William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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| Number | Title | Issue Date |
| 5345984 | Pin router apparatus A router having a rotary bit is mounted on a table in a position to enable the bit to engage a workpiece on which is secured a template having a configuration corresponding to that to be duplicated on the workpiece. A template follower overlies and confro... | 09/13/1994 |
| 5205331 | Tension reducer for a power tool drive apparatus A tension reducer for a tension controller for use on a power tool such as an inverted router. The router has a drive motor, a motor driven pulley, a router bit-carrying spindle moveable between a lowered inoperative position and an raised cutting positio... | 04/27/1993 |
| 5036895 | Wood copying machine A copying machine has a sliding table slidable on a board. A pattern plate and a work piece are clamped on the sliding table by a clamping device. A cantilever arm is pivotally coupled on the board. A motor is fixed to the body. A casing is pivotally coup... | 08/06/1991 |
| 5009013 | Device in machines for the marking of workpieces The present invention provides a device to be used in machines which mark workpieces with characters or other symbols and have marking tools for applying the symbols to the workpiece, and elements for selecting the symbols and controlling the movements of... | 04/23/1991 |
| 4991637 | Trimmer apparatus and method A trimmer apparatus and method for utilizing the same is presented which includes a cutting assembly formed from a quadrangular frame which is pivotally joined to a stand and a laminated object is moved therealong on a support in a lineal path whereby the... | 02/12/1991 |
| 4893661 | Drive belt tension control apparatus for inverted rooter An inverted router characterized by having a drive motor, a motor driven pulley, a spindle drive pulley and a drive belt for transferring power from the motor driven pulley to the spindle and drive belt tension control apparatus. The drive belt tension co... | 01/16/1990 |
| 4733997 | Method of producing chair mats and the like involving edge trimming An apparatus and method for forming a workpiece or chair mat with cleats on the underside thereof, and with a marginal peripheral area void of cleats, and for trimming the edge of a generally planar workpiece. A rotatable work table is provided for positi... | 03/29/1988 |
| 4718798 | Elastically connected, two-part tool support, particularly for a robot This invention relates to a tool support, particularly for a robot, of the type comprising two parts connected together by an assembly of elastic plates which, at rest, are disposed tangentially to a circle concentric to a reference axis of said robot wit... | 01/12/1988 |
| 4644701 | Hand operated grinding wheel with surface area and depth control The shaft of a jet engine is reworked by removing the original plating, and the plating adjacent the oil hole in the shaft is removed by a hand grinding operation. The hand grinder includes means for supporting the grinding wheel with means for controllin... | 02/24/1987 |
| 4624609 | Apparatus for milling sign cutouts and letters from templates A router is coupled to a pair of pivotally connected arms for free swinging movement about a horizontal plane in a space between a template and a workpiece. The router has an upwardly extending guide pin that is engageable with the template and a downward... | 11/25/1986 |
| 4588338 | Follower mechanism and control for rotary metal removing tools A mechanism and control for mechanically moving a rotary metal removing tool such as a milling cutter or grinder in a path determined by a regular or irregular contour of a work part. The control is such that the tool may move at a constant feed rate or a... | 05/13/1986 |
| 4579158 | Work support jig and method of making routered components A pneumatically operated work support jig which selectively retains a workpiece in an aligned relationship with a template having at least one tool guiding slot therein so that the workpiece may be formed into a predetermined shape by a routing or other c... | 04/01/1986 |
| 4541466 | Method and apparatus for machining, preferably milling or grinding of edges and roundings of workpieces in a single machine cycle A bevel and radius routing machine is disclosed with which edges are shaped and corners are rounded in a single machine cycle and which does not require any templates. The radii to be machined can be infinitely variable between 0 and 100 mm by means of si... | 09/17/1985 |
| 4537234 | Routing machines A slide and actuator mechanism for the vertical travel of the cutting tool on an Inverted pin routing machine. A slide that provides a rigid support for the cutting spindle and is durable, unaffected by wood dust, adjustable for exact alignment with top m... | 08/27/1985 |
| 4484608 | Router table A device for support of a portable router above a work table so as to convert a portable router into a pin router assembly. The device includes a mounting plate which is directly attached to the base portion of the router. The mounting plate is formed int... | 11/27/1984 |
| 4353672 | Template device A template device for guiding a cutting tool in cutting engagement with a surface of a work piece to provide ornamental design in the surface of the work piece. The template device comprises a base plate having a base plate opening therein; a carriage sup... | 10/12/1982 |
| 4333635 | Follow-up control means in swinging-arm flame-cutting machines The present invention relates to follow-up control means in swinging-arm flame-cutting machines comprising a scanning element which is arranged at outer component arm of the swinging arm carrying the cutting torch, and in coaxial relation to the latter an... | 06/08/1982 |
| 4322191 | Die finish-cutting machine Apparatus for making the finishing cut on the internal outline of a rough cut female die has two carriages one sliding in one direction upon the other, and the other carriage sliding upon a base at right angles to the first. A male punch comprising a temp... | 03/30/1982 |
| 4300863 | Tool suspension system A system for suspending a tool for horizontal movement with respect to a workpiece, wherein a carriage carrying said tool is slidably carried on a set of parallel rails, which are in turn slidably carried by a second set of parallel rails at right angles ... | 11/17/1981 |
| 4241771 | Bearing assembly for an automatic shaping device An improved bearing assembly for automatic shaping equipment wherein the bearing assembly includes a split cellar having a rotatable upper portion and a stationary lower portion, the upper portion receives a template thereon and moves in response to movem... | 12/30/1980 |
| 4215732 | Pattern-controlled routing machine A routing machine for routing a non-linear groove in a flat extensive workpiece having a pattern in the form of a curved rib temporarily secured to the underside thereof. A reference roller in alignment with the routing tool engages a reference surface on... | 08/05/1980 |
| 4192363 | Automatic profile-copying device An automatic profile-copying device to be used in conjunction with machine tools of the type wherein a profile carrying the workpieces is caused to advance by being drawn between a pair of rollers between which it is clamped. One of the rollers is coaxial... | 03/11/1980 |
| 4151783 | Apparatus for shaping a lug on a stamped workpiece A flat, elongate workpiece such as a knitting-machine needle, stamped from sheet metal with a transverse lug whose narrow faces require precise machining, is clamped in a workpiece holder with its lug centered on an axis about which the workpiece holder a... | 05/01/1979 |
| 4145814 | Cam tracker with slidable cam follower A cam tracker including a master cam with a cam surface thereon engaged by a driven master cam follower contacting the master cam surface and a control cam with a cam surface thereon spaced axially from the master cam and arranged in opposed relation ther... | 03/27/1979 |