US113374A - Improvement in coffer-dams - Google Patents

Description

aient attire,

JOHN E. WALSH, OF NEW YORK, N. Y@

' Letters Patent No. 113,374, dated April 4, 1871.

IMPROVEMENT IN COFFER-DAMS.

The .teheule referred to in these Letters Patent and making part of the same.

I, J OHN E. WALsH, of the city, county, and State of New York, have invented certain Improvements in Coffer-Dams, of which the following is a specification;

As coder-dams are generally constructed they are only intended to be used as arneans of'proteeting workmen and their work from the presence of water or mudin building piersor abutments-ef masonry, and wholly surrounding the m-asonry to be 4built within them.

'lhe object of this invention is to so construct a coifer-dam as that a continuouswall of masonry may be built, and the coiffer-dam moved along in advance of the wall as it is built, and afford all the necessary or needed protection that the ord'inary cofi'er-dam could while masonry is being built withint it; and

It consists in the construction of the wallsof the dam so that after one section of what is to be a continuous wall is built within the coffer-dam, the dam can then be moved forward in the line at which the wall is to be built, and by devices bc clamped fast to the wall that is completed so that another section of wall of the length of the inside of the dam can be built and joined upon that iirst collstructed.

In the drawing- Figure l is a top view of the coder-darn with a section of a wall built inside ot' it;

Figure 2 is a side view of the dam and Figure 3 is a top view of the dam and section of a wall after the dam has becnadvaneed for building a second section ofthe wall.

ln the construction oi' the eoffer-dam the side wallsV and forward end, and thc'dcvices for holding the dam in its position, are the ,same as shown in a patent granted to me, numbered 111,157; and the improvements to be described relate to the construction of the rear wall of vthe dam, and its adaptability to be attached to the wall when built.

A represent-s the curved side walls of the dam, which may be of any required length or height;v

B- is the .rear or back end wall, extending from each side toward the center, of 4the width of the dam, lbut leaving a space, O, in the center a little wider than the wall to be built is thick, and, for the purpose of greater strength, is made double and with compartmentsB'.

At the inner sides of the two Ainner compartments theA inner wall-plate C, on each side of the center, turns a right angle and forms the inside wallstofthe two interior compartments next the open Vspace O, and extends back and in the rear of the wall B so as to forn a iiange, G, of sufeient width to be clamped against the wall when necessary.

To the cxtreme back-edge of ang'es O' are hinged curved doors a, and at the junction of the doors with the flanges, and attached .to the doors, are angle-plates c, with packing d interposed betweenvthe plate and door and between -the plate and flange-plate C', so that, when the doors are closed against the packing c between them, at' their extreme rear ends, and bolted together, as seen 'in fig. 1, all the joints will be watertight in the same manner byangle-plates and packing;

The compartments B may or may not have bottoms,

v'as fancy orwant may dictate.

'lhc doors'a, at the rear end oi' thc dam, are hinged insuch way that they canbe raised off of their hinges and be detached from the flangea. Y

The operation of building aA wall by the use of this coffer-dam is as follows: i

The Cotter-dam, as seen in iig. l, is taken-to the precise spot where the wall is to be built, sunk, and secured in itsposition in the usual way, the water pumped out and the foundation prepared; then the wall D is built, as seen in said iig. 1,thc entire length of the inside of the dam; this d'one, the doors a. are removed from the flangesV G. The co`er-dam is then moved forward and planted, as seen in iig. 3with the forward end of the wall between the flanges C'.

As the wall D is being built there are anchored and built in thewall ymetal eyes or staples E, and extending the proper distance from each side oi' the wall and at a suitable distance from the forward end of said l wall, as seen in iig, v1 to receive the bottoni ends of the clamp-piles F.

Between the iianges C and the wall D is placed a thick packing-sheet, d, when the 'clamp-piles F are forced at their bottom or lower ends into the eyes or staples E, brought toward each other at their top ends, and bearing hard against the iianges 1U their entire length, when theel-amp f, having the two eyes, is placed around them, and securely holds the cutter-dam water-tight `upon the wall, when the water is again taken out of the dam and the wail can be extended the length of the inside of the dam, and so continue the successive changes until the desired length of wall` is completed., Curved, or walls with angles, can be built with this construction of dam as well as straight ones.

The double walls B being hinged -to the side walls, they 'ca-u be, when necessary, opened, which will allow ot' the successful turning ot the dam where angles or curves are built in the wa1l,.and may facilitate the handling and moving the dam at other times.

Such 'construction oi' coffer-dam haslong been needed, and will be a valuable acquisition wherever Vsea or continuous walls are to be built.

Having described my invention, l

`Wlmt I claim, and desire to secure by Letters Patent, is- 1 l. The @offer-dam herein described', having a, double wail, B, at its rear end, with openingr O, nnges C', and removable doors a, constructed and arranged in the manner and for tire purpose set forth.

2. The flanges Of of the cofer-dnm herein' described,4

'in combination with the interposed packing d, metal eyes or stnpies E, clamppiles F, and chimp f.' constructed and arranged in the manner :md for the pnr pose described.

JOHN E. WALSH. Witnesses:

WILLIAM A..HOYT, GEO. A. BLACK.

Images