US1768604A

US1768604A - Hand tool

Info

Publication number: US1768604A
Application number: US389462A
Authority: US
Inventors: Ralph W Hurd
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-08-30
Filing date: 1929-08-30
Publication date: 1930-07-01
Anticipated expiration: 1947-07-01

Description

R. W. HURD HAND TOOL July l, 1930.

Filed Aug. 50, 1929 Patented July l, 1930 PATENT OFFICE RALPH W. EURIB, OF OAKLAND, CALIFORNIA HAN D TOOL Application led August 3Q, 1929. Serial No. 389,462.

My invention' relates to improvements in the improvements is the provision of a hand tool of this character that is compact, eiii- \cient, and inexpensive to manufacture; a

further object is the provision of means 'on the tool adapted to protect the cutting edge of the blade when it is not in use, as when the tool is deposited in a tool-box .or the like,

4as well as to protect an operator from being accidently cut by the blade when carrying it on his person as when it is deposited in a pocket of his garments or the like.

With the foregoingand still further objects and purposes in view which will .appear as the description proceeds, my invention resides inthe `combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in precise embodiment of the invention herein disclosed can be made within the scope of what is v claimedwithout departing from the spirit of thevinven'tion.

In the accompanying drawings-'- Figure 1 is a plan view of the tool ready for use; 4 Figure 2 is the tool with the top moved;

Figure 3 is a view4 similar to the last preceding ligure, but' with the razor'blade removed. Figure 4 is a plan view of the top plate; Figure 5 is a plan view showing the top platemoved forward to, protect the exposed edge of the blade; Figure 6-shows the top plate moved further forward into a -position for disassembling the device; Figure 7 is a median longitudinal sectional view on line 7', 7' of Fig. 1;

Figure 8 is a like sectional view on line 5 8', 8 of Fig. 5;

plate re- Figure 9 -are longitudinal sectional views of the several elements comprising the tool, disassembled Fig. 10 is a crosssection on line 10', 10 of Fig. 1;

Fig. l1 is a cross sectional view) on line 11', 11', Fig. 1;

Figure 12 is a view in cross section on line 12', l2' of Fig. 1; j

Figure 13 is a sectional view on line 13', 13' of Fig 3;

Figire 14 is aview on line'14', 14' of Fig. 4; an

Figure 15 is a longitudinal sectional view on line 15', 15 of Fig. 4.

The drawings represented by the Figures 10 to 15, inclusive, are of a relative larger scale than the drawings of the preceding figures.

Referring to the drawings in detail, throughout which like reference characters designate like parts:

The

numerals

1, 2 and 3, designate the top plate, bottom plate, and the razor blade, respectively, of the .present hand tool. j

f The plates 1 and 2, which are formed of sheet metal, preferably of soft spring-steel to provide the proper degree of resiliency, and which plates coact for holding the blade 3 operatively therebetween, are bowed longitudinally outwardly as best shown in Fig. 9, and have front edges 4 and 5 substantially at right angles with the axes of the plates, and rear edges 6 and 7, the latter preferably rounded in the plane of the plates that they? may be the better gripped by the hand 'of the operator.

On the inner side of the top plate 1, adjacent its opposed ends 4 and 6, are formed oblong

indentations

8 and 9, of which the indentations 8 register with the openings 10 in the blade 3. In striking the

indentations

8 and 9, there are formed on the opposite side of the plate

oblong elevations

8 and 9 extending longitudinally ofthe plate.

Intermediate the elevations 8', 9', 1s formed a comparatively broad slot 11, the rearwardly end of which is enlarged laterally, to provide side extensions 12, while the side edges of its forward portion are provided with upwardl extending, rearwardly tapering, wedge-s aped binding shoes 13 the latter terminating preferably short of the extensions 12:4

Upon the inner side of the bottom plate 2 are formed

conical bosses

14, 15, of which the former register with, and project through, the openings 10 in the blade 3.

Out of the mid body portion of the plate 2,l intermediate the

bosses

14, 15, are struck a pair of spaced uprights 16, which terminate at their free ends in o posed outwardly projecting lookin lips 17) the lower ends of the uprights 16 eing left integral with the body7 of the plate.

The blade 3, through the openings 10 of which the bosses 14 project, is normally stationary relative to the late 2, but may be removed therefrom by li ting it off the bosses when it is desired to reverse it or to replace it with another blade. The blade shown in the present form ofthe device, is of the Gillette or double-edge ty e. Other types or forms of blades having t erequired openings, may be used if desired.

The plates 1 and 2 are preferably substantially of equal lateral and longitudinal dimensions with boundaries registering when disposed in normal or operative o sition, which is best shown in Fig. 1, an in which position the bosses 14 are disposed to project through the openings in the blade 3 into the forward end portion of the indentations 8, and boss 15 disposed to project into the forward end portion of the indentation 9, and the uprights 16 projecting through the forwardly end portion of the.

slot 11 with the locking lips17 bearin on the forwardly end portions of the bin 'ng shoes 13. The plates 1 and 2 are bowed outwardly in opposite directions longitudinally when disassembled (see Fig. 9) and springpress against the blade from opposite sides when assembled and locked in operative position (see Fig. l) by means of the locking lips 17 projectingthrough the slot 11 and bearing against the shoes 13. L

When-the tool is not in use and it is desired to protect the blade from injury, or from doing injury by accidently cutting an object as when carried in the pocket or the like, the top plate 1 is moved forwardl relative to the bottom plate 2 and the bla e 3, into the position shown in Fig. 5. In this position, it will be noted, the lips 17 are disposed intermediate the shoes 13 and the slot extensions,12, the bosses 14 moved to the rear end portions of the indentations 8 and the boss 15 moved to the rear end portion of the indentations 9. And when it is desired to disassemble the device, as for the replacement of a blade or the like, the to plate 1 is moved still further forward re ative to the bottom rplate and blade, until the bosses 14.- and 15 are forced beyond their meaeoe respective indentation in the top plate, and the li s 17 register with the extensions 12 (see ig. 6) vwhen thespring-tension of the plates 'forcesrtheir mid portions to move apart bodily and the lips to slip through the extensions 12. The plates are now unlocked and the top removable by lifting it up. To assemble the plates and blade, the modus operandi just described for disassembling them is reversed.

18 designates a knurled area on the top plate intermediate the slot l1 and elevation 9,which knurling is formed either by indenting' or by cutting into the surface of the outer side of the plate to roughen it to provide better frictional eifect when gripping it by the thumb or fingers of the hand for operatively moving one of the plates relative to the other. This knurling of the top plates, while not shown in Figs. 5 and 6, and not shown at all in the bottom plates, is ntended to be carried out in both places.

It is to be noted that while the forwardly left-hand corner of the plate 1' is rounded,

`the right-hand corner is substantially rectangular. This is done to provide a comparatively angular projection at saidr righthand corner useful for probing and scraping in the valleys and corners of window sash and the like when the tool is employed for cleaning same.

What is claimed is:

l. In a hand tool of the character described embodying a pair of plates adapted to cooperate for holding a razor blade between registering ends thereof, of a plurality of oblong indentations disposed in spaced parallelism on the inner side of one of said` plates and extending longitudinally thereof, said indentations being concavo-convex 1n cross section and forming oblong elevations on thefopposite side of said plate, a plural-l it?l of conical projections on the inner side o the other of said plates disposed tooperatively slide in said indentations, and means on one of said plates projecting through a mid portion of said other plate and bearing thereagainst for movably binding said plates together. U

2. In a hand tool of the character described embodying a pair of plates adapted to cooperate for removably holdin a razor blade therebetween, of three ob ong deressions formed in the inner surface of the orward end portion of one of said plates, said depressions disposed in lateral spaced relationl and extending longitudinally of said plate, an oblong depression formed in the surface of the inner side of the rear end portion of said plate, said depressions being concave-convex in cross section and forming oblong elevations on the opposite side of said plate, a plurality of conical projections on the inner side of the other of said plates disposed to operatively slide longiu, tudinally along in said depressions, and means in the mid part of one lof said plates projecting 'through an opening in the other plate and bearing against the outer side f the latter, said means adapted for relatlve- 1y movably binding said plates removably together. f

3. In a hand tool of the character described, of a plate having' an oblong depression formed in the inner side of its forward end portion, an oblong depression formed in the inner side of the rear end portion of said plate, said depressions bein concavoconvex in cross section and formlng elevations on the outer side of the plate, said plate having a slot intermediate said depressions, said depressi'ons and slot being disposed in general axial alignment, and a wedge-sha ed binding shoe on oppositel sides of sald slot.

4s. In a hand tool of the character described, of a plate having a slot in`its mid part having a wedge-shaped binding shoe on opposite margins, and a plate having a pair of laterally spaced uprights projecting through said slotsaid uprights terminating at their free ends in opposed locking lips adapted to slidably bear against said binding shoes for movably binding said plates :i0 to ether.

n testimony of the foregoing being my own, I ,have hereunto aixed my signature this 22nd day .of Au 1929.

' istlhlH W. HURD.