Cash Register and Indicator
A cash register or till is a mechanical or electronic device for calculating and recording sales transactions, and an attached cash drawer for storing cash. The cash register also usually prints a receipt for the customer. In most cases the drawer can be opened only after a sale, except when using a special key, which only senior employees and the owner have. This reduces the risk of employees stealing from the shop owner by not recording a sale and pocketing the money when a customer does not need a receipt but has to be given change. In fact, cash registers were first invented for the purpose of eliminating employee theft.
Government Printing Office The Official Gazette of the United States Patent Office (Washington, DC: Government Printing Office, 1895)
Courtesy the private collection of Roy Winkelman