US66009A

US66009A - Joseph s

Info

Publication number: US66009A
Authority: US
Publication date: 1867-06-25
Anticipated expiration: 1884-06-25

Description

I y @uitrit tatto atnt @High l JOSEPH S. FARNSWORTH, OF WINDSOR, VERMONT, ASSIGN OR TO'EBENEZER G. LAB'ISON,PRESIDENT OF- THE WINDSOR MANUFACTURING COMPANY.

Letters Patent No. 66,009, dated June 25, 1867.

' INPROVBMENT IN mss rca sWAeINe NND PUNGNING THE JAWS or wNBNcHEs.

the 'tlgnult nfemt tu in ligne ettets rztin mn mating ont nf tti sume.

TO ALL WHOM IT MAY CONCERN:.

' Be it known that I, JosEPH'S. FAnNsivonrH, oi'-Vlindsor,I in the county of Windsor, in the State ot' Vermont, have .invented afnew and improved Mode in the Process of Forging and Siva-ging the Sliding-Jaw of an Adjustable Screw-Wrench; and 'I do hereby declare that the following is a full and exact description thereof, reference being had tothe accompanying drawings und to the letters of reference marked thereon.4 V

Figure 1 shows the jaw in perspective, wherein M is a mortise, in constructing which the solid meta-l is displaced and converted'in'to the arm R, necessary for the screw appliance whereby the jaw is made to slide.

y 4Figure 24 shows a pair of dies'A B, by which the process of forging is begun, and wherein the outside shape of-the jaw J' is formed. A is the outline of the upper or striking-die; B that of the anvil or lower die. Both are -indicatori by black lines, and represented as in a. state of rest, after A has been dropped, or otherwise i ilriven'npon B. The dotted red lines indicate the face of th matrix; the dotted black lines the shape of the jan', as drivenV therein by the strokeot`- the die A. y' Figure 3 shows 'a pair of dies A' B', indicated by Yblack lines, by which the process of forging is continued,

and wherein the punch Pis indicated by red dotted lines in the die. A' is driven into thejaiv J', indicated by black-,dotted lines in the die' B', 'so as partly to displace the metal for the mortise.

' Figure 4 shows a pair of' dies, A" B", in black lines, by which theprocess of forging and sii-aging is comy plcted, and wherein Vthe punch P', in red dotted lines, converts the rnetal taken ont of the mortise into the arm R', and thejan' J" is left as indicated by the black dotted-lines in the figure, and as shown iu perspective by i'ig .1 t `Vi'hen now, A" falling, has driven punch P' through the jaw, the punch by the heat of the hot jaw, l enlarges, and the size of mortise, by the cooling of the 'hot iron, contracts, and the consequence is that the l jawjs shrunk on tightly to P'. To remedy this, I lift my drop and so lift oi A" from the punch P', and then by a slight stroke of.a hunnnur I loosen P' by driving it down through the hole of B", that hole being Ina-de l p through B", and P' bingmade tapering for that purpose. l 'The advantages of constructing the mpv-able jaw of an adjustable screw-wrench by this process of forging i and swaging are numerous, lsome of nihich are: v I First, I am thus able to make the wrench of Wrought Viron or of steel, instead of malleable iron, the usual `materialvfor making such serewwrenches; malleable iron being comparatively of little value, so liable is it to break where strength is required. I f l Second, by this process of forging and swaging, I make a wrought-iron or 'steel wrench cheaper than the cost'of one made out of malleable iron, so offering it to the'publie at a. less cost; the finishing up of a malleable N'vr'ench being more-expensive than that of wrought iron or steel, and the malleable iron costing more per pound than wrought iron or steel.

Third, compared with a wrought-iron or steel wrench made by the old process of forging, it is vastly -chapenanfd much better, it* not being liable to the imperfections arising from the old mode of lapping and Welding.

Fourth, by this process I save all the Vstock taken from the Ainortise, as I'convert the same into the armv in all that variety of adjustable screw-wrenches having mortise and arm, and I construct the teeth from the easel hardened iron or steel jaws, instead of having to insert them, as when the jaws are of malleable iron, in those cases'where I apply my inventionto griping wrenches.

What I claim as my' invention, a-nd desire to secure by Letters `Patent, is-f The combination of dies and punch, constructed and operating substantially as described. Windsor, July 6, 1866.

Witnesses:

HENRY WAnnNnn, Hman' T. Love.

J. s. NARNSWORTH.