Improvements relating to rail-and-trolley systems

A system or kit for forming an assembly which comprises a rail trolley that has a body and one or more wheels mounted to the body to receivable against a rail such that the trolley engages the rail to be moveable therealong, the system or kit comprising:

• at least one portion which said body comprises or is to comprise (“body portion”), the, each, or at least one said, body portion being configured to define at least one slot in said body;
• and
• said wheel(s), the or each wheel being:
• connected or connectable to at least one said body portion;
• or
• connectable to said body,
• the system or kit including at least one component which is connectable to the body through at least one said slot in the body and/or in one or more said body portions or is connected to at least one said body portion through at least one said slot in that/those body portion(s) (“connectable component”), such that the position of a resulting interconnection between the/each component and the body, and thus the location of that component relative to the body, in the assembly is variable along the slot(s) through which that component is connected,
• wherein the, each or at least one said body portion is configured to define at least one said slot arranged so as to align with said rail or an axis thereof when the trolley is engaged therewith (“axial slot”), whereby the location of a said connectable component connected therethrough is variable in an axial direction or a direction which is in alignment with said rail.

A system or kit for forming an assembly which comprises a rail trolley that has a body and one or more wheels mounted to the body to receivable against a rail such that the trolley engages the rail to be moveable therealong, the system or kit comprising:

• at least one portion which said body comprises or is to comprise (“body portion”), the, each, or at least one said, body portion being configured to define at least one slot in said body;
• and
• said wheel(s), the or each wheel being:
• connected or connectable to at least one said body portion;
• or
• connectable to said body,
• the system or kit including at least one component which is connectable to the body through at least one said slot in the body and/or in one or more said body portions or is connected to at least one said body portion through at least one said slot in that/those body portion(s) (“connectable component”), such that the position of a resulting interconnection between the/each component and the body, and thus the location of that component relative to the body, in the assembly is variable along the slot(s) through which that component is connected,
• wherein the, each, or at least one said body portion configured to define at least one slot is so configured that the or each connectable component is so connected or so connectable via at least one fastening through the slot(s) along which the location of that component is variable.

A rail trolley having a body and wheels mounted to the body to be receivable against a rail such that the trolley engages the rail to be moveable therealong, wherein the body comprises portions (“body portions”) which are laterally opposed and to which respective ones of the wheels are mounted to engage proximal parts of opposed laterally outwardly projecting portions of a track section of the rail, thereby restraining the trolley against distal displacement relative to the rail or track section, the assembly being configured with a gap or gaps between said portions and arranged so as to be distal of the projecting portions or track, the trolley or body being configured such that at least one component is connected or connectable thereto:

• within at least one said gap;
• and/or
• via a mounting within at least one said gap;
• and/or
• so as to extend into or within at least one said gap;
• and/or
• so as to be arranged within at least one said gap;
• and/or
• so as to be wholly or partially accommodated in or by at least one said gap.