# US 11,929,218 B2 · Rocker arm of an electric switch, blocking device with such a rocker arm, and electric switch with such a rocker arm and such a blocking device

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- Number: US 11,929,218 B2
- Document ID: US11929218B2
- Status: Granted
- Kind: B2
- Application number: 17/241,413
- Filed: 2021-04-27
- Published: 2021-11-04
- Granted: 2024-03-12
- Earliest claimed: 2020-04-29
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: Ekkehard Plechinger
- Web page: https://patentgrep.com/patent/US11929218B2

## CPC

- H01H 9/282: {and a separate part mounted or mountable on the switch assembly and movable between an unlocking position and a locking position where it can be secured by the padlock}
- H01H 23/143: {having a generally flat elongated shape}
- H01H 23/205: {using a compression spring between tumbler and an articulated contact plate}
- H01H 23/28: with three operating positions
- H01H 71/521: {Details concerning the lever handle}
- 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)

## Abstract

In a rocker arm of an electric switch, the electric switch is actuated by the rocker arm for setting definable positions. The rocker arm of an embodiment includes a first part, for setting the definable positions, and a second part, movable between a first position and a second position. In the first position of the second part, the first part can be moved into the definable positions; and in the second position of the second part, the movement of the first part is blocked.

## Claims

### Claim 1

A blocking device comprising:
a rocker arm of an electric switch, the electric switch being actuatable by the rocker arm for setting definable positions, the rocker arm including
a first part, configured to set the definable positions, and
a second part, movable between a first position and a second position, the second position being farther from the first part than the first position; and
a slotted link including holes, a first end of the second part of the rocker arm being configured to enter the holes at assigned positions among the definable positions,
wherein, in the first position of the second part, the first part is movable into the definable positions, and
wherein, in the second position of the second part, movement of the first part is blocked.

### Claim 2 (depends on 1)

The blocking device of claim 1, wherein the second part is pressed by a spring in a direction of the first position.

### Claim 3 (depends on 1)

The blocking device of claim 1, wherein the second part is configured to extend within the first part.

### Claim 4 (depends on 1)

The blocking device of claim 1, wherein the first part includes a first bore and the second part includes a second bore, the first bore and the second bore being configured to align in the second position of the second part.

### Claim 5 (depends on 1)

The blocking device of claim 1, wherein the rocker arm is configured to move through part of an arc of a circle with a center point.

### Claim 6 (depends on 5)

The blocking device of claim 5, wherein the second part is displaced radially, upon changing between the first position and the second position.

### Claim 7 (depends on 1)

The blocking device of claim 1, wherein the definable positions include at least an ON position for closing a circuit and an OFF position for opening the circuit.

### Claim 8 (depends on 7)

The blocking device of claim 7, wherein the definable positions further include a tripped position.

### Claim 9 (depends on 1)

The blocking device of claim 1, wherein, in the second position of the second part of the rocker arm, the first end of the second part is configured to block the movement of the first part by entering one of the holes.

### Claim 10 (depends on 1)

The blocking device of claim 1, wherein the slotted link is provided with perforated holes configured to be broken out by a user.

### Claim 11 (depends on 1)

The blocking device of claim 1, further comprising:
a shackle lock, a shackle of the shackle lock configured to hang through in-line bores in the second position of the second part of the rocker arm.

### Claim 12 (depends on 1)

An electric switch, comprising:
the blocking device of claim 1.

### Claim 13 (depends on 2)

The blocking device of claim 2, wherein the second part is configured to extend within the first part.

### Claim 14 (depends on 2)

The blocking device of claim 2, wherein the first part includes a first bore and the second part includes a second bore, the first bore and the second bore being configured to align in the second position of the second part.

### Claim 15 (depends on 2)

The blocking device of claim 2, wherein the rocker arm is configured to move through part of an arc of a circle with a center point.

### Claim 16 (depends on 2)

The blocking device of claim 2, wherein the definable positions include at least an ON position for closing a circuit and an OFF position for opening the circuit.

### Claim 17 (depends on 16)

The blocking device of claim 16, wherein the definable positions further include a tripped position.