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Publication of GB667561ApublicationCriticalpatent/GB667561A/en
667,561. Hatch covers. MACGREGOR, R., and MACGREGOR, J. Oct. 25, 1950, No. 25996/50. Class 113 (i). In a. wheel 7 for a steel hatch cover 2 of the eccentric bush type, the eccentric bush 6 is provided with a sleeve 10 projecting from its exposed flat face 11 and fitting completely around the spindle 4, the sleeve and spindle being bored diametrically from one side of the sleeve to the other to receive a through locking pin 13 which lies parallel with the general plane of the cover. The bush is formed with a cross passage 14 for the reception of a lever to facilitate turning the bush. Specification 611,848 is referred to.