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Glover’s patent No. 375,350 of Dec. 27, 1887 states that he has invented certain new and useful improvements in saw screws. "My improvement relates to the class of screws that are adapted for use in securing a saw blade to its handle. Prior to my improvement there were in use saw screws having the broad head of its class with the screw shank brazed to the under side; but such a screw is open to the objection that the head is pulled off to readily. Another screw of this class is made by connecting the end of the screw shank to the head by swaging the parts together. The objection to this later screw is that the head is liable to become loose upon the shank and to turn around, thus disarranging the reading matter usually stamped upon the head of the screw; while a further objection is that the peculiar method of making requires that the whole head shall be made of comparatively thick metal.
The object of my improvement is to provide a wrought metal saw screw that, possessing all the advantages of those above referred to, shall be free from the objections and possess advantages peculiar to themselves; and to this end my improvement consists in the combination of a saw screw with its shank treaded and having an integral head, with a shoulder beneath the head and integral projections extending along the shank for a limited distance to prevent the screw from turning in its socket in the handle, and a flanged cap or recessed finishing piece of thin metal and having a central opening that fits about the shoulder beneath the head of the screw, and a nut by means of which the screw is held in place. The label screw’s face is sunk or raised, by means of dies, for a desirable symbol and suitable lettering. An opening in the cap portion of the label screw receives the unthreaded end of the shank. Those two members are swaged together when struck with the die or dies to complete the process."
This patent refers to the fact that the common screws are formed of one piece of wire through the endwise compression of the shank. The Henry Disston & Sons Co. cast their saw screws up to their use of this patent. E. C. Atkins of Indianapolis, In, Woodrough & McParlin of Cincinnati, Ohio and Montague & Woodrough of Chicago, IL also employed this patent.
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