Rathbone

Mounting configuration and operating envelope Industrial standards, such as the rathbone severity chart, assume that the machine is rigidly mounted on a suitable concrete foundation. Machines mounted on deck-plate or on flexible foundations have higher normal vibration profiles and cannot be evaluated using these standards. 

The Rathbone chart in Figure 44.30 provides levels of vibration severity that range from extremely smooth, which is the best possible operating condition, to very rough or absolute-fault limit, which is the maximum level where a machine can operate. 

Data included in the Rathbone chart are valid for machines with running speeds between 1200 and 3600 rpm. The chart cannot be used for low-speed or turbo-machinery. 

The American Petroleum Institute (API) has established standards for vibration levels. Unlike the Rathbone chart, which presents relative vibration data, the API standards are actual shaft displacement as measured with a displacement probe. Based on the API data, acceptable vibration can be defined by ... 

Figure 44.30 Rathbone chart - relative vibration severity...

Avery TD, Haselgrove TD, Rathbone TJ, Taylor DK, Tiekink ERT (1998) Chem Commun 333... 

Williams RE, DA Rathbone, NS Scrutton, NC Bruce (2004) Biotransformation of explosives by the Old Yellow Enzyme family of flavoproteins. Appl Environ Microbiol 70 3566-3574. 

Rathbone DA, Bruce NC (2002) Microbial transformation of alkaloids. Curr Opin Microbiol 5(3) 274-281... 

Rathbone DA, Lister DL, Bruce NC (2003) Biotransformation of alkaloids. In Cordell GA (ed) The alkaloids, vol 58. Elsevier, Amsterdam... 

Correa, P. and Ruiz, B. (1992). Helicobacter pylori and gastric cancer. In Helicobacter pylori and Gastroduodenal disease (eds. B.J. Rathbone and R.V. Heatley) pp. 158-164. Black-well Scientific Publications, Oxford. 

Sobala, G.M., Crabtree, J., Dixon, M.F., Schorah, C.J., Taylor, J.D., Rathbone, B.J., Heatley, R.V. and Axon, A.T.R. (1991a). Acute Helicobacter pylori infection clinical features, local and systemic immune response, gastric mucosal histology and gastric juice ascorbic acid concentrations. Gut 32, 1415-1418. 

Oral Mucosal Drug Delivery, edited by Michael J. Rathbone... 

P Byron, M Rathbone. Prediction of interfacial transfer kinetics. I. Relative importance of diffusional resistance in aqueous and organic boundary layers in two-phase transfer cell. Int J Pharm 21 107, 1984. 

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