Jaxenro,
Do you mean this? -
Tappey and Lumsden: Petersburg, VA., firm. Producer of revolving cannon designed by Henry Clay Pate (q.v.). The Petersburg Express of May 11, 1861, noted that Tappey & Lumsden had completed a five-shot cannon of 3.13-inch caliber weighing 300 pounds. It fired a four pound ball 1900 yards. A pair of these weapons was turned out. One burst during firing tests and the other was set aside for the duration of the war. It survives today at Petersburg.
PS: I *think* this is the book I used to have in my library, which illustrated practically every piece of ordnance used by North and South. You can probably get it from the local library, through inter-library loan.
Hazlett, James C., Edwin Olmsted, M. Hume Parks, Field Artillery Weapons of the Civil War, 2nd ed., 1988