Rail vehicle comprising a tachometer-speed display device, and a method for operating such a rail vehicle

Patent metadata

Field	Value
Publication number	US-9932055-B2
Application number	US-201414770610-A
Country	US
Kind code	B2
Filing date	Feb 14, 2014
Priority date	Feb 26, 2013
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A rail vehicle has a tachometer-speed display device and an European train control system speed display device. In order to easily avoid the speed being read incorrectly by the vehicle driver in such a rail vehicle, the glass cover of the tachometer-speed display device is an electro chrome glass pane that contains an electrical connection device. A method also operates a rail vehicle which contains such a tachometer-speed display device.

First claim

The invention claimed is:

1. A method for operating a rail vehicle with a tachometer-speed display device and with a second speed display device, which comprises the step of:
providing an electro chrome glass pane with an electrical connection device as a glass cover of the tachometer-speed display device;
wherein an electrical voltage is provided by a vehicle device during start-up at an electrical output of the vehicle device, the electrical voltage changing the electro chrome glass pane into an opaque state.

2. The method according to claim 1 , which further comprises connecting the electrical connection device to a direct voltage source by way of a switching facility.

3. A rail vehicle, comprising:
a tachometer-speed display device having a glass cover, said glass cover including:
an electro chrome glass pane; and
an electrical connection device associated with said electro chrome glass pane; and
said glass cover configured to become opaque when a voltage is applied across said electrical connection device; and
a second speed display device; and
wherein a voltage is applied across said electrical connection device and said glass cover is opaque when said second speed display device is activated and indicates a speed of the rail vehicle.

4. The rail vehicle of claim 3 , wherein the voltage is applied in response to manual actuation of a switch.

5. The rail vehicle of claim 3 , wherein a voltage is automatically applied across said electrical connection device if said second speed display device starts operation.

6. The rail vehicle according to claim 3 , further comprising a vehicle device having an electrical output, wherein said electrical connection device is connected to said electrical output of said vehicle device and configured such that during operation said vehicle device automatically generates an electrical voltage at said electrical output which changes said electro chrome glass pane into an opaque state.

Assignees

• Siemens Ag

Inventors

• Fritzsch Guido
• Litterst Rupert

Classifications

• G01P1/07

  Indicating devices, e.g. for remote indication (indicating working conditions of vehicles G07C5/00) · CPC title

• B61L15/009 Primary

  On-board display devices · CPC title

• B61L25/021

  Measuring and recording of train speed · CPC title

• G02F1/15

  based on an electrochromic effect · CPC title

• B61L2027/0044

  Operations & Transport · mapped topic