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 |
| 5954985 | Matching apparatus for connecting high frequency solid state electrical power High frequency reactors for interconnecting a high frequency electrical power source and a load which reactors include a pair of plates having opposite surfaces with a length and width and a thickness between the surfaces which is small relative to the le... | 09/21/1999 |
| 4498064 | Pushbutton tuner with staggered tuning coils A pushbutton tuner wherein tuning coils are disposed in two decks, upper and lower, and the upper or lower tuning coils are disposed in front of the others. A printed circuit board to be connected to said tuning coils by lead wires is divided in two parts... | 02/05/1985 |
| 4361821 | Capacitor coupling arrangement for UHF resonant structure Precise capacitive coupling to a coil is provided by a coil form having a central winding portion for a coil and having transverse flanges at the ends of the winding portion. The flanges are shaped and dimensioned to fit in a structure or resonant cavity,... | 11/30/1982 |
| 4328475 | Tuning core apparatus An improved tuning apparatus for a receiver of the automotive type which includes a tuning core axially slidable within a tubular coil form having an inductance coil wound therearound in which vibratory movement is minimized. The tuning core is formed wit... | 05/04/1982 |
| 4319209 | Fine tuning coil having steel wire forming coil portion A fine tuning coil for use in a local oscillator of a tuner, which is made of a high-tension steel wire or a so-called piano wire. The wire has a diameter which is smaller than that of the conventionally used copper wires, and is loosely wound.... | 03/09/1982 |
| 4311056 | Pre-setting fine tuning device for a turret type television tuner The present television fine tuning is so constructed that an initial rotation establishes the fine tuning state and that a continued rotation of the fine tuning shaft performs the fine tuning. For this purpose the present tuner comprises a fine tuning dri... | 01/19/1982 |
| 4287498 | Tuning arrangement for electrical components An arrangement is provided for mechanically connecting threaded tuning elements of electrical components to rotators driven by automated apparatus. The arrangement includes tuning tools which provide positive rotation to the tuning elements but which perm... | 09/01/1981 |
| 4268805 | Citizens band broadcast band coupling circuit A circuit for coupling a citizens band transceiver and a broadcast band receiver to a standard automobile antenna. The circuit is comprised of an impedance transforming network connected in series with the standard automobile antenna and a parallel-tuned ... | 05/19/1981 |
| 4262547 | Pushbutton tuner A pushbutton tuner suitable for its thinner formation wherein a memory slide member is provided on a base plate of a tuner housing which is shiftable in a direction perpendicular to the sliding direction of a button slide, a gear mechanism is disposed for... | 04/21/1981 |
| 4165499 | Channel-selecting, presettable, rotary type tuning device A channel-selecting, presettable, rotary type tuning device in which there is provided a tuning-position-determining unit having two or more tuning-position-determining elements, whose positions may be adjustable; a slide member operably coupled to a vari... | 08/21/1979 |
| 4155060 | Rotary preset tuner A rotary preset tuner comprising a plurality of adjustable memory slugs, a single tuning member capable of being rotated in any direction, a sliding member connected to variable condenser elements and arranged so as to enable reciprocating movement thereo... | 05/15/1979 |
| 4144511 | Push-button mechanisms and equipment including them A push-button mechanism for tuning a radio receiver includes push-buttons that are actuable to rotate a turrent tuner to different extents for station selection. The side of each push-button contacts one end of an individual lever to pivot it through a pr... | 03/13/1979 |
| 4123781 | Television tuner with fine tuning means A television tuner including a fine tuning mechanism, said mechanism comprising a cam body provided to a sleeve rotatably disposed around the operating shaft, said cam body having a cam surface adapted to convert rotary motion to reciprocating motion, and... | 10/31/1978 |
| 4056796 | Detented UHF television tuner with independent inductive fine tuning A UHF television tuner utilizes a mechanical fine tuning mechanism that alters the operation frequency of the oscillator of the tuner independently of the position of the main tuning shaft. The mechanical fine tuning mechanism utilizes a tuning slug dispo... | 11/01/1977 |
| 3968464 | Multiple tuning system A tuner comprising a plurality of cylindrically assembled bases supported between a pair of support plates secured to a rotatable shaft, receiving circuit blocks for receiving waves in different frequency bands being provided in groups on the inner side o... | 07/06/1976 |
| 3964000 | Pushbutton device for mechanical preselection tuning A pushbutton device for preselection tuning in radio receivers, having an adjusting member journalled to be rotatable in a frame of the receiver for engagement by preselection discs and for controlling tuning coils. A manual tuning knob is connected to th... | 06/15/1976 |
