USRE1277E - Improvement in molds for molding cement pipes - Google Patents

Description

j UNITED STATES PATENT OFFICE.

IIENEY KNIGHT, or JERSEY CITY,

NEW JERSEY.

Specification forming part of Letters Patent No. 28,184, dated May 8, 1860; Rcissue'No. l,271,dated To allwhom it may concern:

Be it knowgn that I, HENRY KNIGHT, of,

Jersey City, in thec'ounty of Hudson and State of New J ersey,haveinvented a new and luseful Improvement in Means for Manufacturing Hydraulic-Cement Ii pes; and I do hereby de claire that the following is a full, clear, and exact description of the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l4 is a perspective view of the whole apparatus, excepting the detachable collar.` Fig. 2 is a perspective view of the detachable collar. Fig. 3 is a perspective view of the detachablebaseplate of the mold. Fig. 4is a vertical central section of Fig. l, and Fig. 5 a horizontal section of the same..l Fig. 6 is a "crtical section of the frame, showing the core in elevation with the mold around it. This section is taken at right angles to Fig. 4. Fig. 7 is a ver-tical central section of the whole apparatus with a section of cement pipe molded in it. This section is also taken at right ang-les to Fig. 4. Fig. Sis a longitudinal section of two pieces of pipe,4

I produced by my improved means, jointed together.

Similar letters of reference in each of the several gures indicate corresponding parts.

The leading idea of my invention is the production of externally-collated and internallysquare-shouldered hydraulic-cement pipe by molding vertically in metallic or other molds or flasks which are not built up at each operation of molding a-section of pipe.

' As practice has demonstrated that hydraulic-cement pi pe answers a. better purpose .for underground drainage thanv metal or burntclay pipe, because it is free from liability to rust and is In uch cheaper than metal pipe and stron ger and cheaper than even burn tclay pipe, and .also because it allows of branch co11- nections being readily formed without danger of damaging the mann my linvention is. of great utility, inasmuchas it enables me to furnish the market with a perfect substitute for the most approved style of metal pipe at small cost.

As improvements inA means for manufacturing hydrauliecement .pipe by vertical'molding, the nature of my invention consists, first, in the use of a stationary vertical core, ,or

removed from its equivalent, projecting up from the bast. of the machine, from which the cementpipe i raised, substantially as hereinafter described; second, in the combination ot' the detachable collar, or its equivalent, and a iiask or exterior mold, constructed with two different diametersand with a horizontal or nearly horizontal shoulder, for the purpose of forming the vertically-molded cement pipe with an extending collar; thi-rd, in the use lof the shouldered de.

tacliable base or bottom plate, or its equivalent, with lifting loops or eyes on its upper side; fourth, in the use of va detachable col lar, or equivalent tool, for forming a rightangle or nearlyright-angle socket within the collar portion of the vertically-molded pipe;

fifth, in the use of an adjustable centering and cement-supporting table, inycombinatiouwith production by vertical molding, with means substantially such as hereinafter described, of sections of cement pipewith external collarswhich have rightangle or nearly rightangle sockets within them; seventh, in removing the'molded pipe'from raisiny it vertically. Y

To enable others skilled -in the art to make and use my invention, [will proceed to describe the same withinreference to the drawings.

A represents a platform on which the mold or molds are arranged. B is a central bar bolted firmly to the platform 'and projecting' upward with a slight taper some three feet (more or less) from the same. This bar is designed as the core to the mold F, but it also serves for thefdetachable collar Gr, or its equivalent, to t and move upon when said collar is arranged in position for forming a ri ght-an gle or nearly rightangle socket within the collar portion of a cement pipe.

' E is a base or bottom to disconnectliblefrom the mold. vlhrongh its center a circular hole, E', is cut, and from its top two or more lifting handles or loops, b b,l project upward, and also a ring-bead, c. In stead ofthe ring-bead, a groove of about half an inch depth may be cut in the plate.

O is a hinged adjustable table, withl a circu` lar hole, U', through its center.

is a part of the frame 1) ofthe machine, and its oice is twofold-viz., to center the mold the machine by the mold F. It is This table i and to. support'the cement which is being introduced into the same. It is hinged so that it may be thrown up out of the way when the mold, with cement pi Agether through the aid of straps t t and wed gev staples u u: vThe mold at one end is made with anincreased diameter, as shown at d e,A and at the termination of the portion F a horizontal or ,nearly horizontal shoulder, f, ex tends outward and unites the portion d e with the portion F, as shown. -The enlarged portion serves for forming au extending or projecting col-lar on one end'of the cement pipe.

The removable tool G, for forming the rightangle or nearly-right angle socket within the collar -of the pipe is of ring form, and has a handle, g, extending up from` its top. e To adjust` machine lfor making pipe with collars and right-anglesockets or shoulders, the hinged table is rst thrown up and back to the position shown in red outlines. The

ybase or bottom E of the mold isnext slipped over the central bar; B, and made to iind its rest on the base-iiange thereof. Then the mold F is adjusted around .the bar B and within the circular bead C.y The hinged table is -now brought down around the Vlargest endv of the i mold, so as to center it and to serve for supporting the cement, as illustrated in black outlines. All the parts, excepting the collar G, being adjusted as shown in Figs. 1 and. 4,

the cement .is placed upon the hinged table C, and therefrom is gradually lforced into the mold and rammed compactly until the mold is lled to within a short distance of its top or ofthe terminus of the collar portion. At this stage the tool G is fitted on or around the central bar, B, and forced down by vertical and circular pressure into the cementuntil' its upper surface'comes even with upper termini of the bar B and mold F. 'lhisjbeing done, 1 force and ram additional cement between the 'circumference of -the'tool G,and the enlarged part of the mold until the cement rises level with the terminusvof the mold,when with a trowel or otherimplement any surplus cement -i'sA struck off, the striking-tool being' heldin the hand or centered on the top of the center bar,B. The molding of the pipe is'now completed, and as soon as the cement 4becomes f seta-I proceedas'follcws'fto'remove the'pipe "from the mold:

The hinged table C is first thrown up tothe position shown in red. The c'ollarl or tool G is then withdrawn by first gently ,turning 'it slightly so as to loosen itl, and then drawing -it upward. The mold with the pipein it, is net raised by elevating the `base-plate, on whichit rests,by its handles. until it clears the top of the :central bar, B. The base-plate,

witlimold'and pipe connected to it, is setupon the oor, and the mold, with pipe in it, is lifted until it frees itself from the base-plate. The base of the mold is now allowed to rest on the floor, and the fastenings which lock the two parts of the mold together are gently withdrawn, and While gently tapping the upper portion of the mold the sections or two parts are separated laterally, and the pipe left standmake'a pipe with ends or corners perfectly .whole orl unbroken, for the base-plate enables l.the central bar, it supporting the cement pipe until and after it is clear of thex top of said bar. Without the aid of the base-plate with Vcircular bead, or its equivalent, a groove, and lifting, handles, it would be necessary, as usual, to draw the core from the mold, and in doing this the endsA or cornerswf the pipe are very frequently broken 0E, and difficulty consequently attends the formation 'of av perfectlytight line of drain-pipes. I also am -enabled to form sockets with right-angle or' nearly right-angle shoulders in one eud'of each section of pipe,jand thus make a more perfect,. close, and permanent joint than is obtained with the male and female bevels formed on thezends of the hydraulic-cement pipes in use. What I claim as an improvement in mea-ns or method of manufacturing hydraulic-cement pipe by vertical molding, and desire to secure as my invention by Letters Patent, is--' 4 1. The use of a vertical stationary central for the purpose set forth. 2. The combination of t purposes set forth.

4. The use of a detachable collar or ltool, G,

the cement pipe, substantially as and for the purposes set forth. l j A y I 5. The. use of an adjustable perforated centering-table, in combination with a 'cementpipe machine, substantially as and for the purposes set forth. I

6. Producing byivertical moldin g,with means substantially such ,as described, sections .of

HENRY KNiGtrr.

vWitnesses:v i l DENNIS FARBELL, JAMES ,(lrnwrorm.

ing on its smallest end. Thus operating, If

me to draw the mold, with the pipe in it, over l core, or its equivalent, substantially as and g he detachable collar' G, or its equivalent, and a 'flask or exterior*V mold, F d e, constructed with two different base or bottom E, substantially as and for the or its equivalent, for forming a rightangle or nearly right-anglesocket within one end of cement pipewth'e-x'trnal"collars and 'right-y l

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