Image galleries in Rails

I'm wondering what the best design for the following would look like in Rails:

A website with three different image galleries, let's say one showing pictures of the company's staff under http://ift.tt/27KxlSy, another one shows pictures of product A at http://ift.tt/257EKZH and the third shows product B under http://ift.tt/27KxhlA.

I assume it would be bad design to create a gallery resource, along with a productA and a productB resource since there will be only one of each and it's really the new photos and not new image collections which will have to be created.

So I'm thinking if it's a good idea to create an images resource and then use single table inheritance, instantiate a gallery_images, productA_images and productB_images and change the routes to the respective ones which I want to show up as URLs. I should probably mention that I don't want to mix up the images for the different sections.

I feel there must be a "proper" way of doing this, I guess tons of websites use a similar scheme.