How to extend mechanical bell duration

Just installed a Ring hardwired bell in place of a traditional pushbutton at my elderly mother's property. I have managed to get it to operate the mechanical doorbells (and yes, they are bells, not chimes) but the Ring only closes the contacts for about half a second. That is not long enough to alert my mother - Ideally I would like the bells to continue to ring while the button is held, but if that is not possible, I need to be able to set the bells to ring for about two or three seconds. I would also like to defeat the 60-second 'guard' timer which seems to prevent a second push of the button. 60 seconds is too long. 30 might be OK. How can I adjust these parameters? (I could add hardware to resolve the 'short ring' problem, but I can't get round the 60 second dead time).