US2125811A

US2125811A - Adjustable head safety razor

Info

Publication number: US2125811A
Application number: US160687A
Authority: US
Inventors: Robertson George Lawson
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-08-24
Filing date: 1937-08-24
Publication date: 1938-08-02
Anticipated expiration: 1955-08-02

Description

AUS 2, 1938. G. L. ROBERTSON 2,125,811

ADJUSTABL HEAD SAFETY RAZOR Filed Aug.` 24, 1957 3 sheets-sheet 1 YRW,

Aug. 2, 1938.. G. L.. ROBERTSON ADJUSTABLE HEAD SAFETY RAZOR Filed Aug. 24, 1957 3 Sheets-Sheet 2 ATTORN EYS Aug., 2, 1938. G. L. ROBERTSON ADJUSTABLE HEAD SAFETY `RAZOR v 5 sheets-sheet s Filed Aug. 24, 1957 ATTORNEYS Patented Aug. Z, 1938 UNITED PATENT oFFicE Application August 24,

6 Claims.

This invention relates to safety razors, and has for the primary object the provision of an eicient and economical device of this character wherein the blade holder thereof maybe easily and 6 quickly adjusted to assume variable angular positions with respect to the handle thereby aiecting the hoe style angle of the razor and to permit either cutting edge of the bladeto ybe presented `for use and at a selected Vangular position with respect to the handle.

Another object of this invention is the provision of means for adjusting the angle of the `holder with respect to the handle and which closes clamping plates of the holder -to the blade when the holder is adjusted into any of the angular shaving positions and adapted to Apermit the clamped plates to open when the holder is brought into a position at right angles to the handle or in a non-shaving position for releasing the blade to permit easy and quicl; removal thereof from the holder.

A further object of Athis invention is the provision of means for permitting a coarse shave to be had `when using one edge of the blade as -positioned in the holder and to permit a close shave to be had by using the opposite or other edge of the blade, thereby providing a razor having cutting edges presentableior rst and second application o'f shaving.

With these and other objects in yiew, `this invention consists in certain novel features of construction, combinationand arrangement of parts to be hereinafter more fully described `and claimed.

For a complete Aunderstandinng of my invention, reference is to be had to the following description and accompanying drawings, in which Figure 1 is a side elevation illustrating a safety razor constructed in accordance with my invention and showing the blade holder adjusted to assume one of its angular positions with respect to the handle.

Figure 2 isa front elevation illustrating the device.

-Figure 3 is a top plan View showing the clamping plates in an open position.

Figure 4 is a fragmentary side elevation showing the clamping plates in an open position.

Figure 5 is a sectional view taken on the line 5-5 of Figure 3.

Figure 6 is a fragmentary transverse sectional view showing the blade holder assuming an angular position at one side of the handle.

Figure 7 is a View similar to Figure l6 Ishowing the .blade holder adjusted to assume `an angular 1937, Serial No. 160,687

position to the opposite side of the handle "from that shown in Figure 6.

Figure 8 is a `perspective 4View illustrating one of the rack bars.

Figure 9 is a perspective view illustrating an f adjusting plate.

Referring in detail to the drawings, the numeral I indicates a handle, 2 a blade holder pivotally connected on the handle whereby the holdermay be swung to assume various angular positions with respect to the handle o r to be positioned atright angles to the handle, as shown in Figure 5. The angular adjustment for the blade holder provides an adjustable hoe style razor whereby either of the cutting edges of a double edge blade supported by said holder may be presented for use or positioned in shaving positions, as clearly shown in Figures 6 and `'7.

The holder 2 includes a bed vplate 3 on which are formed one or more projections 4 to extend through slots or openings provided in the double edge blade 5. Opposite edges of the bed plate have formed thereon relatively spaced guard teeth 6 over which the cutting edges ofthe blade project and one group of guard teeth is p ositioned slightly farther from one cutting edge of the blade than the other group of guard teeth is positioned from the other cutting edge of the blade, the purpose `of which is `to permit a `coarse shave to be had with one cutting edge of the blade and a close shave to be had by the use oi lthe other cutting edge of the blade. Formed Von the bed plate 3 are spaced attaching plates 6 having overlapping relation with spaced ears 'l carried by the handle I. A pivot pin 8 connects the plates 6' with the ears I so that lthe blade holder may have pivotal movement with respect to the handle.

Carried by the bed plate 3 and located at the corners thereof are bearings 9. Shafts I0 are journaled in the bearings and underlie the guard fingers l6 `and have secured thereon pinions II which mesh with teeth I2 of rack bars i3. The rack bars are slidably supported in grooves formed in the underside of the Abed plate. VTeeth I4 are also formed on the rack bars which mesh with a pinion I5 journaled on a bolt i5 secured in the bed plate 3 whereby the rack bars are connected .together so that movement of one rack bar will impart movement to the other rack bar. Each rack bar I3 has formed thereon a curved arm I'I lying between the attaching plates I5.

Blade clamping plates are indicated by the character I8 and each includes arms I9 secured on the shafts I0 so that rotation lof the shafts Ill in one direction will bring about positioning of the clamping plates to overlie and clamp the blade on the bed plate with the cutting edges of the blades exposed, also the guard fingers. A rotation of the shafts I0 in an opposite direction swings the clamping plates away from the blade and to assume positions at right angles to the bed plate whereby the blade may be removed and another substituted on the bed plate in lieu thereof. The reverse rotation of the shafts l0 is brought about by reverse sliding movement of the rack bars. Mounted on the shafts l0 are coil springs 20 each having an end secured to its respective shaft and its opposite end secured to a bearing 9, the latter being fixed against movement on the blade holder. The springs act to urge the clamping plates I8 into position for clamping the blade on the bed plate 3.

A rod 2| is slidably mounted in the handle I and one end is screw threaded, as shown at 22, and the other end has secured thereto an adjusting plate 23 which operates between the attaching plates 6 of the blade holder. A iinger piece 24 is journaled on the handle and has a threaded bore 25 receiving the screw threaded end 22 of the rod 2| whereby rotation of the finger piece in opposite directions will bring about sliding movement of the rod 2| in opposite directions. The nger piece is rotatably secured on the handle by pins 26 fixed to said handle and received in an annular groove formed in the finger piece. 'I'he adjusting plate 23 has a substantially rectangular shaped opening 21 through which the pivot pin 8 extends as well as a pin 28, while leading from this opening is a lateral slot 29, being midway of the said opening and through which is passed a pin 3D. These pins 28 and Sii are secured to the connecting plates B of the blade holder and are disposed at diametrically opposite sides of the pivot pin 8. The purpose of the pin 3|) engaging in the slot 29 is to cause the blade holder 2 to swing with respect to the handle on the sliding movement of the adjusting plate. The pin 28 coacting with the pin 3&3 gives a rigidity in the relationship of the head and the handle during the working of the finger piece 24 when coacting with the rod 2|. The swing of the head constituted by the blade holder 2 is limited in either direction by Contact of the clamping plates I8 with the blade when on the holder. Lugs 32 are formed on the adjusting plate to engage with the curved arms Il of the rack bars, the purpose of which is to cause sliding movement of the rack bars relative to the blade holder for opening and closing the clamping plates i8. The sliding movement of the adjusting plate in one direction brings about swinging of the blade holder to the left of the handle, as shown in Figure 6, one of the lugs thereof contacting one of the arms acting as a check therefor and due to the swinging movement of the blade holder and the resistance offered to one of the rack bars a relative movement is brought about between the blade holder and said rack bars which swings the clamping plates into position for clamping the blade on the bed plate. An opposite sliding movement of the adjusting plate, as shown in Figure '7, swings the blade holder to the right of the handle and at the same time brings the clamping plates into clamping position to secure the blade on the bed plate by the other shoulder of the adjusting plate resisting the movement of the other arm The adjusting plate when brought to a neutral position, as shown in Figure 5, positions the blade holder at right angles to the handle and permits the clamping plates to assume open position by the action of the springs 2l] so that the blade can be removed for cleaning and wiping as well as other parts of the blade holder. The neutral position of the adjusting plate is midway between the ends of its sliding movement. Thus it will be seen that whenever the blade holder is adjusted into shaving position either as shown in Figure 6 or 7, the clamping plates are moved into clamping position automatically and when the blade holder assumes non-shaving position or at right angles to the handle the clamping plates are permitted to assume open position by the action of the springs. The angle of inclination of the blade holder with respect to the handle and the opening and closing of the clamping plates is all brought about through the rotation of the finger piece 24 thus providing a razor convenient for use and one wherein the blade can be easily removed for cleaning, sharpening or to be substituted by another blade.

What'is claimed is:

l. A safety razor comprising a bed plate adapted to have a blade positioned thereon and provided with double cutting edges, means for preventing the blade from shifting on the bed plate, guard ngers formed on said bed plate for the cutting edges, clamping plates journaled on the bed plate to assume blade clamping position or blade releasing position, spring means acting on said clamping plates to normally position the latter in non-clamping position, a handle, pivotal means between the handle and the bed plate, an operating means carried by the handle and mov- .able relative thereto, means cooperating with said operating means for swinging the bed plate to assume variable angular positions with respect to the handle, and means cooperating with the operating means for moving the clamping plates into clamping position on the bed plate assuming any of its angular positions with respect to the handle and to free said clamping plates to permit the latter to assume non-clamping position when the bed plate assumes a position at right angles to the handle.

2. A safety razor comprising a bed plate adapted to support a blade having double cutting edges, guard fingers for the cutting edges of the blade and formed on the bed plate, journals carried by the bed plate, shafts supported by said journals, arms secured to said shafts, clamping plates carried by said arms to clamp or release the blade on the bed plate, spring means acting on said shafts to normally position said clamping plates in non-clamping position, pinions secured tc said shafts, rack bars slidable on the bed plate and meshing with the pinions, means connecting said rackbars whereby movement of one will impart movement to the other, a handle, pivotal means connecting the handle to the bed plate, an operating means carried by the handle, means cooperating with the operating means for the positioning of the bed plate at right angles to the handle or in various inclined positions laterally of the longitudinal axis of the handle, and means cooperating with the operating means and the rack bars for moving the clamping plates into clamping position on 4the bed plate assuming an angular position laterally of either side of the longitudinal axis of the handle and to free the clamping plates to assume non-clamping position when the bed plate assumes a position at right angles to the handle.

3. A safety razor comprising a bed plate CII adapted to have a blade mounted thereon, guard fingers formed on said bed plate, clamping plates journaled on the bed plate to assume clamping and non-clamping position, spring means acting lto normally urge the clamping plates into nonclamping position, a handle, a pivotal connection between the handle and the bed plate, a rod slidable in said handle, means for rotating the rod in either direction, an adjusting plate secured to the rod and having a notch, a pin carried by said pivotal means and received by the notch for adjusting the bed plate into various inclined positions laterally of either side of the longitud-inal axis of the handle `or to assume a position at right angles to the handle, and means between said adjusting plate and the clamping plate to cause the latter to assume clamping position on the swinging movement of the bed plate in any of its angular positions laterally of either side of the longitudinal axis of the handle and to permit said clamping plates to assume nonclamping position on the bed plate moving into a position at right angles to the handle.

4. A safety razor comprising a bed plate adapted to have a blade mounted thereon, guard iingers formed on said bed plate, clamping plates journaled on the bed plate to assume clamping and non-clamping position, spring means acting to normally urge the clamping plates into nonclamping position, a handle, a pivotal connection between the handle and the bed plate, a rod slidable in said handle, means for rotating the rod justing the bed plate into various inclined positions laterally of either side of the longitudinal axis of the handle or to assume a position at right angles to the handle, rack bars slidable on the bed plate, means connecting the rack bars Where movement of one will impart movement to the other, means connecting the rack bars to said clamping plates, curved arms formed on the rack bars, and lugs formed on the adjusting plate for cooperation with said arms to move the clamping plates into clamping position and to free the clamping plates during the adjustment of the bed plate relative to the handle.

5. A safety razor comprising a bed plate adapted to have a blade mounted thereon, guard ngers formed on said bed plate, clamping plates journaled on the bed plate to assume clamping and non-clamping position, spring means acting to normally urge the clamping plates into nonclamping position, a handle, a pivotal connection between the handle and the bed plate, a rod slidable in said handle, means for rotating the rod in either direction, an adjusting plate secured to the rod and having a notch, a pin carried by said pivotal means and received by the notch for adjusting the bed plate into various inclined positions laterally of either side of the longitudinal axis of the handle or to assume a position at right angles to the handle, rack bars slidable on the bedplate, means connecting the rack bars where movement of one will impart movement to the other, means connecting the rack bars to said clamping plates, curved arms formed on the rack bars, lugs formed on the adjusting plate for cooperation with said arms to move the clamping plates into clamping position Iand to free the clamping plates during the adjustment of the bed plate relative to the handle, and means for limiting the sliding movement of the adjusting plate.

6. A safety razor comprising a bed plate, a handle pivoted to said bed plate, guard fingers formed on said bed plate, clamping plates journaled on said bed plate, rack bars slidable on said bed plates, means connecting the rack bars to each other, means connecting the rack bars to the clamping plates, curved arms formed on the rack bars, an operating rod slidable in said handle, an adjusting plate secured to said rod, means connecting the adjusting plate to said pivot between the handle and the bed plate, means for limiting the sliding movement of the clamping plates, lugs formed on the clamping plate to coact with the curved arms in resisting `movement of the rack bars and thereby bring about relative movement of the rack bars and bed plate during the adjustment of the bed plate relative to the handle for closing the clamping plates and to permit opening of said clamping plates, spring means normally acting to open said clamping plates, and a nger piece journaled on the handle and threaded on said rods whereby rotation thereof in opposite directions brings about sliding movement of the rod and the adjusting plate connected thereto.

GEORGE LAWSON ROBERTSON.