US788662A - Apparatus for melting tar and heating gravel. - Google Patents

Description

PATENTED MAY 2, 1905.

F. MARSH.

APPARATUS FOR MELTING TAR AND HEATING GRAVEL.

7 APPLICATION FILED DEC. 9, 1904.

NITED STATES Patented May 2, 1905.

PATENT OFFICE.

FRANK MARSH, OF NEWARK, NEW JERSEY, ASSIGNOR OF THIRTY-SEVEN AND ONE-HALF PER CENT. TO JOHN HJDALE, OF NEWARK, NEW JERSEY, AND TWENTY-FIVE PER CENT. TO EDWARD C. DAVIDSON,

OF ELIZABETH, NEW JERSEY.

APPARATUS FOR MELTING TAR AND HEATING GRAVEL.

SPECIFICATION forming part of Letters Patent No. 788,662, dated May 2, 1905.

Application filed December 9, 1904. Serial No. 236,087.

To all whom it new concern:

Be it known that I, FRANK MARSH, a citizen of the United States, residing at Newark, New Jersey, have invented certain new and useful Improvements in Apparatus for Melting Tar and Heating Gravel, of which the following is a specification.

This invention relates to the apparatus ordinarily employed in the laying of pavement or other structures or work requiring the admixture of a material such as tar with heated gravel, sand, or stone. It comprises an organization hereinafter set forth in detail by which the tar is melted and the gravel heated at the same time by the same fire and in the same apparatus.

In the accompanying drawings, Figure 1 is a perspective view, partly broken away at one side; Fig. 2, a plan view, and Fig. 3 a detailed sectional view on the line 3 3 of Fig. 2.

The apparatus comprises an ordinary melting-furnace consisting of a shell A, in the top of which is seated an open melting-pot B, and in the bottom is a door 0 for the insertion of fuel, which is usually wood.

f is a pipe near the top of the shell for carrying off products of combustion.

Provision as follows is made for heating the gravel: Around the exterior of the shell A is a trough 0, consisting of but a vertical side 71: and a horizontal side or bottom J, braced at their junction by an ,angle-iron Z. This structure is suspended from the upper edge of the shell by hangers D, having hooked ends 2', that engage the rim of the melting-pot, extend downwardly against the sides of the shell, and then outwardly under the bottom J of the trough; This construction affords an open trough of which the inner wall is formed by the shell of the heater. For convenience the trough C may be formed in sections, four such (marked 1, 2, 3, and 4:) being shown. In this case hangers D are applied at or near both ends of each section. This makes a convenient arrangement for transporting and handling the heater and trough.

9 indicates the gravel. The trough C also acts as a platform upon which the workmen may stand to have convenient access to the melting-pot B.

So far as I am aware, an apparatus of this general character by which the simultaneous operation of the melting of tar or other similar material and the heating of the gravel or other similar material may be simultaneously conducted is new. Practical experience has shown it to be efficient and economical.

Heretofore separate heaters have been required for the gravel, and with this apparatus the same results are obtained with a single fire in the use of no more fuel than is necessary for the melting operation.

I claim as my invention 1. A tar-melting heater comprising a metal shell and open melting-pot, combined with an external gravel-receptacle, independent of the pot and located below it, for the purpose set forth.

2. A tar-melting heater comprising a metal shell, a melting-pot and an annular trough independent of the pot and surrounding the shell for the reception of gravel, for the purpose set forth.

3. A tar-melting heater comprising a metal shell and melting-pot, combined with an external, removable gravel-trough, for the purpose set forth.

4. A tar-melting heater comprising ametal shell and melting-pot, combined with an external, annular, sectional, removable graveltrough, for the purpose set forth.

5. A tar-melting heater comprising a metal shell and melting-pot, combined with a detachable external trough, the inner wall of which is formed by the shell of the heater.

6. A tar-melting heater comprising a metallic shell and melting-pot, asectionalextersections are suspended from the upper edge nal gravel-trough and hangers by Which the of the heater. IO trough is removably suspended from the up- In testimony whereof I have hereunto subper edge of the heater. scribed my name.

5 7. A tar-melting heater comprising a me- FRANK MARSH.

tallic shell and melting-pot, combined with an Witnesses: external gravel-trough, formed of removable L. F. BROWNING,

sections and hangers, by which the several KATHARINE MAoMAHoN.

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