US1220597A - Marker for lathes and the like. - Google Patents

Description

R F. BRACKE.

MARKER FOR LATHES AND THE LIKE.

APPLICATION FILED MAY 3. 1915.

1,220,597., Patented Mar. 27, 1917.

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R. F. BRACKE.

MARKER FOR LATHES AND THE LIKE.

APPLICATION FILED MAY 3, 1915.

1,220,597. Patented Mar. 27, 1917.

2 SHEETS-SHEET 2- A, if E TED TAETES PATENT @FFIQE ROBERT F. BRACKE, OF CHICAGO, ILLINOI$, AQSIGNCE OF ONE-THIRD TO ALBERT G. IVIGCALEB AND ONE-THIRD TO ALBIN C. AI-ILIBERG, BOTH OF CHICAGO, ILLINOIS.

MARKER FOR LATI-IES AND THE LIKE. v

Specification of Letters Patent. Patented lVIEtl. 27, 1917.

Application filed May 3, 1915. Serial No. 25,421.

To all whom it may concern:

Be it known that I, ROBERT F. BRACKE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Markers for Lathes and the like, of which the following is a full, clear, concise, and eXact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to markers for lathes and the like, and has for its object the provision of a device of this class which can be economically manufactured; one which is thoroughly accurate in its operation; one which can be easily and quickly handled or operated by the workman, and which is compact in construction.

The device of my invention is adaptedfor use particularly in connection with lathes, although its use need not be so limited. Generally, the device consists of a marking tool arranged to be carried when used in connection with a lathe, by the tool post of the same. The tool post, as is well known in the art, is mounted upon the lathe carriage which is arranged to be moved on the bed of the lathe ina longitudinal or transverse direction by the manipulation of suitable handles or cranks usually provided on the front face of the carriage apron. By this arrangement, it will readily be seen that the tool post and thus the marker carried thereby, can be adjusted to any desired position to effect the marking of the work. To determine the position of the marker from some point or position on the work, I provide a scale graduated into inches or centimeters slidably mounted on the marker carried by the tool post. This scale is preferably provided with an inwardly extending projection, which is arranged to engage the face of the work to be marked, as for instance the end face adjacent the tail stock, when the lathe is set to hold a piece of work upon the head stock spindle and the tail stock spindle. The scale is preferably frictionally held in the marker so that it will be retained in any position to which it may be moved.

In effecting the marking of a plece of work, the work may be supported by the lathe spindles in the usual manner and the marker inserted into the tool post. The

scale projection above referred to is then moved into engagement with one of the edges of the work, and the tool marker per so moved in a direction away from the projBCt-IOH until the same assumes a position where it is desired to effect the marking. This position is determined by the graduations carried by the scale and anindeX, carried by the tool marker; the movement of the marker, of course, being effected by the longitudinal hand feed provided on the carriage. After the marker has been thus positioned, the same is caused to engage the work by operating the cross feed handle of the apron to cause engagement of the cutting or marking edge of the marker with the work. The work may then be rotated by hand to produce the marking, or a driving dog may be fixed upon the same and connection, made with the head stock spindle if power is to be utilized for rotating it.

The marker of my invention is arranged so that it may be inserted into any standard tool post, and is held similar to the manner of holding any of the usual cutting tools.

The marker is arranged so that it may be used in a longitudinal direction, as for instance when the work is held by the head and tail stock spindles, or may be used in connection with a piece of work which is ,held by the head stock spindle alone, .as for instance when a chuck is used; as will be hereinafter pointed out.

In the modification hereinafter referred to, I provide a scale similar to the scale used in the preferred embodiment of my invention, provided with a frictionally held abutment arranged to cooperate with any one of the cutting tools employed for cutting the work, and thus eliminate the use of a special marker. The operation of this modified construction is similar in all'manners to the device above referred to, in that the movement of the same is controlled both longitudinally and transversely of the lathe bed, by the carriage hand feeds.

My invention will be more clearly understood by referring to the accompanying drawings in which Figure 1 is a perspective view of a standard lathe provided with the marker of my invention. The marker is here illustrated positioned in the tool post, which is controlled by the carriage hand feeds.

Fig. 2 is a perspective view of the marker.

Fig. 3 is a plan view of the device of my invention shown in position for operation, the work being here illustrated mounted upon the head and tail stock spindles.

Fig. 4 is a plan view of a portion of the head stock and a chuck carried thereby. The marker illustrated in this figure is slightly modified, although the marker illustrated in Figs. 1 to 3 inclusive may here be used.

Fig. 5 is a perspective view of the end projection of a modified form of scale which 7 may be employed.

Fig. 6 is another modified form of marker wherein a special marking tool is dispensed with, and

Fig. 7 is a perspective view of the abut ment member used ilrconiiection with the device illustrated in Fig. (3.

Similar reference characters refer to similar parts throughout the several views.

Referring first to Fig. 1, I have illustrated at 8 a lathe bed upon which is mounted the head stock 9 and the tail stock 10. The head and tail stocks are provided with the usual spindles 11 and 12 respectively. The head stock is provided with the usual pulleys, whereby power may be transmitted to the lathe. Connected by means of suitable gearing or belting to the shaft of the pulleys carried by the head stock, are the feed rod 13 and the lead screw 14. These, as is well known in the art, are arranged to be connected to the carriage 15 slidably mounted on the bed of the lathe. Slidably mounted on the upper surface of the carriage 15 is the cross feed 16, upon which is mounted the tool post 17. This tool post carries the usual handle 18 to facilitate the clamping and holding of the cutting tools. In the particular kind of lathe here illustrated, the movement of the cross feed 16 is controlled by the hand crank 19 and a secondary crank 20, movement of either one causing relative movement between the cross feed and the carriage. In addition to means for connecting the carriage to the lead screw and feed rod, the carriage is provided with a longitudinal hand feed crank or wheel 21 arranged when operated to cause longitudinal movement of the carriage. Rotation of the hand wheel 21 is transmitted to gearing contained within the carriage which mesh with a gear rack'illustrated at 22. It will be seen therefore, that the position of the tool post 17 is controlled by the hand feeds 19, 20 and 21. v

1 Fig. 2 illustrates the marker of my invention which consists of a squared portion 23 arranged to be inserted into the slot provided in the tool post. The forward end of the marker carries a cutting edge 24 which registers with an index 25 provided on the upper face of the marker. 26 illustrates a rectangular bore in which is slidably mounted the scale 27. A spring is illustrated at 28 connected to one wall of the bore, for frictionally holding the scale in any position to which it may be moved. The index 25 as illustrated, is positioned adjacent the opening 27, which permits the scale graduations to be set to register with the index. One end of the scale 27 carries a projection 29,

adapted to engage some portion of the work,

is for instance, the end face as illustrated in The operation of the device thus far described is as follows :Let us assume that it is desired to mark the work at the points illustrated at a, Z), 0, CZ, e and f. The marker 23 is first inserted into the tool post and se cuirely held therein by manipulating V the handle 18 to cause engagement of the screw threaded post with the marker. The scale 27 is inserted into the bore 26 carried by the marker, and the tool post is moved by means of the hand feed control 21 to the extreme right hand end of the work illustrated in Fig. 3. The projection 29 is then moved into engagement with the right hand end face of the work as illustrated in this figure.

After the scale is thus positioned, movement of the same is prevented toward the head stock 9. Since the point a is one half an inch away from the right handend of the work, the hand feed 21 is turned until the index 25 registers with the one half inch mark of the scale 27. Since the cutting edge 24 registers with the index, the cutting edge will therefore be positioned one half inch away from the right hand end of the work. The position of the marker is therefore set. To effect the marking upon the work, the transverse or cross hand feed 19 or 20 is then operated to cause engagement of the marking edge at with the work. After this engagement is had, the work is caused to rotate, either by hand or by power. When power is used, the usual dog 30 is fixed on to the work and connection made with the head stock spindle 11. After the mark a has been made, the tool post is moved away from the same by operating the transverse hand feed,,whereupon movement of the tool post toward the head stock may be again caused by the hand feed 21 until the marker is in position to effect the marking illustrated at b. This operation is continued until the workis marked at all the positions indicated.

The scale 27 is preferably provided with divisions on both sides so that the same may be inverted and the projection, 29' placed on the'head stock side of the work. After the scale is thus positioned, the tool post 17 and thus the marker is moved in the opposite direction to'effect the variousmarkings. It will readily be seen that the tool post may be moved toward theprojection 29 0f the scale if suitable connection is'made between the scale and work, or some portion of the lathe. This particular connection can of course, be easily made, and I have therefore thought it unnecessary to illustrate.

In Fig. 4 I have illustrated a chuck for holding the work shown at 31, in the form of a disk. The tool post carries the marker which slidably supports the scale 27*. The marker here shown is slightly modified, in that it carries an index projection 32 arranged to cooperate with the divisions car ried by the scale. The cutting or marking edge 33 is positioned adjacent the index 32 so as to register therewith. The projection 29 is arranged to abut against the end of the work 31 and the position of the marker determined by the divisions carried by the scale.

In order to eflect positive engagement of the projection of the scale with the work, at a point farthest away from the center thereof, the projection may be provided with a vertically extending arm 34: illustrated in Fig. 5. It will readily be seen that this is accomplished by means of the vertically extending arm whether the scale is positioned above or below the center of the head stock spindle. The scale of course, may here also be provided with divisions on both sides so that the projection may be arranged to engage either the front or rear edge of the work. The dotted lines illustrated in Fig. 4 show the marker positioned for operation when it is desired to have the projection engage the front edge of the work.

Figs. 6 and 7 illustrate a marker in which the special cutting tool is dispensed with. In this figure the scale is illustrated at 27 and the projection at 29 The scale 27 is slidably mounted in an abutment member 35 which carries a spring 36 to cause frictional engagement between the member and the scale. As most clearly illustrated in Fig. 7, the member 35 is provided with a downward projection 37 which serves as an abutment arranged when in position for operation to engage the side face of a cutting tool 38. This cutting tool may be any one of the many kinds of cutting tools employed. In this figure I have illustrated a round nose tool. The graduations carried by the scale are preferably positioned as illustrated on the upper edge so that the position of the cutting tool relative to the graduations may easily be determined. The operationof the device illustrated 1n these figures will readily be apparent. By moving the tool post 17 movement of the abutment member 35 is also caused. This member 35 serves merely to hold the scale upon the cutting tool.

Having thus described my invention what I claim is 1. A lathe tool comprising in combination with a lathe and tool post therefor of a marker carried by the tool post, and a straight scale slidably supported from the marker and extending horizontally therefrom along the edge of the work to be marked to designate the position of the marker relative to a point on the work located horizontally away from the marker.

2. A lathe tool comprising in combination with a lathe and tool post therefor of a marker carried by the tool post, a straight scale slidably supported from the marker and extending horizontally therefrom along the edge of the work to be marked and a projection carried at one end of the scale arranged to engage one of the end faces of the work located horizontally away from the marker to designate the position of the marker relative to the engaged end face of the work 3. A lathe tool comprising in combination with a lathe and tool post therefor of a marker, and a straight scale having sliding connection with the marker and extending horizontally along the edge of the work to be marked to designate the position of the marker relative to a point on the work located horizontally away from the marker, and devices for connecting one of said elements with the tool post.

4:. A lathe tool comprising in combination with a lathe and a tool post therefor, a marker and a straight scale both supported by the tool post and slidable one with respect to the other, said scale being supported in a plane parallel to the plane in which the tool post operates and extending along the edge of the work to be marked to designate the position of the marker relative to a point on the work located away from said marker.

In witness whereof, I hereunto subscribe my name this first day of May, A. D. 1915.

ROBERT F. BRACKE.

Witnesses:

A. G. MGCALEB, C. C. BRADBU'RY.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents, Washington, D. G.

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