I chance passing by and see my well-known theme.
In 1970, I made a local time machine (LTM).
What can I say. Possible to send the object to the past. But it will be his own past, not the past of the world in which the object exists. In addition, a negative rate of time the object is destroyed.
I here it is difficult to write in English because I do not live in England and Google translator terrible and just all confused. If you are interested, then I can put links to my work (in Russian).
For example - http://chektor.blogspot.ru/ There is a text in English.