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Publication numberUS852302 A
Publication typeGrant
Publication dateApr 30, 1907
Filing dateDec 28, 1905
Priority dateDec 28, 1905
Publication numberUS 852302 A, US 852302A, US-A-852302, US852302 A, US852302A
InventorsEarl T Strong
Original AssigneeJames A Gibson, Edward J Buckbee, Earl T Strong
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Stay-bolt cutter.
US 852302 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

PATENTED APR} so, 1907.


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PATENTED APR. 30, 1907. V



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Specification of Letters Patent.

Patented April 30, 1907.

Application filed ecember 28, 1905. Serial No. 293,654.

To all whom it may concern.-

Be it known that I, EARL T. STRONG, a citizen of the United States, and a resident of Urbana, in the county of Champaign and State of Illinois, have invented a new and Improved Stay-Bolt Cutter, of which the fol lowing is a full, clear, and exact description The invention relates to boilermakers implements, and its object is to provide a new and improved stay bolt cutter arranged to permit of conveniently and quickly cutting the stay 30lt inside of the sheet, to facilitate removal of a worn-out fire-box of a locomotive or other boiler, and without first requiring the removal of the back sheet of the boiler.

The invention consists of novel features and parts and combinations of the same, which will be more fully described hereinafter and then pointed out in the claim.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference ind cate corresponding parts in all the views.

Figure 1 is a side elevation of the improvement as applied, the stay bolt and boiler sheet being shown in section; Fig. 2 is a longitudinal sectional elevation of the same, showing the cutter in an inactive position; Fig. 3 is a rear end view of the improvement; Fig. 4 is a front end view of the same; Fig. 5 is a plan view of the same, the rotating or dr ving sleeve being shown in section; Fig. 6 is a sectional plan view of the forward end of the innn'oveinent, on the line 66 of Fig. 2; Fig. 7 is transverse section of the improvement, on the line 7- 7 of Fig. 2; Fig. 8 is a perspective view of the lever for carrying the cutter; and Fig. 9 is a like view of the cutter.

On the cylindrical stock A of the implement is mounted to slide lengthwise a sleeve B, provided, at its outer end, with keyways B adapted to be engaged by a key held on the driving shaft C of a suitable motor employed for rotating the sleeve B, and with it the stock A, as hereinafter more fully described, the said shaft G being held in position on the sleeve B by a nut l), as indicated in the drawings. The sliding movement of the sleeve B on the stock A is limited by a stop-plate E fastened to the outer end of the stock A by screws E, and the said stopplate E is adapted to abut against an annular shoulder B formed on the forward end of the sleeve B, as plainly indicated in Figs. 2 and 5.

The stock A is provided with a lengthwiseextending slot A in which extends a lever F, carrying, at its forward end, a cutting tool G and fulcruined on a pin H secured in the stock A. The cutting tool G is provided with a radially-extending cutting edge G, adapted to cut the tubular end of the stay bolt I a distance inside of the boiler sheet I, as plainly illustrated in Figs. 1 and 2. The forward end A of the stock A is reduced and preferably made of a separate piece, secured by pins A to the forward end of the stock A, and the said reduced end A is adapted to pass into a drill hole I formed in the outer end of the stay bolt I. The slot A is continued into the removable end A but terminates a distance from the outer terminal thereof, and in this terminal is formed a chipreceiving recess A to allow accumulation of chips cut by, the cutting edge G until the implement is removed from the stay bolt after the same is cut in two.

The cutting tool G is preferably removably held in the forked end F of the lever F, to permit interchange of cutting tools in case one is worn out, each cutting tool being held against outward movement in the fork F by a lug F arranged on one of the fork members and engaging a recess G in the cutting tool G, as will be readily understood by reference to Figs. 8 and 9. The rear end of the lever F extends into a longitudinal keyway B formed in the forward end of the sleeve B, so that when the sleeve B is rotated, the lever F is carried along,- and consequently the stock A, to rotate thelatter. The back of the lever F is in the form of a cam surface, so that when the sleeve B is pushed lengthwise over the stock A, then a swinging motion is given to the lever F, to swing the cutting edge G of the cutting tool G outwardly, to engage the wall of the tubular end of the stay bolt I at the inside, with a view to cut the said wall on rotating the stock A and feeding the cutting edge G outwardly. A spring J held in the slot A presses against the inner face of the lever F, so as to hold the same in engagement with the keyway B, and one end of the said spring J rests against the stop plate E, and the other end is adapted to abut against plainly shown in Fig. 2.

In order to hold the sleeve B in an outermost position on the stock A previous to rotating the sleeve, a latch K is provided, fulcrumed at K on the sleeve B (see Fig. 7) and pressed on at its outer end by a spring K to engage the inner end of the said latch with a recess A formed transversely in the stock A and adapted to register with the slot B formed in the sleeve B and containing the latch K at the time the sleeve B is in an outermost position on the stock A, as illustrated in Fig. 2.

The tool is used as follows: WVhen the sleeve B is in the outermost position on the stock A, as shown in Fig. 2, then the lever F is held in its outermost position by the action of the spring J, so that the cutting edge G of the cutting tool G is withdrawn within the forward. end of the recess A, to permit convenient insertion of the reduced end A of the stock A into the drill hole I formed in the stay bolt I. After the end A is inserted in the drill hole 1 then the operator presses the latch K, to disengage the same from the recess A, and then the motor is started, so that its shalt C rotates the sleeve B and the latter, by the lever F engaging the keyway B is carried along and rotates the stock A. The operator now moves the sleeve B with the motor from the left to the right lengthwise on the stock A, so that the lever F is gradually pressed inward by the action of the sliding sleeve B, so that the cutting edge G moves outward and in engagement with the wall of the tubular end of the stay bolt I, to cut an annular groove into the said wall. As the sliding movement of the sleeve B is continued, a gradual outward feeding of the cutting edge G into the the shoulder A arranged on the stock A, as said wall is continued, to finally cut the stay bolt in two a distance inside of the boilersheet I. When this has been done, the motor is stopped and the sleeve G with the motor is caused to slide back on the stock A to its former position, and in doing so the lever F is caused. to swing outward by the action of the spring J, so that the cutting edge G of the cutter G is withdrawn into the slot A. The tool can now be readily pulled out of engagement with the cut-oil outer end of the stay bolt and re-arranged with the drill hole of another stay bolt to repeat the above-described operation.

The cutting machine described, while primarily intended for cutting stay bolts after the same have been provided with drill. holes I as above mentioned, may also be used for other purposes; for instance, for cutting boiler flues inside of the boiler head.

Having thus described my invention, I claim as new and desire to secure by Letters Patent A cutting machine for cutting oil stay bolts and the like, comprising a stock, a lever extending lengthwise in the stock and carrying a lateral cutting tool, a sleeve slidably mounted on the stock and engaging the lever to feed the cutting tool, said sleeve having a longitudinal groove for receiving the lever whereby to lock the stock and the sleeve, and a latch pivoted to the sleeve and engaging the stock for maintaining the sleeve in its outward position.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.




Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4294011 *Jun 18, 1979Oct 13, 1981T/Drill, Inc.Tube cutter
Cooperative ClassificationB23D21/14