Abstract: A combination marking tool and wrench which comprises a triangular speed square having a T-bar extending substantially along the length of an outer edge of one of the sides of the triangular speed square. The T-bar has at least one nut engaging shaped opening located on its face and projecting outwardly away from the T square and near an end of said bar. Also shown is a speed square which contains additional marking scales and speed squares which are brightly marked so as to be easily found as well as speed squares easily identifiable via alphanumeric identification codes. More useful marking scales, including metric, and the rearrangement thereof provide greater speed, accuracy, convenience and utility for the speed square.

Abstract: A carpenter's square is provided which is uniquely configured for use in the construction of a building which utilizes metal framing members. The square is adapted to enable a steel wall stud to be aligned and oriented relative to a steel track to which the stud is to be fastened, and thereafter maintained in proper alignment while the stud is being secured to the track. The square includes a pair of detachable legs. One leg has an inner longitudinal edge formed with a longitudinal recess which extends across the entire width of the edge, such that a gap is created between the leg and a planar surface abutted against the edge of the leg. The longitudinal recess accommodates a portion of the track which extends over the stud, as well as the head of a fastener used to secure the stud to the track. To stabilize and secure the square to the wall stud, at least one of the legs is equipped with a magnetic portion which magnetically adheres the leg to the stud or track.

Abstract: A picture hanger aligning device and method for locating and aligning one or more picture hangers on a wall. An elongated, vertical center member and an elongated horizontal member having hooks protruding outwardly therefrom are connected in a triangular fashion by two elongated side members. A picture is hung from hooks on the horizontal member or, alternatively, from a hook on the vertical member, and held in a desired position against a wall. The position of a scribe hole in the vertical member is marked by inserting a marking utensil through the scribe hole, the picture is removed from the device, and the device is held against the wall in the desired position by aligning the scribe hole with the corresponding mark on the wall. The position of the hooks from which the picture is hung is then marked on the wall by inserting a writing utensil through scribe holes associated with the hooks.

Abstract: A multipurpose rectangular layout Ultra-square which incorporates attributes of a triangular shaped-square, Carpenter-square and is designed for use in conjunction with a conventional tape measure. The tape measure is attached in such a way that it forms a right angle to the layout square for measuring distances for a framing layout, enabling a user to mark multiple parallel lines in a perpendicular direction at specified distances measured from the end of the tape. The square has indicia in calibrated scales for rafter, angle and linear measurements. The squares base extends elongated. A guide is attached at a right angle and perpendicular to the base. The base and guide have edges and notches for dimensional marking and indicia placement. Some of these edges are used to significantly reduce the steps required for rafter layout. The square is dimensioned to compliment the size of standard material used in construction.

Abstract: Tools for use in drafting projects such as dress making include a ruler having five scales, a five-in-one tool, and a tool having utility in the construction of darts. The five scale ruler enables its user to determine fractional lengths without resorting to arithmetic calculations. The five-in-one tool provides a 90.degree./45.degree. angle, two scaled straight edges, a hip curve, a sleeve cap, neckline, and armhole curve, and a pair of spaced apart apertures for use in making Raglan sleeves. The dart tool is a forty five-forty five-ninety triangle having equidistantly spaced apertures formed along the length of the hypoteneuse. The apertures enable use of the tool as a compass for drawing circles and semicircles.

Abstract: A flat triangular piece, usually of shatter resistant plastic, is formed with straight edges and is used in connection with a T-square for drawing perpendicular lines and geometric shapes. The outside peripheral corners are rounded for safety purposes and the intermediate portions of the legs are slotted or recessed to permit the utilitarian reproduction of triangular lines and shapes with sharp points.

Abstract: A navigational plotter consisting of a triangular shaped navigational plotter, having two angle members and a rounded third corner employing a compass rose and a central orientation point for use as a navigation aid in combination with LORAN computerized navigational system or alternative Global Positioning Navigational Systems. This navigational plotter enables a navigator to easily locate the position of his ship on a chart by using input from the LORAN/GPS systems and by the use of this true course chart calculator which provides a course for checking the computerized course information and assists in avoiding obstacles in the path of travel not shown by the LORAN or GPS systems. When used with a LORAN or GPS system, the navigational plotter allows the navigator to plot a course on a chart or map and then to quickly locate the current position, orient the plotter correctly and get an overview of the true course.

Abstract: This invention relates to rotating saw alignment devices and methods and more particularly to devices and methods which facilitate the proper alignment of radial arm saws, and more specifically to a very simple device (10), used in conjunction with a carpenter's square and a writing instrument, with a flange (50) containing an extended section (60) used as a writing instrument guide, which in use can align the fore and aft edges of the saw blade, and a plurality of auxiliary flanges (30),(40), used to align the saw blade perpendicular to the table. The alignment device can also be used to aid in replacement and alignment of the saw table and check the trueness of the saw blade retainers and motor arbor.

Abstract: A generally U-shaped carpentry building tool is provided, which includes a reference plate member for placement on one or more building members and having an inner edge and outer marking edge; a first marking guide arm connected at 90.degree. to one end of the reference plate member; a second marking guide arm connected at 90.degree. to the other end of the reference plate member to form a generally U-shaped tool; a first lip member connected to one edge of the reference plate member to form a first right angle, corner-engaging member for engaging the corner of the one or more building members to properly position the reference plate member relative to the one or more building members; and a second lip member connected at 90.degree.

Abstract: A tool guiding measuring apparatus or apparatus for measuring a portion of a workpiece and guiding a tool during an operation on the workpiece. The apparatus includes an aligning body portion for positioning the apparatus in a desired orientation against a workpiece. Two tapes are provided on the aligning body portion for measuring the dimension of a portion of the workpiece. A selectively positionable clamp on a free end of the tape is used to calibrate the apparatus to provide a true measure on the tape of the dimension of the workpiece while compensating for the dimensions of the apparatus and tool. The selectively positionable clamp securely attaches to each of the tapes at a desired calibration position on the respective tape to provide ease of use and repeatable measuring. The apparatus also includes a clamping device which clamps the apparatus to the workpiece to prevent movement of the apparatus while cutting.

Abstract: A bow angle tuner for aligning an arrow to an archery bow, for precise arrow flight, while the arrow is in the bow, by measurements or comparisons which integrate a minimum of five mechanical bow adjustments, and the diameter of the arrow. A planar member includes a groove, either angular or circular, on one face in which an arrow, of any commercially available diameter, is releaseably secured. One or more rulers, of suitable and equal length, are releaseably attached to, or integral to, the planar member and positioned in such a manner that the rulers form an included angle of less than one hundred eighty degrees and the included angle is bisected by the groove in the planar member and centers on the groove in the planar member.

Abstract: A device for making an arc of a predetermined radius at a square corner of a workpiece includes a positioning member having first and second edge members which are joined together at a right angle so that the positioning member may be seated against the square corner and an arc member extending across a portion of the right angle formed between the first and second edge members. The arc member is planar with the positioning member disposed on and extending from the arc member. The device may also include multiple positioning members and multiple arc members having different arc radii.

Abstract: A layout square having a handle and two legs that extend away from the handle in the same direction, both perpendicular to the handle. The handle includes a level to allow angular measurements against level, as well as for plumbing and leveling purposes. The legs correspond in width to standard dimensions of construction materials to facilitate the measuring and marking of those dimensions on materials. One leg is marked along its edges with linear and angular measurement marks for measuring and marking lines and angles, and has holes disposed selectively along its length for receiving a marker, such as a carpentry pencil. The other leg is marked with angular measurement marks along its edges and has a window with pitch marks along the edges thereof to facilitate the measurement and marking of angles and pitch.

Abstract: A layout marking cut guide lines and drill hole locations on timber members during the construction of a timber structure. The layout tool is a quadrilateral planar body with a portion of one of its sides relieved to form a quadrilateral void. The layout tool has a calibrated linear guide slot and a calibrated arcuate guide slot used to measure and mark cut guide lines on rafters corresponding to various roof pitch angles. The layout tool may also have view holes for marking particular angled cut guide lines and drill holes for measuring the drill centers for foundation bolts on 2.times.4 and 2.times.6 timber members.

Abstract: A system for measurement of the geometries and axes of rotation of an object such as the human body is disclosed. The system includes fixtures which are employed in conjunction with sonic, infrared or other digitizer sources. In the case of the human body, the measurements are made by placing the digitizer sources at locations such as the shoulders, waist and legs to monitor the position of the body during various measuring sequences. The digitizer determines the position of the sources in space by measuring the time for the signal to reach an array of receivers. The fixtures employed in the invention include: a T-square foot reference; a single source digitizing strap; an offset digitizing wand; a base and angle fixture; a foot and hip rotation fixture; an ankle axis practice fixture; and an umbilicus reference bar.

Abstract: The drafting instrument of the invention (10) disclosed herein generally compromises a planar body in a quadrilateral, symmetrical form, having four perimeter sides (22,24,26 and 28), interconnected end to end to form a quadrilateral configuration and show an open space (40) in the interior of the body, and of which two pairs of sides are right angles to each other and positioned opposite and symmetrical to each other on the planar body. The instrument is provided in two primary embodiments, the first, adapted from a 45 degree triangular instrument, where side intersections of the present invention comprises a 135 degree, a 90 degree, a 45 degree and a 90 degree interior angle, respectively and the second adapted from a 30/60 degree triangular instrument, where side intersections of the present invention comprise a 150 degree, a 90 degree, a 30 degree and a 90 degree interior angle, respectively.

Abstract: A tool for holding fabric during cutting, measuring, etc., consisting of a handle and a number of sheets, each of a different size and of transparent material, each including the handle selectively connectable to each of the transparent sheets, each sheet having indicia marked on the transparent sheets to assist in cutting, measuring, etc.

Abstract: A roofing speed square of right-triangular shape and methods to use same wherein rafter base cut marks may be made in one step and rafter common cut marks may be made more easily, accurately and safely than marks made employing currently available devices are disclosed. The speed square has a measurement edge, a base edge and a hypotenuse edge. The base edge is T-shaped in cross section. The measurement edge has indicia in units of roof unit rise. When the speed square corner opposite said measurement edge is superimposed on the top corner of the rafter to be marked, and the measurement edge indicia value corresponding to the unit rise of the roof upon which the rafter is to be installed is aligned with the top edge of said rafter, then the speed square hypotenuse may be used as a ruling edge whereby the base cut mark may be drawn.

Abstract: A generally L-shaped gauge is provided including short and long legs disposed at 90 degrees relative to each other with the width of the short leg being generally two-thirds the width of the long leg and with each of the legs having a V-shaped slot formed therein and extending longitudinally thereof, the major width end of each slot opening through the free end of the corresponding leg. The exterior angle side of the long leg includes length indicating indicia extending therealong from the excluded angle side edge of the short leg, the included angle side edge of the long leg includes length indicating indicia spaced therealong from the included angle side edge of the short leg and each of the legs having indicia spaced along the corresponding notch indicating the circumference of a finger digit joint transversely seated in the notch.

Abstract: A layout for a static structure, such as a building or the like, is defined using a plurality of triangles and a plurality of tethering cables. The layout is effected by measuring from a property line for a starting point and for a length of a base line. The triangles and tethering cables are located and connected to define at least one angle, and further angles and lines are measured from this first angle.

Abstract: An apparatus for laying out positions for the attachment of studs having a desired center to center spacing therebetween on a base plate includes a flat layout square which is precisely dimensioned for easily marking stud positions with a marker on the base plate. The layout square includes a short arm and a long arm extending perpendicularly from the short arm. In one embodiment, the short arm has a width which is equal to the actual thickness of the stud, and the long arm has a length from the intersection of the long arm which is equal to the stud spacing. This layout square also includes a dominant indicator adjacent a free end of the long arm which is spaced from the free end by an offset distance equal to one half of the width of the short arm. In one configuration, the indicator is an outside notch in the long arm and may also further include an inside notch in the long arm.

Abstract: A carpenter's square is disclosed which is capable of simplifying common woodworking layouts by means of various ports and a reference point used to appropriately orientate the square. The square can also advantageously be used as a dividing tool for longitudinally dividing a piece of wood.

Abstract: The present invention discloses a multi-purpose drafting instrument adapted to combine the functions of drafting triangles and commonly used drafting scales. The drafting instrument of the invention generally comprises an L-shaped integrally formed substantially planar construction having two legs of equal length and width disposed perpendicular to each other. The end of each leg is inclined at an angle of 45 degrees relative the outer edge of each leg, the upper face of each leg is beveled at its inner edge to provide a thin working edge, and a ruled scale is provided on the lower face of each leg at its inner edge. The drafting instrument also includes a plurality of glide points extending outwardly from the lower face of the instrument to support the instrument slightly above the surface upon which it is used, and a handle disposed near the intersection of the two legs of the instrument to facilitate its use.

Abstract: An improved angle drafting set is provided and consists of a trapezium tool and an angle modifier tool. The trapezium tool is so constructed that a person can accurately draw angles in five degree increments between zero degrees and three hundred and sixty degrees. The angle modifier tool is so constructed that when used in conjunction with the trapezium tool the person can accurately draw angles in whole degree increments between zero degrees and three hundred and sixty degrees with the trapezium tool.

Abstract: A template is provided for marking a picture mat blank in preparation for subsequent cutting. The template is comprised of two planar arms, a mat-opening design cut into the re-entrant corner of the arms, and graduation lines on the arms for measuring the widths of the mat borders. The template is placed in position on the back of a mat blank so that the arms are parallel with the edges of the mat blank and the edges of the mat blank line up with the appropriate graduation lines for the border widths desired. The inside edge of the template is then traced onto the mat blank with a pencil. Layout marks which show users of mat cutting machines where to start and stop cutting may also be traced. In addition, mat-opening designs incorporating cut out circles and ovals in the mat blank may be laid out using the template.

Abstract: The drafting instrument of the invention generally comprises a triangular integrally formed substantially planar construction having three perimeter legs, interconnected end to end to form the triangular configuration and define an open space in the interior of the body, and one interior leg extending across the open space to form interior complementary angles to the angles formed at the respective intersections of the perimeter legs. The instrument is provided in two primary embodiments, the first adapted as a 30/60 degree triangular instrument and the second as a 45 degree triangular instrument. The instrument includes a plurality of glide points extending outwardly from one or both faces of the instrument to support the instrument slightly above the surface upon which it is used, and further includes a handle assembly disposed near the intersection of two of the perimeter legs of the instrument.

Abstract: The drafting instrument of the invention generally comprises an L-shaped integrally formed substantially planar construction having one long leg and one short leg disposed perpendicular to each other. The end of each of the legs of the instrument is inclined at an angle of 45 degrees relative to the outer edge of each leg, and the lengths of the legs of the instrument are proportioned such that complimentary 60 degree and 30 degree angles are formed between the edge of the short leg and the edge of the long leg, respectively, and a straight line intersecting the end point of each leg. The instrument includes a plurality of glide points extending outwardly from each face of the instrument to support the instrument slightly above the surface upon which it is used, and further includes a handle disposed near the intersection of the two legs of the instrument to aid in reversing the instrument from face to face during use.

Abstract: A fixture for holding workpieces at predetermined angles while they are being interconnected includes a pair of legs and a hypotenuse forming a right triangle, whose three vertices are truncated to enable the fixture to function as a jig, as a template, or as a bending tool. Workpieces may easily be attached to the fixture, obviating the need for special clamps.

Abstract: A square for glass cutting has a triangular shaped phenolic plastic body having a head supporting base member, a straight edge, and a straight edge strengthening member. The base member has a plurality of apertures having diameters of a first dimension. A head member includes first and second head plates interconnected and spaced by a bridge to sandwich the base member. The first and second plates have a plurality of apertures having centers corresponding to the centers of the base member apertures, but having diameters of a second dimension less than the first dimension but equal to the diameters of set screws, whereby when the head member is loosely attached to the head support member by the set screws the squaring of the first head plate automatically squares the second head plate and the tightening of the set screws maintains the squared relationship between the head plates and the straight edge member.

Abstract: The disclosed guide, or square, has an elongated planar body, and a planar cross bar angled normal off one end edge of the elongated body, somewhat in the configuration of a "T". One end of the cross bar projects away from the elongated body only a short distance, of the order of 1/4 to 5/8 of an inch; while the other end of the cross bar projects a much greater distance from the elongated body, of the order of 11/8 to 11/4 of an inch, to correspond generally in length to the width of the narrow side of a standard framing member or stud. Correspoding side edges of the elongated body and cross member lie in a common plane disposed normal to the corner intersection between the elongated member and cross bar. With the elongated body positioned against the wide side of the stud, and the extended cross bar end squared against one narrow side of the stud, the cross bar end projects virtually across the one narrow side of the stud.

Abstract: A tool useful for marking and constructed of a flexible material which includes a flat member having a structural layer of a predetermined shape with first and second parallel surfaces, the structural layer having marking edges perpendicular to the first and second parallel surfaces for measuring, aligning and marking, a first wear rim along the marking edges extending a uniform distance away from the first parallel surface of the structural layer, a second wear rim along the marking edges extending a uniform distance away from the second parallel surface of the structural layer, a plurality of first marking indicia on and extending away from the first parallel surface along the first wear rim, a plurality of second marking indicia on and extending away from the second parallel surface along the second wear rim, wherein the first wear rim extends away from the first parallel surface a greater distance than the first marking indicia extend away from the first parallel surface, and wherein the second wear rim e

Abstract: A floor square for use in squaring and marking a ledger notch in the end of a floor joist and for use in marking the intended position of a ledger on a girder.

Abstract: The disclosed guide has an elongated planar body and a planar cross bar, angled normal to the body off one end edge thereof, somewhat in the configuration of a "T". One end of the cross bar projects away from the elongated body only a short distance, 1/4 to 5/8 of an inch; while the other end of the cross bar projects 11/8 to 11/4 of an inch away from the elongated body, corresponding to the width of the narrow side of a standard "metal stud" framing member. With the elongated body positioned against the wide side of the stud and the extended cross bar end squared against one narrow side of the stud, someone can consecutively mark both stud sides with this single guide setting; requiring the guide to be repositioned only once to mark the remaining narrow stud side.

Abstract: A straight edge stock is lockable at any desired location along the length of a steel rule with the stock and rule forming perpendicular straight edges. The stock includes an integral protractor triangle projecting from a thicker barrel of the stock and having a hypotenuse edge extending generally from the bottom of the stock barrel angularly toward the rule. The margin of the protractor triangle adjacent to its hypotenuse edge has a scale of angle calibration markings indicating the angle of a line connecting each individual marking and the top of the leading edge of the thicker stock barrel.

Abstract: A guide provides a straight edge along which a cutting tool may be guided to form V grooves in fiber glass sheet material. The guide has indicia and line markings at spaced locations thereon, selectively alignable with the edge of the last previous groove cut in the sheet or panel. When the guide is so located, according to the transverse dimensions of the several walls of the duct that is to be formed from the fiber glass panel, it automatically accounts for the width of the cutting tool that is to be moved along the straight edge of the guide, to assure that the next V groove will be formed at an exact distance from the groove that was last cut.

Abstract: A pair of simple rules, each having a body portion identical with a standard rule and a head at one end cooperating with the other rule, for placing the two rules in an arrangement forming a T-square, and enabling one to be moved or slid along the other. A modified form includes means for releasably binding the two rules together in set position.

Abstract: What is disclosed are novel tools for facilitating the laying of roof shingles so that shingles can be aligned on a roof to give regular and even courses. The tools provide an alignment and spacing of the shingles without the need of utilizing gauges or tools that require adjustments, and the lightweightness and small size of the tools provide easy storage at the worksite on the roof so that the workman need not make repeated trips to the ground to recover tools not having the advantages herein for storage, that have been dropped or dislodged.

Abstract: The disclosed system assists an operator in dealing with flaws encountered during the spreading of web material to be cut in accordance with a marker stored in a computer memory. Information representing the location of the flaw is processed by a computer in conjunction with the marker information to yield results visually displayed to the operator concerning the seriousness of the fault's location and corrective action to be taken if the flaw does fall at a troublesome spot. The flaw location representation may be made by manual measurements entered into the system by way of a keyboard or may be made semi-automatically through a two-dimensionally encoded pointer. The visual display may give the operator information concerning a patch or concerning stop and restart lines for making a splice or may display a portion of the marker in the vicinity of the flaw.

Abstract: A designer's triangle which permits completion of a drawing with the use of a single instrument includes a planar sheet having three external edges forming a triangle with angles of 45.degree., 60.degree. and 75.degree., respectively. The planar sheet defines three-sided first and second internal triangular cutout openings having respective edges lying along perpendiculars to edges of the external triangle and a trisector of the 45.degree. angle. In some preferred embodiments these perpendiculars intersect at a common point and may constitute altitudes of the external triangle.

Abstract: Method and apparatus for locating pictures or three-dimensional objects of any kind or size on at least one mat or mount using a template of transparent, flexible, semi-rigid material of a preselected thickness having guide holes extending radially outward from a center point on the template to align the picture or object in a preselected position on either at least one mat or mount by marking the at least one mat or mount through the guide holes corresponding to the particular dimensions of the picture by a marking means.

Abstract: A set square has substantially the form of a 30.degree./60.degree./90.degree. triangle having therein an aperture having sides at 15.degree. and 45.degree. to each external side. The aperture may be in the form of a 30.degree./30.degree./120.degree. triangle disposed with its longest side closest to the hypotenuse of the 30.degree./60.degree./90.degree. triangle and at an angle of 15.degree. thereto, said side diverging from the hypotenuse towards the 30.degree. vertex of the 30.degree./60.degree./90.degree. triangle; preferably a line is indicated perpendicular to one of the external sides other than the hypotenuse, the line being indicated adjacent said side and extending across said aperture, and being indicated on either side thereof. There may be a protractor scale whose origin is at the intersection of the line and the perpendicular side.

Abstract: A handle for a drafting instrument and the like comprising a ring body structure having a traverse slot therethrough for permitting the ring to be compressed, and further provided with a groove or ridge structure for complementary engagement with the perimeter of a hole and double aperture of a drafting instrument with which the handle is used. The preferred embodiment has one ridge which is closest to the gripping surface of a handle of larger diameter than a contact ridge furthermost from the gripping surface for permitting easy indexing of the handle during installation with the drafting instrument. Another embodiment reverses the respective diameters of the two ridges, while a further embodiment employs an internal spring for increasing the outward tension of the ring when released, and a further embodiment wherein tongue and groove structure is complementarily provided between the drafting instrument and the engaging portion of the handle ring.

Abstract: A lightweight portable carpenter's tool that singularly performs the functions of triangle, ruler, square, protractor, and leveling device. The special protractor function allows for continuous same plane usage in order to scribe material or to guide a power saw across a given material.

Abstract: A drafting instrument is provided for making pictorial drawings, especially axonometric projections. The instrument is in the form of a template which is placed over the drafting surface and may be attached to a drafting machine, straight edge, T-square, or the like. The template is formed with a straight lower edge, perpendicular side edges and a pair of upper edges defining an angle corresponding to the angle of the view to be drawn, i.e. dimetric, trimetric, isometric. The template includes a vertical centerline at the junction of the two upper edges. The margins along each angled upper edge is marked with graduated markings corresponding to the particular angle of the template and parallel to the adjacent angled upper edge. The template also includes a rectangular window or slot extending parallel to the lower edge and provided with graduated markings formed along the edges thereof for use in preparing the views.

Abstract: A structural beam square for laying out the web of a structural steel beam, or the like, is disclosed which includes a pair of arms which extend at right angles to each other. The arms have a T-shaped cross section and include coplanar stem members and flanges which extend along the inner edges of the stem members. The flanges support the square on the web of a beam with the stem portions at a raised position above the web, and above the fillet at the intersection of the beam web and beam flange. Gauge members are releasably secured to one arm of the square, which gauge members include gauge plates which are of the same height as the arm flanges. With one arm of the square abutting the beam flange, a line may be scribed across the web along the flange of the other arm. The square is moved along the web, and cross marks are scribed on the web along the gauge plates of the gauge members secured to said other square arm.

Abstract: This invention relates generally to mobile carpentry and drafting devices and, more particularly, to an integral combination type device which is capable of performing multiple geometry measuring functions within a single instrument. The invention relates specifically to a unique combination of independent carpentry functions into a single device to replace separate tools heretofore required to perform individual functions. The Squareangle may be used to check surfaces for plumb and levelness; check inside and outside squareness; find the center of a circle, square, or octagon; mark 45.degree. and right angles; scribe lines; measure distance; and perform other geometry and drafting functions without the aid of additional devices.

Abstract: A designer's triangle providing for the selection of angles from 15 to 90 degrees in a single implement, in increments of 15 degrees or less, and further including provisions for draft or taper angles to vary the aforesaid angles. Further embodiments include metric, fractional and tenth of inch embossed scales, protection against smudging, and marked or designated radii at a plurality of points on the triangle.

Abstract: A device for aiding in the hanging of a picture or similar wall supported member. The device is of an inverted "T" shape having cross arms and a neck part. Slide members are carried on the cross arms to engage a hanging wire. Locating marks on the neck part indicate the top of the picture and are used to position the device at a desired wall location for the picture with the slide members locating the hangers, such as hooks.

Abstract: A device for drawing parallel lines both in vertical and horizontal directions, and for drawing circumferences without a compass, includes two pieces, one of which is a set square and the other of which is a plate. Two adjacent edges of the plate are provided with markings, such as a millimetric scale, and groups of holes are distributed in relation to the markings of the indicated scale.