US1511349A - Machine for forming brass spring strips for radiators - Google Patents

Description

ca. H. LOBER MACHINE FOR FORMING BRASS SPRLNG STRIPS FOR RADIATORS Filed April 8, 1921 Y 2 SheeLs-Shgt 1 4% INV NTUR- Oct. 14. 1924. $1,511,349

- e. H. LOBER MACHINE FOR FORMING BRASS SPRING STRIPS FOR RADIATORS Filed April 8, 1921 2 Sheets-Sheet 2 Patented Get. 14, 1924.

UNITED STATES GEORGE H. LOBER, F TOLEDO, OHIO.

MACHINE FOR, FORMING BRASS Application filed April 8,

To all whom it may concern:

Be it known that- I, GEORGE H. LoBER, a citizen of the United States, and a resident of Toledo, in the county of Lucas and State of Ohio, have made an Invention Appertaining to Machine for Forming Brass Spring Strips for Radiators; and I do hereby declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompany ing drawings and to the characters of reference marked thereon, which form a part of this specification.

My invention has for its object to provide an eflicient machine for forming springs from strips of spring brass whereby transverse corrugations may be successively formed and also whereby the strips may be cutat the proper lengths suitable for as sembling in a radiator.

The invention may be contained in structures of different forms. To illustrate a practical application of the invention I have selected a structure containing the invention and shall describe it hereinafter. The

structure selected is illustrated in the accompanying drawings.

Fig. 1 of the drawings illustrates a front view of the machine selected for purposes of illustration. Fig. 2 illustrates a part of the brass strip operated upon by the machine. Fi 3 is an end view of a portion of the maciine. Fig. 4 illustrates a pair of feeding rolls and shows a section taken on the line 44 indicated in Fig. 1. Fig. 5 illustrates a sectional view taken on the line 55 indicated in Fig. 4. Fig. 6 shows a side view of a part of the mechanism illustrated in Fig 4.

In the figures, 1 is the supporting framework of the machine. The machine may be driven by a drive pulley 2 which operates the crank shaft 3 supported in the frame 1. A ram 4 is connected to the crank shaft 3. Dies 5 and 6 are connected to the ram 4 and coact with the die 7 to shape the strips of brass 8 that are. fed to the machine from the spools 9. The spools 9 are supported on the bracket 10 secured to the frame 1 of the machine.

The dies 5, 6 and 7 have transverse corrugations conforming to the shape into which the strips 8 are to be formed. The die 5 is connected to the ram 4 by means of SPRING STRIPS FOR RADIATORS.

1921.. Serial No. 459,766.

rods 11 that are loosely mounted in the ram 4 to permit a certain amount of free movement of the die 5 relative to the ram 4. The die 5 is yieldingly held away from the ram 4 by means of springs 12 located between the die 5 and the ram 4. The strips 8 are fed across the dies 5, 6 and 7 and the corrugations are formed by the operation of the die 6 coacting with a portion of the die 7. As the strips are further fed above the die 7 the die 5 operates to position the previously formed corrugations with reference to the corrugation that is about to be formed by the die 6. The springs 12 force the previously formed corrugations into certain of the corrugations of the die 7 previous to forming the succeeding corrugations, by the operation of the die 6, since the spring 12 will force the die 5 against the formed portion of the strip and thus force the corrugated portion of the strip into the corrugations of the die 7. The springs 12 operate to hold the strips 8 in posit-ion while the ram 4 is moving down and causes the die 6 to form the additional corrugation or ad ditional corrugations in the strips 8'. When the dies 5 and 6 are lifted the strips are again fed forward into the machine.

The strips are fed into the machine by means of the rollers 13 and 14 that are connected together by the cog wheels 15. The rollers are operated by a ratchet 16 and a dog 17. of the roller 13 while the dog 17 is located on the arm 18 that is oscillated by the link 19 which is connected to the arm 18 and is also connected to the crank shaft 3 by means of the bell crank lever and the link 26. The rollers 13 and 14 are thus operated in unison with the operations of the ram 4 and they move to feed the strips 8 into the machine when the ram 4 is lifted. The length of the strips 8 that are thus fed successively into the machine may be varied according to the position of the pivot point of connectionbetween the head 20 on the crank shaft 3 and the end of the link 26. The head 20 may be provided with a slot and'a pair of overhanging plates 21, and a lug 22 may be adjustably secured in position in the head 20 by means of the bolt 23. The link 26 is pivoted to the lug 22 and is also pivoted on the bolt 23 whereby the head 20 may rotate relative to the link 19 and the link 26 may perform transverse oscillatory movement to conform to the The ratchet 16 is connected to the shaft movements of the arm located on thebell crank lever 25. Also the extent ofJeach of the step by step movements of the rollers 13 and 14 may be varied according to the adjustment of the link 19 relative to the arm 27 located on the bell crank lever 25, The extent of the step by step movements where a single corrugation is formed bythe diev that supportsthe rollers 13 and 14 on the The lower roller 14 is supportframe 1. edin bearing blocks 30 that are raised'by the operation of the-springs -3l so as to press the 'r0llerl4 against'the roller 13. The sides of the frame 29 are provided with rods 50 that extend through holes formed in the sides of the frame and so as to press against the tops of the blocks 30. pushed down by the plate that forms a part of the lever 28, when the lever 28 is pushed down by the operation of the ram 4 which strikes the head ofthe adjustable screw 33. When, therefore, the ram has reached a certain position in its downward movement, the lever 28 is forced down which pushes the blocks 30 down against the tension of the compression springs 31 and thus the roller 14 is lowered to release the strips 8 which permits the die 6 to draw the strips forward into the machine. v

The strips are severed when sufficient lengths of the corrugations have been formed by means of the plunger 34 which is also operatedby the bell crank lever'25. The time of the operation of the plunger 34 is automatically controlled by the machine and 'so that the plunger 34 is operated aftera predetermined number-of corrugations have been formed. A link 35 is connected toithe bell crank lever and to an arm '36 that is." provided with a dog 37 that operates upon the ratchet 38 in substantially the same mannerthat the ratchet 16 is operated upon by the-dog 17; The ratchet 38 is pivotally supported on" the-frame l for rotative movements and as the bell crank lever 25 is operated by the adjustable link 26 the ratchet 38 is rotated The ratchet38 is provided Witlra camsurface 39,-w hich operatesnpon theend of an arm of the bell cranklever40 when the cam 39nreaches certain point in its rotation; Thebell crank the dotted lines 4 The rods 5 0 are lever. 40 is pivoted on the frame 1 and operates to draw a sliding rod 41 that is supenacting, with an opening 46 formed in the table of the machine, se vers the strips 8. This is performed when the plunger is operating through the die 6 to form corrugation, ,The plunger 34 and the cooperating opening 46 is preferably'so shaped as to cut out pieces of thestrips located'between 7 indicated in Fig. 2. Therefore the edges of the plunger-34 coact with both side edges of theopening 46 to remove-the portions of the strips between, the dotted lines 47. I

, I claim: Y

1. In a machine for forming strips, a stationary die, a ram,a pair of dies connected to the ram, one of the dies movable relative to the ram, compression springs lore intermediate the movable die and the end of the ram forpositioning the strips relative to the stationary die and for bolding the strips whilethe other die connected tothe ram co-acts with the stationary die to shape the sheet material, a pair of rollers feeding the strips over the stationary ,die, and means operated by the ram for releasing the rollers from the strips .2; inamachine for forming strips, a stationary die, a rain, a pair of diesconnected to the ram, one of the dies movable relative to the ram, compression springs located inthe ram for positioning the strips relative to the stationary dieand 1 forholding the strips while vthe other die connected 'tothe ram co-acts with the stationary die to shape of operations of the-ram. in testimony whereof I have hereunto signed my name- :to this specification;

GEORGE H. Lor ne,

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tern' ediate the movable die and the end of

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