Abstract: A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least ne robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.

Abstract: A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least ne robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.

Abstract: A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least one robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.

Abstract: A circular saw blade includes a plurality of cutting teeth repeatedly alternating between a first set of cutting teeth and a second set of cutting teeth around the periphery of the saw blade. Each first set of cutting teeth includes at least two efficient cutting teeth, each second set of cutting teeth comprising at least one robust cutting tooth. Each first set of teeth and each second set of teeth are configured such that, if one tooth in the first set of teeth breaks, the chip load in the immediately following second set of teeth increases by less than approximately 45%.

Abstract: A mower deck cleaning device for a rotary mower for removing clippings from the inside of the mower blade housing. A tubular conduit is mounted on the mower so as to extend through the deck of the mower. A garden hose may be attached to the conduit to flow water through the conduit. A rotor mounted on the conduit receives the water from the hose and projects a rotating pattern of pressurized fluid for cleaning the inside of the housing.

Abstract: A mower deck cleaning device for a rotary mower for removing clippings from the inside of the mower blade housing. A tubular conduit is mounted on the mower so as to extend through the deck of the mower. A garden hose may be attached to the conduit to flow water through the conduit. A rotor mounted on the conduit receives the water from the hose and projects a rotating pattern of pressurized fluid for cleaning the inside of the housing.

Abstract: A site reference source acts as a programmable frequency source. The site reference source includes a symmetrical radiating unit. The symmetrical radiating unit includes a cylindrical shaped structure, a signal generator, a power source and an antenna. The signal generator is housed within the cylindrical shaped structure. The power source is also housed within the cylindrical shaped structure. The power source provides power to the signal generator. The antenna is external to the cylindrical shaped structure. The antenna is electrically connected to the signal generator housed within the cylindrical shaped structure. In order to radiate signals, the signal generator generates signals and transmits the signals through the cylindrical shaped structure to the antenna.

Abstract: Equipment under test is adjusted during set-up for electromagnetic compatibility testing. The equipment under test is placed on a base, such as a table, other structure or the ground. Positioners are connected to cables and/or subparts of the equipment under test. For example, the positioners are non-metallic pneumatic cylinders. The positioners are anchored to the base, to the device under test, or to some other structure. For various positions of an antenna relative to the equipment under test, positions of the positioners are found for which there is a maximum signal response. This is done by measuring signal response for current positions of the positioners. The current positions of the positioners are then varied using a remote control unit which controls positions of the positioners. This is repeated for as many different positions as desired. The positions which resulted in the maximum signal response is utilized for the electromagnetic compatibility testing.

Abstract: A heater for a thermionic cathode for producing an electron beam includes a central wide and a hollow cylindrical conductor with the wire disposed coaxially thereof. The wire and the cylindrical conductor are electrically connected at one end of the heater and at the other end include means for connecting to a power source. Equal electrical currents thus flow in opposite directions in the wire and the cylindrical conductor so that the magnetic fields produced thereby tending to deflect the electron beam cancel each other.