Adjusting device for a double-hung sash assembly, improved assembly so obtained and method of use

In a double-hung sash assembly comprising:

• two adjacent first and second pairs of sashes sliding in a window frame, each pair comprising an upper sash and a lower sash;
• at least one set of four pulleys operatively mounted in a housing mounted in said window frame, each pulley of a same set being substantially aligned with one of said sashes;
• and for each set of four pulleys:
• a first cable having two ends, one of said ends being fixed to said upper sash of said first pair and the other end being fixed to said lower sash of said second pair, said first cable being supported by two of said pulleys aligned with said sashes having an end of said first cable fixed thereto;
• a second cable having two ends, one of said ends being fixed to said lower sash of said first pair and the other end being fixed to said upper sash of said second pair, said second cable being supported by two of said pulleys aligned with said sashes having an end of said second cable fixed thereto;
• the improvement wherein for each set of four pulleys, adjusting means are provided for adjusting the relative distance between each pulley and its corresponding sash, said adjusting means comprising:
• four rails provided in the housing;
• four supports, each support being slidably mounted in a corresponding rail;
• each pulley of those supporting the first cable being respectively operatively mounted to a corresponding support, and each pulley of those supporting the second cable being respectively operatively mounted to a corresponding support;
• and
• means for individually moving each of said support along its corresponding rail to thus adjust the relative distance between a pulley and its corresponding sash, said means comprising, for each support:
• an element integral with a lower portion of the housing,
• a screw having an upper end abutting against or operatively attached to said support, an intermediary portion meshed to the element integral with the housing and lower end projecting from said housing and intended to be engaged by driving means.

In a double-hung sash assembly comprising:

• two adjacent first and second pairs of sashes sliding in a window frame, each pair comprising an upper sash and a lower sash;
• at least one set of four pulleys operatively mounted in a housing mounted in said window frame, each pulley of a same set being substantially aligned with one of said sashes;
• and for each set of four pulleys:
• a first cable having two ends, one of said ends being fixed to said upper sash of said first pair and the other end being fixed to said lower sash of said second pair, said first cable being supported by two of said pulleys aligned with said sashes having an end of said first cable fixed thereto;
• a second cable having two ends, one of said ends being fixed to said lower sash of said first pair and the other end being fixed to said upper sash of said second pair, said second cable being supported by two of said pulleys aligned with said sashes having an end of said second cable fixed thereto;
• the improvement wherein for each set of four pulleys, adjusting means are provided for adjusting the relative distance between each pulley and its corresponding sash, said adjusting means comprising:
• three rails provided in the housing;
• three supports, each support being slidably mounted in a corresponding rail;
• each pulley of those supporting the second cable being operatively mounted to a common support;
• and
• means for individually moving each of said support along its corresponding rail to thus adjust the relative distance between a pulley and its corresponding sash, said means comprising, for each support:
• an element integral with a lower portion of the housing,
• a screw having an upper end abutting against or operatively attached to said support, an intermediary portion meshed to the element integral with the housing and lower end projecting from said housing and intended to be engaged by driving means.

A device for adjusting a double-hung sash assembly of the type comprising:

• two adjacent first and second pairs of sashes sliding in a window frame, each pair comprising an upper sash and a lower sash;
• a first cable having two ends, one of said ends being fixed to said upper sash of said first pair and the other end being fixed to said lower sash of said second pair;
• and
• a second cable having two ends, one of said ends being fixed to said lower sash of said first pair and the other end being fixed to said upper sash of said second pair;
• said device comprising:
• housing adapted to be mounted on said window frame,
• a set of four pulleys operatively mounted in the housing, each pulley being intended to be substantially aligned with one of said sashes;
• adjusting means for modifying the relative distance between at least one pulley of those intended to support the first cable and a corresponding sash which is intended to be aligned with said pulley and fixed to a corresponding end of the first cable, and/or modifying the relative distance between at least one pulley of those intended to support the second cable and a corresponding sash which is intended to be aligned with said pulley and fixed to a corresponding end of the second cable;
• and
• wherein said adjusting means comprises:
• at least two rails provided in the housing;
• at least two supports, each support being slidably mounted in a corresponding rail;
• at least one pulley of those intended to support the first cable, being operatively mounted to a support;
• and at least one pulley of those intended to support the second cable, being operatively mounted to a support, and
• means for individually moving each of said supports along its corresponding rail to thus adjust the relative distance between a pulley and its corresponding sash.