Who sang the song with the partial lyrics: machines,machines,we made them to serve us? Would be around the early 70's I think.

1966, actually...it was Manfred Mann.

Machines -   Manfred Mann  (1966)

(M. Shuman) 

 Machines machines
They keep right on movin'
Machines machines
They keep right on movin'

But I am weak
I want to go on home
Too tired to speak
But they won't leave me alone, yeah

Machines machines
They keep right on goin'
Machines machines
They keep right on goin'

I've got to find
A place to rest my head
Machine he smile at me
And say I'm going to be your bed, yeah, oh yeah..

Machines machines
We made them to serve us
Machines machines
We built them to serve us

But till that day
I'm buried in my grave
Yes right until that day
I know I'll always be a slave, a slave, a slave, a slave

To the...

Machines machines
They keep right on winning
Machines machines
They keep right on winning 

 source: Mavco