US2135683A - Mouthpiece wiper - Google Patents

Description

Nov. 8, 1938. H. T. SUNDSTROM MOUTHPIEC-E WIPER 2 Sheets-Sheet 1 Filed March '6, 1937 Nov. 8,1938. H. T. SUNDSTROM 33 MOUTHPIECE WIPER Filed March 6, 1937 2 Sheets-Sheet 2 l lllllllllll HermanT Suncl stv'vm 3 @AIM MQM.

Patented Nov. 8, 1938 UNITED STATES misses;

MOUTHPIECE WIPER Herman T. Sunclstrom, Houston, Tex.

Application March 6,

7 Claims.

My invention relates to the provision of a wiper for the discharge opening at the mouthpiece of the melting pot. It will be understood that when the charge of molten metal is forced from the melting pot to cast the slug of type metal there will be particles of molten metal adhering to the discharge openings and it is desirable to remove these particles of metal so that the next cast will be a good one without interference due to the presence of cooled particles of metal still adhering to the discharge openings.

Wipers to remove the cold metal thus adhering to the discharge openings have previously been employed but such wipers have been found to be 1 objectionable for certain reasons which applicant has desired to overcome in the present construction.

An object of the invention is to mount a wiper assembly upon the frame of the melting pot itself so that when the melting pot is moved in the discharge of the metal to the mold the wiping mechanism will move simultaneously so that the wiper arm will always be in proper position relative to the mouthpiece which is to be wiped.

Another object of the invention is to overcome a common objection to devices of this kind by mounting the wiper arm proper in such manner that it may yield resiliently in either direction when obstructions are encountered. It has been 3 a previous objection that when the end of the wiper arm is given a lateral movement for any reason the arm is sprung somewhat at the point where it is pivotally mounted and objectionable wear quickly occurs. I contemplate the provision of a yieldable engagement which allows lateral movement, without detrimental eifect, to the mounting of the arm.

Another object of the invention is to provide an efiicient means for giving a swinging movement to the wiper arm at the proper instant in the operation of the casting mechanism.

With reference to the drawings herewith, I have shown my wiping mechanism and its means for mounting. In Fig. 1 I have shown a side view of my wiping mechanism with certain well known parts of the Linotype machine connected therewith, the'larger part of the machine itself being broken away.

Fig. 2 is a top plan view of the wiping mechanism with the broken parts of the machine shown in relation thereto.

Fig. 3 is a front elevation of the wiping mechanism with the larger part of the machine broken away.

1937, Serial No. 129,313

Fig. 4 is a vertical sectional view of the means for pivoting the wiper arm.

Inthe description of my device it will be understoodthat it is adapted for use upon an ordinary form of typecasting machine such as are ordinarily termed in'the trade as Linotype machines. The type metal is reduced to a molten condition in a melting pot l, which is supported relative to the frame of the machine. It has a downwardly extending leg 2, which is broken away. This melting pot has a jacket around the same and the upper cover for the jacket is shown at 3. It will be understood that this pot is pivoted to move when the cast is made, said pot being moved by engagement of the usual operating mechanism with member 4. At the forward end of the pot is a mouthpiece 5 shown best in Fig. 3, through which the metal is discharged to the mold.

Adjacent the forward side of the melting pot is a mold disc 6, which is driven through a mold disc pinion l engaging therewith. The mold disc is rotatable and is also adapted to be moved outwardly away from the mouthpiece to a limited extent, as shown by the dotted lines 8 in Fig. 2. When the disc is moved to the dotted line position the mouthpiece 5 of the melting pot is in posi tion to be wiped free of the metal by the wiper shown at 9. v

The mechanism by means of. which the wiper arm is operated is best seen in Fig. 1. At the rear of the machine is the usual cam shaft I0 upon which there is a driving gear I I having in connection therewith the mold cam !2. Mounted on the bracket [3 below the mold shaft is a pivot shaft l4 upon which the ejector lever I5 is supported. The ejector lever is operated automatically by the mold cam l2, which contacts with a lug 19a on the arm I8. Said lug !9a is formed with a finger projecting toward the gear H and into the path of the cam l2 which at the proper time engages said lug and moves the lug and the lever I5 a short distance and then slips out of engagement and releases said lug and lever. An interrupted cam wheel mounted on the shaft 10 and on the opposite side of the lever I! will later engage the lug IE on said lever and move it back to its original position. This lever is as usual provided with a handle l! for manual operation in making adjustments in the machine during its operation. For purposes of clearness the-cam 50 is not shown in Fig. 2.

The ejector lever has an arm I8 thereon projecting forwardly to a point adjacent the mold cam l2. Upon the arm I8 is mounted a laterally projecting pin l9, which may be integral with the arm or detachably secured thereto. This pin projects into a slotted opening 20 in a cam plate 2|. Said cam plate is supported at one end 22 to the wiper lever 23. At its other end it is supported on a spacer arm 24 connected to the wiper lever at such a point as to hold the cam plate 2| in proper position relative to the pin l9 which fits therein. As will be noted from Fig. l, the cam plate 2| has a curved track which, when the pin l9 rides therein, will move the wiper lever 23 downwardly and then backwardly again.

The wiper lever extends upwardly and is pivoted at 25 to a supporting bracket 26 secured upon the frame 21 of the machine. On the forward side of the pivot 25 I form a joint in the arm to allow for the adjustment of the forward portion 28 of the wiper lever. To do this I connect the forward extension 28 of the wiper arm pivotally to the end of the arm 23, as shown at 29. The ends of the two sections'of the lever overlap and on the overlapped portion I have a set screw 38 in the arm 28 engaging within an arcuate slot 3| in the forward section of the arm, which, as will be readily understood, allows a slight adjustment of the forward end 28 as may be desired in fitting the device to the particular machine upon which it is placed.

The arm section 28 has a pivotal connection at 32 with a link 33 which depends downwardly therefrom. As will be seen particularly from Fig. 3, this link 33 is secured at its lower end to a lever 34, which is rigidly connected at 35 to the wiper arm 36. It will be seen, therefore, that when an upward pull upon the link 33 is exerted through the arm 28, as indicated in dotted lines in Fig. 3, the wiper arm will be'given a swinging motion across the mouthpiece. The wiper 9, is detachably connected at 31 with thewiper arm and may be readily replaced when worn.

The wiper arm 36 is connected at its upper end to a pivot pin 38. This pin is mounted within a bushing 39 which is in turn' screwed within an opening in the lower end of a bracket 48 secured to an upright post 'or support 4| mounted on the side of the melting pot at 42. This post 4| has a brace 43, shown best in Fi 3, which extends across the upper portion of the melting pot and is attached at 44 to the opposite side thereof. It will be seen therefore that the bushing 39 within which the pin' 38 is rotatable is held rigidly in position at the proper point for the support of the wiper arm 36. The end of the arm 36 which fits over the pivot pin 38 extends slightly beyond the pin and bears between a flange 45 on the end of the bushing 39 and a washer 46 mounted on the pin adjacent the arm. The pivot pin 38 extends through the bushing 39 and has a spiral spring 41 mounted thereon, said spring bearing against a washer 48 on the pin at one end and against a lock nut 49 on the bushing at the other end. It will be seen therefore that the spring acts to move the pivot pin 38 resiliently to the left in Fig. 4, thus clamping the washer 46 resiliently against the flange 45 upon the bushing. This mounting for the wiper arm 36 permits the wiper arm a certain limited lateral movement, as will be obvious from Fig. 4. If, for example, the arm 36 is swung to the left from its normal position the upper end-of the wiper arm will exert a thrust against the upper end of the washer 46 and spread the washer away from the flange 45 on the bushing and slightly compress the spring 41. As soon as the force exerted on the wiper to move it in this manner is released the arm will immediately swing back to its normal position ready for use. This mounting for the wiper arm is an advantageous feature of my invention and overcomes difficulties commonly experienced with other devices of this character.

In the operation of the machine it is to be understood that when the cam I2 operates to move the ejector lever I5 in its usual manner the pin IS on the ejector lever will move in the cam slot 20 and thus move the wiper lever so as to actuate the wiper arm. This movement to actuate the wiper arm takes place at the time in the sequence of operations of the casting mechanism when the mold disc 6 is moved forward to its dotted line position. Thus when the lever arm is moved downwardly the mold disc is not in position to interfere with the movement of the wiper arm and the wiper thus is swung to the dotted line position shown in Fig. 3, wiping across the mouthpiece and removing any particles of metal adhering thereto. It is swung immediately back to its inoperative position and is out of the way when the mold disc again moves backward into position against the mouthpiece of the pot to receive another charge of metal.

It will thus be seen that I have a simple operating mechanism which serves to actuate the wiper in an eificient manner and I have made provision to avoid strain or distortion upon the wiper arm when said arm is moved by obstruction at the mouthpiece or otherwise in a position to swing it in a lateral direction relative to its pivot on the pin 38. It is thus yieldable so that the wiper will not become broken or the pivot upon the pin 38 will not become unduly worn.

The advantages of this device will be obvious to those skilled in the art.

What is claimed is:

1. A mouthpiece wiper for type casting machines including a wiper lever, means. to pivotally support said lever between its end, means at the rearward end of said lever to move said lever in a vertical direction, a wiper arm pivotally supported upon the melting pot, a wiper thereon positioned to engage the pot mouthpiece when said arm is moved, and a link on said wiper lever engaging said Wiper arm to swing the same.

2. In a type castingmachine including a melting pot, a mouthpiece thereon, a mold disc adjacent said mouthpiece, a cam shaft, a cam member thereon and an ejector arm moved by said cam member, the combination of a wiper lever pivoted to said machine at a point intermediate the ends of said lever so as to rock, means on said lever cooperating with said ejector arm to rock said lever, a wiper arm, means to pivotally support said arm between its ends on said pot, a wiper on said wiper arm adjacent said mouthpiece, and a link connecting said wiper lever with one end of said wiper arm to swing said wiper across said mouthpiece.

3. In a type casting machine including a melting pot,.a mouthpiece thereon, a mold disc adjacent said mouthpiece, a cam shaft, a cam member thereon and an ejector arm moved by said cam member, the combination of a wiper lever pivoted to said machine, means on said lever cooperating with said ejector arm to move said lever, a wiper arm, means to pivotally support said arm on said pot, including a post on said pot, a bushing in said post, a pin rotatable in said bushing and upon which said wiper arm is pivoted, and resilient means to hold said arm against said bushing but allowing a limited lateral movement of said arm, a wiper on said wiper arm adjacent said mouthpiece, and a link connecting said wiper lever with said Wiper arm to swing said wiper across said mouthpiece.

4. In a type casting machine including a melting pot, a mouthpiece thereon and a mold disc adjacent said mouthpiece, the combination of a post on said pot, a bushing in said post, a pivot pin in said bushing and extending therefrom, a washer plate on said pin adjacent said bushing, a wiper arm pivoted on said pin between said bushing and said washer plate, means to hold said bushing, arm, and plate resiliently together, and means to swing said wiper arm and wiper to wipe said mouthpiece, when said mold disc is moved forwardly.

5. In a type casting machine including a melting pot, a mouthpiece thereon and a mold disc adjacent said mouthpiece, the combination of a post on said pot, a bushing in said post, a pivot pin slidable in said bushing, a wiper arm pivoted on said pin, means normally holding said wiper arm in position on said pin but resiliently yieldable to allow lateral play in said am, and means to swing said arm and Wiper, to clean said mouthpiece.

6. In a type casting machine including a frame, a melting pot thereon, a mouthpiece on said pot, a cam shaft, an ejector arm pivoted in said frame to be moved by a cam on said shaft, in combination with a support on said pot, a Wiper arm pivoted on said support, a wiper on said arm, a wiper lever rockably supported on said frame, means on said wiper lever engaging said ejector lever to rock said lever, and means connecting said wiper lever with said wiper arm to swing said wiper across said mouthpiece.

7. In a machine of the character described, a frame, a melting pot thereon, a mouthpiece on said pot, a wiper arm supported on said pot, a cam shaft, a wiper lever rockably supported on said frame, a link connecting the forward end of said lever with said wiper arm, and means responsive to the rotation of said cam shaft to rock said wiper lever and move said wiper arm across said mouthpiece.

HERMAN T. SUNDS'I'ROM.

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