US1596197A - Metal-cutting tool - Google Patents

Description

Aug. 17 1926;

P. J. LlNDGREN METAL cu'r'rms TOOL Filed April 21. 1924 Patented Aug. 17, 1926.

UNITED STATES [PETER J. LINDGREN,

ATJENT OFFICE.

or DENVER, coLoR-Ano, Assrenoa' roa. w, nonniin, or QDENVER, COLORADO.

METAL-CU TING TOOL.

Application'filed April 21, 1924. Serial No. 707,933.

' An object of this inventionjis to provide improved means for cutting circular holes in metal bodies such as the wallsand ends of tanks and containers;

A further object of this invention is to provide an improved construction for a metal-cutting tool.

A further object of this invention is to provide'im'proved means for retaining a substantially-annular hacksaw in a metalcutting tool.

'A-:turther object of this'invention is to provide means for carrying a drill and a substantially-annular hacksaw in-concentric relation, the respective carrying means being separableand distinct from each other and adapted to be assembled and rigidly joined for use. 7

A further object of this invention is to provide a two-part tool, one part being adapted to carry a hacksaw, the other part being adapted to carry a drill and also to carry the first part, and means for rigidly, yet detachably, connecting said Parts, the hacksaw and the drill for conjunctive use.

A further object of this invention is to provide a two-part tool, one part being adapted to carry a drill and having means for securing the part against rotation relative to the drill, the other part being adapted to carry a substantially-annular hacksaw concentric with the drill and also adapted to be'mounted on the first part and rigidly, yet detachably, secured thereto, the drillretaining means also fixing and determin-- ing relative rotation of the two parts of the tool.

provide a two-part tool, one part being adapted to be mounted rigidly, yet detacl 1-' ably, on and concentric with a drill, sald drill being adapted to be mounted removably in an operating device, the other part of the tool being adapted to be mounted on and concentric with the first part and adapted to carry a substantially-annular ha'cksaw concentric with-said drill, there be ing a common means employed to prevent provide a two-part tool, one part being formed with internal rabbet adapted to receive a substantially-annular hacksaw and also adapted to receive an expansive friction-locking ring within said hacksaw, the other part of the tool being formed with'a cone adapted to bear outwardly on the ring and also'being formed with a neck or shank adapted to pass through the first part and be so locked thereto and to adjust the pressure of the cone on the ring.

A further object of this invention is to provide atwo-part tool, one part being formed with an internal rabbet and a bore centrally of said irabbet, the rabbet being adapted to receive a vsubstantially-annular hacksaw and also adapted to receive an expansive ring within the arc of;and pressing outwardly on said hacksaw,the other part of the tool being formed witha neckor shank adapted to pass through the bore of the first part and also formed with a barrel or hub adapted to fit loosely Within the first part and, also formed with a cone adapted to engage the interior arc ofand outwardly press the expansive ring, and also formed with a radial bore adapted to receive a set screw in turn adapted to engage a drill arrangedaxially of the second part, the first part being formed with a notch, intersecting the rabbet, hacksaw and ring and adapted to receive the set screw, there being means provided 'for locking the parts together. y I

My invention consists in the construction, arrangement and combination of elements hereinafter set vforth, pointed out in the claims and illustrated by drawing, in which'- Figure 1 is an elevation of the complete tool assembled as required for practical use. Figure 2 is a longitudinal section axially of the same, the drill and set screw being shown in full. Figure 3 is a bottom or cutting end view of the complete tool. Figure 4 is a view similar to Figure 3, the inner part of the toolv being removed. Figure 5 is a View similar to Figure 4, the hacksaw and ring being removed. Figure 6 is an elevation of the inner part of the tool removed from the other elements, dotted lines indicating axial and radial bores therein to receive a drill and set screw respectively.

In the construction of the tool as shown the numeral 10 designates an outer part or shell, which is generally cylindrical in form the accompanying [the notch 15.

and: has an integralnut 11 on one end. The interior of the shell part 10 is circular and of .three diameters; being formed with a rabbet 12'at one end, said rabbethaving an oblique or inclined bottom "forming a trough of annular form; the shell also being termed with an intermediate chamber 13 opening at one end through therabbetg and the shell also being formed with a central bore ll .openingfrom the opposite end of the cham- .ber .13.. Anotch 15 is formed in andradialuly ofthe shell.l0 and intersects therabbet .12 andchamber 13. Ahacksaw .16, substan- .tially annular in .form, is mounted in the v.rabbet .12 and, because of inherenttendency .fto expand, bears against the wall ofthe ra'o- .bet, the spaced. ends of the hacksaw providing .a .notch. or passagecoincident .With the notch 15. The toothed margin of the hacksaw is. outermost, being spaced {fromv the adjacentend of the shell 10 a custancegreater ,than any contemplated penetration oft-he saw 1nv a worlpobyecutand. the inner smooth margin, ot. thezhaclzsaw seats in the bottom b =ot thetrough oftherabbet. An expansive spring ring .17, .oreterably .ma-cte of round wire, substantially annular in vtorm, is

.mounted in the trough oft-he rabbet 12 and bears, by spring. pressure, on the mnersun face of the haclrsaw opposite, to and resisted :by the .wallof the rabbet, the spaced ends of .the ringproviding. a passagecoincident ,with

An inner part or core comprises three integralmembers, viz, apbarrel .orhub .18. adapted to lit. loosely in the charm ber 13, a cone .19 at .one end .01 the hub adapted to .enter the .rabbet .12 and bear against. the inner surface-0t. the ring 17, and

a. stem, neck or. shank 20 at the opposite-end of the ':hub..adapt-ed to extend through the centralbore 14L, thetlatter beingthreaded to receive a nut 21. The core is tormedpwith an axial.boreadaptedto receive a drill 22 and also is formed with aradial-boreadapted to receive a set-screw-23,.the latter bore being threaded. -The drill :22 is termed with a flat seat between its. ends and. the inner. end otthe set-screw-23engages said seat .andconnectsthe coreto the drill in respect of :both circumferential and longitudinal movement of either relative to the other. .Theset-screw 23 is relatively long, andis .adaptedtoextend through the.notch;1 5 and through the spaces .betweenthe ends of the hacksaw and of the ring 17 and,,under some circumstances, such as anoverload on the spring ring, said setescrew may beengaged by an end of the hacksaw and: limit circumterential vmovement thereof relative to the shell. Before the nut21 is applied tothe stem 20, .the core, with the, drill. 22.a11d set-- screw23'assembled thereiinmay be inserted in the :shell so that. the set-screw enters the notch 15 and the stem passes, through the bore 14, after which the nut is applied and tightened against theouterend of the shell by a Wrench applied thereto, the shell being held stationary by engaging itin a vise or wrench applied to the nut l l'thereon. Tightening ot the nut 21 draws the cone .19 within and causes it to press outwardly on andexpand the ring 17, thereby apply- ;ing greatpressure to the inner surface of the hacksaw and clamping it firmly,

throughout its length, to the wall otthe rabbetzl2, to. the-end ofpreventingany circumferential movement of the hack'saw relative to the shell; The drill maybe removed and ,replaced, ,or substituted by anvvoth itheu r n in th r from th shell, through manipugation of the setscrew 23.

The asse l d to lmayb emp oyed .i cutting a roundhole in a work object sucitlas a boiler, tank or container, by'applying to the drillan operating device 's uch as a brace ,or boring machine or flexible shaft and .rota ina h tod; a slent rine 1 .109-

par frame-on p b ieena l pt cltoe0 .tain. and car ya ub n l yr nn la bas .saw radi y engag ngh inn iac th reo the other part be ng ad pte o r i a l;v a .drill cen rall of th hackaw, mean betweensaid parts acted on, bynthe 5609116. part :for applying radial pressure .to i said =hacksaw and means for connecting said {frame parts.

, 2. A metal-cutting: tool omprising, a twopart frame, one part being formed with a .rabbet adapted to conta n a substan ia yannular hacksaw, the other part ,rbeing linountedaxially of thefirst part. andiormied .with a cone adapted to apply radial pressure ;to said :hacksaw, the inner part also being adapted to@ contain. a drill, an-d means for connecting said frame parts.

3. A ,metaleioutting. tool comprising a twopart trame,.one part being formed with .an internal .rabbet haying a F t rough in its bottom, a substantially annular hacksiaw mounted in said rabbet and having its v toothed margin spaced from the ,end of the rabbet, anexpansive device,mountedinsaid .ltrough ,andoengaging the inner surtacefof the hacksaw, the other part of the .;:Erame being formed with a coneadaptedtoengage and expand said 1 device, means tonconneca ing said frame parts, and a drill mounted and apply radial pressure to said hack-saw,

and also formed with a central bore and a radial bore intersecting the central bore, means for connecting said frame parts and separate cutting devices mounted on the respective frame parts.

5. A metal-cutting tool comprising a twopart frame, one part being formed as a shell and the other part as a core, adapted to enter the shell and having a stem extending through the opposite end of the shell, a sub stantially-annular hacksaw mounted in the shell, a retaining ring mounted within and expansively engaging said hacksaw, the core having a part adapted to expansively engage said ring, a drill mounted in the core axially of the hacksaw and projecting therefrom at both ends, and a nut adapted to be mounted on said stem and adapted to engage the adjacent end of the shell.

6. In a metal-cutting tool, a shell, a substantially-annular hacksaw mounted loosely in and projecting from one end of said shell, a core removably mounted through said shell and adapted to apply outward pressure to said hacksaw, said shell being formed with a radial notch, said core being formed with a central bore and also formed with a radial bore intersecting said central bore and intersecting said notch, a drill removably and replaceably mounted in the central bore of the core and a set-screw mounted in said radial bore of the core and traversing said notch.

7 In a metal-cutting tool, a shell, a' substantially-annular haAcksa-w mounted in and projecting from one end of said shell, an open ring mounted within said hacksaw, a core mounted through said shell and formed with an expanding face adapted to engage said open ring, said core also being formed with a central bore and a radial bore intersecting it, said shellbeing formed with a radial notch registering with the radial bore, the spaces between the ends of the saw and between the ends of the open ring registering with said notch, a drill mounted in the central bore and a set screw mounted in the radial bore and extending through the saw and ring spaces, together with means for connecting said shell and bore.

8. A metal-cutting tool comprising a twopart frame, one part being formed with an internal rabbet, a substantially-annular hack-saw mounted in said rabbet, an expan sive device mounted in said rabbet and 7 PETER J. LINDGREN.

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