US1979460A

US1979460A - Screw driver

Info

Publication number: US1979460A
Application number: US589606A
Authority: US
Inventors: Harold S Forsberg
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-01-29
Filing date: 1932-01-29
Publication date: 1934-11-06
Anticipated expiration: 1951-11-06

Description

NOV# 6,v 1934 H. s. FoRsBE-RG 1,979,460Y

SCREW DRIVER Filed Jan. 29. 1932 Yolo IN VEN TOR. f4/V010 J FHSBERG.

Patented Nov. 6, 1934 UNITED STATES PATENT OFFICE Application January 29, 1932, Serial No. 589,606

Claims. (Cl. 145-61) This invention relates to new and useful imhandle may be molded with an opening and the provements in screw drivers. i blade later attached. Although, the handle is An object of the invention is to provide a screw molded preferably of an imitation hard rubber 'driver including a novel handle construction composition it will be understood that it may 5 whereby a better grip may be obtained and be made of any moldable insulating material, as 60 whereby the possibility of the hand of the opbakelite or other phenolic condensation proderator slipping over the handle and into engageuct. Also, the material used may contain a pig-` ment with electrical wires or moving parts of ment to give any desired color or the handles machinery or the like is eliminated. may be painted or the like.

Another object is to provide aiscrew driver in H: idle 10 is molded with a smooth outer or 65 cluding handle se constructed as to prevent palm engaging portion and is provided along a rolling of the screw driver when placed on a flat substantial portion or the major portion of its i supporting surface. length with grooves or utes 16 and the ridges Additional objects and advantages will become or portions 17 between such grooves or utes are 15 apparent from a consideration of the following preferably knurled or roughened in the molding 7o detailed description taken in connection with the operation whereby a better grip may be obtained :accompanying drawing wherein a satisfactory on the handle. It will be noted that since the embodiment of the invention is shown. However, handle is molded the grooves 16 are formed in 'it is to be understood that this description and the handle without any additional cost of manu- 20 accompanying drawing are for the purpose of facture and that the portions 17 between said 75 disclosing one embodiment of the invention and grooves are formed with the knurled or roughened that the invention is not limited to` the details surfaces during the molding operation and withklisclosed but includes all such variationsand out additional expense. Y f ,Y v modifications as .fall within the spirit of the ln- Intermediate its ends but toward its forward Vention and the SCOP@ 0f the appended claims to portion the handle is shaped to provide a reducedA 8o which claimsreference should be had for a deneck portion, or a portion of `less diameter, 18`. nition of the invention. For afportion of its length rearwardly from this In the drawing: neck 18 the handle inclines as at 19 and it should Figl iS a' Side elevatiOIial View Showing a SCIGW be noted that the grooves or utes are extended driver in` accordance With the invention, the inthrough this inclined portion and are of gradually 85 strument being shown in use; v decreasing width as they approach the neck or Fig. 2 is a view taken at right angles t0 Fig. 1 the end of the inclined portion. and Oil an enlarged Scale; Forwardly of the neck 18 the handleiis enlarged Fg- 3 iS 9 View Of a DOIiJiOn 0f the blade 0f or flared as at 20 to provide a guard. As here Fig. 2, the View being taken at Tight. angles t0 disclosed this guard portion 2 0 is provided with 9o `Fig. 2; six relatively long flat surfaces 21 (see Fig. 5) Fig. il is a transverse sectional view on the line and the adjant ends of these surfaces are @om Li4 of Fig-2; nectd by relatively short also preferably flat Fig. 5 is a transverse sectional view on the line portions 22', When the Screw driver 1S in usd' 40 5--5 Of Fig. 2; and as, for example, in the driving of a screw 23` as 95 Fig. 6 is a transverse sectional view on the line suggested in Fig- 1, the thumb 24 and the index 6 6 of Fig. 2. finger 25 of a hand indicated at 26 areishown as Referring in detail t0 the'fl'awng the imengaging or pressing forwardly against the proved handle is generally indicated at 10 and guard 20, I the blade iS generally indiated by the reference Since this guard represents a relatively abrupt 10G 4ChFiI'ELGiSPY 11- Blade 11 HCIUGS a bit Portion 12 increase in the diameter of the handle following and il Shank l3 and intermediate its ends 9 por" the neck portion 18 it will be appreciated that Oll [if Shilflk iS .fi'ilid Orl OXJIJGSB' Sides as the guard WH] prevent the hand fron'l Slipping 2X- 14 Whefb the Shank may be gl'ppe With forwardly over the blade ll and possibly into a Wrench 01 Other W01 fOI turning The Shank engagement with charged wires or moving parts 105 may be provided with the flat surfaces 14 in any of a machine or the like. Further, it will be 'convenient or desired manner, as by swaging. readily apparent that the knul-led or roughened The improved handle 10 is molded of a suitsurfaces 17 will, to some extent, prevent the hand able insulating material and is preferably molded slipping on the handle and it wi1l also be apdirectly onto the blade 1l although if desired the preciated that since the handle is molded of an 110 insulating material with an'end portion of the blade completely embedded in the handle the danger of shocks in the use of the device is eliminated.

A further feature of the present handle is the flat surfaces 21 before referred to. The guard 20 is of an appreciable diameter, and is, in fact, of a slightly greater diameter than the knurled portion of the handle and the at surfaces of the guard portion will therefore prevent rolling of the screw driver when the latter is placed on a flat surface. In this connection it will be seen that the portion of the handle to be gripped is generally circular in cross section and does not therefore present any sharp corners to prevent the handle being tightly gripped.

While the guard portion 20 of the handle is here disclosed as substantially in the form of a lhexagon it will be understood that the guard may be formed with a greater or lesser number of at surfaces as required or as may be more pleasing to provide a bit, said handle enlarged at its inner end to provide a shoulder, and said blade having a portion inwardly of said shoulder ilatted for engagement by a turning tool.

2. In a screw driver, a blade, an elongated handle on one end portion of said blade, said handle comprising a grip portion of one diameter and a neck portion forwardly of and of less diameter than said grip portion, an integral guard portion on said handle at the forward end of said neck portion and comprising a radially extending flange of greater diameter than said grip portion, and the outer peripherial edge of said guard comprising a plurality of fiat faces to prevent rolling of the handle on a surface.

3. In a screw driver, a blade, an elongated handle on one end portion of said blade, said handle comprising a transversely circular grip portion of one diameter and a neck portion forwardly of and of less diameter than said grip portion, a guard portion on said handle at the forward end of said neck portion and comprising a radially extending flange of greater diameter than said grip portion of the handle, and the outer peripherial edge of said flange comprising a plurality of facets preventing rolling of the handle on a surface.

4. A one piece moulded handle comprising a body including a transversely circular gripping portion having relatively wide grooves in its outer surface and relatively Wide surface portions between and spacing said grooves, said surface portions moulded with depressions and ridges to facilitate gripping the handle, a guard comprising a radially extending flange moulded with the handle and of greater diameter than and forwardly of said gripping portion and preventing the hand of an operator slipping forwardly olf the handle, and the outer peripherial edge of said guard comprising a plurality of flat faces to pre- 100 vent rolling of the handle on a surface.

5. A one piece moulded handle. comprising a body including a transversely circular gripping portion having relatively wide grooves in its outer surface and relatively wide surface portions be- 105 tween and spacing said grooves, a guard comprising a radially extending flange moulded with the handle and of greater diameter than and forwardly of said gripping portion and preventing the hand of an operator slipping forwardly oi the 110 handle, and the outer peripherial edge of said guard comprising a plurality of flat faces to prevent rolling of the handle on a surface.