Patent ID: 11857816
Assignee: DOWN SAFELY LLC
Field: Other consumer goods (Other fields)
Classification: CPC A  G  H  B | IPC A  B  G  H

Claim 0:
1. A safety interlock system comprising:
a safety harness comprising:
a plurality of buckles to secure the harness to a user; and
a safety attachment ring;

a harness interlock circuit comprising a harness coil attached to the safety attachment ring;
a fall-arrest belt clip configured to be releasably attached to the safety attachment ring, the fall-arrest belt clip attached to a fall-arrest tether; and
an equipment safety interlock circuit comprising:
a fall-arrest transceiver coil disposed on or in the fall-arrest belt clip;
a relay controller configured to generate a safety signal when an increase in a current flowing through the fall-arrest coil is greater than a minimum value; and
a safety interlock relay having a default open state and a closed state, the safety interlock relay configured to transition from the default open state to the closed state only in response to the safety signal,
wherein:
when a load is present across the harness coil, the current flowing through the fall-arrest coil when the fall-arrest belt clip is attached to the safety attachment ring is greater than the current flowing through the fall-arrest coil when the fall-arrest belt clip is detached from the safety attachment ring, and
a difference between (a) the current flowing through the fall-arrest coil when the fall-arrest belt clip is attached to the safety attachment ring and (b) the current flowing through the fall-arrest coil when the fall-arrest belt clip is detached from the safety attachment ring is greater than the minimum value.