Abstract: A veterinary table assembly having a support assembly and a table mounted to the support assembly. The table is operable to rotate with respect to the support assembly at least approximately 90 degrees between a first position and a second position. Preferably, the table is also operable to move vertically between a lowered position and a raised position. The table assembly also preferably includes a back panel mounted to the support assembly for restraining an animal on the table.

Abstract: A free ball bearing includes a retainer ball-pressing ring, the retainer ball-pressing ring including a substantially cylindrical pressing member inserted in an internal space between the semispherical recessed surface and the main ball toward the base end; the retainer ball-pressing ring being moved from a pressing position to a standby position along the unit center axis by the ring moving mechanism; the pressing member restricting or preventing rotation of the plurality of retainer balls by pressing the plurality of retainer balls when the retainer ball-pressing ring is at the pressing position; and the plurality of retainer balls of which the rotation is restrained or prevented by the pressing member being released when the retainer ball-pressing ring is at the standby position.

Abstract: A free ball bearing includes: a main body that has a ball retainer where a ball-retaining recess having an inner surface of a semi-circular recessed surface is formed; a plurality of retainer balls that is disposed on the semi-circular recessed surface of the main body and a main ball that has a diameter larger than the retainer balls and is rotatably supported through the retainer balls; a cover portion that surrounds the ball retainer of the main body while ensuring a predetermined internal space; a retained ball-pressing ring that has a ring-shaped pressing member that is inserted in between the semi-circular recessed surface of the main body and the main ball and presses the retainer balls, and is disposed to be movable in the internal space in the depth direction of the ball-retaining recess, between a pressing position where the retainer balls are pressed and a releasing position where the retainer balls are released; and a releasing mechanism that moves the retained ball-pressing ring from the pressing

Abstract: An exemplary rotatable positioning structure includes a first element and a second element. The first element includes a positioning track portion and defining a hole therein. The second element includes a pivot shaft engaging in the hole. The pivot shaft includes a through hole defined therethrough, a restriction portion and a positioning portion. The first element is restricted by the restriction portion of the pivot shaft. The positioning portion and the positioning track portion are capable of making the first element and the second element maintain a fixed position after relatively rotation therebetween.

Abstract: A supporting structure for geological sample drilling equipment having a minimal environmental footprint is disclosed. The structure consists of a platform on which drilling equipment can be positioned, and a plurality of legs extending from the platform to the ground. The legs are of variable length, which allows the platform to be set horizontally even on uneven ground. The platform includes a rotatable portion so that the drilling equipment can be easily rotated to a desired orientation.

Abstract: In a control method for a power assist apparatus, a pressing force acting on a workpiece held by a workpiece holding apparatus is detected, a determination is made as to whether or not the detected pressing force exceeds a preset threshold, a determination is made as to whether or not a dead man switch provided on the workpiece holding apparatus is ON, and a determination as to whether or not to release a rotation restriction applied to a joint portion for connecting the workpiece holding apparatus rotatably to an arm is made in accordance with a result of the determination as to whether or not the detected pressing force exceeds the preset threshold and a result of the determination as to whether or not the dead mean switch is ON.

Abstract: An operating table is shown, which comprises a table column with a column foot (10) and with a column head and also a bed connectable or connected to the column head, the column foot (10) having a floor-side baseplate (12) and a column-side footplate (14), the footplate (14) being mounted rotatably on the baseplate (12) and being secured, with a vertical play, by means of an abutment (24) against being lifted off from the baseplate (12), and at least one clamping cylinder (42) actuated by pressure medium being provided in order to tension the footplate (14) against the abutment (24).

Abstract: A shelf and swivel for supporting a shelf for rotation with respect to an underlying base, the shelf including an off-axis aperture, the swivel including a first member having a plurality of openings to receive fasteners for securing the swivel to the underlying base and a pair of downward projections straddling one of the openings. A second swivel member, coupled to the first swivel member for rotation about a vertical axis, is secured to a lower surface of the shelf so that the first member openings are serially accessible through the shelf aperture. A first fastener is installed through the shelf aperture and aligned first swivel member opening into the underlying base with sufficient force to embed the projections in the underlying base, thereby inhibiting movement of the first swivel member sufficiently to permit rotation of the shelf to serially expose additional first member openings to receive additional fasteners.

Abstract: A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. In one version, the mechanism includes a gerotor having three lobes, and the gerotor guide has a guide profile including four recesses for receiving the lobes of the gerotor. Rotation is governed by a 4:3 hypocycloid function. The profiles of the gerotor and the gerotor guide are expanded uniformly from an original hypocycloid pattern so that rotation of the turntable results in execution of the hypocycloid function while retaining the gerotor in controlled contact with the profile of the gerotor guide. A reciprocal of the hypocycloid function yields a “cloverleaf” gerotor. Substantially planar bearing surfaces may be used at the interface of (a) the turntable and the gerotor guide, (b) the gerotor and the gerotor guide, or (c) the gerotor and the underlying support surface. The gerotor guide and turntable may be part of a cabinet or built into a kitchen countertop.

Abstract: A gerotor mechanism is used to guide the rotation of a turntable having a Reuleaux triangle shape. The mechanism includes a gerotor having three lobes; the gerotor guide has a guide profile including four recesses for receiving the lobes of the gerotor. Rotation is governed by a 4:3 hypocycloid function. The profiles of the gerotor and the gerotor guide are expanded uniformly from an original hypocycloid pattern so that rotation of the turntable results in execution of the hypocycloid function while retaining the gerotor in controlled contact with the profile of the gerotor guide. Substantially planar bearing surfaces may be used at the interface of (a) the turntable and the gerotor guide, (b) the gerotor and the gerotor guide, or (c) the gerotor and the underlying support surface. The gerotor guide may be part of a cabinet or built into a kitchen countertop.

Abstract: The disclosure provides a material turn table for supporting objects to be worked on. The material turn table includes a placement plate upon which objects are placeable; a supporting plate; and a support assembly that connects the placement plate to the supporting plate in such a manner that the placement plate is rotateably supported above the supporting plate. The support assembly includes an annular first pipe connected to the placement plate and an annular second pipe connected to the supporting plate. A portion of a length of the first pipe is disposed telescopically relative to the second pipe. An annular bearing assembly connects the small pipe to the large pipe.

Abstract: A computer keyboard/mouse support apparatus including a keyboard support having three layers which are rigidly sandwiched together is disclosed. The top layer is for supporting a keyboard while the bottom layer is for attachment to a keyboard arm. The center layer has a surface area which is substantially less than that of the top and bottom layers so that it defines a gap in which left and right mouse extensions pivot between extended usable positions and retracted stored positions. In their extended usable positions, the front edges of the keyboard support and the mouse extensions are flush with each other and define an ergonomic curve. The top surface of each mouse extension also preferably frictionally engages the underside surface of the keyboard support so that the extensions are not easily moved by the user when moving a mouse supported on the surface of the extension.

Abstract: Free-standing table device wherein the table top (1) arranged in the horizontal plane, is double-hingedly connected to a frame (4) which is arranged to stand, possibly on wheels (5), on an underlying base.

Abstract: A wheelchair swivel platform that allows a standard, unmodified wheelchair or other non-swiveling chair and an occupant to swivel about an area of a workstation, in much the same way as a modem swivel office chair. The wheelchair swivel platform includes a top plate 16 and a bottom plate. The bottom plate serves as a base for the platform which lies on the floor to support the top plate 16. The top plate 16 swivels about the bottom plate while supporting the wheelchair. A rotation locking device prevents rotation of the platform during positioning of the wheelchair on and off the platform.

Abstract: A compound miter saw includes a unique table assembly which incorporates an orientation system for a group of wear plates and a three position lock system. The wear plates between the table assembly and the base of the miter saw have a different configuration at each end which requires them to be assembled in to the table saw with any burred edge being positioned away from the table assembly. The lock system incorporated into the table assembly is movable between three positions. The first position locks the table to the miter saw. The second position permits rotation of the table with a spring loaded detent system releasably locking the table at various miter angles. The third position permits rotation of the table with the spring loaded detent system being disengaged providing free movement of the table.

Abstract: An improved rotational cake decorating apparatus, commonly known as a Lazy Susan, used in the decoration, display and service of cakes. Said improved rotational cake decorating apparatus has a novel gripping means disposed thereon for improved rotational control. A donut shaped apparatus with a novel gripping means disposed thereon to be fixably attached to an existing rotational cake decorating apparatus. Said donut shaped apparatus with said novel gripping means provides for improved rotational control of said existing rotational cake decorating apparatus. A radial extension apparatus with a novel gripping means disposed thereon that can be removably attached to an existing rotational cake decorating apparatus. The radial extension apparatus provides a larger surface for supporting a work product such as a cake whereby the surface for supporting a cake on the existing rotational cake decorating apparatus is increased allowing for the decoration of larger cakes.

Abstract: A side-by-side robot workcell includes two tables each of which is movable from a work position to a load position. Linkages are connected to the tables and cause the tables to have a slow speed at the time the tables approach either the load or the work position, and a faster speed in the middle of the movement between the work and load positions.

Abstract: A magnetized craftsman's turntable apparatus has an armrest. A magnet is embedded in the rectangular turntable for holding the metal templet over a paper sheet. The craftsman's arm can be resting on the immovable armrest as the templet is rotated for cutting designs in the paper sheet.

Abstract: The present invention is a cart assembly comprising a top portion which is adapted to be removably secured to a lower portion. The top portion includes a rotatable table, known as a lazy Susan and secured to the rotatable table is a lock device, which enables the rotatable table to lock in a fix position when desired by the user. A removing device allows for the top portion to be removably secured to the bottom portion. This will render the top portion, when removed, to act as a tray for adequately and efficiently transport the finished product and to prevent handling by the user to intrinsically reduce damage thereto. The lower portion includes a plurality of legs. The legs, preferably includes lockable wheels to provide conveyance of the assembled assembly, when the top portion is secured to the bottom portion, or solely the bottom portion. The lower portion supports the top portion and is designed to aid the user.

Abstract: An apparatus includes a support surface and a moving mechanism for automatically varying the orientation of the support surface in a predetermined manner over time to reduce or eliminate the likelihood of repetitive stress injury as a result of performing repetitive tasks on or otherwise using the support surface. By varying the orientation of the support surface, e.g., by moving and/or rotating the support surface over time, repetitive tasks performed on the support surface are modified at least subtly to reduce the repetitiveness of the individual motions performed by an operator.

Abstract: A multi-level rotational shelf structure including top and bottom suspension tubes fastened to the surface of a wall with a plurality of shelves between the suspension tubes. Each shelf is supported on a bushing assembly which enables each shelf to pivot about an axis between the top and bottom suspension tubes independently of the other shelves. An upright tube extends between adjacent shelves acting as a spacer and a mount for the bushing assemblies.

Abstract: A method of assembling electronic equipment using a work station which comprises a rotatable work surface, a fixed work surface and a support frame. The rotatable work surface is rotatably mounted to the fixed work surface which is, in turn, mounted to the support frame. The work station includes a locking mechanism positioned between the rotatable work surface and the fixed work surface for adjusting the rotational orientation of the rotatable work surface. The rotatable work surface and the fixed work surface are both made of an electrostatic discharge (ESD) safe material.

Abstract: A combination cremation urn display pedestal and cremation remains container comprises a decorative upstanding support, a turntable assembly mounted at an upper end of the support adapted to rotatably display a cremation urn thereon, and an openable and closable compartment adapted to contain cremation remains therein forming a part of the support. In a second aspect, a combination cremation urn display pedestal and cremation remains container comprises a decorative upstanding support adapted to display a cremation urn thereon, a light source within the support adapted to illuminate the cremation urn on the support, and an openable and closable compartment adapted to contain cremation remains therein forming a part of the support.

Abstract: A table for recreational vehicles has an inverted L-shaped support member comprised of a vertical arm and a horizontal arm. The vertical arm has a lower end and the horizontal arm has an outer end. A pivotal support element is mounted on the lower end of the vertical arm to permit the support member to pivot about a vertical axis. A horizontal table top is pivotally secured at its lower center portion about a vertical axis to the outer end of the horizontal arm. The table has a primary central table surface having side edges, and secondary table surfaces hingedly secured to the side edges so that the secondary table surfaces can be moved to an outwardly extended horizontal position during operation, and can be folded on top of the central table surface for storage purposes.

Abstract: The present invention provides a uniquely position adjustable ophthalmic instrument support table for use in conjunction with an examining chair and a lighting system which allows the user to program the desired room lighting independently for each of several inputs such as instrument switches, examination lights or other electrical devices used during an ophthalmic examination. The ophthalmic instrument support table includes a base unit and a table top mounted to the base unit by support structure allowing four degrees of freedom to adjust the location of the table top with respect to both the patient seated in the chair and the doctor examining the patient on the opposite side of the table. The lighting control system allows one or two circuits of room lights to be adjusted in intensity and to have this adjustment automatically recalled to set the programmed room lighting condition upon activation of the input.

Abstract: Disclosed herein is a table comprising a base, a table surface, and a mechanism for controlling the movement of the table surface relative to the base. The table surface is movable between a retracted position, in which the table surface is generally horizontally disposed above and adjacent the base, and an extended position, in which the table surface is generally horizontally disposed above the base and a major portion of the table surface resides forwardly of the base. The mechanism is mounted to a table base and a table surface. The mechanism has a front pivot link, pivotally interconnected to the base at a first pivot, and a rear pivot link, pivotally interconnected to the base at a second pivot link. The mechanism is mounted to the surface at the upper portion of the front pivot link at a third pivot, and at the upper portion of the rear pivot link at a fourth pivot. The mechanism is configured such that it can be mounted inboard of the table base end panels.

Abstract: A lightweight turntable for use in manipulating printing paper rolls of 1,500 pounds in weight or more is disclosed. The device includes a stationary base plate having one or more circular bearing raceways formed therein. A rotatable upper plate having matching raceways is fitted to the base plate with a plurality of ball bearings positioned in the upper and lower race tracks. The upper plate includes a raised circular bead or an elevated surface to direct the loading of the paper roll from the peripheral edge of the stationary base to provide easy turning of the roll. The device is manually carried and spotted at selected turning locations, as needed, to move a paper roll to a desired location.

Abstract: Tables having a table top that is movable between a closed position atop the table base and an open position forward and above the table base are disclosed. Certain table embodiments have swivel means to permit rotation of the table top about an axis of rotation normal to the table surface. Others include mechanisms for moving the table surface between the open and the closed position that are sufficiently compact as to be suitable for use with a large majority of coffee table and end table styles.

Abstract: A rotary drive mechanism, which is capable of precisely controlling the rotational angle of an output shaft or a rotor. In the rotary drive system of the present invention, a first moving guide is provided in parallel to first guides, each end section of the first moving guide is movably connected to second guides. A second moving guide is provided in parallel to the second guides, each end section of the second moving guide is movably connected to the first guides. A moving body is capable of moving on the first and the second moving guides. A first motor moves the moving body in the first direction, and a second motor moves the moving body in the second direction. A lever rotates an output shaft when the moving body moves round the output shaft, an outer end section of the lever is rotatably connected to the moving body and capable of moving in the longitudinal direction with respect thereto, an inner end section of the lever is fixed to one end of the lever.

Abstract: An ironing board apparatus includes a horizontally oriented ironing board mounted on an arm such that the ironing board continuously pivots about a first vertical axis spaced near a distal end of the arm, which, in turn, continuously pivots about a second vertical axis spaced near the other or proximal end of the arm such that the ironing board apparatus is angularly displaceable to and from a stored configuration and an operative configuration. The components interacting at the first and second axes are friction fit to resist forces and moments created during use of the ironing board apparatus. The ironing board apparatus includes a vertical supporting post with an encircling collar for adjusting the height of an ironing board thereof. The ironing board apparatus includes an accessory tray mounted on an underside of the ironing board. The invention also comprises a kit for using an existing base cabinet for the ironing board apparatus.

Abstract: A device for moving a patient in a bed includes a base member adapted to be supported by the bed. The device further includes a patient support member interconnected to and supported by the base member. The patient support member is rotatable with respect to the base member to enable movement of a patient between a supine position and a sitting position.

Abstract: A coarse/fine adjustment of a rotary body, comprising: a worm wheel fitted to a rotary shaft of a rotary body; a worm meshing with the worm wheel and having a first screw; a rotary driving shaft having a second screw engaging with the first screw and rotated by a manipulation member and a switching means for effecting a switchover to rotationally or rectilinearly move the worm engaging with the rotary driving shaft. The worm is biased by a biasing means to mesh with the worm wheel while keeping a thrust state.

Abstract: A rotatable holding rack to facilitate the process of cleaning reusable washable cartridge filters, such as those filters commonly used with swimming pool filtration systems. A vertically positioned cartridge filter is securely mounted onto a rotatable wash rack and is held in a stationary mode as the frontally exposed area is washed clean by a hand-held jet-nozzeled water hose. The filter unit is then revolved to the next selected frontal exposure, by rotating a finned circular flat platform to which the filter unit is attached, by redirecting the water-force of the hand-held hose to rotatable platform fins.

Abstract: A rotatable betting device is provided for a card game which consists of a turntable assembly to sit upon a flat surface. A plurality of cups are radially positioned about the turntable assembly, so that each card player can conveniently place bets by inserting chips into their respective cup during the card game.

Abstract: An apparatus (10) for movably mounting equipment (11) on a wheelchair (12) having an armrest (12a) and a back support (12b), which comprises first and second pivot assemblies (20, 21), a longitudinal body member (40) spacing and joining the first and second pivot assemblies (20, 21) and rotatable about a fixed axle (50) of the first pivot assembly (20). There may also be provided a device (22) to attach the fixed axle (50) to the wheelchair (12), a rotatable axle (51) in the second pivot assembly (21) supporting the equipment (11), and an assembly such as pulleys (80, 81) and a cable (83) for rotating the rotatable axle (51) as a function of the rotation of the body member (40) relative to the fixed axle (50).

Abstract: A rotating device possesses a fixed portion and a movable portion equipped with a rotary shaft, and is equipped with a rotor that can be fastened in an integrated manner to the rotary shaft via a fastening device. Said rotating device is composed of a driving device which directly rotates the rotary shaft, a fluid bearing device which reduces the friction between the fixed portion and the movable portion, a disk provided on the movable portion which is elastically deformable in the direction of thrust, a clamping device provided on the fixed portion which stops the rotation of a turntable by clamping the disk, a positioning jig which makes fine changes in the position of the rotor in the radial direction with respect to the rotary shaft, and a monitoring device which monitors the status of rotation of the rotor.

Abstract: A rotary stand having a base and a turntable connected in a slidable manner at their respective circular faces by a connecting member inserted into an axis and a spacer which has a projection fitted to the outer periphery of the axis inserted into an elongated hole of the turntable, so that the projection is restricted to turn within the elongated hole, while being permitted to turn only in a predetermined area within the guide groove of the base.

Abstract: A seat body comprised of a shell is articulated on a base adapted for attachment to a passenger vehicle seat. The base has a wall with a circular opening within which an upper plate and a lower plate are attached to form a swivel assembly. The swivel assembly includes a hub that rests against the edge of the wall delimiting the opening, and two flanges resting respectively above and below the wall. A spring biased lever is provided to lock the swivel assembly rotationally relative to the base.

Abstract: Foundry equipment (1) has a plurality of moulding tables (2) arranged radially on a carousel (3). A central work station (5) is provided for a machine operator (6) having access to control means (17, 10-12) to rotate the carousel (3), and hence the tables (2), in a selective manner beneath a discharge head (13) of a resin and sand mixing machine (14).

Abstract: A turntable device for audio and/or video units, floodlights, flower pots, showpieces, etc. In particular, the invention relates to a turntable device preferably having a circular base plate placed upon a base, with a circular bearing race extending on the top side of the base plate near its outer periphery. A concentric bearing ring is placed on the bearing race, for example in the form of a ball bearing ring, with a turntable having a circular bearing race extending on its underside near the outer periphery of the turntable. The turntable is concentric with the base plate to allow the turntable to turn about a common center axis. In accordance with a preferred embodiment of the invention the turntable device is also provided with a second bearing arrangement which is coaxially disposed relative to the center axis and near to the common center axis of the various parts.

Abstract: A swivel table, particularly for carrying a telephone, comprises a swivel column, which is provided at one end with a foot part, which is adapted to be secured to a carrying structure, and is provided at its other end with a head part, to which an outwardly and downwardly inclined swivel arm is connected, which carries an adjustable swivel table top. In order to reduce the manufacturing costs and to increase the stability and to ensure a more convenient use of the swivel table, the head part is rigidly mounted on the swivel column and is provided with an outwardly and downwardly inclined telescopic swivel arm, which is adjustable in length.

Abstract: A rotary table (10) provided as a seat for a handicapped person consists of a bottom plate (12), a cover plate (14), a cushion mat (16) and a fastening ring (18). The cover plate (14) is mounted for rotation at the bottom plate (12) and is in sliding contact therewith. The cushion mat (16) is removably fastened at the cover plate (14) by the fastening ring, which is composed of a plurality of identical ring segments (19) which are individually locked at the cover plate (14) and can be removed by manually exerting a lifting force thereon. All components of the rotary table (10) can be separately cleansed and re-assembled thereafter without needing tools.

Abstract: A spring-powered turntable for use in a microwave oven includes microwave energy responsive assembly for automatically permitting rotation of the turntable when microwave energy exposure begins and for automatically turning off rotation of the turntable when microwave energy exposure ceases. The microwave energy responsive assembly can be located between a rotating part of the turntable and a non-rotating part of the turntable. The microwave energy assembly can include a material that expands or contracts when exposed to microwave energy and serves to control a brake for braking the rotating part of the turntable.

Abstract: A rotatable drafting table includes a flat base board; a top drafting board position on top of the flat base board, the drafting board having a substantially rectangular configuration with slightly rounded corners; a swivel arrangement secured to the base board and drafting board for rotatably securing the drafting board on the base board; the base board having slide extensions at two front corners thereof; four pins provided at the free ends of the slide extensions and the opposite two corners of the base boards; a wire secured around the four pins; a parallel slide slideably mounted on the wire and positioned above the drafting board; and a braking assembly including at least one rubber brake pad secured at an underside of the drafting board for movement into braking contact with the upper surface of the base board.

Abstract: A patient support system for irradiation therapy or treatment simulation comprises a main arm 1 on a sub-floor mounted pivot 10 about a first vertical axis 17, which supports a further arm 49 rotatable about a second vertical axis 16. At the other end of the arm 49 a vertical pillar 4, pivotable about a third vertical axis 15, supports a vertically displaceable carriage 3 on which a patient support table top 2 is directly mounted. A control system is described which enables x, y coordinate command values to control respective drives associated with the three vertical axes to position a patient quickly and accurately relative to the treatment isocenter. The system requires only a shallow well while providing a large range of vertical lift. Furthermore, no sub-table x-y carriage is required increasing patient accessability.

Abstract: A stand for aiding a worker, such as a cake decorator, to have selective access from a single work position to all surfaces of the product being worked upon, where the product has multiple tiers of different heights and widths, is provided by a movable product-supporting table that is independently selectively rotatable and/or vertically movable relative to a support for the table. Structure is provided whereby the support table is selectively rotatable about a vertical axis and provides selective vertical movement of the table relative to the support.A simple, selectively manually-actuatable clamp is available to the worker to selectively control whether the product-supporting table will be only rotated about its vertical axis, or will be also movable vertically by selective rotation of the support table.The stand is mounted on a wheeled dolly which permits moving both the stand, and the product supported thereon, to selected locations.

Abstract: Portable turntable and drive motor assembly for use in microwave ovens. The drive motor assembly is positioned to one side of the turntable platform and has a low profile so that it will not interfere with the rotation of overhanging objects on the platform. In the principal embodiment disclosed, the drive motor is spring powered.

Abstract: A mounting head for apparatus to be orientated, such as a camera, comprises a base, a drive contained in the base, a platform mounted on the base for rotation by the drive, a mounting module for mounting the apparatus to be orientated, mechanical fixing means on the platform and mating mechanical fixing means on the mounting module for releasably securing it to the platform, a fixed electrical input in the base, an electrical socket in the platform and a plurality of electrical connections between said electrical socket and said fixed electrical input which are maintained during rotation of the platform relative to the base; the mounting module further comprising an electrical connector matching the platform electrical socket which provides electrical connections to an electrical output in the mounting module.

Abstract: A rotatable drafting table includes a flat base board; a top drafting board position on top of the flat base board, the drafting board having a substantially rectangular configuration with slightly rounded corners; a swivel arrangement secured to the base board and drafting board for rotatably securing the drafting board on the base board; the base board having slide extensions at two front corners thereof; four pins provided at the free ends of the slide extensions and the opposite two corners of the base board; a wire secured around the four pins; a parallel slide slideably mounted on the wire and positioned above the drafting board; and a braking assembly including at least one rubber brake pad secured at an underside of the drafting board for movement into braking contact with the upper surface of the base board.

Abstract: A tapping attachment particularly adapted for use with machines under numerical computer control. The attachment embodies tension cushion for the spindle by way of a tension spring as well as compression cushion for the spindle. The compression cushion is provided by way of an adjustable spring member which is in a bore of the spindle and which has a helical spring formed in it. The tension spring is on the inside of the compression spring member. The attachment as a whole is of relatively short overall length, adapting it for use in an automated system wherein attachments are automatically inserted in the machine and interchanged. The attachment embodies a hard start feature provided by way of releasable securement which will release the spindle for movement in response to predetermined axial force, so that in the case of a dull tap the automated movement of the attachment under computer control will be kept accurately programmed.