Pawl lock with closure clamp screw

US8870127B2 · kind B2 · utility

Assignee

• SIEMENS SCHWEIZ AG · CH

Inventors

• Walter Ackeret · Seuzach, CH
• Rudolf Herrmann · Augsburg, DE
• Andreas Infanger · Rafz, CH

Key dates

• Filing date: Jan 18, 2012
• Grant date: Oct 28, 2014
• Expiry date: Jun 9, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B61L5/10
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A lock bearing for a points setting arrangement has a lock bearing screw penetrating a foot of a setting tongue and a spring package arranged between the foot and the screw head of the screw. Therefore the lock bearing screw can be tightened with a relatively narrowly definable torque range and still has the rotation reserve to bring the position of the head of the lock bearing screw into line with a hole in a safety plate mapping the screw head which then, upon being inserted as previously known, latches in place over the head of the lock bearing screw. An alternative embodiment has a lock bearing with a lock bearing screw penetrating a foot of a setting tongue and an anti-rotation ring enclosing the head of the lock bearing screw in an annular, force-fitted manner with an outer toothing and a safety plate matching the outer toothing.