Abstract: The invention relates to a housing having at least one current passage that is impervious to high pressure acting from the exterior, e.g. of at least 1000 bar, e.g. up to 8000 bar. The housing has a first housing part and a second housing part that by spaced-apart bearing surfaces that are facing one another, between which at least one insulator is arranged, with the at least one insulator imperviously encompass an inner volume. The housing is opened easily by spacing apart the first housing part from the second one. Generally, the housing parts are electrically insulated from one another by the insulator.

Abstract: A tool, such as a tape measure, including a spring-based retraction system is shown. The retraction system utilizes an epicyclic gear train coupled between the tape blade winding reel and a rotating arbor or axle within the tape measure. A spiral spring has an outer end coupled to the reel and an inner end coupled to the axle. The gear train may be a reduction gear train such that the axle rotates slower than the reel. By coupling the spiral spring between the gear train input and gear train output, high energy density springs may be used, which may allow for decrease in housing size, increase in tape length or thickness for a given housing size, and/or advantageous retraction speed control.

Abstract: A fly-fishing reel having an integrated incremental meter device along with a modular weight system for customizing the weight of the fly-fishing reel in order for an angler to use the fly-fishing reel with a variety of fly rods and still maintain a desired balance point. The modular weight system allows the balance point of the rod and fly-fishing reel to be adjusted. The incremental metering device is adapted for keeping a tally of selected data, such as, though not limited to the number of fish caught or released.

Abstract: A coupling device for connecting first and second chalk lines includes a generally planar body portion having a first end, a second end and opposed sides edges, an aperture formed in the body portion adjacent to the first end for attaching a free end of a first chalk line to the coupling device, and a plurality of spaced apart and linearly aligned hooks extending from the body portion adjacent to one of the side edges, the plurality of hooks defining a channel for receiving a second chalk line therethrough. Each of the hooks includes a clearance portion for insertion of the second chalk line into the channel defined by the plurality of hooks.

Abstract: The tension element position sensor includes three housing elements, wherein the two outer housing elements are configured pot shaped with a base towards a center housing component, wherein one element is the spring motor and the other is the rotation angle sensor. Thus the rotation angle sensor includes two Hall sensors, wherein an encoder magnet rotates as a function of the rotation of the winding drum opposite to the faces of the Hall sensors on the face side of one respective gear of two gears meshing with one another. Herein the arrangement of the gears and circuit boards in the receiver of this lateral housing component is of particular importance. Also the spring motor can be completely preassembled and stored in a closed manner.

Abstract: A depth determination apparatus is described. The depth determination apparatus includes a rotatable reel for receiving a length of line, a free end of the line being adapted to receive a weight, a hollow elongate leader assembly through which the line is played out and retracted, a measuring arrangement for measuring the length of line played out and/or retracted through the hollow elongate leader; and a drive means for at least retracting the line through the hollow elongate leader.

Abstract: A chalk line apparatus having a line and spool and a releasable end. The releasable end comprises a hook member having a rod member, a releasable member pivotally attached to the rod member and a spring positioned to bias the releasing member against the hook member. The releasing member has an attachment location for the line. Additionally, the spring is sized and shaped to allow rotation of the releasing member about the rod member and relative to the hook member upon a force exerted at the attachment location from the line.

Abstract: A measuring tool is used to measure the shape of a person's body. The tool has a belt and at least one measuring tape attached, which extends perpendicularly to the belt. The tool is held to the person's waist with the belt. While the person is standing, shape measurements are typically made at one or more points based on the measuring tape. This measuring tape extends a length sufficient to include the person's seat and hip, where the shape will be measured, but will generally not be as long as the person's leg or long enough to touch the ground.

Abstract: A positioning device includes a computer including a stored design file, such as a CAD file, for positioning a selected portion of the design on a workpiece. In a first embodiment, a base unit houses an extensible cable including a free end for placement by a user at a design point on the workpiece. A turn carriage freely rotates about a turn axis to follow cable movement. In output mode, the user is directed to move the cable free end toward the portion of the design and a cable tensioning motor adjusts the tension in the cable sufficiently to indicate when cable free end is at a distance to the portion of the design. Other embodiments include: a turn carriage servoed motor for rotating the turn carriage to follow the cable; and a pitch carriage and servoed motor for rotating the pitch carriage for following the cable.

Abstract: A measuring device for providing a portable and easy-to-use electronic measuring device. The measuring device generally includes a housing which includes a locking member, a reel member, a sensing assembly and control unit. A length of string is wound around the reel member, which is secured within the housing in a manner which allows the string to be retracted around the reel member absent outside force. As the string is dispensed through a string opening on the housing, a sensor wheel having a plurality of counting indicia will be rotated underneath one or more sensing members, which act to calculate the distance of string which has been dispensed. This data is communicated to a control unit, which causes the relevant information to be shown on a display on the housing. The locking member may be utilized to stop the string from being dispensed after the requisite length has been dispensed.

Abstract: The present invention generally relates to an eye alignment training device that may be used to train and improve an individual's ability to align their vision. In using this device, a base piece of the device is held by the user, a connector may extend from the base piece while another end of the connector may be secured, for example, to a wall. Between each end, sliding markers slideably positioned on the connector may have various visual characteristics. For example, each marker may be of a different color. The markers may be moved to different locations on the connector, and the subject may move his focus between the various markers. When not in use, the connector may be stored in a cavity within the base piece, such as by being wound around a groove in the base piece, retained within a gap in the base piece, or retained within a cavity enclosed within the base piece. The device may have a retraction mechanism which retracts the connector into the cavity of the base piece.

Abstract: A device, a method and a guiding device for setting out contours, points or works, including a computer-controlled measuring device provided with a movable measuring probe and a portable base unit provided with a rotatably supported elongate arm. The measuring probe is connected to the measuring device by means of a cord or a wire via the elongate arm, and the measuring device is provided with sensors for measuring a length or a change in the length of the cord or the wire and rotation of the arm in at least one degree of freedom for providing position data of the measuring probe.

Abstract: A flexible and non-elastic cord is provided. The cord may have a first plurality of markings, spaced apart by a uniform first distance, and a second plurality of markings, spaced apart by a uniform second distance. The uniform first distance may be substantially larger than the uniform second distance. Each of the first plurality of markings may be colored a first color. Each of the second plurality of markings may be colored a second color which is different from the first color. Each of the first plurality of markings and each of the second plurality of markings may be a straight line. The uniform first distance may be sixteen inches and the uniform second distance may be twelve inches. The cord may be placed next to a winding path to be measured, so that the cord follows the winding path, and the winding path may be measured using the cord.

Abstract: Method for measuring a rheological transition level between a first layer with first rheological properties, typically a fluid mud layer, and a second layer lying thereunder and having different, second rheological properties, typically a solid mud layer, wherein using a cable an object is lowered through the first layer into the second layer lying thereunder. A dynamic quantity of the moving cable with object, influenced by the rheological properties, or a change of this quantity, is measured. It is determined on the basis of this measurement when the object is located at the rheological transition level.

Abstract: A measuring device measures distances via a thin retractable wire with a removable head. Distance is calculated and displayed on a very bright, large LED or other type screen. As the wire is extended, a microprocessor calculates the distance and displays it on its screen. The digital measuring device comprises a housing, a very thin extendable wire, cable or tape, a rotating spool, (from which the wire extends then automatically retracts to), a sensor which measures the amount of wire extended, a microprocessor, a tiny flash drive or other type of memory storage, a microphone/speaker, a large (size of unit) mono or duo chromatic or other type of display screen (LED) and a few buttons and/or a menu driven interface which control functionally. A plurality of removable heads may be attached to the wire for performing different measuring functions.

Abstract: The method uses a cable measurement and cable positioning or laser projection device to measure a structure to produce a digitized design of the structure and to put the design on a panel by laser pointer projection or by cable positioning so that the panel can be marked and cut for fitting on the structure.

Abstract: A measuring device generally comprises a base unit housing an extensible cable; the cable including a free end for placement by a user at a point being measured. The base unit, placed in line of sight of the point, includes: a base; a first carriage rotationally attached to the base about a turn axis; and a second carriage rotationally attached to the first carriage about a pitch axis. Servoed motors rotate the carriages to align them with cable path to the point. The turn angle, the pitch angle and the cable length are measured to determine the point's location. A plurality of points determines a surface. The user uses a programmed PDA with a radio to communicate with the base unit. An alternative embodiment only has a first carriage.

Abstract: A positioning device includes a computer including a stored design file, such as a CAD file, for positioning a selected portion of the design on a workpiece. In a first embodiment, a base unit houses an extensible cable including a free end for placement by a user at a design point on the workpiece. A turn carriage freely rotates about a turn axis to follow cable movement. In output mode, the user is directed to move the cable free end toward the portion of the design and a cable tensioning motor adjusts the tension in the cable sufficiently to indicate when cable free end is at a distance to the portion of the design. Other embodiments include: a turn carriage servoed motor for rotating the turn carriage to follow the cable; and a pitch carriage and servoed motor for rotating the pitch carriage for following the cable.

Abstract: A measuring device generally comprises a base unit housing an extensible cable; the cable including a free end for placement by a user at a point being measured. The base unit, placed in line of sight of the point, includes: a base; a first carriage rotationally attached to the base about a turn axis; and a second carriage rotationally attached to the first carriage about a pitch axis. Servoed motors rotate the carriages to align them with cable path to the point. The turn angle, the pitch angle and the cable length are measured to determine the point's location. A plurality of points determines a surface. The user uses a programmed PDA with a radio to communicate with the base unit. An alternative embodiment only has a first carriage.

Abstract: A device for measuring the length of a cable under tension moved through the device generally comprises a frame, a measuring pulley rotatably mounted on the frame; an anti-slip device for rollingly holding the midsection of the cable in a non-slipping manner against the measuring pulley such that movement of the cable rotates the measuring pulley, and a rotation sensor for sensing the rotation of the measuring pulley and producing a signal indicative of the rotation thereof. The anti-slip device generally comprises one or more loading rollers and a loading assembly including a flexible tension member for applying loading to the loading rollers such that movement of the cable rotates the measuring pulley. A location measuring device incorporating the cable length measuring device determines the direction and distance from the location measuring device to a free end of the cable.

Abstract: A golf putting device that comprises: (a) a rotating head that includes a retractable line, a clip that attaches the retractable line to a golf club, and a first connecting member; and (b) a base that can be inserted in a golf hole and includes a second connecting member located on top of the base. The rotating head is attached to the base by engaging the first connecting member onto the second connecting member, and the rotating head rotates on the second connecting member. In embodiments for off-hole use, the golf putting device may further include a plurality of removable legs attached to the base. The rotating head may also include a housing which encloses the retractable line. This housing includes an aperture through which the retractable line passes through. The retractable line is wrapped around a spool that includes a spring wound on an arbor.

Abstract: A measuring device generally comprises a base unit housing an extensible cable; the cable including a free end for placement by a user at a point being measured. The base unit, placed in line of sight of the point, includes: a base; a first carriage rotationally attached to the base about a turn axis; and a second carriage rotationally attached to the first carriage about a pitch axis. Servoed motors rotate the carriages to align them with cable path to the point. The turn angle, the pitch angle and the cable length are measured to determine the point's location. A plurality of points determines a surface. The user uses a programmed PDA with a radio to communicate with the base unit.

Abstract: A measuring device generally comprises a base unit housing an extensible cable; the cable including a free end for placement by a user at a point being measured. The base unit, placed in line of sight of the point, includes: a base; a first carriage rotationally attached to the base about a turn axis; and a second carriage rotationally attached to the first carriage about a pitch axis. Servoed motors rotate the carriages to align them with cable path to the point. The turn angle, the pitch angle and the cable length are measured to determine the point's location. A plurality of points determines a surface. The user uses a programmed PDA with a radio to communicate with the base unit.

Abstract: A cable length sensor, in particular, a bowden cable displacement sensor, comprising a cable drum, a measuring cable wound on the cable drum and a return device at least lightly pre-tensioned in the start position, wherein the measuring cable may be withdrawn by rotating the cable drum against the force of the return device and by withdrawing the measuring cable the return device may be further tensioned. The return device is arranged in a housing, and coupling means for releasably coupling the return device to the rotating movement of the cable drum are provided so as to permit ready removal and replacement of the return device. Also, the housing may be provided with a sensor element operated from outside the housing for determining the current position of the return device, in particular the at least lightly tensioned starting position of the return device.

Abstract: A method and apparatus includes the coiling of an elongated article into a number of equal circumference coils through the provision of indicators spaced along a length of the article. Aligning the indicators of one set of indicators, a person can coil the elongated article into a first number of equal circumference coils and aligning the indicators of another set of indicators, a person can coil the elongated article into a second number of equal circumference coils. The first and second number of coils not being equal, i.e. the first number of coils may be four total coils and the second number of coils may be two total coils. The circumferences of the second number of coils being greater than the circumferences of the first number of coils, thereby allowing a person to choose how small or how large of a circumference of coil to create.

Abstract: An electronic measuring tape that includes a roller onto which the measuring tape is arranged to be wound up onto and wound out from through the roller being rotated, a first end of the measuring tape is attached in the roller, and where the roller is located inside a housing. A rolled up measuring tape is arranged in loops on the roller. All loops are in direct contact with the surface of the roller, an angle sensor is arranged at the roller to record an angle of rotation during rotation of the roller. An electronic circuit converts the angle of rotation into a length that corresponds to the length by which the measuring tape has been withdrawn from the housing, and the measuring tape records absolute values.

Abstract: A pivoting cable extension arm (2) has a pivot sensor (3). The extension arm is mounted on a swivel frame (4) having a swivel sensor (5). The swivel frame has two tangent sheaves (4A, 4C) that allow a wide pivot range of the extension arm. A cable take-up drum (6) has a range sensor (7) for sensing the length of cable (1) extending from the drum. The three-sensors (3, 5, 7) provide data for computing 3D coordinates of the end of the cable (1) over a wide range of space surrounding the assembly. This allows an object to be measured and modeled in three dimensions by touching the cable end to points on the object and acquiring spatial coordinates of the points.

Abstract: A length measuring instrument capable of measuring, displaying and recording the length around a part being measured by applying a measuring belt tightly to that part and operating the instrument by single hand. A rotary shaft disposed in a housing is provided with a spiral spring, the measuring belt, and an optical modulating section having a part for regulating the quantity of transmitted light. The belt is drawn out and applied tightly to the circumference of the part being measured. The rotary shaft is rotated forward when the belt is drawn out and rotated reversely by the recovering force of the spring to pull in the belt automatically thus, stretching and tensioning the belt. The light is converted into an optical modulation signal L depending on the rotation of optical modulating section and that signal is converted temporarily into a photoelectric conversion signal before being converted into an electric signal.

Abstract: An electronic measuring instrument includes a housing, a storage spool rotatably mounted to the housing, and a thin, flexible line provided on the storage spool and extendible from the housing for measuring distances. The storage spool is rotatable in a first direction for unwinding the line from the storage spool and a second direction for winding the line onto the storage spool. The instrument includes a rotatable drum in engagement with said line so that movement of said line causes movement of said rotatable drum.

Abstract: A measuring device includes a spool mounted in a housing having opposing front and rear ends. A string is wound about the spool, and has an end is attached to a marker located outside the housing. The string winds and unwinds relative to the spool upon rotation thereof. A rocker arm, which carries a first reference mark, is pivotally attached to a support attached to the housing at the front end thereof. The rocker arm carries a second reference mark, which can be aligned with the first reference mark by pivoting the rocker arm. A brake is mounted in the housing, which moves between a first position against the spool inhibiting its rotation, and a second position away from the spool permitting its rotation. The brake is biased for movement in its first position, and a handle is provided for operating the brake.

Abstract: The invention concerns a device comprising a flexible and non-elastic yarn divided by at least three retaining means fixed to predetermined locations and at least three fixing means adapted to support the retaining means and whereof the diameter of each fixing means is substantially equal to the internal diameter of the retaining means so as to position the yard along a direction perpendicular to that of the axis of the corresponding fixing means.

Abstract: An improved chalk line tip for a chalk-line. The tip having a string attachment portion, having a first end configured to receive a pivot pin therein and extending in a generally arcuately shaped configuration toward a second end, which is also configured to receive a pivot pin therein. The string connection body defining an aperture dimensioned to allow passage of a portion of the attachment portion therethrough. A surface attachment portion having various devices for attaching the surface attachment portion to a surface to be marked. The tip is configured to allow various configurations of the attachment device to be presented and attached to a surface to be marked thus allowing for increased applicability and utility upon a variety of surfaces.

Abstract: A chalk line tool is provided having a tear-drop shaped body which houses a chalk line spool and chalk for coating the chalk line and a handle connected to the body and acting as a reservoir for additional chalk. The reservoir feeds the cavity in the body. The flow of chalk is controlled between the reservoir and the cavity. The handle advantageously acts to maintain the operator's hands away from the hand crank used to retract the chalk line and provides an extended reach with the tool for improved ergonomics when using the tool. The chalk line tool can be manufactured with the handle or can be retrofit with parts which are supplied as a kit.

Abstract: A measuring device includes a spool mounted in a housing having opposing front and rear ends. A string is wound about the spool, and has an end is attached to a marker located outside the housing. The string winds and unwinds relative to the spool upon rotation thereof. A rocker arm, which carries a first reference mark, is pivotally attached to a support attached to the housing at the front end thereof. The rocker arm carries a second reference mark, which can be aligned with the first reference mark by pivoting the rocker arm. A brake is mounted in the housing, which moves between a first position against the spool inhibiting its rotation, and a second position away from the spool permitting its rotation. The brake is biased for movement in its first position, and a handle is provided for operating the brake.

Abstract: A digital measuring instrument includes a housing containing a measuring line, a rotatable drum engaging the line whereby movement of the line causes rotation of the drum, a storage spool mounted in the housing for storing the line, a crank assembly for rotating the storage spool for winding the measuring line about the storage spool, and a rotatable disc that rotates simultaneously with the measuring drum. The instrument includes an optical sensor in communication with the rotatable disk for compiling data related to rotation of the disk, and electronic circuitry in communication with the optical sensor for calculating a length of the line drawn from the housing. The housing has a well for receiving the storage spool and a side cover with a slideable lock for covering the well.

Abstract: A measuring device including a moveable measuring probe and sensors coupled to the measuring probe for providing position data of the measuring probe. The measuring probe is coupled, by a cord or a wire, to a first sensor for measuring a length or change in length of the cord or wire, and to a second sensor for measuring an angle or angular displacement of the cord or the wire. The obtained position data can be graphically represented and/or used for driving an automatic machining apparatus for producing a product corresponding to the measured data.

Abstract: A measuring cable travel sensor includes a housing accommodating a measuring cable drum and a rotary spring urging the cable drum in the direction of winding of a measuring cable thereon. At least one braking magnet is arranged either on the cable drum or on the housing to provide for magnetic control of the rotary movement of the cable drum at least in the cable winding-on direction. The cable drum may also carry holding magnets for holding the winding cable into close contact with the peripheral surface of the cable drum. The housing may also have a band extending at least in part around the cable drum for correctly positioning the cable thereon as it is being wound on.

Abstract: A measuring cable travel sensor comprises a measuring cable, and a cable drum for winding on and off the measuring cable. A spiral spring is arranged non-rotatably with the cable drum coaxially therewith, on the rotary trunnion of a rotary angle sensor for sensing rotation of the cable drum. The cable drum and the spiral spring are disposed in a housing which forms at least one mechanical internal space for same. The housing has at least two flat outside surfaces which are a right angle to each other. The housing parts are in the form of plastic injection moldings, and the sensor can be assembled very easily and quickly. The external configuration of the housing makes it possible to afford very many different possible ways of fixing it in position relative to the surrounding structure. The sensor is assembled by a method affording simplicity and speed.

Abstract: An apparatus for measuring the length of a conduit includes a fish tape having a housing and a spool disposed in the housing and a tape with markings along its longitudinal length. The spool is adapted for grasping and pulling the tape. The tape is forced through a conduit until the end of the conduit is reached at which time the length of the conduit is determined by noting the marking that appears on the tape where the tape first enters into the conduit. A method for determining the proper length of wire that is required and of simultaneously preparing the conduit for pulling the wire includes obtaining a segment of wire of a length that exceeds that of the marking that was noted and then attaching the wire to the end of the tape that was forced through the conduit. The spool is then grasped and pulled so as to urge the tape and the wire to pass through the conduit.

Abstract: A spacing device having a length of uniformly stretchable elastic cord pre-marked with equally spaced marks in a manner such that when the cord is stretched across a given span to be divided into equal spaces, the distance between any two marks will be equal to the distance between each of the marks on the cord within the span, thereby providing a quick reference of one or more equally spaced points within a given span. In one embodiment the elastic cord is wound about a reel, and in another embodiment, the cord may be dispensed from the reel. To divide a span equally by a given number of spaces, the elastic cord is adjusted elastically to provide the location of one or more of the points. To locate equally spaced points along a line, the elastic cord is adjusted elastically to provide the desired spacing and the location of those points.

Abstract: A measuring cable travel sensor comprises a housing accommodating a measuring cable drum and a rotary spring operable to urge the cable drum in the direction of winding thereon a measuring cable. A rotary angle sensor is mounted to the housing on the outside thereof. The rotary angle sensor has a sensor shaft with a projecting end trunnion portion. The cable drum is fixed on the sensor shaft trunnion portion non-rotatably in concentric relationship thereon. The travel sensor is of a compact structure, in particular in its axial direction, and simple and inexpensive to produce.

Abstract: A flexible rule rewinding device comprised of a front cover plate, a rear cover plate, a winding shaft, a center gear, two gears, a flexible rule reel mount, and a cover plate capable of rewinding long distance flexible rules rapidly and with little effort to thereby increase flexible rule practicality.

Abstract: A retractable tape measure having a flexible tape biased in a coiled position, and a housing sized to contain the flexible tape. The housing includes an opening through which a first end of the flexible tape extends, and a slot for positioning a locking mechanism. A tape biasing member operatively connects to the flexible tape to bias it in a retracted position. The locking mechanism controls the extension and retraction of the flexible tape from the housing. The mechanism includes a locking lever having a grip arm extending through the slot and a lock arm for contacting the flexible tape. A pin extends through the locking lever making the locking lever pivotable between an open position in which the flexible tape can move freely through the opening, a maintain position in which the flexible tape only exits freely through the opening, and a locked position to prevent the tape from moving relative to the opening. A lock biasing member biases the locking lever towards the locked position.

Abstract: A measuring cable travel sensor includes a housing accommodating a rotatable cable drum for winding a measuring cable on to and off same, and a spring for urging the cable drum in the winding-on direction. A rotary angle sensor is operatively associated with the cable drum. The housing at least partially includes a straight profile portion which is of uniform cross-section in its longitudinal direction. The spring can also be disposed in a spring casing portion substantially including a straight profile portion of uniform cross-section in its longitudinal direction.

Abstract: A device and method to quickly and easily layout various features of a basketball court, including the key area, free throw line, jump circle and three point line, in relation to the location of the backboard, including two cord-like members interconnected by a ring-like member having additional ring-like members at each end of the cord-like members. The cord-like members are flexible, facilitating easy transport and storage of the device, and inextensible. The various ring-like members can be colored or otherwise made to be distinguishable from each other to simplify the process of laying out the various basketball court features. A pivot tool is also provided to facilitate the user's use of the device. Additional cord-like and ring-like members can be provided to assist locating and designating the end and side lines.

Abstract: The invention is of a kit or system useful for guiding and facilitating the taking, tabulation and processing of measurements as pertain to scoring game animal according to established scoring rules. The kit or system includes a flexible cable which is used to record absolute lengths or distances needed for a proper scoring. The cable lacks cumulative length indicia or unit indications, but rather includes equally spaced incremental indicia which are used (by multiplying the number of indicia as rest between measurement endpoints) as part of the ultimate determination of length according to standard measurement units. A reusable score card is also provided which includes spaces for recording measurements and indicia for indicating the proper measurements to be taken as well as the sequence thereof and prescribed calculations to be made therefrom.

Abstract: A restraining assembly for use in conjunction with a linear transducer. The restraining assembly comprises a plurality of spaced apart magnets positioned on a stationary frame, where the magnets provide a reverse torque and restrict excessive rotational speed on a spool when a copper disc or equivalent magnetic flux medium is rotated at a close proximity to the face of the magnets. When a cable is suddenly released and allowed to freely return on the rotating spool, the restraining assembly restrains the high rotational speed at which the cable can accelerate when returning or retracting to the spool, such that the restraining assembly prevents the cable from self-destruction and/or damage to the linear transducer.

Abstract: A measuring cable travel sensor for detecting the position of a movable body and operable under differential pressure comprises a cable drum for winding on and off a measuring cable, a spring for prestressing the cable drum to wind on the measuring cable and a rotary position sensor for detecting the position of the cable drum. The sensor has a differential pressure chamber which is under the differential pressure and in which a cable eye for connection of the cable to the movable body is arranged, a cable chamber in which the cable drum is arranged and a spring chamber in which the spring is arranged. The differential pressure chamber communicates at least with the cable chamber and the spring chamber.

Abstract: A chalk line end is disclosed which includes a substantially flat base member having first and second tabs depending therefrom in order to form a substantially 90 degree angle to the base member. First and second points extend from the respective first and second tabs and are sized and shaped so as to press into the side surface of a board when the chalk line end is positioned over the board edge. This arrangement facilitates maintaining the position of the chalk line end as the chalk line is drawn off at an angle to the board edge. As an optional feature, a chalk line mount may be coupled to the base member by means of a swiveling connector, such as a rivet. This swiveling connection facilitates drawing the chalk line off at an angle from the board edge.

Abstract: A laser beam focus and alignment apparatus is provided for a focus engraving laser or the like and has a housing having an attaching portion for removably attaching to a laser apparatus over a laser beam output lens and a linear adjustable portion linearly adjustable relative to the attaching portion. A flexible plumb line has a predetermined length and is attached to the housing linear adjustable portion and has a plumb bob attached to the end thereof with a generally pointed end portion so that a laser beam focus and alignment apparatus can be attached to a laser beam apparatus and linearly adjusted until the plumb bob touches an item being focused upon to determine the focus and alignment of a laser beam. The housing attaching portion and linear adjustable portion can be threaded together so that rotating the linear adjustable portion moves it in a linear fashion to move the flexible bob line and bob.