US1368103A - Safety-catch for elevators - Google Patents

Description

G. BOGGIO.

SAFETY, CATCH FOR ELEVATORS.

APPLICATION FILED MAY 8, I920.

Patented Feb. 8, 1921.

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G1 ust 39 w ENTOR ATTORNEY 1,368,103. Patented Feb. 8, 1921.

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SAFETY CATCH FOR ELEVATORS.

APPLICATION FILED MAY 8. 1920A Gu as mm ATTORNEY 3 suza'rs-suzn a.

INVENTOR l/ ATTORNEY Patented Feb. 8,1921.

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SAFETY CATCH FOR ELEVATORS.

APPLICATION FILED WW8, 1920.

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GIUSTO BOGGIO, OF ROYALTON, ILLINOIS.

SAFETY-CATCH 1 0R ELEVATORS.

Application filed May 3,

T 0 all whom it may concern Be it known that I, GIUs'ro Boooro, a citizen of the United States, residing at Royalton, in the county of Franklin and State of Illinois, have invented new and useful Improvements in Safety-Catches for Elevators, of which the following is a specification.

This invention relates to elevators, particularly to those of the type lifted by means of a cable, and has for its object the provision of means whereby upon reaching the top of the shaft the cable will be auto matically disconnected from the elevator whereby to prevent tearing loose of the cable or breaking of any of the associated parts in case the elevator is drawn upwardly too far, an important feature being that catch members associated with the elevator engage over stationary members mounted within the shaft and hold the elevator securely when the cable is disconnected.

An important object is the provision of a device of this character which will be a great life saver in preventing the ling of elevators of this type, which will be automatic in action, etiicient and durable in use, and a general improvement in the art.

With the above and other objects and advantages in view the invention consists in the details of construction to be hereinafter more fully described and claimed and illustrated in the accompanying drawings in which- 1 Figure 1 is a front elevation showing my device in normal position,

Fig. 2 is a vertical longitudinal sectional view showing the catch members carried by the elevator as engaged with the stationary members extending across the shaft,

Fig. 3 is a cross sectional view through the shaft showing the stationary members in plan, I

Fig. 4 is a cross sectional view taken below the stationary catch members and showing in plan view the parts carried by the elevator, and

Figs. 5 and 6 are detail views.

Referring more particularly to the drawings, the numeral 10 designates the elevator shaft which is of any ordinary or preferred construction including suitable vertical bars, braces and other elements commonly used. in structures of this character.

The shaft also includes at the sides thereof, vertically extending guides 11 and is provided at its top portion with trans- Specification of Letters Patent.

Patented Feb. 8, 1921.

1920. Serial No. 379,904.

verse bars 12 across which is journaled a shaft 13 carrying a pulley 14 over which is trained a cable 15 having one end connected with any suitable hoistin mechanism and having its other end connected with the elevator 16. The elevator is of course disposed within the shaft 10 and is provided. with members 17 engaging the guides 11.

In carrying out my invention 1 provide stationary bars 18 secured across the top of the shaft 10 and arranged in spaced rela tion, it being preferable that spacing blocks 19 be interposed between these bars. cable 15 passes between the bars 18 and be tween the blocks 19. The outer faces of the bars 18 are inclined or beveled outwardly and upwardly, as clearly shown. Also secured transversely of the shaft 10 in spaced parallel relation to the bars 18, are other bars 20, for a purpose to be described.

Disposed above the elevator 16 and connected therewith, as by means of chains or the like 21, is a horizontally disposed member 22 which is disposed at right angles with respect to the bars 18 and 20 and this bar is formed as an elongated body provided adjacent its ends with openings 23 and adjacent its central portion with openings 24. Disposed within the openings 24 and pivoted therein, as shown at 25, are arcuate arms 26 which have their upper ends diverging, as shown. Connected with the arms 26 are other curved arms 27 which pass slidably through the openings 23 and which have their Inner faces formed with ratchet teeth 28. Coil springs 29 are disposed about the arms 27 and abut against the arms 26 and the top of the member 22, and the purpose of these springs is to urge the arms 26 toward each other. Secured upon the underside of the member 22 are spring pawls 30 which cooperate with the ratchet teeth 28.

Secured to or formed on the confronting faces of the arms 26 are lugs 31 which engage within the bore 32 of a tubular member 33 to which the end of the cable 15 is secured. Under ordinary conditions, that is when the arms 26 are disposed relatively close to each other, the lugs 31 engaging within the member 33, hold the member 33 and consequently the cable firmly associated with the elevator so that the latter may be raised or lowered by the action of whatever hoisting mechanism is employed. 1t will be observed that the arms 26 when in normal position are so arranged that their upper The ends lie vertically. beneath the spaces be tween the bars 18 and 20. V V r In the event that the hoisting mechanism is operated too long or too strongly so as to pull the elevator upwardly to an excessive degree, which would naturally result in tearing loosethe cable connection, or breaking any 01 the parts, it will be observed that the arms 26 will enter the spaces between the bars 18 and 20 andthe engagement of these arms 26 with the beveled or inclined outer sides of the bars 18 will result in outward swinging of the arms 26 and consequent downward movement of the arms 27. The arms 26 will thus be caused toextend over and catch on the bars 20. It is of course apparent that as the arms 27 move downwardly the springs 29 will be comoressed and the arms 27 will be prevented from rising again by the engagement of the pawls 30 with the teeth 28, When the arms 26 move apart the lugs 31 thereon will be retracted from engagement within the'bore 32 of the member 33 to which the hoisting cable is attached and the connection with the cable will thus be automatically discontinued. The elevator and all 01'' its parts will thus be prevented from injury as the cable may then be pulled higher without effecting the position of the elevator and it will also be apparent that the elevator will be suspended by the arms 26 resting upon the bars 20. It is readily understood that when conditions have been returned to normal the arms 26 may then we moved together again to reengage the lugs 31 within the member 33.

While I have shown and described the preferred embodiment of my invention it is of course to be understood that l reservethe right to make such changes in the form, construction, and arrangement of parts as will not depart from the spirit of the invention or the scope of the subjoined claims.

Having thus described my invention, 1 claim: I

1. In combination with an elevator shaft, an elevator slidable therein and a hoisting cable for the elevator a safety stop comprising bars extending across the shaft, arms carried by the elevator and normally urged to gether, a member disposed between and engaged by said arms, the cable being connected with said member, said arms being engageable with said bars upon excessive upward pulling of the elevator whereby to force said arms apart to release said cable attaching member, and bars disposed outwardly of said first named bars and engageable by said arms when said arms are moved outwardly.

2.111 combination with an elevator shaft, an elevator slidable therein and a hoisting cable for the elevator, a safety stop comprising bars extending across the shaft, arms carried by the elevator and normallynrged together, member disposed between and engaged by said arms, the cable being connected with said member, said arms being engageable with said bars upon excessive upwardpulling of the elevator whereby to force said arms apart to release said cable attaching member, bars disposed outwardly of said first named bars and engageable by said arms when said arms are moved out wardly, downwardly. extending arms nected with said first nameo arms and having ratchet teeth, and pa wls engaging said teeth whereby to hold said first named arms in spread position.

3. in combination with a shaft, an elevator movable therein, and a hoisting cable or moving the elevator, a pair of bars disosed in spaced relation and extending 1 cross the shaft, other bars spaced from said nrst named bars outwardly thereof, a member disposed above and connected with the elevator, curved arms pivotally connected with said member and normally springpressed toward each other, lugs on the confronting faces of said arms, a member con nected withthe cable and having its ends engaging said lugs whereby upon excessive upward moven ent of the elevator said arms will engage said first named-bars and be separated whereby to release said lugs from 11mm we said cable attaching member with said arms engaging over said second named bars, and means for holding said in spread position. V

In testimony whereof I afiix my signature.

GIUSTO BOGGH).

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