPER 0R DELIVERER FOR BELT- GONVEYERS.

APPLI ATIQNHLED pm. 1905.

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UNITED STATES EDW'IN H. MESSITER, OF NEW YORK, N. Y.

TRIPPER OR DELIVERER FOR BELT CONVEYERS.

Specification of Letters Patent.

Patented Jan. 15, 1907.

Application filed April 8. 1905- Serial No. 254,485.

T0 0% whom it may concern:

Be it known that I, EDWIN H. MEssrrER, a citizen of the United States, and a resident of the borough of Manhattan, in the city, county, and State of New York, have invented new and useful Improvements in Trippers or Deliverers for Belt Conveyors, of which the following is a specification.

This invention relates to trippers or deliverers for conveyers, and more particularly to trippers or deliverers for belt conveyors, the principal object of the invention being to provide a tripper or deliverer which is adapted for very rapid travel and for a quick reversal of the direction of movement at the end of its path.

A further object of the invention is to provide a tripper or deliverer of such construction that it may be driven by the belt in one direction at a speed equal to the speed of the belt and also driven by the belt in the opposite direction at the rate of speed desired.

A further object of the invention is to provide a tripper or deliverer which is adapted to be actuated by a conveyer-belt and which does not include any gears or pinions.

The objects above stated and others which will hereinafter appear are attained in the mechanism illustrated in the accompanying drawings and fully described in this specification, and the scope of the invention is clearly defined in the appended claims, it be ing understood that changes in the apparatus within the scope of the claims may be made without departing from the spirit of the invention or sacrificing its advantages.

In the drawings, Figure 1 is a view in side elevation of the improved tripper or deliverer, a portion of the conveyer-belt, the devices for reversing the direction of movement, and a portion of the supporting-framework of the conveyer. Fig. 2 is a view in vertical section on the line 2 of Fig. 1, the view being taken in the direction indicated by the arrow. Fig. 3 is a sectional detail view on the line 3 3 of Fig. 4, showing the mode of supporting the shaft of the traction wheel and lower bend-pulley. Fig. 4 is a detail view, partly in side elevation and partly in section, taken on the line 4 4 of Fig. 3.

Referring to the drawings by the reference characters marked thereon, A designates the deck of a belt conveyer as commonly constructed, troughing-idlers B being supported at suitable intervals upon the deck.

C designates the conveyer-belt, which travels over the troughing-idlers in the usual manner and is driven by any preferred form of driving mechanism. The tripper is supported upon track-rails D, which are preferably mounted, as shown, slightly above the troughing-idlers B. The tripper is provided with flanged supporting-wheels 1, which rest upon the track-rails D in the usual manner, and a suitable framework 2, which is carried by the supporting-wheels, carries the receiving-hopper 3 and the driving mechanism of the tripper. The belt C passes around an upper bend-pulley 4, arranged adjacent to the hopper 3, and then around a lower bendpulley 5, which is referably of larger diameter than the ben -pulley 4 and is arranged somewhat behind the up er bend-pulley in gniler to impart the usual ogee curve to the The upper bend-pulley 4 is mounted on the shaft 6, which turns in fixed bearing-blocks 7 but the lower bend-pulley 5 is carried by a shaft or axle 8, which turns in spring-supported bearings 10, each of which is formed in the lower part of a sliding frame 11, which works between fixed guides 12, mounted on the tripper-frame. Each sliding frame 11 rests upon a coil-spring 13, which is supported by a hanger 14, which is adjustably held by screws 15, threaded in lateral extensions of the hanger and resting upon the side bars of the tripper-frame 2. Besidesaffording support for the lower bend-pulley 5 the shaft or axle 8 has rigidly attached to its ends a pair of traction-wheels 16, each of which is adapted to engage one of the track-rails D.

The sliding frames 11, in which the bearings 10 for the shaft or axle 8 are placed, are normally raised by the springs 13, as indicated in Fig. 3, and when the sliding frames 1 1 are thus raised the wheels 16, carried by the shaft 8, are raised out of contact with the track-rails and are brought into contact with brake-shoes 17, which are stationary and which prevent rotation of the wheels. Each brake-shoe 17 is attached to a brake-bar 18, one end of which turns on a pivot 1.9,projecting laterally from the tripper-frame, and the other end of which may be adjusted to compensate for wear upon the brake-shoe, adjusting-nuts 20 being provided on a screw 21, which extends through the free end of the brake-bar for that purpose. The screw 21 extends downward from a lateral projecting bracket 22, carried by the tripper-frame, as best shown in Fig. 3.

In order to depress the shaft or axle 8 and bring the traction-wheel 16 into engagement with the track-rails D, a lever 23 is pivotally connected with each sliding frame 11 at the top and is fulcrumed on a pivot 24, carried by a vertical. link 25, which is preferably mounted at its lower end on the pivot 19 of the brake-bar 18. The lever 23 is actuated by an arm 26, rigidly attached to a shaft 27, which extends transversely of the tripperfi'ame and has attached thereto, near either end, one member 28 of a pair of toggle links or levers, the other member 29 being pivoted to the lever 23. The lever-arm 26 is provided at its free end with a roller 30, which is adapted for engagement with a tripping-cam 31 near one end of the range of the trippers travel and a tripping-cam 32 near the other end of the trippers travel. The cam 31 presents an upwardly-inclined cam-face over which the roller 30 moves, and when the roller 30 passes over the face of the tripping cam 31 the lever-arm 26 is raised to the position shown in dotted lines in Fig. 1, thus rocking the shaft 27 sufficiently to shift the toggle-links 28 and 29 into the dotted-line position, and thereby to depress the end of each lever 23, which is attached to one of the sliding frames 11. The depression of the frames 11 brings the traction-wheels 16 into engagement with the track-rails D, as indicated in dotted lines in Fig. 1, and when the lever-arm 26 reaches its dotted-line position it is arrested bya stop 33, which projects laterally from the side of the tripper-frame. The action of the springs 13 against the corresponding sliding frames 11 tends to force the sliding frames upward and to depress the ends of the levers 23, which are connected with the toggle-links. This tendency is. overcome by the stop 33, against which the lever-arm 26 is pressed, and as the togglelinks are forced past the position of alinement by the action of the tripping-cam 31 upon the lever-arm 26 the lever-arm 26 remains in the position shown in dotted lines until it is depressed. The depression of the leverarm from the dotted-line position to that shown in solid lines is brought about by the tripping-cam 32.

The operation of the tripper or deliverer is as follows: The belt 0 travels in the direction indicated and tends to impart rotation to the lower bend-pulley 5 in. the direction opposite to the movement of the hands of a clock. When the lower bend-pulley 5 is raised, as shown in solid lines in the several figures, the rotation of the bend-pulley is opposed by the action of the brake-shoes 17 upon the traction-wheels 16, which are rigidly mounted on the shaft or axle 8, to which the lower bendpulley is also rigidly secured. The springs 13 are sufficiently powerful to hold the traction-wheel 16 in such forcible contact with the brake-shoes that practically no rotation of the lower bend-pulley will take place, and consequently while the said lower bend-pulley is raised the friction of the belt C upon the lower bend-pulley will cause the tripper to move forward at the speed of the belt. WVhen the tripper nears the forward end of its path, the engagement of the roller 30 with the tripping-cam 31 will raise the lever-arm 26 to the dotted-line position and move the traction-wheels out of contact with the brakeshoes 17, allowing the lower bend-pulley and the traction-wheels to rotate in the direction indicated. The lowering of the bend-pulley and traction wheels brings the traction wheels into engagement with the track-rails D, over which the traction-wheels slide until the friction developed is sufficient to arrest the forward movement of the tripper. As

soon as the forward movement of the tripper is arrested the action of the traction-wheels upon the track-rails will cause the tripper to travel backward toward the rear end of its path, and this travel will be continued until the roller 30 is brought into engagement with the tripping-cam 32, by which engagement the lever-arm 26 will be depressed, and the springs 1 3 will then raise the lower bend-pulley and track-wheels until the latter are brought into engagment with the brake-shoes 17, which gradually stop the rotation of the traction-wheels and arrest the rearward movement of the tripper. As soon as the rearward movement of the tripper is overcome the friction of the belt on the lower bendpulley, which is held stationary by the action of the brake-shoes on the tractionwheels, will cause the tripper to travel again in a forward direction.

The space required for the reversal of movement of the tripper at each end of its path will depend upon the rate at which the tripper is traveling and the degree of friction developed between the traction-wheels and. the track-rails or the brake-shoes. If the rate of travel of the tripper is very rapid, a considerable space will be required to arrest its movement if the friction ofthe tractionwheels against the track-rails or the brake shoes is the sole means employed for arresting the movement of the tripper. In such cases it may be desirable to supplement the arresting effect of the friction of the tractionwheels by means of a yielding buffer of any suitable construction. (Not shown.) Ordinarily, however, such a buffer will not be required. Hence none has been illustrated.

As the tripper moves forward at the speed of the belt the tripper has no discharging effect during its forward movement; but when the tripper is moving rearward the load on the belt will be discharged into the hopper 3, from which it passes downward and to one side through a discharge-chute 3 of any suitable construction.

When the brake-shoes 17 become worn from use, the wear may be compensated for by adjusting the nuts 20 on the screw 21 to depress the free ends of the brake-bars 18, and the pressure exerted by the springs 13 against the sliding frames 11 to raise the traction-wheels against the brake-shoes can be regulated by means of the screws 15, by which the supporting-hangers 1 1 are carried.

While the tripper and tripper-operating mechanism above described are primarily intended for use with rapidly-moving belts, it is obvious that they may be used with belts traveling at low rates of speed as well.

It will also be seen that the tripper-operating mechanism is extremely simple in construction and is characterized by the absence of all intermeshing gears and pinions, thus reducing its cost to a minimum and so preventing stripping of gear-teeth, which would be liable to occur in the ordinary geared tripper if operated at high speed and suddenly reversed.

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

1. A. tripper or deliverer for conveyers having a traction-wheel shiftable into and out of engagement with a track or support.

2. In a tripper or deliverer for conveyers, a shiftable traction-wheel and means for mov ing the traction-wheel into and out of engagement with the track or support.

3. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support, and means for applying power continuously to said traction-wheel.

4. In a tripper or deliverer for conveyers, a shiftable traction-wheel, means for supplying power to said traction-wheel and means for moving said traction-wheel into and out of engagement with the track or support.

5. In a tripper 0r deliverer for conveyers, a shiftable traction-wheel driven by the conveyer and adapted for movement into or out of engagement with the track or support.

6. In a tripper or deliverer for conveyers, a traction-wheel shiftable into or out of engagement with the track or support, and a pulley or drum operatively connected with the traction-wheel and directly driven by the conveyer.

7. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support, means for applying power to the lJIiLCtlOII-XVllQGl, and a brake arranged to operate upon said traction-wheel when out of engagement with the track or support.

8. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support, and a fixed brake with which the traction-wheel engages when out of engagement with the track or support.

9. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support, a brake with which said traction-wheel contacts when not in engagement with the track or support, and means for holding the traction-wheel normally in contact with said brake.

10. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with the track or support and an adjustable brake with which said traotion-wheel contacts when not in engagement with the track or support.

11. In a tripper or deliverer for conveyers, a shiitable traction-wheel adapted for movement into or out of engagement with a track or support, and a spring by which said traction-wheel is normally held out of engagement with the track or support.

12. In a tripper or deliverer for conveyers, a shiftable traction;wheel normally held out of engagement with the track or support, and means for forcing said traction-wheel into engagement with the track and holding it in such engagement.

13. In a tripper or deliverer for conveyers, a bend-pulley over which the conveyer runs and a traction-wheel rigidly connected with said bend-pulley.

14. In a tripper or deliverer for conveyers, a shiftable bend-pulley over which the conveyer runs, and a traction-wheel rigidly connected with said bend-pulley.

15. In a tripper or deliverer for conveyers, a vertically-shiftable bend-pulley over which the conveyer runs, and a traction-wheel rigidly connected with said bend-pulley.

16. In a tripper or deliverer for belt conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support and means for shifting said traction-wheel, said shifting means including a lever and a pair of toggle-links.

17. In a tripper or deliverer for conveyers, a shiftable traction-wheel and means for shifting the traction-wheel said shifting means including a lever, a pair of toggle-links, and a stop to limit the movement of said lever.

18. In a tripper or deliverer for conveyers, a shiftable traction-wheel adapted for movement into and out of engagement with a track or support, means for holding said traction-wheel normally out of engagement with the track or support, and means including a tripping-cam for overcoming said means for holding the traction-wheel normally out of engagement with the track or support and for forcing the traction-wheel into engagement with said track or support. 19. In a traveling tripper or deliverer for belt conveyers, means for obtaining a hold on the belt to cause the tripper to travel in a IIC forward direction at the speed of the belt, a l veyers, means for imparting movement to traction-Wheel, and means for transmitting movement from the belt to the traction- Wheel to cause the tripper to travel in the direction opposite to the travel of the belt.

20. In a traveling tripper for belt conveyers, means for automatically reversing the direction of travel of the tripper, said means comprising a shiftable traction-Wheel driven in a direction adapted to impart movement to the tripper 1n the direction opposite to its direction of travel and means for moving said traction-Wheel into engagement With a track and holding it in such engagement.

21. In a traveling tripper for belt conthe tripper, said means comprising a beltdriven traction-Wheel engaging a track or support, and means for reversing the direction of movement of said tripper, said reversing means including means for moving said traction-Wheel out of engagement With the track or support and applying a brake thereto.

In testimony whereof I have signed my name in the presence of two Witnesses.

EDWIN H. MESSITER.

Witnesses:

H. RICHARD W6BsE, BAXTER MORTON.

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