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> Spencer automatic screw bolt milling machine 1898 lathe
Spencer automatic screw bolt milling machine 1898 lathe
This is a vintage technical engraving and diagram with accompanying article titled "The Spencer Automatic Screw Machine" They are in excellent condition and were published in a British engineering journal, and are dated September 30, 1898. Very fine and detailed views of this machine designed to mill screws, bolts, studs, and cross drilling pins. The article describes this American designed machine and its engineering specifics in great detail.
General information on such machines from the Web:
The automatic screw machine is a fully-automated, high speed lathe. Automatic screw machines are built to produce turned parts like screws, nuts, washers, pins, and collars from round bar stock. The automatic screw machine was patented by Brown & Sharpe in 1865 and Christopher Spencer in 1873. It derived from the turret lathe because there was a need for more production efficiency of turned parts. The cam principle converted the lathe into a machine able to make the same piece configuration repetitively and automatically. Initially the automatic machine had only a single spindle. Multiple spindle automatics came into existence in the late 1800's and weren't used widely until World War I (WWI) when more productivity, more space, and better use of manpower were needed.
Today screw machines are manufactured with multi-spindles and attachments to perform operations like screw-slotting, index drilling, burring, threading, and counter-boring. Single or multiple spindle automatics utilize hydraulic, electrical, or computer numerical controls (CNC).
The overall size of each of the two pages is approx. 11 by 15 inches each. This is an original period item, over 110 years old and guaranteed to be as described.
(Matted and Framed prints not included in this offer)
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When matted and framed these antique prints make very fine gifts! We can mail these directly to a third party if you wish.
