Abstract: A telescopic paper holder has a first and second cylindrical member each having an inside and outside end. The second cylindrical member is telescopically and slidably nested in the first cylindrical member. A spring can urge the first and second cylindrical members to extend axially. A tether is strung at the first and second cylindrical members to emerge from their outside ends. Thus the first and second cylindrical members can be compressed together by pulling in on the tether.

Abstract: Apparatus for sensing distance between a pair of indicia on a surface moving relative to the apparatus has an interval detector, a sensor and a scale device. The interval detector can respond to movement of the surface. The detector can produce an interval signal signifying the time elapsing during the passage of an interval on the surface of a predetermined length. The sensor is positioned alongside the surface for sensing the arrival times of the pair of indicia at the sensor. The scale device responds to the interval detector and sensor device for producing a distance signal signifying the ratio of the time difference in arrival of the pair to the interval signal.

Abstract: A rebound apparatus for practicing striking a ball with a racket. The apparatus has an elongated rectangular frame which is mounted on a base for pivotal adjustment about a horizontal axis. Mounted on the frame is a flexible material which is relatively loose along the width of the frame and relatively taut along the length of the frame. The upper end of the frame is curved out of the plane of the main portion of the frame, and this upper end supports a ball rebound surface. The flexible material may be secured at its upper end to the rebound surface. The length of the frame is adjustable. In use, a ball when hit by a racket will strike the flexible material, rebound upwardly against the ball rebound surface, and then rebound again in a direction back toward the player who hit the ball.

Abstract: A method for the disposal of waste gas, which method comprises (a) heating the incoming waste gas containing hydrocarbons, carbon monoxide, and other inflammable organic compounds with the gas obtained by removing heat from the outlet gas of the catalytic-oxidation reactor, (b) further heating the resultant hot waste gas with part of the outlet gas of the catalytic-oxidation reactor, (c) subjecting the heated waste gas to complete oxidation in the catalytic-oxidation reactor thereby rendering the waste gas no longer noxious, (d) diverting part of the outlet gas of the catalytic-oxidation reactor to be used for heating the aforementioned heated waste gas, (e) causing at least part of the outlet gas of the reactor which has been used for heating the waste gas to mingle with the remainder of the outlet gas of the reactor, (f) causing the remainder of the outlet gas of the reactor which has been used for heating the waste gas to mingle with the aforementioned heated waste gas, and (g) subjecting to heat recovery

Abstract: An apparatus for mixing a hydrocarbon-containing gas flow with a molecular oxygen-containing gas flow, wherein at least one aqueous medium sealing zone allowing the hydrocarbon-containing gas flow to pass therethrough is provided by sealing a side of said introduced gas flow with an aqueous medium, providing at least one shielding zone for flame propagration, said gas flow is allowed to pass therethrough on a discharge side of said gas flow, and providing means for introducing the molecular oxygen-containing gas flow into a gas mixing zone defined between both of the above zones there to be thoroughly mixed with the hydrocarbon-containing gas flow.

Abstract: A summing arrangement controls the shogging movement of a guide bar of a warp knitting machine. The arrangement has a plurality of ordered elements each having at least one curved face. The ordered elements are mounted on the machine to allow a variation in the spacing between each. Also included is a plurality of adjustable roller devices, one between each adjacent pair of elements. Each of these roller devices can roll upon and push at least one of the elements at its curved face.