I just got an electric blanket and I thought I'd power it through a timer.
Nostalgia moment. In 1978-79, my roomie and I struggled to pay our oil heating bills for the 6-room apartment we rented in an uninsulated triple decker in Jamaica Plain (Boston). He was a 4th-year med student so was never around and I worked graveyard shift in an emergency room/department. We kept the thermostat set at around 52 degrees -- just enough to keep most of the pipes from freezing. On days when we thought we might meet up and make dinner, we turned the thermostat up to about 66F for a few hours.
To improve the chances of sleep, I had disconnected the front door bell, draped stolen wool army blankets over my bedroom windows and I routinely disconnected the telephone before going to bed each morning. I bought a little mechanical light timer at a hardware store in Brookline and every morning at 6:30 AM, it turned on a blue Sunbeam electric blanket. So, by the time I got home around 7:30, all I needed to do was to tune my Zenith TV to channel 3 for white noise, shuck off my grubby clothes, and roll into bed before I passed out.
Not sure about then, but all of the electric blankets now have timers that will turn them off after a set number of hours.