US2279303A - Electrical apparatus - Google Patents

Description

April 14, 1942. P. o. GROUT I ELECTRICAL APPARATUS Original ,Filed Sept. s, 1934 :FIGJ.

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Patented Apr. 14, 1942 *UNITED STATES rerun-T OF E Q I ntcornrizfiigiamrus V I Raytheon- Manufacturing Company, Newton, .Mass., a corporation of Delaware originalapplication September '6, 1934-, Serial J No. 742,913,!1owPatent No. 2,171,512,-dated August 29, 1939. [Dividedand this application July 19; 1939,..Serial No. 285,465

Claims. (o1. 248-358).

This invention relates to a support for an electrical space dischargetube. sion of my copendingapplication'foran improvement in Electrical apparatus, Serial No. 742313,

filed September 6, 1934, which has now matured iporting structure; and

Fig. 2 is a side View of the structure-shown in Fig. 1.

I have devised a novel electric arc-welding machine comprising -a 'gaseous discharge rectifier, and various other-elements. This system is described and claimed in myxPatent No. 1,928,848. 7 1

The Weldingmachine is often subjected to se- This is a divivere handling, and since the rectifier tubeis generally constructed of' glass and usually contains a considerable quantity of .mercury, it is necessary to protect the tube in 'order to prevent dam- .age to it as a result of such handling, The chief danger of damage resides in the free body of mercury inthe tube. If the tube were merely supported by a resilient structure, and were subjected to a sudden displacement, Oscillations by the tube of considerable amplitude would be set up. There would also be a tendency for the mercury to be thrown from one part of the tube to another. The impact of the body of mercury would be likely to damage the construction within the tube. Such a tube 6 is mounted in a sup port 5 which avoids the above difficulty and effectively prevents any severe shocks from damaging the tube.

The support 5 consists of a base 95 and a frame 96. These parts are preferably constructed of standard angle iron. The frame 95 in the embodiment shown is U-shaped. Two braces 91 are provided to afiord the proper rigidity to the support of the frame 96. The frame 96 at the upper end carries the two brackets 98 andthe base 95 carries the two brackets 99 in vertical alignment with the brackets 98. In order to hold the tube 6, a split ring I00 is provided. The two halves of this ring are held together around the tube =6 by bolts IN; The, upper half of the ring I00 carriesa loop I02 which fits over the top neck I03 of the tube "6. The lower hal'f'of the ring I00'carries -a'loop I04 which fits :over the lower neck -I05of'the tube6. To thetwo sides of the lower. half of ring I00 are connected two bars I06 each having a hole at its upper and lower end. Two upper springsIOt'; have their upper ends hooked over the top brackets 98 and their. lower ends hooked through -:the holes in the upper ends of -bars I96. Two lower springs [I07 have their upper ends hooked through the .holesin the lower ends of-bars' I05 and their lower ends hooked onto 'thei lower brackets 99. In'this way tube 6 carried by-the ring I00 is resilientlysupportedzwithrespect to the framel96;

In order to prevent excessive oscillation of "the tube 6 and in order to prevent the body of mer curywithin the tube from damaging'th'e internal construction thereof; the ring I00 has connected thereto a special snubbing device". Thissnubbing device consists mainlyof, -an inertia wheel I 08. The Shaft I09 of the inertia wheel H18 is rotatably' mounted on the rear cross-bar '0 of the base 95. The shaft I09 also carries apulley I II around which is wound the snubber'cablev I I2. The snubber cable has one or more'turns around the pulley III. 1 One. end of the cable H2 is securely fastened to" the lower side'of ring IIlIl'by some suitable means such as the eyelet H3 and pin "41? A'jpulleyfg I I5-is secured 'to the lower side of base 95. Cable .I-I2'passes 'over pulley I15 before it passes around the pulley III. In order to apply the proper tension to cable II2, a spring H6 has one end thereof connected to the other endof the cable H2. The other end of the spring H0 is securely fastened to the frame 95, as shown. A pulley H1 is mounted to the rear of the bar I I0. The cable passes over the pulley In between the pulley III and the spring H6. By the use of the two pulleys II5 and II I, the inertia wheel I08 may be placed in any desired position, whereby the space available maybe used to the best advantage.

The various elements of the above system are so chosen that when the tube 6 is suddenly displaced downwardly, the cable I I2 will loosen on the pulley I I land the spring I It will take up the slack, causing the cable M2 to slip around the pulley I I I. At the same time springs I00 will be tensioned. When the springs I05, due to their tension, start to move the tube 6 upwardly, the cable I I2 will tighten on the pulley II I and tend to cause pulley III to turn. This likewise tends its neutralposition. The action which takes place between the inertia wheel I08 and the cable "2 is similar to that of a one-wayclutch. Thus inertia wheel rotatably mounted with respect to in certain instances it may be possible to sub- In stitute other one-way clutch structures in mydevice instead'of the specific one shown in thedrawing. This action thus prevents any sudden upward movement of the tube 6. sudden upward movements which tend to throw the body of mercury in the bottom of tube 6 against other parts of the'tube, the snubbing action performed by the inertia wheel and its associated structure effectively'removes this danger.

In order to provide a convenient means of holding the various electrical connections to the tube 6 in place, the frame 96 is provided with a number of'insulatingblocks II8, each provided with a plurality of slots 'I I9in which the electrical conductors for tube 6 are held. One or both of the braces 91 also havea similar block I20. On the front cross-bar I2I of the base 95 is mounted an insulating bar I22 carrying a number of bindingposts I23 for the purpose of making the proper connections to the tube. Due to this arrangement, the tube 6 may be assembled in its frame and be connected electrically in the proper manner before the frame and tube are placed in the machine. Upon being placed therein and bolted in place, most of the electrical connections of the tube 6 to the machine itself may be accomplished by connecting the proper conductors to the binding post .Of course it to be understood that-thisinvention is not limited to the particular. details of the arrangement as described above as many equivalents will suggest themselves to. those skilled in the art. It is accordingly desired that the appended claims be given a broad interpretation commensurate with the scope of the invention within the art.

iWhat is claimed is:

l. A support foran electrical space discharge tube comprising a rigid supporting frame, an auxiliary supporting means for supporting said tube, springsinterposed between said auxiliary supporting means and said frame for resiliently supporting said auxiliary supporting means, an

ertia wheel, a cable attached at one end to said auxiliary supporting means and having at least one complete turn around said pulley, and a tension spring connected to the other end of said cable.

p A 2. A support for an electrical space discharge -tube comprising supporting means for support- Since it is ing saidtube, a supporting base, means for resiliently supporting said supporting means on said supporting 'base, an inertia wheel rotatably mounted with respect to said supporting base, a

pulley fixed to said inertia wheel, a cable attached at one endrto said supporting means and having at leastone complete turn around said pulley, and a ten'sion'spring connected to the other end of said cable.

' tube comprising a rigid supporting frame, an

auxiliary supporting means for supporting said tube, springs interposed between said auxiliary supporting means and said frame for resiliently supporting said auxiliary supporting means, an inertia wheel rotatably mounted with respect to said supporting frame, a pulley fixed to said inertia wheel, a cable attached 'at one end to said auxiliary supporting means and having a turn around said pulley, and a tension spring connected to theother end of saidcable.

5. A support for an electrical space discharge tube comprising supporting means for supporting said tube, a supporting base, means'for resiliently supporting said supporting means on said supporting base, an inertia i wheel rotatably mounted with respect to said supporting base, a pulley fixed to said inertia wheel, acable attached at one end to said supporting means and having a turn around said pulley, and a tension PRESCOTT D. GROUT.

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