A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7102450 | Method and apparatus for providing clock signals at different locations with minimal clock skew A tapped phase shift ring oscillator may be used to provide multiple clock signals having variable phase delays. Phase delays may be selected to compensate for clock skews at different locations on high speed chips, or to provide clock signals having specific, desir... | 09/05/2006 |
| 7103274 | Cross-connect apparatus An apparatus having n-number of working cross-connects for cross-connecting an n-bit input signals arriving from a plurality of input paths on a per-bit basis; n-number of first logic circuits for calculating the exclusive-ORs of each said n-bit and applying outputs... | 09/05/2006 |
| 6445710 | Method and apparatus for transparently bridging traffic across wide area networks A technique for logically connecting local communications networks (CNs) that may be separated by wide area networks containing routers and other network components. A logical link is formed between two devices called tunnelers, such that, once a tunnel h... | 09/03/2002 |
| 5737173 | Railroad track circuit vital relay control A railroad vital relay control circuit has a first input for receiving a reference alternating current signal of a selected frequency and a second input for receiving a track alternating current signal having the selected frequency of the reference signal... | 04/07/1998 |
| 5184210 | Structure for controlling impedance and cross-talk in a printed circuit substrate An arrangement for interconnecting high density signals of integrated circuits includes an electronic circuit on a multilayered substrate which includes at least three layers. These layers comprise a signal layer for carrying signals in the electronic cir... | 02/02/1993 |
| 4789795 | Logic voting-circuit A majority logic voting system employs at least three magnetic AND gates, each having first and second inputs and an output. The first input to each gate is connected as the second input to another gate and the outputs are connected in common so that the ... | 12/06/1988 |