Abstract: A package sizer comprising a first pair of walls defining a first pair of generally opposed, substantially parallel, planar surfaces. A second pair of walls connected to the first pair defines a second pair of generally opposed, substantially parallel, planar surfaces, the second pair of surfaces being contiguous and perpendicular to the first pair, whereby the four surfaces define a rectangular enclosure. At least one of the walls of each such pair is slidable toward and away from the other wall of that pair to vary the dimensions of the rectangular enclosure.

Abstract: A process for cracking hydrocarbons is disclosed in which catalyst particles are regenerated in two stages, the first employing an entrained bed of upwardly moving catalyst in cocurrent flow with regeneration gas, and the second employing a fluidized bed of catalyst in net downward movement countercurrent to regeneration gases.

Abstract: The preparation of racemic and optically pure tryptophans is described. The D-enantiomers of the 6-substituted compounds possess a potent sweetening capability. Novel intermediates are also disclosed.

Abstract: A process for preparing 6-chloro-.alpha.-methylcarbazole-2-acetic acid and esters thereof by the steps of:(a) reacting 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one with a trialkyl-.alpha.-methylphosphonoacetate to yield corresponding 3,4-dihydro-.alpha.-methylcarbazole-2-acetic acid ester; and(b) aromatizing the reaction product of step (a), prior to or after saponification, to yield, respectively, 6-chloro-.alpha.-methylcarbazole-2-acetic acid or ester, is described. Additionally, there are described 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one useful as an intermediate, and dihydrocarbazoles useful as intermediates and/or as anti-inflammatory and antirheumatic agents.

Abstract: A process for preparing 6-chloro-.alpha.-methylcarbazole-2-acetic acid and esters thereof by the steps of:(a) reacting 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one with a trialkyl-.alpha.-methylphosphonoacetate to yield the corresponding 3,4-dihydro-.alpha.-methylcarbazole-2-acetic acid ester; and(b) aromatizing the reaction product of step (a), prior to or after saponification, to yield, respectively, 6-chloro-.alpha.-methylcarbazole-2-acetic acid or ester, is described. Additionally, there are described 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one useful as an intermediate, and dihydrocarbazoles useful as intermediates and/or as anti-inflammatory and antirheumatic agents.

Abstract: A process for the preparation of 6-chloro-.alpha.-methylcarbazole-2-acetic acid from 6-chloro-.alpha.-hydroxy-.alpha.-methylcarbazole-2-acetic acid and/or 6-chloro-.alpha.-methylene-2-carboxylic acid, is described. The preparation of intermediates, such as, 6-chloro-.alpha.-hydroxy-.alpha.-methylcarbazole-2-acetic acid and lower alkyl carbazole-2-oxalate, inter alia, is also described.

Abstract: A process for the preparation of 6-chloro-.alpha.-methylcarbazole-2-acetic acid from 6-chloro-.alpha.-hydroxy-.alpha.-methylcarbazole-2-acetic acid and/or 6-chloro-.alpha.-methylene-2-carboxylic acid, is described. The preparation of intermediates, such as, 6-chloro-.alpha.-hydroxy-.alpha.-methylcarbazole-2-acetic acid and lower alkyl carbazole-2-oxalate, inter alia, is also described.

Abstract: A device to be towed through the water by a boat and which in turn is adapted to tow a person through the water, the body of the device having a constant buoyancy and being equipped with steering means whereby it can be maintained on the surface of the water while being towed, can be submerged while towing a person with scuba gear, and which can be maneuvered under water to partially or completely roll the device and its user.

Abstract: A process for preparing 6-chloro-.alpha.-methylcarbazole-2-acetic acid and esters thereof by the steps of:(a) reacting 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one with a trialkyl-.alpha.-methylphosphonoacetate to yield the corresponding 3,4-dihydro-.alpha.-methylcarbazole-2-acetic acid ester; and(b) aromatizing the reaction product of step (a), prior to or after saponification, to yield, respectively, 6-chloro-.alpha.-methylcarbazole-2-acetic acid or ester, is described. Additionally, there are described 6-chloro-1,2,3,4-tetrahydrocarbazole-2-one useful as an intermediate, and dihydrocarbazoles useful as intermediates and/or as anti-inflammatory and antirheumatic agents.

Abstract: Lower alkyl esters of 2-formamido-3(4,5,6 or 7-methyl substituted-3-indolyl)-2-carbalkoxy propionic acid which are useful as intermediates for tryptophane sweetners.

Abstract: Conveyor method and apparatus wherein there is provided a package carrying tray, a pair of endless control chains, a pair of endless load chains, and a motor and sprocket wheel-drive arrangement for rotating the chains in synchronism. The tray is so connected to points on the chains that the tray is maintained in substantially horizontal and vertical positions during portions of tray movement from and to package loading and unloading areas while compensating for changes in spacing between the points during movement from one position to the other. The connection involves providing a pair of pins each on an opposite side of one end of the tray, with each of the load chains secured to a pin at a point for pivotal movement. A pair of control arms are each secured to a pin at its end, and have a slide thereon which is fastened to a point on one of the control chains for pivotal movement. Fork assemblies, cooperable with the tray, provide for the loading and unloading of packages at designated stations.