How to maintain beard with DE blades?

[The Waco Kid]

I do a fair amount of traveling and always bring along a DE razor and enough blades to last the trip. Most of the time it's a month to two away from home. I keep a beard for the better part of the year and on these trips I've just let it grow because I don't want to pack a trimmer, charger, etc to keep it short.

I've seen a few combs on Ebay that use some DE blades for hair styling, but didn't know if anyone had ever made a device that would do this for me. I'm picturing an open-comb razor with longer teeth, maybe the distance is adjustable to set hair length? Anyone know if these exist?

 

[imfallen_angel]

Those might exist, but I'd think that it might pull on the hairs quite a bit.

In the old days I remember seeing people use scissors, or a comb to hold the hairs and use a straight.

Personally, I have an anchor beard and I use a trimmer when it gets long enough, but with the number of simple cheap trimmers that are battery (AA/AAA) operated, I wouldn't see why it would be such a problem.