US1484393A - Shovel-heating device - Google Patents

Description

Feb. 19 1924.

H. M. HANSON SHOVEL HEATING DEVICE Filed March 9. 1923 m M w Patented Feb. 19, 1924.

HARRY M. HANSON, OF DULUTH, MINNESOTA.

SHOVElli-HEA'IING DEVICE.

Application filed March 9, 1923.

To all ill/mm. it may concern Be it known that I. IIARIKY M. Hanson, a citizen of the United States, residing at Duluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Shovel- Hcating Devices, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to power shovels such as commonly used for excavations and the like and has special reference to a novel method of heating same to prevent detrimental sticking of the .n'iaterial being excavated to the shovel, this being the principal object. of the invention.

Other advantageous features will appear in the further chiscription of the invention.

In the accompanying drawing forming part of this application and in which like reference characters indicate like parts:

Figure 1 is a side elevation of one of a type of shovel to which my invention may be readily applied;

Figure 2 is an enlarged elevation, partly broken away, of a dipper shovel equipped with av form of the invention. and

Figure 3 is a perspective view of the inside corner of a dipper shovel having teeth upon the lip thereof, it also being equipped with the improved heating means.

In the process of making excavations, very sticky material, such as clay or the like, is encountered. which is known to result in much anntufance in the handling of same on account of its stick condition, frequently clogging upon the dipper in such a manner to render same inctficient. Again when exca 'ations of this class are conducted during cold weather, much annoyance is experienced by damp or wet material freezing in and about the dipper, and, to avoid or prevent these conditions in difiterent forms of? clippers, I have installed in the shovel or dipper being used a. heating element, which it is apparent may be varied considerably to produce the greatest elliciency.

In Figures 1 and 2 are illustratml a very common type of dipper 1, which is usually provided with a rein't'tn'cing lip band and may or may not be provided with plffihl'ltth ing teeth, such as illustrated at -3 in Figure 3.

Serial No. 623,867.

In this plain type of dipper an inner metal lining t may be incorporated about the walls of the dipper, particularly the two side walls and the front wall tl'iereof, or in fact it may be "found that the front wall alone being pro itled with the heating element might be sutlioient, and intermediate of this lining and the outer wall of the dipper or the lip band 2 thereof as the case may be, is installed a suitable heating element illustrated at 5. it being provided. with suitable wire connections through a protecting conduit or pipe illustrated at 6, which in extend .longitudinally of the dipper stick '7 and provided with any suitable ficxible connection intermediate ot' the dipper stick and the supporting boom therefor; the electric power being furnished from a source of supply on the shovel sup porting mechanism.

In Figure 3 is shown a fragmental portion of a dipper, having teeth mounted thereupon interinc-diate of which I propose to install an inner lining 8 and between which and to front wall. of the dipper is installed the heating element 9 connected in any desired manner to a source of supply, as previously described, and if heat is applied only to such e 'ential parts of" the dipper it may in many instances be found ample to overcome the difiiculty.

In Figure 3 I have illustrated the reinforcing band 10 as being channelled and having encorporatcd therein the heating elements 11 which is simply a modification of the construction.

Having thus described my inventimi, what I claim and desire to secure by Let tcrs Patent, is:

l. The combination with a -nrechaniral shovel. of electric heating elements installed within the walls thereof. and means for supplying constant electric current to the heat.- ing elements.

2. In combination. a mechanical shovel of the "ype described having protruding teeth upon the lip thereof. and an electric hiating element permant-uitly installed upon the lip iiuermcdiatc oi the teeth for the purpose dcscrili ed.

3. In conibiinition a power dipper oi the type described having a reinforcing lip band about the upper edge thereof and electrio heating elements permanently encorpo rated Within the band for the purpose dc scribed.

4. The combination with a mechanical shovel of the type described having a principal digging lip and side walls adjacent the upper portion thereof, of electric heating elements pern'ianently installed within said lip and walls for the purpose described. In festimony whereof I hereunto aflix my signature in the )resenee of two witnesses.

l-IARRY M. HANSON. \Vitnesses SLE BRONSON, S. GEO. STEVENS.

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