US2373535A - Toolholder - Google Patents

Description

April 1o, 1945. l.. BROWN 2,373,535

TOOL HOLDER Filed Sept. 12, 1944 2 Sheets-Sheet l A Jflgl. ^-J1f9.3.

' l .Am-i110, 194s. L, B, BROWN l Y 2,373,535

TooL HOLDER Fil-ed Sept.v 12, 1944 2 Sheets-Sheet 2 Z Brown IN VEN TOR.

Patented Apr. 1o, 1945 UNITED STATE TOIOLHOLDER Louis B. Brown, Duquesne, Pa'. Application September 12, 1944, Serial No. 553,740

. This invention relates to a tool-holder for use on lathes, one of the objects being to provide a device of this character designed to tightly grip and hold a plurality of cutting tools, there being means provided whereby each of the toolsv can be adjusted to any desired angle independently of the other tools in the holder, after which a single clamping means can be utilized whereby all of the held tools will be gripped simultaneously to hold them against accidental displacement `.while in use.

A further object is to provide simple and efcient means for locking the holder in any position to which it might be adjusted on a lathe.

A still vfurther object is to provide a structure of this character which is simple and compact inconstruction, can be adjustedreadily, and can be easily handled.

With the foregoing and other objects in View, which will appear as the description proceeds, the invention consists of certain novel steps in the method and certain details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the method disclosed and in the construction and arrangment of parts without departing from the spirit of the invention as claimed.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings,

Figure 1 is atop plan view.

Figure 2 is a side elevation.

Figure 3 is a section on line 3 3, Figure 2.

Figure 4 is an enlarged section on line 4 4, of Figure 1. y f

Figure 5 isan enlarged section on line 5 5, of Figure 1. I

Referring to the gures by characters of reference, I designates a supporting element, hav'- ing a channel 2 formed with undercut or recessed walls providing side grooves 3.

Channel 2 is designed to receive an adjustable post 4, the head 5 of which is proportioned to extend into the recesses or 'grooves 3. That portion of the post adjacent to the support I is screwthreaded as indicated at 6 Vfor engagement by a plate 1 constitutingv a nut which, when turned in one direction relative to the post, will frictionally channel 2.

Removably mounted on the post 4 is a bottom plate 8 which is of any preferred shape, although in the'present instance it isv square, as shown particularly in Figure 3. Each lside of the plate has a rabbetY 9 in the upper portion thereof and movably mounted within each rahbetis a jaw l0 in the form of lan elongated bar provided, adjacent to each of its ends, with a dowel Il, anchored vas at` I2 in the jaw and extending downwardly through an opening I3 in the bottom plate 8. This opening is counterbored as' at I4 and moveably mounted in the counterbore is the head I 5 Aof the `dowel Il. The two dowelscarried by each jaw adjacent its ends are both loosely mounted within the openings I3 and the Acounterbores I4 provided therefor, so thatthe jaw thus is free to tilt relative to `the plate 8 although held assembled therewith and substantially restrained from longitudinal movement relative thereto.

, Screw threaded openings `I 6 are' provided inl the plate B between, but adjacent to, the "dowels heretofore described and in each of these openings is seated an adjusting screw I1 which can be provided with a socket whereby a suitable wrench can be used for rotating the screw for the purpose of shifting the jaw Ill engaged thereby. Ob-

. viously, by separately adjusting these screws the jaw can be positioned at any desired angle relative to the plate 8. If necessary the holder can be removed from the post 4 to afford access to the adjusting screws I1.

The parts thus far described are duplicated in connection with each of the jaws I0 at the four.

sides of plate 8. I

A top plate I8 -which is, similar in construction to the plate 8, is mounted on the post 4 and is disposed oppositely thereto so that the rabbets I9 in the sides thereof open downwardly toward plate 8. Eachof these rabbets contains a jaw 20 similar to the jaw I0 and each of these jaws has a pair of dowels 2| anchored therein adjacent to its ends, as indicated at 22. The dowels are slidably mounted in openings 23 in the top plate I8 and these openings are counterbored as at 24 to receive the heads '25 on the dowels 2|. Thus these dowels serve to support the jaws 20 againstv separation from the top plate' I8.

Screw threaded openings 2B are provided in the top plate vbetween and adjacent to the dowels associated with each one of the jaws and in each of these `openings is an adjusting screw 21 which, like the screws I'I, is provide-d with an angular socket for the reception of a suitable wrench by which the screw can be turned to press against jaw 20 and maintain it at any predetermined angle while in gripping position.

The two plates 8 and I8 are joined by tie-bolts 28 and that portion of the post 4 extending outwardly beyond the top plate I8 is screw threaded as at 29. A cap 30 is keyed on this extended portion of the post as indicated at 3l so as to rotate with the post While being free to slide relative thereto. A nut 32 engages the threaded portion of the post and by turning the same in one direction the cap 30 can be pressed tightly against the top plate I8 so that the holder can thus be clamped tightlyv on to they plate l. An annular series of recesses is formed in the periphery of the cap 30 and any one of these recesses is designed to receive a spring pressed locking pin 34 slidably mounted in a bracket 35 on plate I8 and having a knob or handle 36 whereby it can readily be withdrawn from the recess 33 against the action of the spring 31 mounted on Vthe pin and holding it normally projected toward or into-the cap 30.

yIn practice the post 4 is adjusted to the position in which it is to be held on the supporting structure I, after which the nut formed by plate l is screwed tightly against the support to hold the post in the position to which it has been moved.

The cutting tools T to be mounted in the holder are placed between the opposed jaws I and 28 and by means of the screws Il and 21, these on post 4 so as to bring any one of the tools into Working position, whereupon pin 34 is released and will snap into the adjacent recess 33, thereby securing the screw against displacement during the cutting operation.

Obviously, tools of different thicknesses and of different types can he held simultaneously within the device and any one o`f them quickly brought into working position, as will be readily seen.

What is claimed is:

l. A tool holder including a post, opposed plates mounted for rotation on the post, each plate having rabbeted edges providing seats, elongated jaws positioned for movement in the respective seats, dowels extended from each jaw and slidably and tiltably mounted in one of the plates, ad-

justing screws in each plate between the dowels engaging one of the jaws, the jaws on the plates being oppositely disposed and positioned to receive cutting tools therebetween, and means separate from the post fordrawing the plates toward each other to simultaneously bind all of the jaws upon the interposed tools.

2. A tool holder including a post, opposed plates mounted for rotation on the post, each plate having rabbeted edges providing seats, elongated jaws are forced against the tools and are brought C to the correct positions for holding the tools atV proper angle relative to the plates 8 and I 8. With the parts thus adjusted and assembled, the tie bolts 28 are tightened and all of the tools thus securely gripped so that they cannot shift relai535 with the cap 30, the entire holder can be rotated f4.0

jaws positioned for movement in the respective seats, dowels extended from each jaw and slidably and tiltably mounted in one of the plates, adjusting screws in each plate between the dowels engaging one of the jaws, the jaws on the p'lates being oppositely disposed and positioned to receive cutting tools therebetween, and means separate from the post for drawing the plates toward each other to simultaneously bind all of the jaws upon the interposed tools, and selective means on the post and one of the plates for locking the plates against rotation when a selected tool is in working position.

LOUIS B. BROWN.

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