10-02-1965 дата публикации
Номер: GB982619A
982,619. Locking stays. F. T. PRODUCTS Ltd. Jan. 27, 1964 [Jan. 31, 1963], No. 4091/63. Heading E2F A stay comprises two members held in sliding contact so as to be pivotally or rectilinearly movable relative to each other in a defined direction and arranged to be locked in one, two or more positions relative to each other. In one embodiment, Fig. 1, the stay comprises two arms 11, 12 spring-urged together on a tubular pivot 13, the arm 11 including a slot 15 having a notch 16 having teeth 19, 20, and the arm 12 including a slot 21 having a notch 22, a flanged locking pin 26 passing through the slots 15, 21 and being urged radially inwards towards the pivot 13 by springs 27, 28. When the arm 12 has been rotated clockwise relative to the arm 11 through about 90 degrees, the notches 16, 22 are then in register so that the pin engages the notches and locks the arm 12 against anticlockwise movement, since side wall 17 of the notch 16 is undercut and side wall 24 of the notch 22 is substantially radial. On further clockwise rotation of the arm 12, oblique walls 23, 18 of the notches 22, 16 cam the pin 26 radially out of the notches, and the pin is moved along to the end of the slot 15 where it is in an overcentre position. As the arm 12 is rotated anticlockwise the pin 26 is prevented from engaging the notches 16, 22 by the corner formed between the radially inner edge of the slot 21, and the notch 22. Instead of providing the teeth 19, 20, the radius of the radially inner edge of the slot 15 may be made greater than the radius of the radially inner edge of the slot 21. The pin may be urged outwardly and the notches formed in the radially outer edge of the slot 15. Stays as described may be used in pairs for perambulator hoods, the hood being fully raised when the pin 26 is in the overcentre position, and half raised when the pin is in the locked position. In another embodiment, Fig. 9 (not shown), two locking positions are obtained by providing two notches in the slot ...
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