Abstract: The present invention relates to a milling tooth and method of using the same, having a shank, a circular flange member disposed on an end of the shank, the flange member opposite a side connected to the shank, the flange member having a predetermined dimension, a surface of the flange member being concave. The milling teeth are used in particular on rotary mulchers and have a direct impact on reducing the cost of brush cutting operations. Conventional designs of milling teeth often lead to the mulching head becoming clogged by debris resulting in an inconsistency in the quality of the end product at cost.

Abstract: A method for reducing particulate iron oxide and/or other iron units to molten iron utilizing gaseous hydrogen as reductant in a reducing furnace, in which the ore freely falls during the melting and reduction process. Reacted top gas is purified and recirculated through the reduction furnace, establishing a counter-flow relationship to the particulate iron oxide, thereby heating and reducing the oxide. The heat for reduction is generated by combusting a fraction of the hydrogen reductant with oxygen. Heat may also be supplied via the use of electric arc heating. Oxygen may be partially or wholly replaced with water in order to maintain reaction oxidizer ratios while reducing heat supplied to the reaction.

Abstract: In a method for the production of steel in an environmentally benign fashion, energy sources other than conventional fossil fuels are used to produce reductant fuels. These reductant fuels are used for the reduction of iron ore and its conversion to steel. Furthermore, these reductant fuels may be stored in order to smooth fluctuations in the primary energy supply. Electrical energy may be stored to smooth out short term fluctuations in the primary energy source. Energy for the reduction and conversion process may be supplied in part directly from the primary energy source, avoiding inefficiencies in the production and storage of the reductant fuel. Possible primary energy sources include solar power, wind power, off-peak power supplied as part of load leveling plants, as well as conventional constant power output from an ordinary power plant.

Abstract: In a method for operating a blast furnace, the primary supply of reductant and heat is an hydrogen reducing blast. Oxygen or water vapor is injected into the blast furnace to control temperature. Coke is used to provide appropriate gas channels and carburization. Coke use rate can be reduced to less than 10% of that of conventional blast furnace operation. A conventional blast furnace may be converted to this method with minor modification.

Abstract: A cassette tape recorder with mechanical soft touch operating mechanism which includes a base body with a push button holder or mechanism at one side thereof with a group of operating button levers which include a pause button lever, a play button lever and a fast/forward button lever, a rewind button lever, a record button lever and a stop button lever and includes four notched cam gears mounted in pairs with one of the cam gears coupled to the pause button lever another cam gear coupled to the fast/forward button lever and the first pair of cam gears mounted adjacent each other on the same shaft and adapted to separately engage a gear which is coaxial with a fly wheel that is rotated by a motor.

Abstract: A cassette tape recorder in which a fully automatic shut-off of the tape drive occurs whenever stopping of a winding reel shaft or a tape feed reel shaft is sensed and which is utilized to transmit through associated mechanism to shut-off the operation of the tape recorder. A felt disk which is mounted in a suitable lubricant and placed between a spring loaded means and a reel shaft operates in combination with sensing mechanism to effect shut-off of the tape recorder.

Abstract: An electrode lead tab for oil-impregnated capacitors having dielectric sheets and electrode foils laminated to each other, in which a plurality of cutting lines or rifts are provided to a tab main body, so that the tab main body can ensure a close electrical contact at a plurality of regions thereof to the electrode foils.

Abstract: A magnetic tape machine which has recording, rewind, playback, fast forward and stop keys and which is provided with a locking plate such that when the machine is in the playback mode and either the fast forward or rewind keys are depressed, the machine will go into the fast forward or rewind modes but will return to the playback mode when the fast forward or rewind keys are released.

Abstract: A magnetic tape machine wherein the switch-over operations of the machine are driven by the tape driving mechanism so as to allow a single drive motor to drive the tape as well as to provide power for switch-over operations. A starting plate is pivotally attached to the tape machine and a moving plate is mounted adjacent the starting plate with a first gear rotatably mounted on the tape machine and having a pair of cutout portions displaced 180.degree. from each other and a second gear and capstan driven by the main motor with the second gear engageable with the first gear to drive it 180.degree. each time the first and second gears engage such that the various plates, gears and idlers allow the single drive motor to drive the tape as well as to provide power for switch over operations.

Abstract: An automatic switch-off system for use in a cassette tape recorder. A tape feed shaft is axially supported at one end of an arm lever which has its rotating center at an axis of a relay gear for transmitting the driving power to the tape feed shaft. The tape feed shaft and an encircling hub are moved against the cassette case at the end of tape feeding or rewinding operation by the drawing force of the tape. This movement of the shaft urges the arm lever to release the tape running state by causing a lever to rotate and engage a pin on a pulley which supplies the driving power. This pin causes the lever to move laterally thus permitting a tape running set lever to disengage.

Abstract: A housing for a small compact tape reproducer and recorder made of synthetic resin material which utilizes a portion of the housing as a chassis for mounting the operating mechanism of the machine and wherein at least one side of the chassis is formed as a folded portion of one of the housing walls which connects with other sections of the housing and has at least one side surrounded by a vertical wall which also serves as a wall for other sections of the chassis.

Abstract: There is disclosed a device for loading down which includes a source of air-fluffed down and a blower for delivering down entrained in air through at least one down-loading station. The device includes connections to draw down from its source to a calibrated filter and to reverse the flow through the filter when a predetermined amount of down has been delivered, whereby the down is removed from the filter and delivered, entrained in air, to a loading station. There is also disclosed a two-vessel device for providing a small amount of air-fluffed down from a large, compact capacity.