Abstract: A thimble assembly for a cyclone separator comprising a plurality of carrier brackets separately mountable on a shelf of the separator along the perimeter of a circular exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of a row immediately above, each bracket exclusively serving a chord of an arc concentric with the circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: A thimble assembly for a cyclone separator comprising a plurality of mounting brackets separately mountable on a shelf of the separator along the perimeter of an exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of a row immediately above, each bracket exclusively serving a chord of an arc concentric with the preferably circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: A thimble assembly for a cyclone separator comprising a plurality of carrier brackets separately mountable on a shelf of the separator along the perimeter of a circular exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of a row immediately above, each bracket exclusively serving a chord of an arc concentric with the circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: A thimble assembly for a cyclone separator comprising a plurality of mounting brackets separately mountable on a shelf of the separator along the perimeter of an exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of a row immediately above, each bracket exclusively serving a chord of an arc concentric with the preferably circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: A thimble assembly for a cyclone separator comprising a plurality of carrier brackets separately mountable on a shelf of the separator along the perimeter of a circular exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of row immediately above, each bracket exclusively serving a chord of an arc concentric with the circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: A thimble assembly for a cyclone separator comprising a plurality of carrier brackets separately mountable on a shelf of the separator along the perimeter of a circular exhaust opening, a plurality of segments vertically successively suspended from the brackets, the segments of an upper row being joined to the brackets, the segments of each successive lower row being joined to the segments of a row immediately above, each bracket exclusively serving a chord of an arc concentric with the circular opening that is substantially the same in length as the chord of an arc that a segment spans, a center-to-center chordal spacing of adjacent brackets being the same as a center-to-center distance of an adjacent pair of segments.

Abstract: The disclosure relates to an electronic circuit including at least one first and one second differential pair each including a plurality of transistors. All the transistors of said first and second differential pair are included in a single well.

Abstract: The disclosure relates to an electronic circuit including at least one first and one second differential pair each including a plurality of transistors. All the transistors of said first and second differential pair are included in a single well.

Abstract: The disclosure relates to an electronic circuit including at least one first differential pair including first and second transistors. The first and second transistors share one and the same single source or one and the same single drain.

Abstract: A rotary cutter bar for a tree felling apparatus. The bar comprises a cylindrical rod having a plurality of raised cutting teeth on its surface. Each tooth is in the form of a short curved bar. The teeth are located on a plurality of equally spaced-apart, spiral paths extending about the cylindrical surface of the rod from one end to the other. The spiral paths extend at an angle of between 30.degree. and 60.degree. to the longitudinal axis of the rod.

Abstract: A tree felling head has a frame with two laterally spaced-apart support means at the bottom of the frame. A cutting unit is pivotally mounted at one end on one of the support means while the other end of the cutting unit is supported on the other support means. The cutting unit carries a rotatable cutting bar. Means pivot the cutting unit, while its other end is guided on the other support means, and while its cutting bar is rotated, to move the cutting bar against a tree and to cut through it.The cutting unit also has an accumulating plate located immediately behind the cutting bar for accumulating cut trees thereon.