GB1010940A - Hatches, especially ships' hatches, having associated hatch covers - Google Patents

Abstract

1,010,940. Operating hatch covers; stud and socket fastenings; catch fastenings. BERGENS MEK ANISKE VERKSTEDER A/S. May 29, 1964 [June 15, 1963], No. 22269/64. Headings E2A, E2B and E2M. [Also in Division B7] In a sectional hatch cover (see Division B7) the sections are hinged together at 15 by a hydraulic rotary motor (not shown) such that on initially operating the motor, section 12 will pivot at its edge about stop device 16 while the left-hand edge of section 13 is provided with roller 17 which rolls on coaming 10. This movement continues until roller 17 slides into recess 18 (see solid lines in Fig. 2). The motor is then adjusted so that the sections are pivoted into the closed hatch position, i.e. the right-hand end of section 12 is released from device 16 and rolls to stop device 20 (see dotted lines in Fig. 2) where it is locked in position. The motor is then adjusted to fold the sections together again. This draws roller 17 from recess 18 and pivoting is continued until the sections are folded together (see chain dotted lines in Fig. 2). The right-hand end edge of section 12 carries a bearing pin 19 and a roller 21 (see Fig. 5). Normally roller 21 is located in a recess 22 in the coaming so as to rest on a rail piece 23 which is supported by a member 24 of jack 25. When the end edge is to leave device 16, rail piece 23 is raised flush with portion 26 of the guideway of the coaming. At the side of the recess 22 is located a bracket 27. Pin 19 is received in a slot in said bracket such that on raising of rail piece 23, pin 19 is free to move out of the slot. In order to ensure, that this only occurs when the sections are positioned as shown in full lines in Fig. 2, a half of the pin is cut away (Figs. 3 and 4, not shown). Stop device 20 comprises a vertically mounted bracket plate 31 carrying an angle arm 34 and a locking arm 38. When pin 19 is moved into slot 32, angle arm 34 will be pivoted in a clockwise direction such that branch 35 will lift arm 38 the locking face of which will bear against branch 35 and hold it fast (Fig. 7, not shown). At this instance opening arm 43 on section 12 is disposed on the left of pin 40. However, the bearing pin 44 of the opening arm 43 will be pivoted further upwards and further towards the right. Just before the sections reach their final vertical position, arm 43 passes over an extension of pin 40 and hangs down vertically to the right of pin 40. When the hatch sections are to be lowered again, the arm 43 is pivoted in the anticlockwise direction until it bears against boss 45. Continued movement of section 12 will cause the arm to bear against an extension of pin 40 so that locking arm 38 is pivoted in an anticlockwise direction. This allows angle arm 34 to pivot under gravity in an anti-clockwise direction and thus allow pin 19 to move to the left.