US1763637A - Skimmer - Google Patents

Description

Jne 17, 193()i R. J. ANDERSON SKIMMER Filed June 17. 1929 Patented June 17, 1930 raraur ortica ASSIGNOR T BELLE CITY MALLEABLE A CORPORATION 0F WISCONSIN 'SKIMMEB Application led June 17, 1929. Serial No. 371,503.

My invention relates to skimmers.

Such devices are commonly employed in connection with metal melting furnaces for the removal or skimming of slagand impurities from the surface of the molten metal. These skimmers, being subjected to terric heat quickly" oxidize. Even though subjected to the heat for but short intervals the life of these standard skimmers is all` too short, necessitating their frequent replacement. Obviously, such replacement involves exnse.

ore particularly therefore, the invention has to do with a' cooled skimmer.

The primary object of the invention thus, is to provide an improved form of skimmer including means for the rapid transfer and dissipation of heat therefrom in-such a manner that the same will he protected against au spoliation in use.

Another obiect is to provide a skimmer cooled by circulating a liquid 'therethrough to protect the same.

Still another purpose is generally to improve devices of the kind stated so that their period of usefulness will be materially increased.

Brielly, such objects are accomplished in the illustrative form of the invention herein to be disclosed, in which, the skimmer comprises, a hollovs1 skimmer head and a hollow shaft connected thereto, the latter including a handhold or handle. An inlet and an outlet for circulating a liquid, such for example as water,` are provided, there further being a partition in the shaft and extended into said cad to control will later more fully appear.`

In the accompanying sheet of drawings illustrating a practicable form of the invention:

Figure 1 is a proved skimmer;

Figure 2 is a side view thereof; A

Figure 3 is an end view of the head; and

Figure 4 is a view partly in cross section, as viewed along the line LI-Ji, appearing in Fi rc2.

ooking now in detail to these drawings, it et will be seen in the form of the invention the water circulation, all as bottom plan view of the imchosen for illustration, that' the skimmer comprises a hollow skimmer head 10, which may assume an elongated form generally in the shape of a rectangular box. Connected, centrally to a side thereof and extending therefrom is a hollow shaft 11, which in practice may be a length of pipe, as shown. Running centrally through the pipe shaft and vertically disposed therein is a partition wall 12 diametrically dividing the said shaft interior into two circulatory passageways. The wall has one end projected part way into the head to form a aille with a circulatory passageway between its free edge andthe adjacent side wall of the h'ead as appears clearly in Figures l and 2.

Near the free end of the shaft 1l the same is provided with an inlet nipple connection 13 and an outlet nipple connection 14, the inlet including an on and ,oif valve 15 operable by hand. The end of the shaft has connected thereto a handle or grip portion 16.

ln practice the inlet 18 is connected with a liquid supply, such for example as water, under pressure, and with the valve 15 turned on, the liquid is caused to enter one of the shaft passageways formed by the wall 12, to circulate therealong in the direction of the head 10. The liquid enters the head and is deilected by the baille in the manner indicated by the arrows, appearing inFigure l, to the ends of the head, and then back through the opposite passageway in the shaft and finally out through the outlet connection 14, in an obvious manner.

Thus, as the skimmer is subjected to the heat of the molten metal, the heat is rapidly transferred by the liquid to protect the device against oxidization and resultant destruction.

In practice all joints, seams, and connections will be acetylene welded.

The vertical disposition of the partition wall in the shaft is important as it insures that any defiection or distortion of the shaft from the heatwill cause such deflection to be lateral or side ways, with the resultant advantage that the head will 'always be in proper line for skimming.

From this detailed disclosure it must now thereof extended orv be clear that a simple and inexpensive form of skimmer has been provided which accomplishes all of the desirable objects heretofore recited.

lt is the intention to cover all such changes and modifications of the form of the invention herein disclosed which do not depart from the spirit and scope of my invention, as is indicated by the scope of the appended claims.

What is claimed is:

l. ln a skimmer, a. hollow shaft, a hollow skimmer head connected to and in communication with the shaft, a partition disposed longitudinally in the shaft to provide passageways, said partition extending part way into the head, and means for circulating a liquid through the passageways and head.

2. In a skimmer, a hollow shaft, a hollow elongated head connected thereto, a vertically disposed partition in the shaft, said partition forming' two passageways and arranged longitudinally of the shaft, and inlet and outlet connections in the shaft for circulating a liquid through the head and shaft.

A skimmer comprising in combination, a hollow shaft, a hollow head connected thereto, a partition disposed lengthwise of and vertically inside the shaft with the partition extending into said head to forni a baille which stops short ot' the head walls to leave a passageway to afford communication between the ends of the head, and connections with the shaft whereby liquid may be circulated continuously through the skimmer.

RUSSELL J. ANDERSON.

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