A heald rod retention device comprising an elongate body (22) having a first body portion (22a) adapted to guide reciprocal movement of the terminal end portion of a heald rod (15) and a second body portion (22b) provided.with a first latch (30) formation for engagement with a second co-operating latch formation (31) on the heald rod (15), the heald rod (15) being guided by the first body portion (22a) so that during reciprocation the second latch formation (31) moves passed the first latch formation (30) without engagement, at least one solenoid (23) activated magnetic pole piece mounted on the second body portion (22b) and extending along the path of reciprocation of the heald rod (15) and which on activation of the solenoid (23) causes deflection of the terminal end portion of the heald rod (15) during its reciprocal movement to bring the first (30) and second latch formations (31) into engagement, and stop means (27) for limiting the amount of deflection of the heald rod (15) so as to prevent contact between the heald rod (15) and the pole piece (24).
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