US901314A - Safety-brake for elevators and mine-cages. - Google Patents

Description

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SAFETY BRAKE FOR ELEVATORS AND MINE GAGES. APPLICATION FILED DEG.6,1907.

Patented Oct. 20, 1908.

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A. BARBIEUX. SAFETY BRAKE FOR ELEVATORS AND MINE GAGES.

APPLIOATIOI FILED DEC. 6, 1907.

Patented Oct. 20, 1908.

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fragmentary side view looking toward the AUGUSTE BARBIEUX, OF MECCA, INDIANA.

SAFETY-BRAKE FOR ELEVATORS AND MINE-CAGES.

Specification of Letters Patent.

Application filed December 6, 1907.

Patented Oct. 20, 1908.

Serial No. 405,433.

To all whom it may concern:

Be it known that I, AUoUsTn BARBIEUX, a citizen of the United States, residing at Mecca, in the county of Parke and State of Indiana, haveinvented new and useful Improvements in Safety-Brakes for Elevators and Mine-Cages, of which the following is a specification.

This invention relates to improvements in automatic safety brakes for elevator cars, mine cages, etc., the objectof the invention being to provide a simple, reliable and efficient construction of brake mechanism which will be automatically set into action upon the breakage of the hoisting rope or cable. to stop the downward descent of the cage or car.

The invention consists of the features of construction, combination and arrangement of parts hereinafter fully described and claimed, reference being had to the accompanying drawings, in which.:-

Figure 1 is a view in front elevation showing the application of the invention, and illustrating the position of the parts when the clutch dogs or catches are thrown into engagement with the clutch teeth on the guides. Fig. 2 is a section on the line 22 of Fig. 1, showing the clutch dogs and controlling devices therefor in normal or retracted position. Fig. 3 is a similar View showingthe clutch devices in the locking Fig. 1 is a outer side of one of the guides and the adjacent set of clutch devices.

Referring now more particularly to the drawings, the numeral 1 designates the usual guides, and 2 an elevator car, shown in the present instance in the form of a mine cage, the said cage comprising a bottom 3, a head beam 4, standards or tie-bolts 5 connecting the beam with the center of the bottom 3 at opposite sides of the latter, and braces 6, said braces being divergently disposed in pairs at each side of the cage and connected at their upper ends to the beam 4 and at their lower ends to the bottom 3. Of course, the specific construction of the cage or elevator is to a large extent immaterial, as the invention may be applied to cages and elevator cars varying widely in construction.

The hoisting rope or cable 7 is connected at its lower end by a ring or eye 8 with a ring or eye 9 upon the upper end of a sliding draw-bar or actuating bar 10, which bar is movable vertically in an opening in the head 4 and extends below the latter. The lower end of the bar carries a head or nut 11, and surrounding the bar between said head or nut and the'beam f is a coil spring 12 of suflicient strength to throw the clutch devices into action upon the breakage of the cable 7. Bearing plates 13 are secured upon the ends of the beam 4: and provided with outwardly extending guide flanges 14k engaging the guides 1. Ears 15 projectupwardly and inwardly at an angle to the plates and above the bottom and are connected by eyes 16 with bracing chains 17, which chains are attached at the upper ends to the ring or eye 8. It will be understood from this construction that under normal conditions, the rod 10 will be drawn upwardly to the limit of its movement to hold the spring 12 compressed and the chains 17 taut, the chains serving in connection with the bar to support the elevator car from the hoisting cable. J ournaled in the bearing plates 13 below and on opposite sides of the beam 4 are parallel rock shafts 18 to the intermediate portions of which are attached actuating crank arms 19, connected by link bars 20 with a cross-head 21 secured to the upper end of the actuating rod or bar 10. On the ends of the shafts 18 are clutch dogs or catches 22 arranged outside the bearing plates 13 below the guide flanges 14 and adapted to engage opposite sets of ratchet or clutch teeth 23 formed in the sides of the guide bars 1.

In the normal operation/of the cage or ele' vator car, the supporting action of the cable 7 and the weight of the cage or car holds the actuating rod or bar 10 in its normal upward position, by which the clutch dogs are held outwardly from engagement with the 'clutch teeth on the guides, as shown in Fig.

2. If, however, the said hoisting rope or cable should break, the spring 12 will immediately slide or draw the bar 10 downward, whereby downward motion will be transferred by the link arms 20 to the cranks 19, thus throwing the clutch dogs 22 inwardly into engagement with the clutch teeth 23 and stopping the descent of the car before it has traveled any considerable distance and acquired any momentum.

The mode of resetting the parts for operation upon the repair of the cable will be readily understood from the foregoing description.

It will be seen that the invention provides a simple, reliable and eflicient construction of clutch mechanism which will be automatically operated when the hoisting cable breaks to positively connect the cage with the guides and thus prevent the cage from descending the shaft.

Having thus fully described the invention, what is claimed as new is In a safety brake mechanism for elevators, the combination of guides provided upon the opposite sides thereof with clutch teeth, a car having a head beam, bearing plates vertically mounted upon the ends of the head beam and provided with outwardly eX- tending vertical. flanges forming guides, depending bearing portions projecting below the head beam and ears projecting above the head beam, a vertically sliding bar mounted upon the head beam and adapted to be con nected with the hoisting cable, spring means for resisting the upward movement of said bar and drawing the same downward when the cable breaks, stay connections between the upper end of the bar and the ears of the bearing plates, rock shafts extending across the car in parallel relation below and on 0pposite sides of the head beam and journaled in the depending bearings of the bearing plates, dogs upon the outer ends of said shafts to engage the clutch teeth of the guides, a cross head upon the upper end of the bar, crank arms upon the intermediate portions of the shafts, and links connecting said crank arms with the cross head.

In testimony whereof I aflix my signature in presence of two witnesses.

AUGUSTE BARBIEUX.

WVitnesses VERNON BRADFIELD, GEORGE A. BRAOKNEY.

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