US1392960A - Reaming-tool - Google Patents

Description

G. MIZZELL.

REAMING TOOL.

APPLxcATlo N FILED 1AN.18, 1921.

Patented Oct. 11, A1921.

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"A TTORNEYS7 UNITED STATES PATIENTA OF-FICE. y

l GEORGE MIZZELL, 0F NEWPORT NEWS, VIRGINIA, ASSIG-NOR OF ONE-HIJF TO A. T.

2 MERRITT, OF NEWPORT NEWS, VIRGINIA.

REAMING-TOOL.

Application led January 18, 1921.

To all whom 'it may concern:

Be it known that I, GEORGE MizznLL, a citizen of the United States, residing at New ort News, in the county of Warwick land IS)tate.of Virginia, have invented certain new and useful Improvements in Roaming- Tools; 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.

This invention relates to new and useful improvements in rea-ming tools, and' more particularly to a reamer adapted for use in countersinking openings in the shell plates, tanks and other heavy metal plates used in connection with thebuilding of ships, the

main object yof the present invention being the provision of a reaming tool whereby the cutting knife can be arranged in such a position as. to permit the insertion offthe reaming tool within the opening for reaming out the side of the opening opposite the operator, means being provided 'to'arrange the cutting blade in operative position after the tool has been lextended through the opening.

In the reaining out of openin s in tanks and similar structures it genera y requires the services of an operator upon the `inside of the tank, with the tool in use at the present time, this operator onthe inside arranging the cutting blade in position after the tool has been inserted through the opening by the operator upon the opposite side and it is the inain'obje'ct or my invention to provide a reaming tool wherein the knife blade will be normally arranged` within the connes of the tool So that it can be readily inserted through an opening .and then arranged in operative position for `reaming out-the opening upon the side opposite from which the operator is working.

' A further-object of my invention is the provision of new and 'novel Vmeans whereby a single blade cutter can be readily operated to arrange the same within the tool when not in use and again re-arrange the saine to extend the cutting blade to its operative position, and furthermore providing means whereby when pressure is exerted upon the cutting blade', a suitable bearing will be ,provided -ior'tlie blade to release the strain Specification of Letters Patent.

Patented oct. 11, 1921.

Serial No. 438,131.

With the above and other objects in view the invention consists in the novel features of construction, combination and arrangement" of parts hereinafter more fully set forth, pointed out in the claims and shown in the accompanying drawingsy in which:

Figure ,l isa longitudinal sectional view taken through myV improved tool showing othe blade in its operative position, and also illustrating the blade within the contines of the tool in dotted line;

.Figa 2 is a similar View looking in a direc- .tiono,pposite that shown in Fig. 1;

^ be .formed of steel or any other suitable mal terial of this character and is provided at itspouter end with a slotted portion 2 in which the cutting blade 3 is adapted to operate. Extending longitudinally of the body. member l and projecting into thevslotted portion 2 at a central point is the longitudinal opening 4 in which'is adapted to slide the operating rod 5, the outer end of which is pivotally connected to the knife 3 by means of the pivot pin 6. This rod 5 is moved within the' opening e by means of the pin 7 which is connected to the inner end o' the rod 5 in any suitable manner and rlhe outer end of the slotted portion 2 is closed by -means of a cap member 9 which is mounted upon the reduced outer end 10 of the body member l and provided with a cen-l tral reinforced brace member 1 1, said brace member .being disposed in alinement .with the slot 2 so t at when' the cuttingblade 3 is arranged in its operative position as shown in l? ig. l the back 'olf the cutting blade will abut against this brace member 11 and' be securely held in its operative position against the surface being operated upon. The cap member 9 is securely retained in position by means ot the screw `bolt l2 which is extended through the side walls of the cap and through the reduced portion l0 or' sev the body member 1 and the bracing member 11. Thus theseveral parts are securely retained in position and can be quickly and readily removed when it' is desired to insert a new knife blade or *for any otherpurpose of this character.

ln Fig. 1 l have illustrated the cutting blade 3 in an inoperative position in dotted lines and it will be noted that the blade when in this position is entirely within the connes of the body of the tool and does not project beyond the outer surface of the body, but in full lines the blade is illustrated in its operative position and in order to move the blade from one position to the other, a suitable arcuate groove 13 is formed in one face of the slotted portion 2 and the knife blade 3 is provided with a guide pln 14 adapted to operate within this groove so that when the pin 7 is grasped by theoperator for imparting sliding movement "to the rod 5, the knife 3 will be forced inwardly or outwardly according to the movement of the rod and through the movement in either direction, the pin 14 will follow in the groove 13 and when the pin reaches either end of the groove, the knife blade 3 will be either in an operative or an inoperative position. From. this it will be apparent that when the pin 14 is in the outer end of the groove the blade 3 will be disposed in operative position as shown in Fig. 1 in full lines, but when the pin is at the inner end of the groove the blade will be disposed in an inoperative position as shown in dotted lines in Fig. 1. It will be understood that in the construction of various sized tools and blades, the relative positions of the pivot pin 6, the. pin 14 and the groove 13 will be changed accordingly so that when the blade 3 is actuated, through the medium of the operatin rod 5, the guide pin 14 will follow within t e groove 13 and force the blade 3 eitherto an operative or an inoperative position. Particular attention is directed to the actvthat when the blade is in its operative position as shown in Fig. 1, the outer end of the same abuts against the transverse bracing member 11 arranged within the end portion 10 of the body and held in place by the cap 9 so that the force of the cutting of the blade against the work, is directed against'this bracing member and thus removing the strain from the pivot pin 6.

lt will befnoted in Fig. 2 that the operating rod 5- is illustrated in a position eX- tended `suilicient to bring the knife blade 3 to an operative position and that the pin 7 has not reached the inner end of the slot 3 thus leaving suiieient space between the point to' which the pin is arranged in its present position and the end of the slot tol permit the rod 5 to be extendedbeyond the operating end or the tool so that the imite 3 can be removed and a new one inneeaeeo serted. rli"hs operation is carried out by removing the screw bolt 12 so that the cap 9 can be readily removed from the end of the body and permit the blade member 3 to be removed from the slotted portion 2 as the pin 14 can readily pass out the open end of the slot 13 and as the pivot pin 6 1s not secured to the blade 3 in any way, however the blade can be readily removed.

ln order to determine the required depth of countersinking, a suitable scale 15 is arranged upon the outer surface of the body member 1 and in such a position, that the depth of countersinking can be readily noted by the operator when the thickness of the material through which the blade is inserted is taken into consideration.

From the 'abfove description, taken in connection with the accompanying drawings it will be readily apparent that l have provided a simple and durable tool particularly adapted for .reaming out openings, and wherein thetool is especially used on openings where both sides of the openings are to be reamed thus eliminating the necessity of the operator moving from one side of the object to the other or the assistance of a second operator upon the opposite side of the object as the plate 3 can be readily arranged within the tool as shown in dotted lines in Fig. 1, the tool inserted in the opening and the blade 3 moved to an operative position and when the work is finished, the blade 3 can be returned to its inoperative position and the tool withdrawn from the opening. Furthermore, should one of the blades 3 become broken or the operator wish to remove the same for inserting a newblade, the operation can b e quickly and readily carried out. lt will be understood that this tool can be quickly and readily attached in any suitable mannersto the usual machine in use at the present time for operating tools of this character.

I claim:

1. A tool of the class described including a body member havin a longitudinal groove therein and a recessed portion at one end, a rod slidable in the groove, a cutting blade pivotally connected to one end of the rod andnormally -disposed in the recess within the confines of the body of the tool and means for guiding the blade into a transversed position with respect to the tool body upon reciprocation ot the rod.

2. A tool ot the ciass described including a body member having a longitudinal groove therein and recessed at one end, a cutting blade pivotally connected to one end of the rod and normally disposed within the recessed portion within the confines of the body, an arcuate groove in one side wali o the recess, a guide pin carried by the blade and mora, within said arcuate groove whereby upon reciprocating more ment of the rod, the blade will be moved to a transversed position With respect to the body of the tool as and for the purpose set forth. v

3. A tool of the class described including a body, having a recessed portion at one end, a movable cutting blade normally disposed Within the recess and arranged longitudinally of the body, one side Wall of the recess having an arcuate groove, a guide pin carried by the blade and movable Within said groove and means pivotally connected withthe blade for actuating the same whereby the blade may be moved either to a longitudinal or a transverse position with respect to .the

body.

4. A tool of the class described including a body member having one end bifurcated, a cutting blade movably arranged within the bifurcation and means whereby said blade is operated to dispose the same either longitudinally or transversely of the body of the tool, a removable cap member arranged over the bifurcated end of the body and a bearing member arranged Within the cap and adapted to be disposed Within the outer end of the bifurcation to form a bearing for one end of the blade when disposed in a position transversely of the body.

In testimony whereof I affix my signature.

GEORGE MIZZICLL.

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