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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7234376 | Holding device for a fastening element A holding device for fastening elements which is securable to screw-driving power tool and includes at least two clamping members (20) which abut a stem (74) of the fastening element in a release position of the clamping members and which are displacea... | 06/26/2007 |
| 6959580 | Sheet metal bending brake A sheet metal bending brake having a frame with a planar work supporting surface and a plurality of spaced frame members extending over the work support surface. Each frame member has a throughbore and these throughbores are aligned with each other. A plurality of e... | 11/01/2005 |
| 6883794 | Adjustable positioning device An adjustable positioning device used to position a work piece on a work platform is provided. The adjustable positioning device includes a base which is coupled to the work platform and has multiple sockets, and a supporting frame which has multiple slots. The supp... | 04/26/2005 |
| 6685177 | Clamping locator A clamping and locating fixture includes a hollow body, a pin or angled plate mountable to the body, a locking arm positionable within the body locatable between two positions and a drive pin moveable within the body to engage the locking arm. A workpiece... | 02/03/2004 |
| 6655673 | Power clamp mechanism A power clamp apparatus, comprised of, a single metal body with an interior cavity running there through, a unit assembly which is inserted into said interior cavity, and said unit assembly including, a piston for slidable back and forth movement within s... | 12/02/2003 |
| 6641123 | Clamp apparatus A clamp apparatus comprises a toggle link mechanism which converts rectilinear motion of a rod member into rotary motion, an arm which is rotatable by a predetermined angle in accordance with a driving action of a cylinder section, and a lock mechanism wh... | 11/04/2003 |
| 6557841 | Over-center power clamp toggle mechanism A rotary clamp having a linkage assembly that provides an over-center condition for providing high actuation and clamping forces without excessively wearing the components of the linkage assembly. The linkage assembly is connected to a linear actuator for... | 05/06/2003 |
| 6431536 | Adjustable guide system for jaws of fluid-operated grippers A gripper is provided with a body with a top part having at least one pair of parallel wings delimiting between them a channel for guiding at least two jaws. At least one wing (14) on one side of the channel is interrupted in the center (22), elasticized ... | 08/13/2002 |
| 6206355 | Clamp clips with rotational and displaceable tension elements A clamp (10) having at least one clamping assembly (11) comprising a base plate (17) and a pair of tension elements (14, 15), the base plate (17) including a pair of oblong holes (16) which converge towards a central line, each of the two tension elements... | 03/27/2001 |
| 6199846 | Electric power operated clamp with spring lock A clamping apparatus includes a housing and a pivot pin mounted for pivoting movement about an axis of rotation with respect to the housing. A clamp member is connected to the pivot pin and is moveable between a clamped position and a released position in... | 03/13/2001 |
| 6115898 | Force multiplying apparatus for clamping a workpiece and forming a joint therein A force multiplying apparatus employs a pivoting clamping arm motion and then a subsequent linear clamping arm motion. A slotted swing arm and a slotted drive link are pivotably and slidably mounted to a relatively fixed body. A toggling action and coinci... | 09/12/2000 |
| 6105947 | Low profile pneumatic retractor clamp A low profile fixture clamp which provides a clamping force in two perpendicular directions through the motion of a pneumatic cylinder in a single plane. The principle component of the clamping force is a horizontal force in-line with the force generated ... | 08/22/2000 |
| 6003850 | Electric power operated clamp A clamping apparatus includes a housing and a pivot pin mounted for pivoting movement about an axis of rotation with respect to the housing. A clamp member is connected to the pivot pin and is moveable between a clamped position and a released position in... | 12/21/1999 |
| 5791222 | Tool for cutting an open-profile setion, particularly a gutter A tool including two flat parallel flanges (2 and 3), defining between them a space (4) which corresponds to the thickness of a cutting blade (5) and including two symmetrical slots which have profiles that are roughly identical to that of a gutter (7) so... | 08/11/1998 |
| 5513836 | Clamping device for holding doors, panels and the like in an upright position A clamping device is disclosed for holding doors, panels and similar generally planar workpieces in an upright position while the device is attached to a stationary or movable support. Automatic clamping of a workpiece is accomplished by placing the workp... | 05/07/1996 |
| 5490663 | Slide actuated holding clamp A slide actuated holding clamp for holding a connector stationary while a push test or pull test is performed on a conductor secured to the connector. The clamp comprises a main body portion having an opening formed therein, a locking member adapted to fi... | 02/13/1996 |
| 5484222 | Apparatus for gripping a pipe An apparatus for gripping a pipe, which apparatus comprises an outer member having a first inclined inner surface, and an inner member having a first inclined outer surface, the arrangement being such that, in use, on rotation of said outer member relativ... | 01/16/1996 |
| 5378970 | IC carrier capable of loading ICs of different sizes thereon An IC carrier for loading ICs of different sizes thereon includes a spiral disk provided in a box-shaped frame member and a plurality of IC support members engaged with a spiral grove of the disk. Rotation of the spiral disc causes the IC support members ... | 01/03/1995 |
| 5350163 | Clamp with pivoting and sliding jaws A clamping member (11) for a wood clamp (10) is provided and comprises two spaced engaging elements (14, 15), each shaped as right oval cylinders. The engaging elements are rotatably mounted to a support plate (17) and are arranged to slide relative to su... | 09/27/1994 |
| 5277411 | Slide actuated holding clamp A slide actuated holding clamp for holding a connector block stationary while a push test is performed on a conductor secured to the connector. The clamp comprises a body portion having a bore extending longitudinally therethrough and a portion forming a ... | 01/11/1994 |
| 5269502 | Clamping head assembly A clamping head assembly for clamping frame members in an underpinning machine includes a pair of clamping members each of which has upper and lower elements spring biased apart. The lower element carries a friction pad and is connected by a pin and slot ... | 12/14/1993 |
| 5244195 | Clamping fixture A clamping fixture (10) for releasably clamping a workpiece (12) to avoid damage to the workpiece comprises a support (40) having a pair of arms (60,62) mounted thereto for rotation to and from each other. Each arm has a jaw assembly (68,70) spring-biased... | 09/14/1993 |
| 5193789 | Automatic clamping apparatus Apparatus for releasably clamping a range of sizes of complex shaped articles having an upright web and laterally disposed upper and lower flanges. A first set of upper and lower flanges of an article placed on a work platform extends towards a first edge... | 03/16/1993 |
| 5174489 | Electrically-driven cam-actuated tool clamp A mechanical clamping device adapted to engage and secure the upper tooling of a welding knee. The clamping device is motor driven such that several clamping devices can be simultaneously and synchronously operated to engage, align and secure the upper to... | 12/29/1992 |
| 5169132 | Workpiece handler Substrate handling apparatus includes a trigger handle which forms a trigger-like mechanism with a handle grip. The trigger handle is interconnected with activation means such that application of pressure on the trigger handle activates the activation mea... | 12/08/1992 |
| 5121863 | Rack for telephone hand set A rack on which a telephone hand set is deposited in a vehicle includes a planar center part (17) with a flange part (16,16') on one end, and clamps (5,7) protruding from the center part (17), which can move between two extreme positions. On the center pa... | 06/16/1992 |
| 5060958 | Power drive and transmission unit for self centering clamps and chucks A power drive and transmission unit for self centering clamps and chucks has a housing with a cylindrical bore and a piston which is rotatably mounted therein and is acted upon by two linear operating, piston cylinder drives to obtain rotation of the rota... | 10/29/1991 |
| 5034621 | Inductive proximity switch exhibiting magnetic field immunity A proximity switch assembly (10) for signaling the location of a movable member (36) at either of opposite end limits of movement relative to a stationary frame (44, 46) includes a compact elongate housing (58) adapted to be mounted on the frame to extend... | 07/23/1991 |
| 4934104 | Cone tail chuck apparatus, and a method for using the same apparatus A cone tail chuck apparatus for chucking a conical body comprising: a plurality of abrasive stones arranged in a circle; a first drive device for causing the abrasive stones to spin; a second drive device for causing the abrasive stones to move centripeta... | 06/19/1990 |
| 4876782 | Apparatus for attaching a glide to a chair leg A fixture engages each leg of a chair leg assembly to support each leg against longitudinal displacement along respective leg axes. A ram and associated drive member are mounted opposite each leg free end so that each ram axis is substantially aligned wit... | 10/31/1989 |
| 4784377 | Apparatus for locating and supporting ceramic substrates A ceramic substrate is held in position, while being processed, by vacuum. The substrate is positioned on an intermediate plate and held down by a vacuum. The intermediate plate is supported on an air bearing while being moved into correct location on a s... | 11/15/1988 |
| 4778163 | Air actuated clamp A pair of air cylinders are provided on the stand for holding a printed circuit board. A first jaw includes a sleeve having spiral slots at opposite ends which register with straight slots in sleeve sections on a second jaw and pins carried on an air cyli... | 10/18/1988 |
| 4730511 | Valve actuating mechanism A mechanism for actuating a non-slidable disk type valve, which comprises a hollow cam body having a specific guide groove and axially slidable without rotation within a stationary casing, a cam follower relatively movably engaged with the guide groove an... | 03/15/1988 |
| 4667531 | Cam mechanism A cam mechanism includes a continuous rotary shaft connected to a drive source, a cam fixed on the rotary shaft to convert each continuous rotation motion of the rotary shaft to a compound horizontal and vertical motion, and an output member coupled with ... | 05/26/1987 |
| 4667805 | Robotic part presentation system The invention is a robotic parts presentation system for delivering a workpiece into a work envelope of an industrial manipulator. This system also centers the delivered workpiece about the centerline of the workpiece in the X and Y axes directions thereo... | 05/26/1987 |
| 4666138 | External reforming pipe clamp A pipe clamp for use in welding together a pair of pipe sections having confronting ends adjacent one another comprises arcuate jaws together forming a generally circular body of such diameter as to encircle the pipes with adjacent ends of the jaws spaced... | 05/19/1987 |
| 4664364 | Proximity switch assembly A proximity switch assembly for signalling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a compact elongate housing adapted to be mounted on the frame to extend along the path of move... | 05/12/1987 |
| 4653162 | Assembly and method for coining a precision corner break on an oil metering flat A method for coining a precision corner break on an oil metering flat for a rotor of a power steering rotary valve is provided. The method comprises the first step of placing a workpiece to be coined in a first floating position set by a clamping and orie... | 03/31/1987 |
| 4622123 | Device for compressing a pair of plates A device for compressing a pair of plates composed of a slotted post extending upright from one of the plates, arranged to pass through a port in the second of the plates, and a circular ramp member rotatably attached to the second of said plates, which r... | 11/11/1986 |
| 4618131 | PC board hold down system A hold down system for use with a generally planar printed circuit (PC) board includes at least one clamp which engages the circuit board and securely maintains it flat upon a circuit board transport mechanism to facilitate the insertion of electronic com... | 10/21/1986 |
