US280419A - Safety attachment for elevators - Google Patents

Description

2 Sheets-Sheet 1.

(No Model.)

P. W. VOERDE.

SAFETY ATTACHMENT POP. ELBVATORS. No. 280,419.

Patented July 3, 1883.

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(No Model.)

P. W. VOERDE.

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UNITED STATES FREDERICK V. VOERDE,

PATENT EEICE.

or CHICAGO, ILLINoIs.

SAFETY ATTACHMENT FOR ELEVATOR`S`.`

SPECIFICATION forming part of .Letters Patent No. 280,419, dated J'uly 3, 1883 I Application filed April lS, 1893. (No model.)

To all whom it may concern,.-

1 Be it known that I, FREDERICK W. VCERDE, residing at Chicago, in the county of Cook and State of Illinois, and a citizen of the United States, have invented a new and useful Improvement in Safety Attachments for Elevators, of which the following is a full description, reference being had to the accompanying drawings, in which'- Figure 1 is a top view of the upper-framework of the elevator platform or cage, showy ing the arrangement of the four ropes or chains by which the platform or cage is hoisted,.the

springs in connection with lifting arms or levers, and also the vsprings in connection with the controlling arms or levers and eccentrics. Fig. 2 is a front view of the top of Iny improved elevator, showing the arrangement when two springs are used at. the ends of the shafts with the controlling arms or levers, or two springs with the lifting arms or levers at the center of shafts. Fig. 3 is a view of an adjustable screw connecting-bolt.- Fig. 3 is a view of the adjustable screw connecting-bolt in connection with cross-bars and springs. Fig. 4 is a side view of the hanging attachments in connection with hoisting-cable. Fig. 5 are detailed views of Fig. 4. Figs. 6, 7, and 8 are cross-views of Figs. l and 2, showing the position of the several parts of the controlling attachments when platform or cage is hoisted. Fig. 9 is a crossview showing the position of the several parts of the controlling attachments when the platform or cage is hoisted by a draw-pin. Fig. l0 is a part of a top view of Fig. 9.

This invention relates to safety attachments to be applied to elevators for the purposeof arresting or stopping the descent of the platform or cage in case of breakage of hoistingcable, or should the cable from any cause become slackened, in which case the descent of the cage will be arrested simultaneously, or

nearly so, with the breaking or slackening of the cable.

This object I accomplish-by the mechanism illustrated and hereinafter de- `scribed and claimed.

In the drawings, A represents the guide-rails or upright posts, central of the frame B B, which extends from the top to the bottom of the passage-way or shaft in which the elevator or cage travels. B represents the top of the frame-work of my improved elevator platform l ner to the sides of cross-bar B, as shown in Fig. 2, so as to bring the shafts b in proper position for the eccentrics c and guide-posts or uprights A.

I) are rods or shafts of uniform length, supported, as shown, by journals or boxes a, two being used, one on each side of the cross-bar 'B or guide A. To these shafts the inner ends of the lifting-levers d and controlling levers or arms h are attached in a suitable manner, to

cause them to rise and fall, and thus rockingv the rods or shafts to which they are attached. The outer ends of theshafts I), the inner ends of the lifting arms or levers d, and controlling levers 7L must be properly adjusted and firmly connected.

c are eccentrics secured onto each outer end of rods or shafts b, so as to bring an eccentric on each side of each guide-rail A, and in such position to the guide-rail as to be held clear thereof, or be brought in Contact therewith,

by rocking and holding the shafts b in proper position, as shown. These eccentrics have the edge or face which engages with the guide rails or posts serrated, for the purpose of producing a firmer and stronger bite or grip wh en they are brought into Contact with the guides or posts.

d are lifting arms or levers, (two being used, one on each side of the cross-bar B.) rlhey are of uniform length, and their inner sides are `keyed onto the shafts b, as shown. .Their opposite ends have a slot or hole, into 1which the.

chains, ropes, or hangers j are fastened.

'e is a plate or ring containing.loop-holes, into which arefastened four hangers, chains, or ropes, g, for the purpose of raising or .lowering the platform or cage in. connection with drawpin e.

e is a draw-pin, in which is pivoted an eye, into which the hoistingcable is securely attached.

c is a plate attached to draw-pin cf y below theplate'or ring e, in either end of which are IOO .Mi :xsane eyes or holes for the purpose of attaching hangers or ehainsf, as shown in Fig. 4.

c is a screw-nut attached to draw-pin c below the plate e, as shown in Figs. 2, 4, and 5, of sufficient strength to sustain the weight of the platform or cage when hoisted.

f are hangers or chains of equal length, one of which is used on each side of the crossbar B. Their upper ends are attached to plate e, and their opposite or lower ends are at tached to the outer ends of the lifting-arms d, for the purpose of lifting the same, as shown in Figs. l, 2, 6, 7, and S.

f, as shown in Figs. 9 and l0, are hangers used in connection with draw pin attached to plate f, and their opposite ends attached to the lifting arms or levers d, for the purpose of raising the outer ends of the lifting arms or levers d.

f, as shown in Figs. 9 and 10, represents a draw-pin passing through the center of the cross-bar, for the purpose of raising and low ering the platform oigeage.

f is a plate attached to the draw-pin f, in each end of which is an eye or hole, for the purpose of attaching the hangers j", as shown in Fig. 9.

g, as shown in Figs. l and 2, are chains or ropes of uniform length, four of which are used, their upper ends being fastened to plate or ring e, and their lower ends to the bracebar C at the point y', for the purpose of sustaining the cage or platform when hoisted.

g is the upper part of the brace-rods C, into which eyes are pivoted, for the purpose of fastening the lifting chains or ropes g, as shown in Figs. 1 and 2.

i are controlling levers or arms, (four being used, two on each side of cross-bar B, and for each rod or shaft 1), directly opposite to each other, and close to the journals or boxes c.) Their inner ends are securely fastened to the rods or shafts b, so as to have them rise and fall with the rocking ofthe shafts, in the same manner as the lifting arms or levers d. The free or outer ends of the arms or levers h have holes or slots, into which is hinged or fastened a coil or spiral spring,

fi are coil or spiral springs connecting the outer ends of controlling arms or levers h, which springs act in a compressible manner or direction, to draw the outer ends of the arms or levers l1 downward, when the hoisting-cable is broken or slackened, thereby impelling the eccentries against the guide-rails or upright posts A, in which case the springs will have regained their normal condition, or nearly so. lt is evident that one spring c' alone could be used, if .so desired, and would be sufficient to answer the purpose.

7c are springs used in the center of the crossbar or framework B, attached to or coiled around the rods or shafts b, as shown in Figs. l, 2, and 6, having their centers rest against the inner side of the lifting arms or levers d, and their ends attached or fastened to an adjustable screw connecting-bolt Z, or other suitable conneeting device. It is evident that spring 7c can be used at or near the ends of shafts b, in which c ase, instead of their being wound around the neck of the lifting-arms d, (or, where there are no lifting arms or levers, at the center of shafts, as described,) one end of the springs is fastened to the shafts by a collar or screw or othersuitable device, and the other and unsupported end secured by a suitable connecting device, as described. The spring k is used wherelthe construction of the cage or platform is such that it is not practi,A cable to use spring Z is a shell, into each end of which is screwed a screw-bolt, Z. The thread on screw-bolts Z', in connection with the bolt or shell l, should be in opposite directions, so that when the shell Z is turned each inner bolt l will travel in opposite directions, or toward each other, thereby lengthening or shortening the same. The shell Z and bolts Z comprise an adjustable screw `connecting-bolt, as shown in Fig. 3. The outer ends of screw-bolts l have an eye or hook, into which the unsupported ends of springs k are fastened. The office of this adjustable screw-bolt is to support the ends of springs k and to adjust their action or tension.

m, as shown in Figs. 8 and 9, is a ring, hook, or other device attached to the brace-bolt C, for the purpose of attaching the springs `i when the construction ofthe platform or cage is such that it is not practicable to use the springs in the manner shown in Figs. 1 and 7.

m, as shown in Fig. 3, are cross-bars, attached at their centers to the outer ends of thc adjustable screw-bolts Z. These bars have eyes or holes at their outer ends, to which are -attached the ends of springs k, for the purpose of supporting the ends of the springs and for regulating their actionv or tension. lVhen this device is used, only one of the screw connecting-bolts l is needed for each spring.

n, as shown in Fig. 9, is a head at thelower end of the draw-pinf, below the cross-bar B. This head may be a screw nut or nuts screwed onto the draw-pin for the purpose of holding or sustaining. the platform or cage when hoistA ed.

o, as shown in Figs. 9 and 10, is a loop-hole or eye pivoted through the upper end of drawpin f, to which the hoisting rope or cable is attached.

r represents the hoisting-cable.

The operation is as follows, (when spring fi is used:) Vhen the cable is taut, and the cagev or platform is hoisted by the chains or ropes y, the lifting chains or ropes f are simultaneously drawn upward, raising the lifting arms or levers d, and also the eontrollin g arms or levers 71 thereby rocking the shafts b and holding the eecentrics c clear of the uprights or guide-posts B, and the cage or platform will be free to ascend and descend without interference from the eecentrics; but if the hoisting-cable breaks, or from any cause becomes slaekened, the springs fi will force the outer ends of the controlling levers or arms h, as well IOO IIO

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the lifting chains or ropes f are simultaneously drawn upward, raising the lifting arms or lev vers d, thereby rocking the shafts b and holding the eccentrics c clear of the uprights or guide-posts B, and the cage or platform will be free to ascend and descend without interference from the eccentrics; but if the hoistingcable breaks or from any cause becomes slackened, the springs k will force the lifting arms or `levers d downward, thereby rocking the shafts b, and throwing the leccentrics c against theuprights or guide-posts'A, and arresting the descent of the platform or cage instantaneously, or nearly so. When a draw-pin is used in connection with the hoisting-cable, as shown in Figs. 9 and l0, the operation of the springs a or k, in combination with the arms or levers,

shafts, and eccentrics, will be the same as heretofore described.

What I claim as new, and desire to secure by Letters Patent, is-

1. An adjustable connecting screw-bolt, l in combination with spring k, levers or arms d, shafts b, and eccentrics c, substantially as and for the purpose described. l

2LAn adjustable connecting screwbolt, I, with bars on attached, as and for the purpose described. I

3. An adjustable connecting screw-bolt, Z, with bars m attached, in combination with spring k, levers or arms d, shafts b, and eccentrics c, as and for the purpose described.

4. Spring z' and lever h, in combination with shafts b and eccentrics c, as andy for the purpose described.

In testimony of which invention I hereto set -my hand.

FREDERICK W. VOERDE.

Attest:

L. A. TALCOTT, D. .HARRY HAUsMER.

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