IP Library Granted Patent US 12,615,046
Granted Patent B2
US 12,615,046 · App. 18/763,633 · Granted Apr 28, 2026

System and method for verifying operational integrity of a control head monitor

Inventor: Thomas Kjellman (Uxbridge, MA)
Assignee: Kidde-Fenwal, LLC
H03K17/693H01P1/15H03K17/76
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Quick Facts
Patent No.
US 12,615,046
App. No.
18/763,633
Granted
Apr 28, 2026
Kind
B2
Abstract

A control head monitor including a single pole double throw (SPDT) switch, is disclosed. The SPDT switch includes a first terminal, a second terminal, a third terminal, and a switching element. The load element is connected between an input line and the second terminal. The input line of a detection circuit is connected to the first terminal and an output line of the detection circuit is connected to the third terminal. The switching element is adapted to connect the first terminal and the third terminal during an OFF mode. The switching element is adapted to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal.

Claims (84)

1 . A system for verifying operational integrity of a control head monitor, the system comprising:

the control head monitor comprising:

a single pole double throw switch (SPDT) having:

a first terminal;

a second terminal;

a third terminal; and

a switching element;

a load element; and

a detection circuit having an input line and an output line, wherein the input line is connected to the first terminal and the output line is connected to the third terminal, and the load element is connected between the input line and the second terminal;

wherein the switching element is adapted:

during an OFF mode, to connect the first terminal and the third terminal, and

during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal; and

the detection circuit comprising at least one controller coupled to the input line and the output line, the at least one controller adapted to:

receive at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor; and

verify the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor; and

wherein verifying the operational integrity of the control head monitor includes:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying the input line, the output line, and a bypassing line through the load element as in an undamaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

2 . The system of claim 1 , wherein verifying the operational integrity of the control head monitor comprises:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying at least one of a portion of the input line, a portion of the output line, and a portion of a bypassing line through the load element as in a damaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

3 . The system of claim 1 , wherein the controller is adapted to generate:

a first notification based on the input line, the output line, and the bypassing line through the load element being identified as in the undamaged state; and

a second notification based on at least one of a portion of the input line, a portion of the output line, and a portion of the bypassing line through the load element being identified as in the damaged state.

4 . The system of claim 3 , wherein the first notification and the second notification are at least one of a visual notification, an audio notification, an audio visual notification, and a haptic notification.

5 . The system of claim 1 , wherein the load element is at least one of a resistor, a diode, an inductor, and a capacitor.

6 . The system of claim 1 , wherein the load element is connected on a bypassing line between the input line and the second terminal.

7 . A method for verifying operational integrity of a control head monitor, the method comprising:

providing the control head monitor comprising:

a single pole double throw switch (SPDT) having:

a first terminal;

a second terminal;

a third terminal; and

a switching element;

a load element connected between an input line and the second terminal; and

the input line of a detection circuit connected to the first terminal and an output line of the detection circuit connected to the third terminal,

wherein the switching element is adapted:

during an OFF mode, to connect the first terminal and the third terminal, and

during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal;

receiving, via at least one controller of a detection circuit, at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor;

verifying, via the at least one controller, the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor; and

wherein verifying the operational integrity of the control head monitor comprises:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying the input line, the output line, and a bypassing line through the load element as in an undamaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

8 . The method of claim 7 , wherein verifying the operational integrity of the control head monitor comprises:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying at least one of a portion of the input line, a portion of the output line, and a portion of a bypassing line through the load element as in a damaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

9 . The method of claim 7 , wherein the controller is adapted to generate:

a first notification based on the input line, the output line, and the bypassing line through the load element being identified as in the undamaged state; and

a second notification based on at least one of a portion of the input line, a portion of the output line, and a portion of the bypassing line through the load element being identified as in the damaged state.

10 . The method of claim 9 , wherein the first notification and the second notification are at least one of a visual notification, an audio notification, an audio visual notification, and a haptic notification.

11 . A system for verifying operational integrity of a control head monitor, the system comprising:

the control head monitor comprising:

a single pole double throw switch (SPDT) having:

a first terminal;

a second terminal;

a third terminal; and

a switching element;

a load element; and

a detection circuit having an input line and an output line, wherein the input line is connected to the first terminal and the output line is connected to the third terminal, and the load element is connected between the input line and the second terminal;

wherein the switching element is adapted:

during an OFF mode, to connect the first terminal and the third terminal, and

during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal; and

the detection circuit comprising at least one controller coupled to the input line and the output line, the at least one controller adapted to:

receive at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor; and

verify the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor, wherein verifying the operational integrity of the control head monitor comprises:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying at least one of a portion of the input line, a portion of the output line, and a portion of a bypassing line through the load element as in a damaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

12 . A method for verifying operational integrity of a control head monitor, the method comprising:

providing the control head monitor comprising:

a single pole double throw switch (SPDT) having:

a first terminal;

a second terminal;

a third terminal; and

a switching element;

a load element connected between an input line and the second terminal; and

the input line of a detection circuit connected to the first terminal and an output line of the detection circuit connected to the third terminal,

wherein the switching element is adapted:

during an OFF mode, to connect the first terminal and the third terminal, and

during an ON mode, to connect the second terminal and the third terminal, to generate at least one of an output signal and an absence of an output signal;

receiving, via at least one controller of a detection circuit, at least one of the generated output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor;

verifying, via the at least one controller, the operational integrity of the control head monitor based on the received at least one of the output signal and the absence of the output signal during the OFF mode and the ON mode of the control head monitor, wherein verifying the operational integrity of the control head monitor comprises:

comparing at least one of the generated output signal and the absence of the output signal received during the ON mode with at least one of the generated output signal and the absence of the output signal received during the OFF mode; and

identifying at least one of a portion of the input line, a portion of the output line, and a portion of a bypassing line through the load element as in a damaged state based on the compared at least one of the generated output signal and the absence of the output signal during the ON mode and the OFF mode.

Assignments (4)
SECURITY INTEREST Recorded Jul 17, 2025
From: KIDDE-FENWAL, LLC
To: MGG INVESTMENT GROUP LP, AS COLLATERAL AGENT
Reel/Frame 072039/0358 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 19, 2025
From: KIDDE-FENWAL, INC.
To: KIDDE- FENWAL, LLC
Reel/Frame 071292/0535 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 30, 2025
From: CARRIER GLOBAL CORPORATION; CARRIER CORPORATION; KIDDE IP HOLDINGS LIMITED; KIDDE PRODUCTS LIMITED; CARRIER FIRE & SECURITY, LLC
To: KIDDE-FENWELL, INC.
Reel/Frame 071137/0324 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 8, 2025
From: KJELLMAN, THOMAS
To: CARRIER CORPORATION
Reel/Frame 070768/0608 →
Continuity (2)
Provisional Application 63517889 · Aug 4, 2023
Related Publication 20250047280A1 · Feb 6, 2025
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