US2287601A

US2287601A - Scriber

Info

Publication number: US2287601A
Application number: US366454A
Authority: US
Inventors: George H Callaghan
Original assignee: Individual
Current assignee: Individual
Priority date: 1940-11-20
Filing date: 1940-11-20
Publication date: 1942-06-23
Anticipated expiration: 1959-06-23

Description

Jfine 23, 1942. H. CALLAGHAN Q 2,287,501

SCRIBER Original Filed April 1], 1938 2 Sheets-Sheet l mew/2b Hfal/qarz June 23, 1942.

e. H. CALLAGHAN 2,287,601

SCRIBER Original Filed April 11', 1938 2 Sheets-Sheet 2 Patented June 23, 1942 g 7 UNITED STATES SCRIBER George H. Callaghan, Chicago, Ill.

Continuation of application Serial No. 201,270, April 11, 1938. This application November 20, 1940, Serial No. 366,454

8 Claims.

The present invention relates generally to scribers. More particularly the invention relates to that type of scriber which is designed for use in scribing or scoring linoleum type material so that the latter may be cut by a knife or like sharp edged tool in connection with laying or application thereof.

One object of the invention is to provide a scriber of this type which because of its specific design is so adjustable and manipulable that it is capable of making substantially all conventional types of scribes or scores.

Another object of the invention is to provide a scriber which eflficiently and effectively serves its intended purpose and may be manufactured at a low and reasonable cost.

A further object of the invention is to provide a scriber which is an improvement upon previously designed tools or scribers for the same purpose and comprises as the main parts thereof a bar having a transversely extending set screw retained needle at one end thereof and a block which is mounted for sliding movement longitudinally of the bar and embodies means for releasably and adjustably holding a second scribing needle and in addition an arm which is disposed under and parallel to the bar and has a rounded or cylindrical guide element at its outer end and also a longitudinal centrally disposed slot for the needle on the bar. 7

Other objects of the invention and the various advantages and characteristics of the present scriber will be apparent from a consideration of the following detailed description.

The invention consists in the several novel features which are hereinafter set forth and are more particularly defined by claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference denote corresponding parts throughout the several views:

Figure 1 is a perspective view of a scriber embodying one form of the invention; 7

Figure 2 is a front view of the scriber of Figure 1;

Figure 3 is a vertical transverse sectional view taken on the line 3-3. of Figure 1 and illustrating in detail the construction of the slide block and the manner in which the latter is slidably mounted on the bar and also illustrating the manner in which the second scribing needle is releasably and adjustably retained by the block when such needle is used in connection with the scriber;

Figure 4 is a fragmentary perspective view showing a piece or layer of linoleum type material on a floor and with one edge thereof in abutment with the wall baseboard and illustrating how the scriber of Figure 1 is usable when it is desired to score the piece in connection with the application of a border strip around the margin thereof.

I Figure 5 is a fragmentary perspective View showing a piece of linoleum type material on a floor and with one edge thereof in abutment with the baseboard of a Wall and exhibiting the manner in which the scriber is usable when it is desired to scribe or score the piece with both scribing needles in connection with the application of a border strip inwardly of the margin of said piece;

Figure 6 is a view partly in section and partly in side elevation showing on a floor a pair of pieces of linoleum type material with lapped margins and illustrating the manner in which the scriber is usable to apply a scribe or score to the overlapping margin in connection with cutting of said margin in order to produce an acceptableseam between the two pieces of linoleum typematerial in connection with laying or application of the pieces with respect to the floor;.

Figure '7 isa fragmentary perspective showing a tablewith a piece of linoleum type material on the top thereof and illustrating how the scriber of Figure I is usable to score the margins of the piece when it is desired to trim or cut the marginal portions of the piece in order to-make the edges of the piece flush with the edges of the table top;

Figure 8 is a fragmentary side elevation of a scriber embodying a second or modified form of the invention, illustrating in detail the precise manner in which such scriber is usable; and

Figure 9 is a fragmentary perspective view of the scriber of Figure 8. v

The scriber which is shown in Figures 1 to 7, inclusive, constitutes one form or embodiment of the invention. It is adapted for scribing or scoring linoleum type material in connection with laying or application of the latter, as hereinafter described, and comprises as the main parts thereof an elongated bar l2, a side block l3, and and arm I4.

The bar 12 is substantially square in cross section and is preferably formed of metal so that it is rigid. A scribing needle I5 is carried by and extends transversely with respect to one end of the bar, as shown in Figure 1 and serves as a scribing or scorin'g'mediumin connection with certain uses' of the scriber. This needle is pref erably in the form of a steel phonograph needle and has one end thereof tapered to a sharp point for scribing purposes. The other end of the needle I5 is substantially cylindrical and fits slidably in a transverse bore H5 in said one end of the bar l2. The needle is slidable transversely of the bar for adjustment purposes and is releasably held in its various adjusted positions by means of a set screw II. The latter extends through a hole I8 which is internally threaded and extends between and intersects the bor I6 and the adjacent end face of the bar I2. When the set screw is loosened or withdrawn from the internally threaded hole I8 the needle I may be shifted or slid transversely of the bar in order to space the point thereof any desired distance from the bar. After the desired or proper adjustment of the needle the set screw is adapted to be tightened in order fixedly to secure the needle I5 with respect to the bar.

The slide block I3, like the bar I2, is preferably formed of metal. It is mounted on the bar so that it is slidable from one end of the latter to the other and is composed of a U-shaped piece I9 and a strip 20. The U-shaped piece I9 comprises a cross-Wall 2| and a pair of side walls 22. Said side walls are formed integrally with and project in the same direction from the side margins of the cross-wall 2|. The strip 29 fits between and extends lengthwise of the free side margins of the side walls 22, that is, the margins which are remotely disposed with respect to the cross-wall 2|. It is secured in fixed relation with the U-shaped piece I9 by way of a pair of pins 23 and forms with such side walls and the cross-wall 2| a slideway 24 for the bar I2. This slideway is substantially the same as the bar as far as cross-sectional shape is concerned and permits of relative longitudinal sliding movement of the bar and slide block. The pins 23 extend through and. are in drive fit relation with registering holes in the strip 20 and the side walls 22 of the U-shaped piece I9. The slide block I3 is releasably secured in the various positions into which it is slid or adjusted by means of a set screw 25. This screw, as shown in Figures 1 and 3, extends through an internally threaded hole 26 in the cross-wall 2| of the U-shaped piece I9 and has a wing type outer end 21 for gripping purposes. When the set screw 25 is loosened or unscrewed the block I3 is released and the slide bar and block are thus capable of being slid one relatively to the other. The end of the strip 20 which faces in the direction of the scribing needle I5 projects beyond the adjacent end face of the U-shaped piece I9 of the block I3 and forms a guide element 28 for the scriber. This element is substantially semi-cylindrical as far as conformation is concerned and is adapted. as hereinafter described, to be brought into engagement with an edge of a linoleum type piece When the scriber is used to scribe or score such piece in connection with the cutting of a strip therefrom. A slight distance inwardly of the guide element 28 the strip 20 of the slide block I3 is provided with a transversely extending bore 29 for a second scribing needle 39. This bore extends parallel to the side walls 22 of the U- shaped piece I9 and is in transverse alignment with the scribing needle I5. The needle 3|! is preferably of the same type and design as the needle I5 and the cylindrical end thereof is adapted to be releasably held in the bore 29 by a set screw 3| which, as shown in Figure 3 of the drawings, extends through aligned internally threaded holes in the strip 23 and one of the side walls 22 of the U-shaped piece of the slide block. When the needle 33 is in its operative position the point thereof extends in the same direction as the point of the scribing needle I5. When the set screw 3| is loosened or released the needle 30 may either be removed from the bore 29 or it may be shifted longitudinally into any desired adjusted position.

The arm I4 is formed of a fiat metallic strip and extends parallel to the bar I2. It is approximately half as long as the bar I2 and one end thereof fits flatly against and is suitably secured to the outer face of the elongated strip 29 of the slide block I3. The other or outer end of the arm is disposed in opposed relation with the needle carrying end of the bar I2 and has a longitudinally extending centrally disposed slot 32 through which the pointed end of the scribing needle I5 projects. As shown, this slot extends from the guide element 28 to a point slightly inwards of the outer end of the arm I4. The elongated strip 20 of the slide block serves to space the arm from the bar I2 a sufficient distance to permit linoleum type material of conventional or standard thickness to be inserted therebetween. The arm I I ,is preferably the same in width as the U-shaped piece I9 of the slide block I3 and its inner end edge is flush with the adjacent end edge of the slide block I3. The slot 32 accommodates the scribing needle I5 in connection with relative sliding movement of the bar I2 and the slide block I3. The extreme outer end of the arm I4 is tapered 0r wedgeshaped, as shown in Figure 1, and embodies at the tip thereof a rounded or cylindrical guide element 33. This element extends transversely with respect to the arm and is located or disposed on what may be termed the under face of the arm. It projects in the same direction as the pointed ends of the scoring needles I5 and 30 and serves in several capacities in connection with use of the scriber.

The scriber of Figures 1 to 7, inclusive, has many capabilities of use and is adapted to make substantially all conventional types of scribes or scores. V

Figure 4 shows a piece Pv of linoleum type material on a floor F with one edge thereof in abutment with the baseboard B of a wall W, and illustrates the manner in which the scriber is usable when it is desired to score the piece in connection with the application of a border strip around the margin thereof. In connection with this specific use of the scriber the set screw 25 is loosened and the bar and block are slid relatively to one another until the scribing needle I5 is spaced from the guide element 33 a distance corresponding to the desired width of the border strip. After proper adjustment, the set screw 25 is tightened so as to lock the slide block and bar in fixed relation. Thereafter the scribing needle I5 is adjusted or set sothat the point thereof projects slightly beneath the bottom face of the guide element 33. In the use of the scriber under consideration, the second scribing needle 29 is not used. In using the scriber the bar I2 is positioned perpendicular or normal to the baseboard B and is shifted or manipulated so as to bring the guide element 33 into abutment with the lower margin of the board. When the guide element is so positioned and the pointed end of the scribing needle I5 is in engagement with the top face of the piece P such needle is disposed from the baseboard B a distance corresponding to the width of theborder strip. After the aforementioned steps the scriber is shifted sidewise with the guide element 33 at all times in abutment with the baseboard B. During such shift or movement of the scriber the needle I5 causes a scribe S in the top face of the piece P. After completion of the scribe the piece P is out along the scribe and the. strip which is outwardly of the latter is removed and the de'-' sired border strip inserted and mounted in place. By adjusting the slide block and bar relatively to one another so as to move the scoring needle I either towards or away from the element I5 the scriber may be set so as to make border strip scribes of any desired width.

Figure 5 shows a piece P of linoleleum type material on a floor F with one edge thereof in abutment with the base portion of a wall W and shows or exhibits the manner in which the scriber is usable when it is desired to scribe the piece P in connection with the application of an inset border strip inwardly of the edge of such piece. In connection with this specific use of the scriber, the needle 30 is first inserted into the bore 29 and is adjusted and set in such manner that the pointed end thereof projects a slight distance beneath the bottom face' of the rounded or cylindrical guide element 33. Thereafter the slide block and bar I2 are slidably adjusted with respect to one another so as to position the scribing needle 25 at the desired distance from the needle 30. After proper setting of the two needles the scriber is placed on the margin of the piece P in such manner that the bar and arm extend perpendicularly to the wall W and the guide element 33 is in abutment with the base portion of such wall. After proper positioning or manipulation, the scriber is moved transversely or laterally while the element 33 is at all times in abutment with the wall W. During such shift the needles I5 and 30 form scores S and SS in the top face of the piece P of the linoleum type material. These two scores are spaced equidistantly apart and are in parallel relation with the wall W. At the conclusion of the scoring operation the piece P is out along the scores S and SS" and the intermediate strip is removed and the desired border strip is substituted therefor.

Figure 6 of the drawings shows a floor F with a piece P" of linoleum type material on the floor and a second piece of linoleum type material PP with one margin thereof. in overlapped relation with the margin of the piece P" and illustrates the manner in which the scriber is usable to apply a scribe or score to the over"- lapping margin of the piece PP in connection with cutting of such margin in order to produce an even seam between the two pieces in connection with laying or application of the pieces with respect to the floor F". In connection with this specific use of the scriber the second scribing needle 30 is removed and the bar I2 is manipulated into a position wherein the scribing needle I5 is disposed over and in alignment with the inner portion of the guide element 33. Such needle I5 is adjusted or set so that the point thereof spaced from the top face of the arm M a distance slightly less than the thickness of the piece PP" of linoleum type maerial. After the foregoing manipulation or adjustment; the scriber is placed in the position shown in Figure 6. In such a position the arm I l overlies the lapped margin of the piece P and the inner portion of the guide element 33 abuts against the edge of such margin. As soon as the scriber is in proper position it is shifted laterally, that is, in a sidewise manner and during such shift the needle I5 makes a scribe in the top face of the piece PP" of linoleum type material. Because of the action of the scriber, such score is in exact alignment with the edge of the lapped margin of the piece P. At the COIICIHSIODzOf the scoring operation the piece P is out along the score by way of a knife or. any other sharp'edged instrument. Upon: removal of the severed, marginal part or portion the piece PP" is pressedagainst the floor F into a position wherein the edge thereof is in abutment with the contiguous edge of the piece P. By properly using the scriber it is possible to make a perfect seam between the two pieces P and PP".

Figure 7 shows a table T with a piece P on the top thereof and shows the manner in which the scriber is usable to score the margins of the piece in connection with trimming or cutting of the piece to fit the table top. In connection with the specific use of the scriber under consideration the bar I2 is adjusted or shifted so as to position the scribing needle I5 in alignment with the outer portion of the guide element 33 and is then set by tightening the screw 25. The needle I5 is thereafter adjusted or set so that the point thereof is disposed over the arm I4 a distance slightly less than the thickness of the piece P' of linoleum type material. After proper setting, the scriberis manipulated so as to bring the needle carrying end of the bar I2 and the outer or projecting end of the arm I4 in straddled relation with one of the projecting margins of the piece PP'. Thereafter the scriber is shifted inwards until it is arrested by abutment of the guide element 33 with the adjacent edge of the table top. At the conclusion of this step the scriber'is shifted sidewise and as the result of the action of the scribing needle I5 produces or forms a scribe S in the top face of the piece P. This scribe is in the same plane as the subjacent edge of the table top and forms a guide line for the knife or other instrument which is used to sever the projecting marginal portion of the piece P.

The scriber is capable of being used in ways other than those illustrated in Figures 4, 5, 6 and '7. For example, if it is desired to cut a border strip of uniform width from a straight edged piece of linoleum or like material the scribing needle by way of a relative adjustment of the bar I2 and the slide block is positioned from the guide element 28 a distance equal to the desired width for the strip. Thereafter the scriber is positioned so that the needle equipped end of the bar and the projecting end of the arm arein straddled relation with the margin of the linoleum piece and is then shifted inwards in order to bring the guide element 28 into abutment with the adjacent edge of the piece. When the scriber is maintained in such position and is shifted laterally or sidewise the needle I5 serves to make a scribe or score in the piece at a fixed or uniform distance from the adjacent edge of the piece. By cutting the linoleum piece along the score a strip of uniform width is obtained. If it is desired to make a scribe a comparatively great distance from a wall the bar I2 is reversed. Because the scriber has provision for retaining in spaced relation two scribing needles it is possible to make circular scribes or scores with the scriber when desired. To make a circular scribe the needle 30 is used as a center point and the needle I5 after adjustment the proper or desired distance from the needle 30 is swung around the latter in such manner as to make a score on the face of the linoleum type material. The scriber of Figures 1 to '7 inclusive, is simple in design and hence may be manufactured at a low and reasonable cost. It

is so designed that it may be used expeditiously and efficiently and effectively fulfills its intended purpose. By having the

guide elements

28 and 33 rounded as far as conformation is concerned they roll or slide readily when in use.

The scriber which is shown in Figures 8 and 9 of the drawings constitutes another form or embodiment of the invention. It comprises a bar 2l2, a slide block 213 and an arm 2M and with the exception of the arm is the same in design and construction as the scriber of Figures 1 to '7, inclusive. The bar 2i2 carries at the operating end thereof a scribing needle 2I5. This needle extends transversely of the bar and is axially or longitudinally adjustable. The arm M4 is fixedly secured to the outer or under face of the elongated strip of the slide block 2l3 and is like the arm I l of the scriber of Figure 1 except that the outer extremity thereof is bent or doubled back to form a hook 214*. This hook is provided at its extremity with a rounded or cylindrical guide element 233. The latter extends in the same direction as the scribing needle 215 and with respect to function and operation is analagous or similar to the element 33 of the Figure 1 scriber. The arm 214 is provided with a centrally disposed longitudinally extending slot 232 which is adapted to receive the point of the needle M5 and extends from the slide block 213 to the bend of the hook 2W. The scriber of Figures 8 and 9 is adapted primarily for use in scoring the upper margin of a linoleum type piece P" in connection with the application of the piece to a wall W having a previously applied linoleum type border strip or piece PP" along the upper portion thereof. In using the scriber of Figures 8 and 9 in the capacity just mentioned the bar 212 and the slide block 2|3 are relatively adjusted or set so as to bring the scribing needle 2 l 5 into alignment with the outer portion of the guide element 233. Thereafter the hook 2H1 at the outer end of the arm H4 is hooked around the upper margin of the piece P"" and the scriber is then raised in order to bring the outer portion of the element 233 into abutment or engagement with the lower edge of the piece PP"". After such procedure the scriber is shifted sidewise or laterally in order to form a scribe which is in direct alignment with the bottom edge of the piece P". When the piece PP"" is cut on this scribe and the scrap removed from it, the upper edge of the piece P"" will fit flatly against the bottom edge of the piece PP" and form an acceptable seam. The scriber of Figures 8 and 9 is adapted for use in certain scribing work which cannot be easily accomplished by the scriber of Figures 1 to 7, inclusive. The guide element 233 is provided at its inner end with an externally threaded stem (not shown). This stem is adapted to fit in any one of a group or set of internally threaded holes 233 in the inwardly extending portion of the hook portion of the arm 2M. The holes coact with the stem to form an adjustable connection whereby the element 233 may be secured releasably in different adjusted positions with respect to the hook. In some instances it is necessary to have the element disposed near the bend of the hook. In such cases it is only necessary to unscrew the element and then mount it in fixed relation with any desired hole by screwing the stem thereof into such hole.

The invention is not to be understood as restricted to the details set forth, since these may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention.

This application is a continuation of an application for Letters Patent filed by me on April 11, 1938, Serial No. 201,270.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is:

1. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated bar having at one end thereof a transversely extending scribing needle adjustable in the direction of its length and having the point thereof projecting beyond one side face of the bar, a tubular slide block mounted on the bar for sliding movement longitudinally of the latter and provided with means for releasably securing it in the various positions into which it is slid, and an elongated comparatively narrow arm positioned in opposed relation with, and spaced a short distance from, said one side face of the bar and having one of its ends fixedly connected to the block so that it is bodily slidable with the latter relatively to the bar and having the other end thereof opposite said one end of the bar and provided with a centrally disposed longitudinal closed ended slot through which the point of the nee- -dle extends and also provided with a single laterally disposed cylindrical guide element adjacent its outer extremity projecting in the same direction as the point of the needle.

2. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated bar having at one end thereof a transversely extending scribing needle adjustable in the direction of its length and having the point thereof projecting beyond one side face of the bar, a tubular slide block mounted on the bar for sliding movement longitudinally of the latter and provided with means for releasably and adjustably holding a second scribing needle in parallel relation with the first mentioned needle and with the point projecting in the same direction as the point of said first mentioned needle so that said needles may simultaneously perform their scribing function, and an elongated comparatively narrow arm positioned in opposed relation with, and spaced a short distance from, said one side face of the bar and having one of its ends fixedly connected to the block so that it is bodily slidable with the latter relatively to the bar and provided with a hole therein through which the point of the second needle projects and having the other end thereof opposite said one end of the bar and provided with a longitudinal centrally disposed closed ended slot through which said first mentioned needle extends and also provided with a cylindrical or disc-like guide element adjacent its outer extremity projecting in the same direction as the point of said first mentioned needle and adapted to guide the scriber in connection with sidewise movement thereof.

3. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated bar having at one end thereof a transversely extending scribing needle adjustable in the direction of its length and having the point thereof projecting beyond one side face of the bar, an

elongated tubular slide block mounted on the bar for sliding movement longitudinally of the latter and provided at the end thereof that faces said one end of the bar and outwardly of said one face with a substantially semi-cylindrical guide element, and an arm positioned in opposed relation with, and spaced a short distance from, said one side face of the bar and having one of its ends fixedly connected to the block so that it is bodily shiftable with the latter relatively to the bar and having its other end opposite said one end of the bar and provided with a centrally disposed longitudinal closed ended slot extending from the outer extremity of said other end of the arm to a point directly in front of the guide element and adapted to receive the point of the needle, and also provided with a laterally disposed guide element adjacent its outer extremity projecting in the same direction as the point of the needle,

4. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated bar having a tone end thereof a transversely extending scribing needle adjustable in the direction of its length and having the point thereof projecting beyond one side face of the bar, an elongated tubular slide blocks mounted on the bar for sliding movement longitudinally of the latter and provided at the end thereof that faces the needle and outwardly of said sidle face with a rounded guide element and in adition with means for holding a second scribing needle in parallel relation with the first mentioned needleand with the point thereof projecting in the same direction as the point of said first mentioned needle, and an elongated arm positioned in opposed relation with, and spaced a short distance from, said one side face of the bar and having one of its ends connected fixedly to the block so that it is bodily shiftable with the latter relatively to the bar and provided with a hole through which the point of the second needle projects, and having its other end opposite said one end of the bar and provided with a centrally disposed longitudinal closed ended slot extending from the outer extremity of said other end of the arm to a point in front of the guide element and adapted to receive the point of the first mentioned needle, and also provided with a laterally disposed guide element adjacent its outer extremity projecting in the same direction as the point of the first mentioned needle.

5. As a new article of manufacture, a scriber adapted for use in scribing for cutting purposes a piece of linoleum or like material in connection with application or laying thereof, and comprising an elongated one piece arm having one end thereof slotted longitudinally and bent outwardly and then inwardly to form an integral rigid hook for hooking around one margin of the piece, a scribing needle arranged inwards of the hen at said one end of the arm an dto move longitudinally of said arm and having the point thereof projecting through the slot in the arm a short distance into the space within the hook and perpendicularly to the inwardly projecting portion of said hook and adapted when the arm is in its operative position with respect to said piece and the scriber is shifted sidewise to form a scribe in the adjacent face of the piece, and a rounded-guide element on the outer extremity of said inwardly extending portion of the hook projecting laterally in the same direction as the needle and adapted to abut against and ride on the edge of another piece of linoleum. or like material in lapped relation with the margin of said first mentioned piece.

6. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated member having at one end thereof a transversely extending scribing needle with the point thereof projecting beyond one side face of the member, and an arm positioned in opposed and substantially parallel relation with, and spaced a short distance from, said one side face of the member and having one end thereof shaped to form a hook adjacent to said one end of the member and provided at its outer extremity with a laterally disposed guide element projecting in the same direction as the point of the needle.

7. As a new article of manufacture, a scriber adapted for use in scribing pieces of linoleum and like material in connection with application or laying thereof and comprising an elongated bar having at one end thereof a transversely extending scribing needle with the point thereof projecting beyond one side face of the bar, a slide block mounted on the bar for sliding movement longitudinally of the latter, an arm positioned in opposed and substantially parallel relation with, and spaced a short distance from, said one side face of the bar and having one end thereof connected to the block so that it is bodily shiftable with the latter relatively to the bar and having the other end extending in the direction of said one end of the bar and provided with a longitudinal slot through which the point of the needle extends, and bent away from said one end of the bar and then inwardly to form a hook, and a rounded element connected to the outer extremity of the hook and extending laterally therefrom in the same direction as the point of the needle.

8. As a new article of manufacture, a scriber adapted for use in scribing for cutting purposes a piece of linoleum or like material in connection with application or laying thereof, and comprising an elongated arm having one end thereof slotted longitudinally and also bent outwardly and then inwardly to form a hook for hooking around one margin of the piece, the inwardly extending portion of the hook having a longitudinal series of internally threaded holes, a scribing needle arranged inwards of the bend at said one end of the arm and to move longitudinally of said arm and having the point thereof projecting through the slot a short distance into the space within the hook and in the direction of said inwardly extending portion of said hook and adapted when the arm is in its operative position with respect to said piece and is shifted sidewise to form a scribe in the adjacent face of the piece, and a guide element having an externally threaded stem to fit in any one of said holes and adapted when in connected relation with said inwardly extending portion of the hook to project laterally in the same direction as the needle and to abut against and ride on the edge of another piece of linoleum or like material in lapped relation with the margin of the first mentioned piece.

GEORGE H. CALLAGHAN.