US840936A - Safety-elevator. - Google Patents

Description

No. 840,986. PATENTED JAN. s, 1907.

' J.HART.

SAFETY ELEVATOR.

APPLICATION FILED SEPT. 5. 1906.

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INVENTOI? WITNESSES hm elsifari m h WW6 ATTORNEYS rm: NORRIS PETERS co., WASHINGTON, v! c.

PATENTED JAN. 8, 1907.

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I ,//l/////////////A SAFETY ELEVATOR. APPLIGATION FILED SEPT. 5. 190a.

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JAMES HART, OF NEW ORLEANS, LOUISIANA, ASSIGNOR OF ONE-HALF TO EMILE GARNIER, OF NEW ORLEANS, LOUISIANA.

SAFETY-ELEVATOR.

Specification of Letters Patent.

Patented Jan. 8, 1907.

To all whom it-mcty concern:

Be it known that 1, JAMES HART, a citizen of the United States, and a resident of New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and Improved Safety-Elevator, of which the following is a full, clear, and exact description.

This invention relates to elevators or lifts; and the object of the mvention is to provide a safety device which w1ll operate automatically to prevent the cage or car from falling in case of breakage of the suspending-cable.

The invention consists in the construction and combination of parts to be more fully described hereinafter and particularly set forth in the claims.

Reference is to be had to the accompanying drawings, formin a part of this specification, in which simi ar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a vertical section taken through a building provided with an elevator constructed according to my invention. Fig. 2 is a vertical section taken on the line 2 2 of Fig. 3. Fig. 3 is a horizontal section taken on the line 3 3 of Fig. 2. Fig. 4 is a vertical cross-section on theline 4 4 of Fig. 2.

Referring more particularly to the parts, 1 1 represent vertical guides for the elevator cage or car 2. At its upper portion the car 2 is provided with a crossbar or cross-head 3, and at the sides of this bar side plates 4 are attached by suitable fastening devices 5, as indicated in Fig. 1. These side plates are provided with longitudinally-disposed slots 6, which operate as guides in a manner which will be described more fully hereinafter. The inner faces of the guides 1 are formed, respectively, with longitudinally disposed tongues 7, and these tongues fit into the longitudinal grooves formed in the side standards 8 of the cage, as shown very clearly in Fig. 1. Near the ends of the plates 4 transverse end plates 9 are provided which connect the side plates as shown most clearly in Fig. 3. As indicated in Fig. 3, the side plates 4 referred to above are provided in duplicate-that is, there are two of these side plates on each side of the central plane which connects the guides 1. Between these side plates I provide catches 10, which are four in number, as shown. These catches are disposed in pairs located on each side of each guide 1, so that there are four of them in all. Each pair of catches lies adjacent to the same guide as its members, connected by a transverse bolt 11. These bolts 11 extend through the slots 6, as indicated in Fig. 1, so that they afford means for assisting in guiding the catches 10 longitudinally and in an outward direction along the cross-head 3.

Between the pairs of side plates 4 above referred to I provide longitudinally-disposed strips 12 of wood or similar material, which are preferably of the same thickness as the catches 10. The catches fill the spaces between the adjacent edges of these strips 12, so that these strips operate as guides for the catches, as will be readily understood. The catches are retained in position by the side plates 4, which project beyond the edges thereof, as indicated most clearly in Fig. 4.

Each of the bolts 11 is connected with one of the end plates 9 by means of a helical spring 13, so that the catches 10 tend to force themselves outward. The outer ends of the catches are formed with noses 14, which project across the side faces of the guides 1, as indicated in Fig. 1, and the upper sides of these noses are formed with beveled edges 15, respectively.

On the side faces of the guides 1 I provide a plurality of outwardly-projecting stops or stop-pins 16. These pins lie in the path of the noses 14 of the guides 1 in such a way that they will strike against the inclined faces 15. Normally, however, the noses 14 do not project sufliciently so as to engage the pins. They are held in a withdrawn position by means of a keeper or saddle 16, which saddle consists of a plate having its ends bent downwardly to form fingers 17, and these fingers engage with stirrups 18, which are pivotally attached to the bolts 11, respectively, as indicated. This keeper 16 is normally held in engagement with the stirrups by means of a helical spring 19, which is attached to the under side of the keeper and to-the upper side of the cross-head 3.

The elevator cage or car is supported by a main cable 20, which 1s provided with branches 21, which pass through guideopenings in a guide-plate 22, and these branches have their ends attached to links 23, carried by a pair of oppositely-disposed members of the fastening devices 5. The guide-plate 22 is provided with an opening 24 through which passes a safety-cable 25, and the ex- I I ward through openings 29, formed in the cross-head 3'. At their lower extremities they are provided with rings 30. Evidently by pulling upon the rings 30 the stirrupsmay be pulled inwardly, so as to extend the spring 13-. These cords are useful in resetting the safety device of the elevator after it is operated.

The means of operation of the safety device will now be described: When the elevator is being raised or lowered, the cables 20 and 25 move together, so that there is no relative movement between them. If, however, the main cable 20 should break, the weight of the car comes upon the safety-cable 25. When this occurs, the member 16 is pulled upwardly and the spring 19 extended. If the finger 17 of the keeper becomes disengaged from the stirrups 18, then the springs 13 operate to forcethe catches 10 outwardly. In this way the noses of the guides are projected into the path of the stop-pins 16. They will then support the car upon the pins and will prevent the further descent of the car.

The beveled faces 15 are provided on the noses 14 in preference to upright or vertical faces for the reason that if the latter construction were adopted the ends of the catches might be obstructed in their outward movement by str1king against the pins. This form of nose for the catches is also desirable, as it admits of the elevator-car being raised after the safety device has been sprung without necessitating the catches being pulled inwardly by means of the cords 27.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In an elevator, in combination, guides having a plurality of stops disposedalong the length thereof, a car, catches slidably mounted on said car, means tending to force said catches outwardly to engage said steps, a keeper normally connected with said catches and holding the same in their withdrawn po sition, a spring normally holding said keeper in connection with said catches, a main cable supporting the said car, an auxiliary cable attached to said keeper and normally moving along the length thereof, a car sli at the same speed with said main cable, said auxiliary cable being adapted to extend said spring to release said catches.

2) An elevator, in combination, guides having a plurality of stops disposed along the length thereof, a car moving between said guides, catches slidably mounted in said car, springs tending to force said catches outward to engage said'stops, stirrups attached to the inner ends of said catches, a keeper having downwardly-projecting fingers engaging said stirrups and affording means for retaining said catches normally in a withdrawn posrtlon, a spring holding said keeper in engagement with said stirrups, a main cable supporting said car, and an auxiliary cable moving with said main cable and attached to said keeper.

3. An elevator, in combination, guides having a plurality of stopsdisposed along the length thereof, a car moving between said guides, catches slidably mounted in said car, springs tending to force said catchesoutward to engage said stops, stirrups attached to the inner ends of said catches, a keeper having downwardly-projecting fingers engaging said stirrups and afiording means for retaining said catches normally in a w1th-' drawn position, a sprin holding said keeper in engagement with sai stirrups, a main cable supporting thecar, an auxiliary cable moving with said main cable and attached to said keeper, and cords connected respectively with said catches and depending in. said car, said cords affording means for withdrawing said catches.

4. In an elevator, in combination, a pair of guides having a plurality of stops. disgosed ably mounted between said guides, catches slidably mounted in said car and having noses which may project so as to: engage said stops,

- springs tending to force said catches outward to engage said stops, stirrups pivotally j attached to the inner endsv of said catches, a ,keeper having downwardly-projecting fingers adapted to engage said stirrups, to hold said catches in a withdrawn osition, a spring 5 attached tosaid keeper and olding the same 1 in engagement with said stirrup, a main cable supporting said car, and a safety-cable running with said main cable and attached 1 to said keeper.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES HART.

' Witnesses:

WM. MOORE, JNo. GEO. WEBER.

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