US695594A - Conduit. - Google Patents

Description

No. 695,594. Patented Mar. I8, |1902.

V; H.'YARNALL.

CONDUIT.

(Application med Dee.' 1o; 1901.)

(No Model.)

TNE Nonnls Firms oo.. PHoTauma. wAsHjNGYoN. D. c.

' -4 UNITED STATES PATENT OFFICE.

VERNON H. YARNALL, OE NEW YORK, N. Y.

CONDUlT.

SPECIFICATION forming part of Letters Patent No. 695,594, dated March 18, 1902.

Application led December 10, 1901. Serial No. 85,341. (No modelo To all whom t may concern:

Be it known that I, VERNON H. YARNALL, a citizen of the United States, residing in the borough of Manhattan, city of New York, State of New York, have invented a certain new and usefullmprovement in Conduits, of which the following is a description.

The object of my invention is to produce a clay conduit for electric conductors which will afford a better protection for the cables, the sections of which conduit can be maintained in alinement and which will also be well adapted for the junction of conduits of a greater and less number 'of Vducts and at different angles,while preserving the substantial continuity of the surfaces of the ducts at the joints of the sections.

In the aecompanyingdrawings, Figure 1 is a perspective view showing one end of a fourduct conduit-sectionwith one of the aliningkeys in position. Fig. 2 is a side elevation showing the joining of two two-duct conduits with a four-duct conduit and thechanging of the angle of one of the smaller conduits, the ends of the conduits being shown cut Off at an angle to illustrate the partitions. Fig. 3 is an edge view of oneof the aliniug-keys.

Figs. 4, 5, and 6 are end views of conduit-sec# tions having, respectively, two, three, and six ducts, the location of keys in both the vertical and horizontal key-spaces being show in Fig. 6. j j

A is the clay conduitsection, prefer ly of general rectangular form and containing two or more ducts B. The intervening partitions b etween the ducts are formed of two longitudinal walls a b, having an `intermediate rectangular air-space c, and in the case of a conduit-section having four or more ducts in dierent horizontal and vertical planes the crossing walls of the intervening partitions are also separated by a central opening d. The width of an intervening partition, in`

cluding the two Walls and the intermediate space, is the width of two of the outer walls of the conduit or slightly Wider, so that in joining sections having a smaller'numberl of ducts with a section having a larger number of ducts, as illustrated in Fig. 2, the substantial continuity of the surfacesof the ducts can be maintained at the joints.

The provision of .intervening partitions made of two walls and an intermediate space is advantageous, not only for the reason just statedbut for the further reason that the cables in one duct are better protected against injury from the burning out of a cable rin au Width ot the separation between the ducts and also the presence of the intermediateair-I space, and, still further, by the making of adjoining duct on' account' of the additional these partitions with double walls and an intermediate air-space a uniform shrinkage in firing the clay is secured, which would not be the case it the partitions were solid and had the entire thickness ofv the two walls and the intermediate air spaee.- The oblong airspaees in the partitions separating the ducts of the conduit also permit the vemployment of keys C, having anoblong cross-section, which may be provided with Ispacing-pins"e and which are inserted in these air-spaces of the adjoining sections of the conduit and serve to keep the sections in alinement. One

or more of these keys will be employed at each joint, preferably two or more where thev conduit-sections have two or more of such spaces, and in the case of a four-duct or sixduct conduit having ducts in different horizontal andvertical planes keys are preferably inserted both in one or more of the horizontal intermediate air-spaces and iu one or rating the ducts. and the iiat keys till these spaces, such keys act effectively as separators to cut'o communication between adjoining ducts at the joints of the conduit-sections, and particularly to prevent the passage of an arc through the joints from one duct to another. To accomplish this result most effectively, the keys should be used in all the keyspaces, as shown in Fig. 6, so as to separate all the ducts from one another at the joints.

What I claim isl. A clay conduit-section having a pluralityof d ucts and provided with partitions separating the d ucts, which are formed of two walls and an intermediate air-space, substantially as set forth.

2. A clay conduit-section having a plurality of ducts in different horizontal and vertical planes and provided with partitions Separating the ducts composed of two Walls and an intermediate air-space, and an additional longitudinal opening at the intersection of crossing partitions, substantially as set forth.

3. The combination with adjoining claj7 conduit-sections having intermediate oblong spaces in the partitions separating the ducts, of a key oblong in cross-section entering these spaces in the adjoining sections for maintaining the alinement of the sections, substantially as set forth.

t. The combination with adjoining clay conduit-sections having a plurality of ducts located at different horizontal and vertical planes and provided with intermediate oblong spaces in the vertical and horizontal partitions scparating the d ucts, of keys oblong in cross-section inserted both in the horizontaland vertical partition-spaces, substan tially as set forth.

5. The combination with adjoining clay conduit-sections having oblong key-spaces in their ends, of alining-keys of oblon g crosssec tion made of insulating material, substantially as set forth.

6. The combination with adjoining clay conduit-sections having a plurality of ducts -and oblongr spaces in the partitions separating the ducts extending the entire length of such partitions, of separators inserted in these spaces and crossing the joints between sections to cut oif communication between the ducts at the joints, substantially as set forth.

7. A clay conduit-section, having a plurality of ducts and provided with partitions separating the ducts, such partitions having a thickness double that of the outside Walls of the conduit-section, substantiallyas set forth.

S. A clay conduit-section, having a plurality of ducts and provided with hollow partitions separating the ducts, such partitions having a thick-ness double that of the outside waiis of the cond uit-section, substantially as set forth.

This specification signed and witnessed this 9th day of December, 1901.

VERNON Il. YARNALL. iVitnesses:

J No. Roinr. TAYLOR, JN0. Louis Lo'rson.

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