US2009272A - Safety razor - Google Patents

Description

J. MUROS SAFETY RAZOR July 23, 1935.

Filed Dec. 3, 1934 2 Sheets-Sheet 1 July 23, 1935. J, MUROS 2,009,272

SAFETY RAZOR Filedl Dec. 5, 1934 2 Sheets-Sheet 2 l//// /////////'I y f lurrii' T71 veriovf Patented July 23, 1935 UNrrED STATES Arr Aorricia SAFETY RAZGR Application December 3, 1934, Serial No. 755,655

11 Claims.

This invention relates to safety razors of the type employing a sectional cap in combination with a guard or other blade supportingl member. The general object of the invention is to improve the accuracy and speed of the blade-clamping and releasing operations and to facilitate manufacture of razors of this type.

With these ends in view an important feature of the invention consists in a novel guard or bladesupporting member which as herein shown is constructed of sheet metal and formed by die-pressing or moulding into a characteristic shape, that is to say, it is formed with an elongated depressed recess or chamber in which may-be located the movable blade-positioning mechanism of the razor. By providing such a chamber, it is, therefore, possible to avoid machining a long slot in the guard, for example, to receive a blade-locating bar. On the contrary in the razor of my invention the body of the blade-locating bar and its support may be contained in the moulded recess, although if desired the end walls of the recess may be opened to permit the passage of connections. l

Another feature of my invention consists in a blade-carrying member which is pivotally mounted for self-adjusting movement about a transverse axis. By this construction the pressure upon the blade is equalized in the clamping operation, regardless of irregularities in construction, and uniform treatment of the blade edge is secured throughout its length. As a novel feature of the blade carrier I preferably employ a bladelocating bar constructed on sheet metal folded upon itself about a vertex line. By utilizing a blade-locating bar of this construction it is possible to form from a. single blank not only the bar but also the associated parts which, with the bar, go to make up the blade-carrier or spider. Preferably the ends of the bar are turned outwardly to form the blade-engaging portions of the carrier and if desired portions of said arms may be turned out as ears acting as limit stops to determine the amplitude of movement of the rocker bar, to gauge the proper opening of the cap sections and in general to hold the parts of the razor against being separated into disassembled relation.

A sheet metal guard of the characterdisclosed also lends itself to the formation of integral cam projections which may be utilizedas part of the cap-swinging mechanism, thus avoiding the necessity of separatelyadjusting and locating studs for that purpose.

These and other features of theinvention will be best understood and appreciated from the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings, in Which- I Fig. 1 is a view in perspective of the razor in closed condition; .w

Fig. 2 is a View of the razor in vertical crosssection and on an enlarged scale;

Fig. 3 is a View of the razor head in cross-section and on the same enlarged scale.;

Figs. 4 and 5 are cross-sectional views on the line 4, 5 4, 5 of Fig. 7 showing the cap sections in Aopen and closed positions, respectively.

Fig. 6 is a fragmentary View in perspective of the underside of the razor' head;

Fig. v'I is a plan view showing the razor head with the cap sections in open position and a blade therein, and

Fig. 8 is a fragmentary view in perpsective of one end of the guard.

In the preferred' embodiment of the present invention the guard l0 is utilized as a bladesupporting member for shaping the blade when it is clamped in shaving position. The guard vided at its ends with downturned walls and along its longitudinal edgeswith spaced guard teeth il of the usual construction. It is formed by die-pressing or-moulding a single piece blank and is provided with an elongated depressed reentrant recess or chamber I2 of diamond- Ashape and adjacent convex blade-supporting faces. The guard is provided in eachv end with a centrally disposed slot I3 opening through the Wall of the chamber I2. It is provided also near each corner in the outer downturned Wall With a recess of irregular shape which provides an abutment face l5 and a 'cam projection I shaped and located for swinging the cap sections in a manner which will be presently described.

The guard l0 is rigidly connected to a tubular head il, best shown in Fig. 2, the inner end of the head Il being spun over upon the bottom of the recess ll2 of the guard. The head is shouldered at its lower end to receive the handle barrel i8. Within the barrel is disposed an elongated tubular nut threaded at its upper end, having'a knurled head 2l at its lower end and being retained in place against longitudinal movement in the barrelby a circumferential groove into which is pressed a circumferential rib i9 in the barrel. y

In Fig. '7 is shown one form of blade suitable for use with the razor of my invention. It is provided with a central longitudinally-extending I0 is constructed of heavy sheet metal and pro- 2 blade-locating slot and with a reentrant recess in each corner which defines an elongated unsharpened centrally-disposed portion 25 at each end of the blade. The blade is sharpened at its opposite longitudinal edges for'shaving and the slot may be provided with spaced transverse enlargements for the reception of blade-locating studs of various shapes in other razors.

Within the head |1 is disposed a stem or spindle 30 provided at its lower end with threads meshing with the threads of the cylindrical n ut 20. It is slotted at its upper end for the reception of a cross-bar 3| which is pivotally mounted inthe spindle and constitutes a rocker. The bar 3| is made by longitudinally folding a sheet metal blank and is transversely perforated and its pivotal connection is formed with the stem 30 by die-pressing the material of the spindle into the perforation of the cross-bar thus forming oppositely disposed pivot studs 35. The ends of the folded bar are oifset downwardly into pro- 'Jections 32 and the ends of these oiset projections are turned outwardly and oppositely to form outwardly-extending transverse arms 33. These arms are located beneath the elongated ends 25 of the blade and act to lift the blade and elevate uit above the blade-engaging face of the guard when the bar 3| and the carrier structure associated therewith is moved upwardly. Each of the offset projections 32 is provided with an outwardly turned ear 34, best shown in Figs. 4 and 5 and these ears are arranged to be brought into contact with the under surface of the guard IIJ when the carrier is raised and serve three distinctfunctions, viz., they limit the tilting movement of the rocker bar 3 I; they gauge the proper opening of the cap sections, and they prevent thc bar 3l from being carried through the guard beyond the position shown in Fig. 5.

The cap sections 36 are concavely formed and cooperate with the guard l0 in imparting a transverse curvature to the blade when the latter is clamped in shaving position. Each cap section is provided at both of its outer corners with a downwardly extending arm 31 and these arms in turn are pivotally connected to the outwardly extending arms 33 of the carrier. In this connection the arms 33 are provided with slightly elongated slots for the pivot pins of the arms 31 to afford clearance and insure free opening and closing movement of the cap sections.

Each of the arms 31 passesdownwardly through one of the recesses in the corners of the guard and each arm is formed at its lower end with a semi-circular inwardly projecting cam piece 38. These cam pieces 38 are adapted to co-operate with the stationary cam projections or shoulders I6' of the guard as the carrier is raised and accordingly to swing the cap sections into open position as the carrier is moved upwardly. In this movement the arms 31 swing outwardly into horizontal position and rest upon the abutments l5, as shown in Fig. 5, the flat faces of the cams 28 extending almost vertically in this position. In lthe downward movement of the carrier the pivot points of the arms 31, being moved below the abutments I5, the latter act to swing the arms upwardly and the cap sections are moved toward their closed position, `the cams 38 turning and passing endwise down into the -space inthe guard adjacent thereto.

It will be noted -that the ears 34 are provided atthe lower edge of each side of the oifset portions 32 of the blade-locating bar 3| and that these ears are turned outwardly in opposite directions in position to engage the under-surface of the guard I0 when the stem 30 and the blade carrier are fully lifted.

Ihe razor is shown in Figs. 1 to 4 in closed position in which the blade 24 is held in a position of pronounced transverse curvature by the cap sections 36 in co-operation with the guard I0. In this position the head 2| has been turned to the extreme limit of its movement in a clockwise direction and the stem 30 moved downwardly to the limit of its movement. If now it is desired to open the razor for the purpose of removing or replacing the blade the knurled head l2| may be turned in a counter-clockwise direction whereby the stem 30 is lifted carrying the closed cap sections vertically upward away from the blade 24 without changing their position until the outer end of the semi-circular cam pieces engage the underside of the cam projections I6 on the stationary guard. When this happens the arms 31 are swung outwardly until arrested by the abutments I5 with the cap sections in wide open position as shown in Fig. 7. In this position the blade may be conveniently removed and replaced and whereupon the razor may be closed by turning the head 2| in the opposite direction.

After replacing the blade the razor may be closed by turning the knurled head 2| in a clockwise direction, whereupon the stem 30 is lowered together with the carrier or spider for thecap sections. In this movement the cap sections are rst swung together by theco-action of the abutments 5 with the under side of the arms 31. After the cap sections have reached this condition, as indicated by the dotted line position of Fig. 4, they are moved downwardly, in contact with each other and into blade-clamping relation with the guard, as indicated by the full line position of Fig. 4.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent isz- 1. A safety razor comprising a, blade-supporting member, a blade carrier including a pivotally mounted bar extending longitudinally of the supporting member and having transverse arms thereon for engaging a blade at equal distances from the axis of said bar, and co-operating cap sections movably connected to said transverse arms.

2. A safety razor comprising an elongated guard having a blade-supporting face, a handle secured to the guard, a spindle movable longitudinally in the handle and having a rocker member pivotally mounted therein, and a carrier in which said rocker is incorporated and which has blade-engaging portions disposed at equal distances from the axis of the rocker, and cap sections movably mounted on the carrier.

3. A safety razor comprising a guard member having a blade-engaging face, a blade-locating bar projecting above said face and including in its structure side portions folded downwardly from a vertex line and provided with arms turned transversely beneath the body of the guard member.

4. A safety razor comprising a guard member, a movable carrier including a bar having side portions folded downwardly from a vertex line, cap sections pivotally mounted on the carrier and movable outwardly as the carrier is moved toward the guard member, and ears on the side portions of the bar arranged to engage the guard member and thus gauge the proper opening of the cap sections.

5. A safety razor comprising a handle, a guard, and a carrier including a bar pivotally mounted in the razor and carrying movable cap sections, and ears disposed transversely on the bar beneath the guard and so arranged as to limit both the pivotal movement of the baz and the opening movement of the cap sections.

6. A safety razor comprising a guard having a tubular head secured thereto, a stem movable in the head and having a. forked end, a spider including a perforated bar mounted in the vforks of the stem by pivot studs formed integral with the stem, and cap sections carried by the spider.

7. A safety razor comprising a sheet metal guard having downturned end walls and guard teeth along its longitudinal edges and an abutment face formed in the endmost tooth on each side of the guard and a movable carrier having cap sections pivotally mounted thereon outside the downturned walls of the guard and arranged to rest upon said abutment surfaces when in open position.

8. A safety razor having, in combination, a guard with a chamber of 'substantially diamondshaped contour therein, a stem passing upwardly into the chamber, a rocker member pivoted to said stem within the chamber, a carrier, cap sections pivotally mounted thereon, and connections between said rocker and carrier extending through the walls of the chamber.

9. A safety razor having, in combination, an

having downturned end end walls of the guard, each arm having surfaces v co-operating with one abutment to swing the cap open and with the other abutment to swing the cap shut.

10. In a safety razor, a sheet metal guard member of substantially uniform thickness throughout, having spaced guard teeth along its edges and having the material of its body molded in the form of an elongated diamond-shaped recess in one face and a corresponding diamond-shaped projection in the other face, said recess being shaped to contain movable blade-locating means, and the body of the guard about the margin of said recess being generally convex in contour.

11. A safety razor comprising a sheet metal guard of substantially uniform thickness throughout, and having the material of its body molded to provide a recess of maximum width in the center of the guard, tapering toward either end and oppositely slotted in its end walls, a spindle movable in the widest part of the recess, a cross-bar connected to the spindle and extending out through said end wall slots, and cap sections pivotally connected to said cross-bar outside said recess.

JOSEPH MUROS.

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