USRE5494E - Offige - Google Patents

Description

M. TEPHENS.

Improvement in Devices for 'Lining Cement Pipes.

N0. 5,494. Reissued1u.ly15,l873.

MELVN STEPHENS, OF BRKLYN, NEW`YRK.

lmenorsreesr an oei-faces' son usine essere? eiPEs.

Speciiication forming part of Letters Patent No. 126,100., dated April 23, 1872; reissue No. 5,494, dated July 15, 1873; application tiled J une 5, 1673.

iron lined with hydraulic cemenabut in appl ring the lining considerable diflicnltyhas been experienced in consequence oi' the plastic cement settling down before it has become consolidated or set; hence the lining haste be rendered uniform by cuttingthe surplus ed' at the lower end and adding cement te the upper end; and this operation has to be done by hand and adds to the cost, besides which the pipe is not perfect; In many instances the cement does not adhereA to the iron and falls ldown in mass. This is particularly the case with large-sized pipes. The usual way of making the cement pipe is to spread the plastic` cement upon the inside of sheet-metal pipe by means of a conical` form that is drawn through the metal pipe. A core that is sometimes slightly conical has been employed to sustain the cement While bein g introduced and, tamped, and when the cement is partially set the core is rotated, shaken,n and Worked snih.- cient to loosen it, and then it is withdrawn. l make use of a contractible cyiinder that is introduced to sustain the plastic mass until it sets sutiiciently to be sel'llsupporting, and this cylinder is contracted to separate it from the cement previous to its being` Withdrawn.

In the drawing, Figure l is a `vertical sec-l tion of the cone, cylinder, and pipe as the same is being made. Fig. 2 is a sectional plan at the line :v :v of the contractible cylinder.

The metal pipe c is to be lined with a layer of cement, b. To effect, this the conical spreader c is drawn up through the tube c, and the cement resting thereon is spread upon the interior of the tube c. There are guide- Afins c' to maintain uniformity in the lining that is applied to the pipe. These parts are known and are not claimed. The contractiblc cylinder e is made of metal, in one or more pieces, and the edges lap or come in contact.

The cylinder is represented with toggle-joint bars @i that are attached at their ends o o, and the separe-te pairs of bars are connected one to the other by the longitudinal bar It, so that the togglescan be operated simultaneously to contract or expand the cylinder e. lt is to be understood that two or more of these pairs of toggle-bars may ce employed, according to the length ci' the pipe; and the tube or cylinder e is made of more than one piece the toggle can be applied at each joint in such cylinder, so as to contract the cylinder c at more than. one place in its circumference. rhis ccntractibie cylinder c is to be inserted into the metal tube to support the cement in contact with such tube ce while the cement is soft and plastic, and previous to and during the consolidation or setting of the cement, and to facilitate this operation the cyliudere should be introduced Within the cylindrical flange 2 of the cone c, and united by the bayonetlocks e' or other suitable device so as to be drawn into the pipe by the cone in its movement, and after the lining has been spread the cone is to be disconnected from the cylinder e and removed for use elsewhere, while the cylinder e remains to support the cement until it sets or hardens sutciently. The cie-ment may be pressed into the space by a ringplun ger it' desiredim'lbe cylinder e may be expanded by the toggles at theA time it is drawn into the pipe by the cone, or it may be'expanded after it is in place, so as to more fully consolidate the cement, and after the cement has set or hardened sufficiently the cylinder is contract ed for loosening the same from the cement to allow of its removal Without injury to the pipe. The cylinder e might be employed in cases Where the plastic cement is introduced into the space between the pipe c and cylinder e.

I dov not claim a sectional core and a mold in which a cement, sewer, or drain pipe is made, as` in this case the pipe is taken from the mold and the core removed before the cement sets orhardens, the object being to prevent the cement adhering to the mold.

In my improvement the contractible core is employed to insure adhesion between the sheet* iron pipe and its coment lining, and thereby make a superior pipe for strength and durability. I clailn as my invention- 1. The manufacture of cement-lined metal v p1pe,by ineans of a. contraotible cylindrical `core that retains the coment lining lirmly in contact with the pipe until the cement has* consolidated, after which the core is removed,

substantial;r as setforth. 1

2. The cylinder e, with the toggles connected to the inside` thereof, for expandingand sustaining the cylinder, and for contracting thel same previous to lremoval, substantially asset fort-h. A

3. The contractible cylinder e, connected removably to the conical spreader, substantially as and for the purposes sct'forth.

Signed by me this 3d day of June, 1873.

' K MELVIN STEPHENS.

Witnesses:

GEO. T. PINCKNEY, CEAS. H. SMITH.

Images