US1340560A - Method of making wrenches - Google Patents

Description

H. T. ROBERTS. METHOD QF MAKING WRENCHES. APPLICATION FILED `MAYZI. 1919.

@were for' HENRY T. ROBERTS, 0F NEW YORK, N. Y.

METHOD 0F MAKING WRENCHES.

Specification of Letters Patent.

Patented May 18, 1920.

Application filed May 21, 1919.' Serial No. 298,612.

To all whom t may concern:

Be it known that I, HENRY T. ROBERTS, a citizen of the United States, residing at 35 lVarren street, New York city, in the county of New York and State of New York, have invented a ynew and useful Method of Making Wrenches, of which the following is a specification.

My object is to provide for the produc tion, at the minimum expense, of a novely and simple form of wrench of the flat-sided type the parts of which cannot become acc1- dentally disconnected.

Referring to the accompanying drawing Figure 1 is a viewoin side elevation of a wrench constructed in accordance with my invention. Fig. 2 is a similar view of the two parts forming the handle-portion and stationary jaw of the wrench, before being united. Fig. 3 is a perspective view of the sliding jaw of the wrench; and Fig. 4, a similar view of the nut employed for shifting the sliding jaw along the shank of the wrench, Figs. 3 and 4 being shown slightly enlarged.

In the production of a wrench in accordance with my invention, as I prefer to practise it, l provide the shank portion 5 formed of a fiat bar of suitable metal, as for example steel, of uniform width, on which I cut a thread at one end, the threads being at opposite edges of the bar, as indicated at 6. The part thus provided forms the handle portion of the wrench and is suitably shaped to serve this purpose. The stationary jaw of the wrench, this jaw being represented at 7, is formed of a piece of fiat metal, such as steel, preferably having a neck portion 8 at which this jaw is secured in endwise abutting relation to the threaded end of the handle portion 5 as shown, as by electrically welding these parts together. The sliding j aw of the wrench is re resented at 9 and is preferably formed wit a bifurcated portion presenting arms 1() spaced apart and apertured as represented at 11, at which apertures the jaw surrounds the threaded part 6 of the handle bar 5 and is movable along the latter, the arms 10 presenting an opening 12 therebetween in which a nut 13 screwing upon the threads 6, is located, this nut serving as a means of adjusting the sliding jaw 9 along the handle-portion 5 toward and away from the stationary aw 7.

In the formation of the wrench the sliding j aw 9with the nut 13 positioned in the opening 12, is applied to the threaded end of the handle-portion 5, the jaw 9 and nut 13 to surround this portion and the nut 13 to engage the threads 6 thereof, and the piece of metal forming the stationary jaw 7 then welded in place against the extremity of the threaded end of the bar-portion 57 as shown in Fig. 1.

The portion of the metal of the bar 5 at the end of its thread 6, this portion being indicated at 14:, thus forms a stop which prevents the nut 13 from unscrewing from the bar 5 at this end of the latter, and the jaw 7 forms a stop vat the other end of the wrench for preventing the nut from unscrewing from the bar at this end thereof, the parts of the wrench thus being prevented from becoming disconnected even when roughly handled.

By providing the jaw 9 as shown with one side open between the arm-portions 10, it may be readily made by forging it to shape and then punching out, by means of the common punch-press, the openings for rereceiving the bar-portion 5, as distinguished from requiring drilling and machining to form the openings through the jaw 9 and thus this part of the wrench may be constructed very economically.

What I claim as new and desire to secure by Letters Patent is:

'1. The method of manufacturing wrenches of the flat-sided type, which consists in forming the shank of the wrench of a relatively thin flat bar with threads at its opposite edges throughout a portion only of said bar, applying a sliding jaw to encir cling position on said bar and screwing upon said threads a nut which engages said jaw for operating it, and thereupon welding to the end of said bar opposite to that forming the handle of the wrench, a relatively thin flat piece of metal forming a stationary j aw for cooperation with said sliding jaw.

2. The method of manufacturing wrenches of the flat-sided type, which consists in forming the shank of the wrench of a relatively thin flat bar with threads at its opposite edges throughout a portion only of said bar, applying a sliding jaw to encircling position on said bar and a nut to said threads,

which engages said jaw for operating it,`

and thereupon welding to the end of said bar opposite to that forming the handle of the wrench a relatively thin flat piece of metal forming a stationary jaw for coperation With said sliding jaw.

3. The method of manufacturing Wrenches of the flat-sided type, Which consists in forming the shank of the Wrench of a relatively thin flat bar with threads at its opposite edges throughout a portion only of said bar and presenting a stop surface at the end of said thread, applying a sliding jaw to encircling position on said bar and a nut to 10 said threads, which engages said jaw for operating it, and thereupon Welding to the end of said bar opposite to that forming the handle of the Wrench, a relatively flat piece of metal forming a stationary jaw for co 15 operation With said sliding jaw.

HENRY T. RoBERTS.

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