Abstract: A removable ruler for manual ceramic cutters which can be rotatably mounted on the base of a manual ceramic cutter and which includes a rotary platform permanently secured to the base of the cutter by a rotary shaft; and two removable lateral extensions. The platform includes securing means for the rapid coupling and subsequent uncoupling of the lateral extensions.

Abstract: A system for marker placement includes a plurality of puzzle blocks connectable by a connection mechanism. The plurality of puzzle blocks include a plurality of markers positioned in a predetermined configuration. The puzzle blocks are connected together by the connection mechanism to surround a sensor for calibration of the sensor with the plurality of markers. The puzzle blocks include one or more sizes and have a quantity based on a calibration parameter of the sensor.

Abstract: A device for measuring the height of persons, the device including a vertical element and a headpiece arranged on the vertical element so as to be freely positionable. The headpiece is arranged so that it is rotatable relative to the vertical element by a rotational joint. An axis of rotation of the rotational joint is arranged obliquely with respect to a longitudinal axis of the vertical element.

Abstract: A portable foldable height measuring device which can be removably mounted to a vertical surface such as a wall in order to measure the height growth of a person, primarily a child, to determine that the child is growing at a proper rate and to keep an accurate record of the child's height on a given date.

Abstract: A door hanging tool includes a horizontal member having at least one bubble vial for the determination of the angle of a surface with respect to the horizontal member and, a vertical member having at least one bubble vial for indicating the inclination of the surface with respect to the vertical member. The horizontal member further defines anchor slots for receiving an anchor means for releasably attaching the tool to the existing pre-drilled hole for lockset from the door manufacturer, such that the user can view the bubble vial of the vertical member for indicating the vertical inclination of the door with respect to the vertical member, and can view the bubble vial of the horizontal member to determine the angle of the door with respect to the horizontal member, and can adjust the door accordingly.

Abstract: A combination ruler and square has first and second elongated straight ruler members with first and second recesses in the upper surface near opposite ends of the first ruler member that receive a tongue extending from an end of the second ruler member to form first and second configurations of the combination that respectively create a square and an elongated ruler. Magnets and detents in the tongue and recesses retain the tongue in a respective recess in the first and second configurations and an extra pair of alignable magnets in the first and second ruler members cause the rule members to be attracted to each other in an aligned storage configuration of the combination where the second ruler member overlays the first ruler member.

Abstract: An extendable edge reference tool is disclosed. A first segment having a extending end and a receptacle end is provided. The receptacle end includes a coupling mechanism for joining a second segment using an over-center locking force to secure said second segment to said first segment. This tool provides for a useful continuous reference edge over extended distances through adjoining segments. Each segment is suitably compact to be easy stowed. The segments are useful individually. The segments can be joined to extend tool to lengths useful in common construction tasks.

Abstract: The present invention resides in a collapsible level comprising a first segment; at least one additional segment, physically independent of the first segment and operable with the first segment to form the level; a leveling vial supported in at least one of the segments; and a linking member operable with the segments to permit the segments to be assembled and to secure an assembled relationship between the segments, as well as to maintain a connection between the segments when disassembled. In an alternative embodiment, the linking member is removed and the segments link together magnetically. The present invention further provides means for longitudinally extending the length of the collapsible level, thereby providing the collapsible level with the ability to level a wide range of shaped and sized surfaces.

Abstract: An extendable edge reference tool is disclosed. A first segment having a extending end and a receptacle end is provided. The receptacle end includes a coupling mechanism for joining a second segment using an over-center locking force to secure said second segment to said first segment. This tool provides for a useful continuous reference edge over extended distances through adjoining segments. Each segment is suitably compact to be easy stowed. The segments are useful individually. The segments can be joined to extend tool to lengths useful in common construction tasks.

Abstract: Apparatus using two hinged L-shaped squares to determine perpendicular with respect to a plane. Placing the apparatus against a plane with the squares offset angularly with respect to each other and placing an object to be secured to a plane adjacent to the hinge within fins parallel to the hinge permits securing the object perpendicular to the plane with one hand while holding the apparatus and object with the other hand.

Abstract: In some embodiments, a multi-piece frame square may include one or more of the following features: (a) a first arm, (b) a second arm, (c) a lever capable of being received by a slot within the second arm, (d) a retention portion releasably coupled to receiver slots on the first arm and receiver slots on the lever, (e) a receiver notch at a proximal end of the first arm, (f) catch portions on the second arm for receiving the lever, and (g) receiver holes on the first arm to receive alignment pins located on the second arm.

Abstract: The present invention resides in a collapsible level comprising a first segment; at least one additional segment, physically independent of the first segment and operable with the first segment to form the level; a leveling vial supported in at least one of the segments; and a linking member operable with the segments to permit the segments to be assembled and to secure an assembled relationship between the segments, as well as to maintain a connection between the segments when disassembled. In an alternative embodiment, the linking member is removed and the segments link together magnetically. The present invention further provides means for longitudinally extending the length of the collapsible level, thereby providing the collapsible level with the ability to level a wide range of shaped and sized surfaces.

Abstract: Apparatus using two hinged L-shaped squares to determine perpendicular with respect to a plane. Placing the apparatus against a plane with the squares offset angularly with respect to each other and placing an object to be secured to a plane adjacent to the hinge within fins parallel to the hinge permits securing the object perpendicular to the plane with one hand while holding the apparatus and object with the other hand.

Abstract: A connecting structure for T-square including a raised connecting section provided at an upper middle position of a crosspiece of the T-square, and a recessed fixing section correspondingly provided at a lower front end of a straight rule of the T-square for detachably receiving the raised connecting section therein. Therefore, the crosspiece and the straight rule of the T-square may be easily assembled to and disassembled from each other. And, the disassembled T-square may be conveniently carried or stored.

Abstract: The telescoping T-square has a crossbar or cross-member and an extendable shaft or leg. The cross-member is a relatively short bar having a pair of parallel runners longitudinally extending across the length of one surface of the bar and a slot defined through the bar between the runners that extends from the center of the bar laterally towards one of the ends of the bar. The leg has a tubular, hollow proximal rod removably attached to the cross-member, and at least one telescoping distal rod slidably disposed in the proximal rod, with detent buttons locking the rods together at selected intervals. One end of the proximal rod has transverse grooves or channels defined therein slidably receiving the runners and a threaded stud extending therefrom that is slidable in the slot defined in the cross-member. A knob engages the stud to temporarily lock the cross-member and leg in fixed relation.

Abstract: A handheld layout and marking tool including a rule-like member and a sliding handgrip for sliding to a user desire position. The sliding handgrip preferably includes an integrally formed braking device rendering a one hand operable combined sliding handgrip and braking device. A handheld layout and marking tool having a headpiece and a detachable rule-like member for insertion into the headpiece lengthwise to interchangeably form either a framing square or a T-square.

Abstract: A base frame for holding fixtures used in woodwork includes an extruded body having a raised top central portion formed into a dovetailed open-topped upper channel, two lowered wing portions located at each lateral side of the upper channel and formed into two symmetrically identical open-topped side channels with a height difference between the tops of the upper and the side channels, and a big-size open-bottomed lower channel formed below said upper channel and said two side channels. With the height difference between the upper and the side channels, two base frames may be perpendicularly connected to each other in the same plane using a U-shaped connecting bracket flush with the top of the upper channel, or superposed with the upper channels facing toward each other by locking inserting blocks in each open-sided channel formed between two side channels at the same side of the two superposed base frames.

Abstract: A drywall square having a straight long arm of at least forty-eight inches. The long arm has a first end and a second end, wherein the long arm is segmented into a plurality of sections between those ends. A straight short arm intersects the long arm. A first hinged joint connects the first end of the long arm to the short arm. The first hinged joint enables the short arm to be oriented at a perpendicular to the long arm or folded in parallel atop the long arm. The sections of the long arm are also connected by hinged joints. This enables the sections of the long arm to be unfolded into a linear configuration or folded together into a neat stack. Connectors are also provided that are used to retain the square either in its fully open configuration or its fully folded configuration.

Abstract: An improved tool comprising a carpenter's combined level and square includes: (a) a first elongated, straight section having distal and proximate ends and a centerline therebetween, with the proximate end having a flat surface whose upper part forms a 45 degree angle with the section's centerline, (b) a first leveling bubble fixed in this first section, (c) a second elongated, straight section having distal and proximate ends and a centerline therebetween, with the proximate end having a flat surface whose upper part forms a 135 degree angle with the section's centerline, and with the second section proximate end being proximate the first section proximate end, (d) a second leveling bubble fixed in this second section, (e) a coupling means having a bottom portion that is connected to the first section proximate end and a top portion that is connected to the second section proximate end and a connecting rod that is configured so as to connect these portions and allow them to independently rotate

Abstract: When I thought of the Speed jig it was to help speed up the construction process. The Speed Jig does this by eliminating the need to measure and mark the material being cut when making consecutive cuts using a handheld circular saw. The Speed Jig is simply a rule of measurement that compensates its measurements for the distance from the table of the saw, to the blade of the saw. What you set the measurement on the jig at is what it is going to cut once the table of a circular saw is passed along the fence of the jig.

Abstract: An expandable tool for laying out and marking predetermined angular layout lines on a work surface. The tool is comprised of a first leg (202), second leg (204), and hypotenuse leg (206) which are assembled by the user such that the intersection of the first and second leg form the desired angle as defined by the hypotenuse (206). The general shape of the assembled tool will normally be a triangle. Each leg of the tool can consist of a single leg portion (or member), or alternatively, each leg can be made up of more than one leg portion. The ends of each leg are fitted with a fastening mechanism (214) for connecting the leg portions together. The tool can be made to various sizes by the addition and deletion of leg portions. Additionally, the tool can be disassembled to facilitate compact transport to subsequent work sites.

Abstract: A combination level and T-square comprising an elongate level sensing section and an elongate T-bar section which can be alternately removed from or rigidly connected to the level sensing section in three locations to form three different configurations, a T-shape, a left-hand L-shape and a right-hand L-shape. The invention has two engagement hand screws; one for securing a sliding tongue into the level sensing section and the other for securing the T-bar to the tongue in one of the three desired configurations. The T-bar may be positioned further or closer to the level sensing section by sliding the tongue telescopically within the level sensing section.

Abstract: A carpenter's square that can have the arms thereof separated for ease of storage and joined together during use includes a over-center latch arrangement designed to be no thicker than the thickness dimension of the arm members and which, when operated, tightly clamps the arms of the square at right angles to one another. A first arm of the square has an opening formed through the thickness dimension thereof along with alignment bores extending inwardly from a side edge thereof on either side of the opening. The second arm includes the over-center latch pivotally mounted in a slot or channel and includes a latch plate pivotally joined to a coupling member having a head thereon designed to fit within the opening on the first arm member. When the latch plate is manually actuated so as to reside within the slot of the second arm, the head on the coupling member cooperates with an edge defined by the opening in the first arm to tightly clamp the first and second arms one to the other.

Abstract: A device for connecting the arms 4 of an angle, in particular a construction angle, comprises a corner piece 1 with two rails 5 which are at right angle to each other and to which the arms 4 which are formed by straight battens are connected by clamping bands 6.

Abstract: An auxiliary rule of the tile cutter has a body provided centrally and axially with a long slot. The body is further provided at one end thereof with an arm portion perpendicular to the body which is further provided with a connection portion. The arm portion is fastened detachably at one end thereof with the connection portion such that the arm portion can be coupled in reverse with the connection portion so as to facilitate the use of the auxiliary rule by a left-hander or a right-hander.

Abstract: A collapsible, compound level apparatus is provided and includes a first linear leveling section and a second linear leveling section. Each section includes at least one flat surface for contact with a work surface, and first and second bubble levels arranged for indicating level and plumb, respectively, of the work surface. The first section provides at one end thereof an engagement tongue that engages an engagement groove of one end of the second section, thereby providing colinear interconnection of the leveling sections and forming an integral linear structure for positioning the flat surfaces of each section in mutually coplanar contiguous alignment. The engagement tongue has an oblique surface and an end stop surface for contacting a mating oblique surface and a mating end stop surface of the engagement groove. The oblique surfaces and the mating end stop surfaces of each section form an acute angle.

Abstract: A T-square device with a mechanism for efficient adjustment thereof. The device includes a scale, base, and trigger mechanism. The trigger mechanism is spring-loaded for automatic locking of the base to the scale. Applying a force on the trigger counteracts the spring-induced forces and thereby releases the lock on the base to the scale, thus allowing the base to be slidable along the scale. The base and trigger mechanism is sized proportionally to fit the human hand.

Abstract: The layout tool is used for marking the positions for building materials, such as studs, joists, rafters, trusses and rough door opening trimmer studs, before nailing in permanent position on wall plates and sill plates. The layout tool has templates that are the same width of building materials, that are attached at indicia markings, "on center", from either end of an extruded member and the interlocking design of the manufacture keeps them perpendicular. Also provided are the rough door sizes that are indicia marked and layout can be marked from either end of invention.

Abstract: A multi-purpose combination tool for forming an enlarged T-square or, alternately, an elongated carpenter's level to facilitate installation of wall panels, doors, windows, signs and the like. The tool comprises an arm and a cross member rigidly mountable perpendicularly thereon. The arm and the cross member each have a central web portion with parallel flanges at opposite end edges of the web portion and spaced apart level vials secured within cutouts formed in each of the respective web portions. Ruler scales are situated along the end edges so that when the arm is rigidly mounted perpendicularly to the cross member, the scales share a common point of origin. In addition, the cross member, when so attached to the arm, forms a shoulder projecting outwardly therefrom against which the straight edge of a workpiece can be abutted while the arm itself is used as a guide for marking or cutting.

Abstract: First and second longitudinal body portions are hinged longitudinally together and include adjustable end extensions which adjust the width of the body portion to the width of the stair tread surface and also the riser surface, whereby to form a cutting pattern for cutting out a one-piece tread and riser portion of a stair cover when the template is laid on the cover. The template also has a front depending lip on the first longitudinal body portion for engaging a lip on the cover when forming a marking and cutting pattern for the cover.

Abstract: An attachment for a carpenter's level to create a T-square comprises an integrally molded head member having a rectangular socket formed therein and extending perpendicular to reference edges defined by opposed parallel spaced-apart side walls. By inserting one end of a spirit level into the socket and by tightening down a set screw, the head member is releasibly attached to the carpenter's level and with the longitudinal axis of that level intersecting the bottom edges of the head member at an angle of 90.degree..

Abstract: A golfer's square includes a ball position pointer or the like. The ball position pointer includes an elongate substantially parallel-sided pivotable rule with a pivot end and a pointer distal to the pivot end, and the ball position pointer or the like is rightly attached to an elongate substantially parallel-sided right rule attachable to the pivotable rule, with hook and loop material such as VELCRO (Reg. U.S. Pat. & Tm. Off.), to make the golfer's square. The golfer's square or the ball position pointer may be used separately in methods to assist the golfer align his stance properly. A protruding right angle edge may be provided on the right rule to faciliate orienting both rules prior to attaching same together.

Abstract: A guide having a unique folding construction which enables the guide to have all of its components oriented in a straight line condition or enabling the end components to be oriented in perpendicular relation through a novel hinge structure at the juncture between the two end components. The hinge structure includes a triangular rigid component that is connected to the end components by a hinge structure having angularly disposed hinge axes between a triangular connecting member and two end components so that the end components can be oriented in perpendicular relation, in overlying relation or in longitudinal alignment. The foldable guide device may be used for various purposes and is preferably constructed of transparent material and provided with various indicia, guide lines and the like which enable it to be used for various purposes including assistance in accounting entries in a ledger or the like.

Abstract: A chalk line framing square is provided to aid in placing right angle intersecting chalk lines upon a floor so that tiles can be properly installed on the floor. The framing square can check the squareness of the tiles as they are installed without being placed in the adhesive.

Abstract: A guide for use by bookkeepers, accountants, auditors and the like in association with ledger sheets, journals, spread sheets and the like having informational indicia associated in horizontal rows and vertical columns to enable such information to be more accurately and easily read with less chance of error. The guide includes an L-shaped member having an elongated horizontal component and a shorter vertical component both of which have a longitudinally continuous transparent area delineated by beveled red lines with the area externally of the red lines being translucent with the width of the transparent area being substantially equal to the width of horizontal rows of indicia and the width of the vertical transparent area being substantially the same as the width of vertical columns of indicia. The juncture between the transparent areas is provided with a window to enable transcription of indicia on the underlying ledger sheet by inserting a writing instrument through the window.

Abstract: A foldable template for laying out stairway stringers includes a plurality of step-defining members each having, in fixed relation, a tread-defining edge and a rise-defining edge and, for each pair of successive step-defining members, a corresponding intermediate member which is foldably attached to the respective successive step-defining members so that the step-defining and intermediate members of said template may be folded one upon another to form a compact stack. For use, the template is unfolded to provide, lengthwise, a number of step-defining members corresponding to the steps of a stringer. The template is then placed flat on a workpiece from which the stringer is to be cut, and the tread-defining and rise-defining edges are marked off on the workpiece which is thereafter cut along the marked off portions to yield the stringer.

Abstract: An insulation depth gauge for measurement of insulation depths within an attic at remote locations has a handle for extending linear measuring means to remote locations and indicia to indicate the depth of insulation at that location.

Abstract: This invention relates to a lay out square which can be folded from a flat position for storage to a position wherein the legs are substantially perpendicular to each other. A body comprising first and second legs spaced apart equal distances form a U-shaped member which is joined to a face marking portion formed by third and fourth legs aligned where first and second legs and having hinge means to pivotally secure the body portion to the body at substantially right angles.

Abstract: A column pad layout fixture having a pair of intersecting cross-arms and a third arm fixed to the intersecting pair of arms. An anchor bolt layout having an elongated rod and a cooperating cross-arm. A method of placing and fixing an anchor bolt plate accurately in a mass of concrete freshly poured into an excavation located at intersecting column center lines to provide a base for a single vertical column of a line of columns. A method of laying out a rectangular or square area upon a plane or flat surface.

Abstract: Mounting structure is provided for support from one side of an elongated body of a carpenter's level having a window extending transversely therethrough and opening through the aforementioned one side of the body. The mounting structure pivotally supports one end of an elongated arm from a first end of the body for swinging between a first position in superposed parallel relation to the aforementioned one side of the body and a second position with the arm projecting at 90.degree. relative to the body. The window in the body has a spirit level mounted therein and the arm includes a portion thereof in registry with the window having an opening formed therethrough. Also, the mounting structure and arm include coacting first latch portions for releasably retaining the arm in the second extended position thereof and second coacting latch portions for releasably retaining the arm in the first position thereof.