Patent ID: 11958083
Assignee: JOHNSON CONTROLS TYCO IP HOLDINGS LLP
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 10:
11. A sash system, comprising:
a sash;
a counter-weight coupled to the sash by a coupling member;
a locking mechanism coupled to at least one of the sash and the coupling member and transitionable between an open configuration where the locking mechanism does not inhibit movement of the at least one of the sash and the coupling member, and a locked configuration where the locking mechanism inhibits movement of the at least one of the sash and the coupling member; and
a controller coupled to the locking mechanism and configured to control operation of the locking mechanism to selectively transition between the open configuration and the locked configuration based on a condition of the sash;
wherein the locking mechanism comprises a gripping member and an electromagnet;
wherein the locking mechanism selectively inhibits motion of the sash by engaging the gripping member with the coupling member;
wherein the gripping member is configured to engage the coupling member due to an electromagnetic force acting between the electromagnet and the gripping member.