US1152318A - Landing-chair for elevators. - Google Patents

Description

JI'M. HOWARTH.

LANDING CHAIR FOR ELEVATORS.

APPLICATION FILED JULY 17. 1914.

1,152,318, PatentedAug. 31,1915.

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J. M. HOWARTH.

LANDING CHAIR FOR ELEVATORS.

APPLICATION FILED JULY \7, 1914.

Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

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JOHN M. HOWARTH, 0F WAlTSAU, WISCONSIN, ASSIGNOR OF ONE-FOURTH T0 FRANK C.

DANIELS, OF'WAUSAU, WISCONSIN. l

LANDING-CHAIR FOR ELEVATORS.

Specification of Letters Patent.

Patented Aug. 31, 1915.

To all whom it may concern.

Be it known that 1, JOHN M. HowARrri, a citizen of the United States, residing at VVausau, in the county of Marathon and State of Wisconsin, have invented certain new and useful Improvements in Landing- Chairs for Elevators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

Thepresent invention relates to landing chairs for elevators, and has for an object to provide an improved landing chair for securing the elevator platform against accidental displacement when at rest at a landing.

It is an object of the present invention to provide an improved landing chair for elevator platforms which will insure the platform being brought to rest in precise alinement, so as to thereby forma smooth joint between the platform passage thereover of trucks," carriages or other vehicles employed in the transportation of merchandise and the like.

It is a further object of the present invention to provide improvements in landing chairs for elevators which will form a stop upon which the elevator operator may bring the platform to rest without having to eX- ercise any undue care in endeavoring to bring the with the landing.

With these and other objects in viewtne invention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claims.

In the accompanying drawings forming a part of this application, and in which similar reference symbols indicate corresponding parts in the several views: Figure 1 is an elevational view of an elevator illustrating cooperating landing latches constructed in accordance with the present invention. Fig.2 is a top plan view of an elevator platform and cooperating latch actuating mechanism, with the latches removed; and

and landing forv the platform to a stop precisely level Fig. 3 is a bottom plan view of one of the latches constructed in accordance with the present invention. eferring more particularly to the drawing, 1 designates a piston of the usual steam hydraulic or other suitable type of elevator, and supporting a platform 2 in the usual manner. The platform 2 is operable through the piston 1, by means of the cable 8 connected to the valvelever 4L, and operated in a manner as will be understood.

The valve lever 42 is connected by a rod 5 to an arm 6 mounted on one of a pair of rock shafts 7, journaled in brackets. 8 secured to the building structure. The rock shaft 7 to which the arm 6 is connected is provided with a stub arm 9 depending therefrom, thesame being connected by a link 10 to an upstanding arm 11 on the companion rock shaft 7. It will be understood by the arrangement above described that, upon actuation of the valve lever 4:, through the cable 8, tooperate theelevator, the rod 5, through the instrumentality of the arm 6, will actuate the associated rock shaft 7, from which latter a similar movement will be communicated to the companion shaft 7 through the stub arms and connecting link 10.

Eachrock shaft 7 is provided with a plurality of strikers 12, projecting substantially horizontally from the shafts and arranged to engage the lower arcuate ends 13 of bent levers 14-, fulcrumed each in a pair of depending ears 15 projecting from casings l6 bolted to the underside of the landings, as shown.v The bent levers 14 are' formed at their upper ends: with spherical heads 17, arranged to occupy sockets 18 produced in latches 19 mounted for reciproeating movement in casings 16. The casings 16 are further provided in the bottom walls thereof with elongated slots 20, for permitting of the oscillating movement of the bent levers 14: suflicient to move the latches 19 into and out of the casings, as will be hereinafter more particularly referred to. The latches 19 are connected at their rear ends with rods 21, arranged to slide in bearings 22 dependent from the gage correspondingly inclined surfaces 26' on longitudinal flange 27 formed at each underside of the landings. The rods 21 form, with the latches 19, shoulders 23, between which and the bearings 22 are confined coil springs 24, the same encircling the rods 21.

The latches .19 are arranged to be-normally projected into the elevator shaft beyond-the landing and in the path of the elevator platform. 1 In this position the upper outerfedges of the latches are preferably slightly inclined, as indicated at 25, to enedge of the elevator platform. The elevator platform 2 is provided with recesses 28 provided with inclined rear walls 29, arranged in alinement with the several latches 19, and during upward traverse of the elevator platform the inclined walls 29 are adapted to encounter the beveled undersides 30 of the latch ends to force the same inwardly against the action of the coil springs 2th and permit the passage of the elevator.

form 2 to be at rest, as illustrated in Fig. 1, inorderto descend the operator pulls upon the cable 3, in the-usual manner, to move the valve lever 4, which simultaneously draws down upon the rod 5 and connecting arm 6, and therebycauses actuation of the rock, shafts 7 Such action moves the strikers 1.2 to engage the arcuate ends 13 of the bent levers 14, and oscillate the latter about their fulcrums to retract the latches 19 within the casings 16 and'out of engagement with the-flange 27 on the platform 2, so as to permit the same to descend in the usual manner. After the passage of the platform 2, the latches 19, inasmuch as permitted by the relative positions of the strikers 12 and levers 14, will be projected again into normal position under the influence of i the springs. 245.

Durm'g ascent the inclined walls 29 of the recesses 28 will encounter the beveled portions 30 ofthe several latches 19,-and thereby move the same inwardly and permit the passage of the platform.

[tis to be understood that while I have illustrated the mechanism for a single'landing,the same may be provided for any numbar of landings and operate from the valve lever 4 by mechanism similar to that herein shown and described.

It is obvious that those skilled in the art may vary the details of construction and arrangement of parts without departing from the spirit of my invention, and therefore I do not wish to be limited to such features except as may be required by the claims.

I claim: k i 1. The combination with an elevator and operating means therefor, of latches mounted on the landing and arranged to project into the elevator shaft and form a support tions arranged between said rock shafts and latches for engaging and operating to retract the latter against the infiuence of said first-named means during descent of the elevator platform, substantially as described.

2. The combination of an elevator and operating means therefor, of latches mounted on the landing and arranged to project into the elevator shaft and form a support for the platform, levers associated with said latches, rock shafts, connections for actuating said rock shafts from the elevator operating means, and means on said rock shafts for engaging and operating said levers to re- Tn practice, assuming the elevator plattractsaid latches, substantially as described.

3. The combination of an. elevator and operating means therefor, of latches mounted on the landing and arranged to project into the elevator shaft and form a support for the platform, spring means for normally holding said latches in projected position, rock shafts, connections between said rock shafts and the elevator operating means, and means arranged between said rock shafts and latches for retracting the latter during descent of the elevator platform, substantially as described.

a. The combination of an elevator and operating means therefor, of latches mounted on the landing and arranged to project into the elevator shaft and form a support for the platform, levers associated with said latches, 1. ock shafts, strikers projecting from said rock shafts and arranged to engage and move said levers to retract the latches, and means for actuating said rock shafts from the elevator operating means, substantially as described.

5. The combination of an elevator and operating means therefor, of latches mounted in the landing arranged to project into the elevator shaftand form a support for the platform, levers associated with said latches, a pair of rock shafts journaled to either side of the elevator shaft, means for connecting said rock shafts to move together, connections for actuating said rock shafts from the elevator operating means, and connections between said rock shafts and levers for engaging and moving the latter to retract the latches, substantially as described.

6. The combination of an elevator and operating means therefor, of latches mounted to reciprocate in the landing and arranged to project into the elevator shaft and form a support for the platform, spring means arranged to normally hold said latches in projected position, levers associated with said latches, a pair of rock shafts journaled to either side of the elevator shaft, means for connecting said rock shafts to move in unison, connections between one of said rock shafts and the elevator operating means, and strikers on said rock shaft adapted to engage and move said levers to retract the latches, substantially as described.

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

JOHN M. HOWARTH. Witnesses:

F. (J. DANmLs, L. WENDORF.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0'.

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