Balancing spring system for sliding window sash

A connector strip adapted for connecting a window sash assembly slidably mounted in channels of opposed window jambs to a biasing mechanism applying an upward force to said window sash assembly, said connector strip having:

• an elongated rectangular shape defining a front surface and a rear surface;
• at least two slots in said connector strip, each of said slots extending from said front surface to said rear surface and adapted for releasable connection of said connector strip to said biasing mechanism;
• said connector strip having a connecting head section at a bottom thereof adapted for connecting said connector strip to said window sash assembly.

A balancing spring system for facilitating the opening and the closing of a window sash assembly slidably mounted in channels of opposed window jambs, said balancing spring system comprising:

• a connector strip having an elongated rectangular shape defining a front surface and a rear surface, at least two slots formed in said connector strip, each of said slots extending from said front surface to said rear surface, the slots being aligned with respect to one another in a longitudinal vertical dimension of the connector strip and spaced by a given distance;
• said connector strip having a connecting head section at a bottom end thereof, adapted for connection to a window sash;
• at least a first and a second curled ribbon spring adapted to be mounted idle and free to rotate in a vertical dimension of one of said channels of said window jambs, the curled ribbon springs being generally spaced by said given distance, the curled ribbon springs each having a connecting free end section, for connecting said curled ribbon spring to said slots of said connector strip such that the curled ribbon springs have a same length, whereby said first and second curled ribbon springs apply an upward force to said window sash assembly.