Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7156590 | Quill lock assembly A quill lock assembly for locking a quill of a device such as a drill press is described. The quill lock assembly includes a cam assembly and a handle connected to the cam assembly. The cam assembly is connected to the device, such as with a mounting bracket or the ... | 01/02/2007 |
| 7109613 | Power hand tool A power hand tool includes a body and an electric motor in the body and having a shaft for driving a connector for connecting and driving a cleaning/polishing implement. An enclosure encloses the motor for protection against intrusion of a liquid, and includes a the... | 09/19/2006 |
| 6915726 | Wood-turning lathe A wood-turning lathe includes a spindle and a drive shaft journalled to a headstock housing. A motor is mounted in the headstock housing, and includes a rotor. A torque converter includes a first wheel that co-axially surrounds the spindle and that is securely coupl... | 07/12/2005 |
| 6779952 | Stepless speed change bench drill This invention relates to stepless speed change bench drill, comprising a pedestal, a vertical post mounted on the pedestal, a worktable and a cabinet mounted on the vertical post, a driving shaft and a main shaft mounted on the upper portion of the cabinet, a motor... | 08/24/2004 |
| 6447225 | Spindle assembly drive A spindle assembly, with improved belt drive, is suitable for a multi-axis machining cell providing tool movements along predetermined axes of motion, such as the X-, Y- and Z-axes. Plural machining spindles, each provided with a driven pulley, are mounte... | 09/10/2002 |
| 6398678 | Speed adjusting device for a drill A speed adjusting device for a drill includes two pulley assemblies between which a belt is connected. Each pulley assembly has a fixed disk and a movable disk so that an effective diameter that the belt engages the pulley assembly can be changed by adjus... | 06/04/2002 |
| 6305887 | Structure for mounting motor of planing machine A structure for mounting a motor of a planing machine includes a hollow base, an axle casing fitted in said base and provided with a spindle for connecting with a planing cutter, a first pulley arranged under said spindle so that a belt connects said firs... | 10/23/2001 |
| 6203458 | Speed adjusting device for a drill press A speed adjusting device for a drill press includes a first variable pulley mounted to the motor shaft and a second variable pulley mounted to the output shaft with a belt connected between the two variable pulleys. A pressing member is mounted to the sec... | 03/20/2001 |
| 5908270 | Multi-spindle machining apparatus and multi-spindle machining method The present invention relates to the multi-splindle machining apparatus which carries out machining of the discontinuous surfaces of a plurality of workpieces simultaneously, and in order to restrain the amplification of chattering, oscillation or the lik... | 06/01/1999 |
| 5857814 | Apparatus for controlling tapping-drilling machine An apparatus for controlling a tapping-drilling machine is disclosed in which holes can be formed by means of drilling tools, and threads can be formed by means of tapping tools. A worm is elongately formed on a spindle, and a worm wheel which is meshed w... | 01/12/1999 |
| 5848863 | Working machine having different working angle A working machine includes a base having a working table for supporting a work piece and having a tool disposed on top for moving downward to machine the work piece. A block is secured to the base and has another tool for being selectively rotated to mach... | 12/15/1998 |
| 5634748 | Drill press having a movable head and a tilt table A drill press assembly having a base mountable to a work bench, a vertical column attached to the base and a drill head assembly having an electric motor and a quill. The drill head assembly is movably attached to the column. A rack is rotatably attached ... | 06/03/1997 |
| 5567094 | Speed change control mechanism of a vertical milling machine A speed change control mechanism including a motor for power output, a main shaft, a belt transmission mechanism driven by the motor to turn the main shaft, a gear box disposed at one side of the main shaft, the gear box comprising a gear shaft, a small g... | 10/22/1996 |
| 5161925 | Apparatus for bringing a tool to a workpiece and applying axial force thereto, in particular as a tapping machine A tool head for moving a tool to a workpiece and applying an axial force thereto includes a grooved tubular spindle mounted on a fixed shaft for relative axial and rotational movement. The spindle is rotated by a timing belt transmitting power from a driv... | 11/10/1992 |
| 5061124 | Drilling machine A top housing supported by a vertical post in a drilling machine is provided with a belt transmission mechanism incorporating a speed adjusting mechanism which can be operated easily and manually. The adjusting mechanism includes a knob connected to an ad... | 10/29/1991 |
| 4722123 | Driving system for automatic lathes An electric motor can drive a workpiece and a tool simultaneously at speeds in a ratio adjustable at will. The workpiece is driven via two pulleys and a belt, while the tool is driven via further pulleys and a belt from a hydraulic circuit comprising a pu... | 02/02/1988 |
| 4679970 | High speed toolholder for a machining center A high speed toolholder for driving a small high speed cutting tool from the large slow speed spindle of a machining center comprises a housing having a retention pin extending from side end thereof. An input shaft, dimensioned to be received in the machi... | 07/14/1987 |
| 4357124 | Power feed rotary tool A power feed rotary tool, such as a drill or a tapper, has an electric motor for rotating the working head and a pneumatic system for advancing the working head. A control rod extends from one end of the tool housing, and is displaced together with the wo... | 11/02/1982 |
| 4209273 | Machine tool speed control system This invention relates to a retrofit system for automatically selecting and continuously controlling the rotational speed of a typical machine tool. A plurality of sensors are provided adjacent to the storage receptacles for each of the tools or tool hold... | 06/24/1980 |
| 4199285 | Machining unit having adjustable cutter spindle A machining unit with a working spindle supported in a spindle housing and a saddle on which the spindle housing is removably secured and which is guided on a saddle carrier for sliding movement axially of the working spindle to cause the working spindle ... | 04/22/1980 |
