US593947A

US593947A - Air-lock for caissons

Info

Publication number: US593947A
Authority: US
Publication date: 1897-11-16
Anticipated expiration: 1914-11-16

Description

2 Sheets- Sheet 1 S. MATTSON. AIR LOCK FOR CAISSONS.

Patented Nov. 16, 1897.

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S. MATTSON.

AIR LOGK FOR GAISSONS.

Patented Nov. 16, 1897.

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UNITED STATES y PATENT GFFIOE.

SAMUEL MATrsON, or BROOKLYN, NEW YORK.

AIR-LOCK FOR CAISSONS.

SPECIFICATJDN forming part of Letters Patent No. 593,947, dated November 16, 189'?. Application iiled February 9, 1897. Serial No. 622,699. (No model.)

To @ZZ whom, it may concern/.- f p Be it known that I, SAMUEL MATTSON, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Air-Locks for Caisi sons; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention contemplates certain new and useful improvements in air-locks forl caissons.

In certain sections of the country there has of late been a great demand for deep foundations in the erection of tall buildings in order to provide for numerous small piers. An ordinary caisson is large and very expensive and costly in operation. I have found by actual practice that simple and economical means are required for excavating the soil and putting in concrete bedding and for allowing of the ready ingress and egress of workmen' without at the same time consuming much space.

It is the object of my invention to provide an air-lock possessing all the requirements of the present demands, as above outlined.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims. I

In the accompanying drawings, Figure l is a vertical sectional view of an air-lock constructed in accordance with my invention. Fig. 2 is a plan view. Fig. 3 is a cross-sectional view on line 3 3, Fig. l. Fig. 4t is a sectional view of an auxiliary element. Fig. 5 is a detached View of a slight modification.

Referring to the drawings, A designates a cylindrical shaft, to the upper end of which is secured an enlarged cylindrical section or casing ct, in the top and bottom of which latter are opposite Openings a" and a2, concentric withcylinder A. The top opening d is closed by a detachable cover B, through a stuffingbox b in the center of which is passed the hoisting-rope b/ of a bucket. (Not shown.) For the bottom opening a2 a downwardlyopening gate b2 is provided.' After a bucket is raised into casing a the gate b2, which had previously been open, is closed.

C is a wheel mounted in' the upper end of hand holes.

an arm or bracket d,.which swivels on the hoisting-rope.

Vl) is a sliding door suspended by two arms e from rail-flange e' on the interior of the casing 0 said arms having rollers e2 movable on said iiange. This door is designed to cover an openin g e3 in the cylindrical casing,throu gh which the workmen enter and leave the casing. It is normally held firm to its seat over and inclosingsaid opening by the pressure within the cylinder. By mounting this door so that it can slide back and forth over and away from the opening economy in space is provided and the door forms no obstruction, as it would if it opened inward.

In order to provide for the ascent and descent of the workmen in shaft A, I may form in one side of thelatter a series of spacedapart slots or openings f, forming foot and these slots or openings, is secured a curved or bowed plate or casing F to prevent air from escaping by reason of the formation of these slots or openings. It will be noted that the ladder thus formed in no way constitutes any projection or obstruction in the shaft or line of passage of the bucket. However, other means may be employed for ascending and descending in the shaft.

G is an inclined chute extending through one side of the casing d. Its inner upper end is provided with a removable cover g, which is normally held down to its seat over the end of the chute by the confined air-pressure Within the casing. At the lower end of the chute is a gate g', which is shown in Fig. l as consisting of a solid body movable vertically and capable of being elevated out of the way into an elongated extension g2 by means of a lever g3 and chain g4', the former being fulcrumed to the outside of the casing. An air-pipe g opens into the chute in line with the lower end thereof, longitudinally of the seat of the gate g', its object being to force away any dirt from said seat. A second air-pipe g5 opens into the chute near the upper end thereof for the purpose of ejecting dirt from the bottom of the chute. In Fig. 5 I have shown this IOO . the chute.

outer gate as being hinged or pivoted at its upper end,- as at g. In this form a yoke 97, held to the gate by studs g8, has hooked ends gwfor en gagin g hooks glattached to opposite sides of the chute. The gate lits against a rubber disk Q13 and is capable of adjustment, so as to insure a iirm seat, by a screw gm, car; ried by the yoke.

In practice when the hoisting-bucket has been raised into the casing and the cover g of the chute is removed, the gates b2 and g being first closed, the contents of the bucket are emptied into said chute, and after the replacement of said cover the gate g is elevated, allowing the excavated soil, &c., to fall from Thus it will be seen that the emptying of the bucket is accomplished within the casing and without necessitating the passage of a workman from the lock. In supplying concrete the cover B is removed and a cylindrical receptacle His substituted. (See Fig. 4.) This receptacle extends down into the casing and is provided with upper and lower gates h and 7L. lVhen the lower gate is closed, the upper gate can be opened and the receptacle supplied with concrete, after which the upper gate is closed and the lower opened to permit the concret-e to pass down into the casing.

The advantages of my invention are apparent from the foregoing. It will be seen that I have provided simple and highly-efficient means for accomplishing all the objects hereinbefore mentioned.

It is apparent to those skilled in the art that an air-lock constructed as herein described is inexpensive and durable and not liable to readily get out of order.

Iv 'claim as my invention- 1. An air-lock for caissons having an opening in its top, and a wheel having a support pivotally mounted concentric to said opening, as and for the purpose set forth.

2. An air-lock for caissons having an opening in its top, a stuffing-box fitted in said opening, and a wheel having a support pivotally mounted concentric to said stuffing-box, as and for the purpose stated.

3. An air-lock for caissons having an opening in its top,a stuffing-box fitted in said opening, a wheel, and an arm or bracket therefor pivotally held at its lower end so as to be free to move concentrically to said stuffing-box, substantially as set forth.

4. In an air-lock for caissons having an upper casing, an inclined chute leading from said casing having closures for its ends, and

an air-pipe opening on line with the bottom of said chute at or near its upper end, substantially as set forth. y

5. In an air-lock for caissons having an upper casing, a chute leading therefrom, a gate at the outer end of said chute, and an airpipe opening into said chute so as to eject air over the lower seat of said gate, substantially as set forth.

6. In an air-lock for caissons having a casing, a chute leading therefrom having at its lower end an upper extension, a verticallymovable gate at the lower end of said chute, a lever and a chain connecting the latter to said gate, substantially as set forth.

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

SAMUEL MA'ITSON.

IVitnesses:

CH. LI'NDAU, RICHARD PIKE.