Improvements in or relating to signalling devices

808,929. Electric bells. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. June 7, 1957 [July 24, 1956], No. 22817/56. Class 13. The hammer 5 oscillates within a notch 4 in the periphery of a gong 1 so as to strike alternately opposite sides of the notch. The gong 1 is free to rotate about its securing sc...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	SHANKLAND JAMES
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	808,929. Electric bells. AUTOMATIC TELEPHONE & ELECTRIC CO. Ltd. June 7, 1957 [July 24, 1956], No. 22817/56. Class 13. The hammer 5 oscillates within a notch 4 in the periphery of a gong 1 so as to strike alternately opposite sides of the notch. The gong 1 is free to rotate about its securing screw 3, so that each side of the notch 4 receives an equal blow from the hammer 5.