# US 10,373,786 B2 · Magnetic switch with maintenance override

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- Number: US 10,373,786 B2
- Document ID: US10373786B2
- Status: Granted
- Kind: B2
- Application number: 15/409,387
- Filed: 2017-01-18
- Published: 2017-07-20
- Granted: 2019-08-06
- Earliest claimed: 2016-01-19
- Assignees: C&D Zodiac, Inc.
- Applicants: C&D Zodiac, Inc.
- Inventors: Eric Long; Karim Salha
- Web page: https://patentgrep.com/patent/US10373786B2

## CPC

- H01H 36/02: actuated by movement of a float carrying a magnet
- B64C 1/1407: {Doors; surrounding frames}
- B64D 11/02: Toilet fittings
- B64D 45/0005: {Devices specially adapted to indicate the position of a movable element of the aircraft, e.g. landing gear}
- E05B 15/0205: {Striking-plates, keepers, staples (means for reducing friction E05B17/007; electric strikers E05B47/0046; staples for padlocks E05B67/383; strikers for espagnolettes E05C9/1808)}
- E05B 17/10: Illuminating devices on or for locks or keys; {Transparent or translucent lock parts; Indicator lights}
- E05B 65/0035: {for privacy rooms, e.g. bathrooms}
- H01H 36/0013: {characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits}
- H01H 89/00: Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
- E05B 2047/0069: {bolt position}
- H01H 36/0046: {Limit switches, also fail-safe operation or anti-tamper considerations}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)
- B64C: AEROPLANES; HELICOPTERS
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- E05B: LOCKS; ACCESSORIES THEREFOR; HANDCUFFS

## Abstract

A switch system that includes a switch assembly with a housing having a bottom surface that includes a latch pocket defined therein. The latch pocket includes a top surface and the housing defines an interior that includes either a magnetic switch or a magnet disposed therein. One of the magnetic switch or magnet is positioned adjacent the top surface of the latch pocket in the other is associated with the distal end of latch bolt. The system also includes a latch bolt. When the latch bolt is in the unlatched position it is not received in the latch pocket, the magnetic switch is in the first state and an electrical component is in a first state. When the latch bolt is in the latched position it is received in the latch pocket, the magnetic switch is in the second state and the electrical component is switched to a second state.

## Claims

### Claim 1

A switch system comprising: a switch assembly that includes a housing having a bottom surface that includes a latch pocket defined therein, wherein the latch pocket includes a top surface, wherein the housing defines a housing interior that includes a circuit board positioned above the latch pocket, wherein the circuit board includes a magnetic switch and an override switch, wherein the circuit board positions the magnetic switch adjacent the top surface of the latch pocket, wherein the magnetic switch has a first state and a second state, wherein the override switch is movable between a first position and a second position, wherein when the override switch is moved to the second position an electrical component is switched to a second state, whereby the magnetic switch remains in the first state, wherein the override switch extends from an override switch housing that is connected to the circuit board, wherein the housing includes a switch opening defined in the bottom surface thereof, wherein the circuit board positions the override housing such that at least a portion of the override switch extends downwardly through the switch opening, and wherein the housing includes a cover that is positioned above the circuit board, a latch bolt movable between a latched position and an unlatched position, wherein a magnetic field generating device is associated with a distal end of the latch bolt, wherein when the latch bolt is in the unlatched position the distal end and the magnetic field generating device are not positioned in the latch pocket and the magnetic switch is in the first state, whereby the electrical component is in a first state, and wherein when the latch bolt is in the latched position the distal end and the magnetic field generating device are positioned in the latch pocket and the magnetic switch is in the second state, whereby the electrical component is switched to the second state.

### Claim 2 (depends on 1)

The switch system of claim 1 wherein a bottom surface of the override switch does not extend below the bottom surface of the housing.

### Claim 3 (depends on 2)

The switch system of claim 2 wherein the housing includes a switch indentation that least partially surrounds the switch opening.

### Claim 4 (depends on 1)

The switch system of claim 1 wherein the housing includes an attachment flange extending outwardly therefrom.

### Claim 5 (depends on 1)

The switch system of claim 1 wherein the cover includes projections extending outwardly therefrom that cooperate with stops and a cutout defined in the housing.

### Claim 6 (depends on 1)

The switch system of claim 1 wherein the switch assembly is positioned in a header of a doorframe, and wherein the latch bolt extends upwardly from a door.

### Claim 7 (depends on 6)

The switch system of claim 6 wherein the door is an aircraft lavatory door.

### Claim 8 (depends on 1)

The switch system of claim 1 wherein the latch pocket and the switch opening are both defined in the bottom surface of the housing.

### Claim 9

A method of switching an electrical component from a first state to a second state, the method comprising: moving a latch bolt from an unlatched position to a latched position, wherein the latch bolt includes a distal end that includes a magnetic field generating device therein, wherein in the latched position, the distal end of the latch bolt is received in a latch pocket defined in a housing of a switch assembly and a magnetic switch is switched from a first state to a second state, wherein when the magnetic switch is switched to the second state, the electrical component is switched from the first state to the second state, wherein the latch pocket includes a top surface, wherein the housing defines a housing interior that includes a circuit board positioned above the latch pocket, wherein the circuit board includes the magnetic switch and an override switch, wherein the circuit board positions the magnetic switch adjacent the top surface of the latch pocket, wherein the magnetic switch has a first state and a second state, wherein the override switch is movable between a first position and a second position, wherein when the override switch is moved to the second position the electrical component is switched to the second state, whereby the magnetic switch remains in the first state, wherein the override switch extends from an override switch housing that is connected to the circuit board, wherein the housing includes a switch opening defined in the bottom surface thereof, wherein the circuit board positions the override housing such that at least a portion of the override switch extends downwardly through the switch opening, and wherein the housing includes a cover that is positioned above the circuit board.

### Claim 10 (depends on 9)

The method of claim 9 wherein the switch assembly is positioned in a header of a doorframe, and wherein the latch bolt extends upwardly from an aircraft lavatory door.