Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7088505 | Microscope and focusing device for a microscope The present invention discloses a microscope and a focusing device for a microscope. The focusing device has at least one operating element attached to a first axle of the focusing device for effecting movement of a microscope stage along the optical axis of the mic... | 08/08/2006 |
| 6415679 | Manual drive for positioning precision instruments A carriage adapted for carrying a laboratory instrument such as a pipette, electrode, or syringe is driven by a drive shaft in the form of a lead screw. The lead screw is selectively driven by a high speed drive wheel or by a low speed drive wheel. The dr... | 07/09/2002 |
| 5655419 | Handle apparatus A handle apparatus has a rough movement handle and a fine movement handle for rotating an output shaft at leastwise two stages of rough and fine movements by rotationally operating these handles. The rough movement handle is constructed as a crank handle.... | 08/12/1997 |
| 5121655 | Coaxial coarse and fine adjusting device A coaxial fine and coarse adjusting device for moving a movable member movably supported on a device body includes a coarse adjustment handle, a fine adjustment handle provided coaxially with respect to the coarse adjustment handle, a bearing member fixed... | 06/16/1992 |
| 4919001 | Coarse/fine adjustment coaxial handle for feeding microscope stage The coarse/fine adjustment coaxial handle for feeding microscope stage comprises a feed screw shaft, a tubular member rotatably fitted over the feed screw shaft and equipped with a disc plate fixed thereto, a fine adjustment handle rotatably fitted over t... | 04/24/1990 |
| 4719816 | Device for positioning an actuator A linearly reciprocable actuator is reciprocated by a mechanism which includes a rotatable part which is operably connected to the actuator to produce linear movement of the actuator in response to rotation of the rotatable part. A fine drive motor is ope... | 01/19/1988 |
| 4633206 | Expanded dial arrangement for 56 channel UHF tuner The channel selector shaft of a 70 channel mechanically detented UHF tuner is provided with mechanical stops which prevent the shaft from moving above UHF channel No. 69 so that the upper twenty-four UHF channels are unused. Also, a dial driving arrangeme... | 12/30/1986 |
| 4512206 | Actuating device for rotating shafts An actuating mechanism is rotatably and pivotably mounted to a rotatable adjusting mechanism of an instrument. The rotatable mechanism includes a bearing surface and a friction surface. The actuating mechanism includes a pivot and friction means. By pivot... | 04/23/1985 |
| 4270394 | Toning shaft for a rotary switch A rotary type television tuner includes a chassis and a channel changing shaft extending through the chassis and having an operating knob mounted on the front end thereof for rotating the shaft. The channel changing shaft is made of a synthetic resin rein... | 06/02/1981 |
| 4265128 | Turret type frequency selector A frequency selector (tuner) employs a turret to select the position of a slide member that is coupled to a variable reactance. The slide member is moved away from the turret by depressing an operating member and returns to the turret when the operating m... | 05/05/1981 |
| 4235556 | Platen variable A platen variable apparatus is disclosed for rotatably adjusting a platen in step increments and in fine amounts in a typewriter. The apparatus includes an individual hub member rotatably mounted on a platen extension and having teeth thereon intermeshed ... | 11/25/1980 |
| 4173902 | Single-axis coarse and fine adjustment device provided with medium adjustment A single-axis coarse and fine adjustment device for driving a carriage comprises a pinion shaft rotatably supported by stationary support means and having a pinion meshing with a rack provided on the carriage, a connecting shaft rotatably supported with t... | 11/13/1979 |
| 4172390 | Lever for memory fine tuning arrangements for turret type television tuner In a pivotally mounted member of the memory fine tuning arrangement for a turret type television tuner, a pivotally moved lever plate provided integrally with a pivotal shaft having head portion, neck portion and body portion, is pivotally mounted on a fr... | 10/30/1979 |
| 4114459 | Detent UHF tuner with memory type independent fine tuning A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, and a fine tuning mechanism including a rotatable turret having mounted thereon a plurality of cams, each adjustable by a fine t... | 09/19/1978 |
| 4083256 | Single-axis coarse and fine adjustment device provided with medium adjustment A single-axis coarse and fine adjustment device for driving a carriage comprises a pinion shaft rotatably supported by stationary support means and having a pinion meshing with a rack provided on the carriage, a connecting shaft rotatably supported with t... | 04/11/1978 |
| 4044327 | Trimming potentiometers with coarse and fine adjustment means A trimming potentiometer having a resistive member and a rotatable member attached to a wiper in contact with the resistive member for varying the position of the wiper thereon, wherein the rotatable member has a peripherally toothed portion and the non-r... | 08/23/1977 |
| 4043206 | Channel selecting shaft mounting arrangement for UHF tuners In arrangement of a channel selecting device used for a UHF tuner of the continuously variable type, a taper clutch is employed for transmitting the rotation of the detented selector shaft to the output drive gear which is secured to the fine tuning shaft... | 08/23/1977 |
| 4037482 | Accurate UHF television tuning system and method of fabricating same A highly accurate UHF television tuner utilizes an improved housing and an improved mounting system for securing the tuning rotor and stator within the housing. The housing is fabricated from sheet metal that is welded at the corners to provide mechanical... | 07/26/1977 |
| 4027541 | Electronic component having a fine adjustment mechanism An electronic component of this invention having a fine adjustment mechanism is applicable to a variable resistor, variable capacitor or the like which requires fine adjustment. In this electronic component; a drive shaft having an eccentric cam formed th... | 06/07/1977 |
| 4020705 | Coarse-fine focusing device for precision machinery A coarse-fine focusing device for precision machinery capable of accurate coarse and fine adjustments free from any play in which a gear fixed to a pinion shaft having a pinion is connected to a gear fixed to a fine adjustment shaft, to which a fine adjus... | 05/03/1977 |
| 3987680 | UHF tuner device A UHF Tuner device having a first rotating member rotating unitarily with a coarse tuning rotating shaft and adapted to be indexed and held in a position to which it has been thus rotated; a second rotating member rotated unitarily with a fine tuning rota... | 10/26/1976 |
| 3972241 | UHF tuner arrangement A continuously variable UHF tuner arrangement is provided wherein a single channel selector shaft is provided with a detent position for each of the seventy UHF television stations and a highly accurate detent mechanism is employed to return the channel s... | 08/03/1976 |
| 3972240 | Detent UHF tuner with preset memory A detent type tuning mechanism for a UHF tuner having a continuously variable tuning shaft includes a detented selector shaft, a gear train interconnecting the tuning shaft and the selector shaft, and a memory type fine tuning mechanism including a rotata... | 08/03/1976 |
| 3951001 | Vernier drive mechanism This invention relates to a vernier drive mechanism, in which a vernier shaft always being subjected to the elasticity of a coil spring is put into a hollow part of a main shaft in a freely rotatable manner, a housing is put outside the main shaft also in... | 04/20/1976 |
| 3931743 | Compact speed reduction mechanism for a uhf indicator dial A compact speed reduction mechanism for driving a tuning indicator dial of a UHF television tuner or the like includes a harmonic drive unit having a rigid fixed spline and a movable flexible spline member. The indicator dial is mechanically coupled to th... | 01/13/1976 |
