FiledTuesday, 29th November 1932
PublishedTuesday, 21st July 1936
InventorOctavius Victor Rodrigues
OwnerMagazine Repeating Razor Company
A patent for a new type of razor guard. I'm not aware of a razor that was made with this type of guard.CPC Classification:
Safety razors with one or more blades arranged transversely to the handle involving blades with only one cutting edge
Performing Operations; Transporting
Hand Cutting Tools; Cutting; Severing
Hand-Held Cutting Tools Not Otherwise Provided For
Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor involving changeable blades
Safety razors with one or more blades arranged transversely to the handle
Parts not referenced in the text: None
Parts not referenced in the images: None
Renewed October 29, 1935
This invention relates to an improved safety razor and is directed to an improved form of guard and its relation to the shaving head of the blade.
The object of the invention is to construct a guard that causes a formation of the skin surface which presents the hair squarely to the cutting edge of the blade. The skin is deformed by the pressure plus the movement of the guard across the skin to an extent that causes a reformation of the skin at the point where the blade contacts with the skin.
Another feature of the invention is the provision of a guard with a certain degree of drag or friction which causes the proper passage or what might be termed “flow” of skin from the guard to the cutting edge of the blade.
A razor made according to my invention has been used and a comfortable and close shave has been secured without stretching the skin by any means in advance or in rear of the razor itself.
Safety razors as heretofore made have provided a guard for the sole purpose of preventing cutting of the skin if the razor is used with care. The surface of the guard in the former razors, where it engages the skin, has been a smooth circular bar or set of curved teeth with which a close shave could only be secured by stretching the skin so as to bring the shafts of hair out of the skin. The stretching of the skin was accomplished by either using the hand not engaged in holding the razor or by facial contortions. This general stretching of the skin leaves little or no resiliency to the portion of the skin as it approaches the blade so that the taut skin is easily abraded and the hair cut through jaggedly.
The present invention is a new departure from the old form of safety razor in that the razor guard itself presents the section of the skin being shaved to the blade edge with the shaft of the hair extending out of the skin as far as it will go when the edge of the blade sliding over the lather lubricated skin comes in contact with the hair. In other words the action of the bar may be likened to taking the portion of the skin immediately ahead of the blade edge between the fingers and gently but firmly pressing it into a slightly convex form naturally projecting the shaft of the hair out of the cuticle as far as its roots will permit.
The invention is illustrated in the accompanying drawing In which
The razor selected for illustrating my invention is of the type that supports a blade flat on a blade platform
The blade may be secured on the blade platform
The improved guard is shown at
The guard bar has a leading surface
The guard has the surface which engages the skin so marked as to retard the progress of skin over the leading surface and causes a slight accumulation of skin ahead of it releasing a uniformly curved inflow of skin between the guard and the blade edge as the guard is passed over the face. This is not a stretching but a delayed release of the skin. One form of such roughening is shown by the sinuous lines or small grooves
Still another modification is shown in
While a toothed guard may be used instead of a bar in which case the form and proportions described above would apply to the teeth assuming a corrected line to average the change in line caused by the depression of the individual teeth. The bar is preferred as the release of skin is uniform all the way across the width of the guard. The roughening of the surface of the guard or the use of suction pulling material is desirable as it simulates the feeling of the finger, the leading surface of the guard making it unnecessary and even undesirable to stretch a large area of skin either in advance or in rear of the razor, the stretching and releasing being confined to the immediate area between the guard and blade edge which area is to be shaved.
The razor performs best and most comfortably after the face has been lathered by simply passing it over the skin without any stretching thus giving a close and uniformly comfortable shave without abrasion, using only the hand that propels the razor.
The parts are so arranged that the flow of skin across the guard and from its release point on the guard, which is the point of deformation of the skin, to the edge of the blade is in a path to present the hair squarely to the cutting edge of the blade.
This Invention is applicable to various forms of razors but I have Illustrated it applied to a razor using a flat blade on a flat blade platform.
1. In a safety razor, a guard having a skin-engaging surface formed of a leading surface and a trailing surface, the latter surface having a relatively small radius, the said skin-engaging surface being slightly roughened to pull slightly on the skin when the razor is passed across the skin, the trailing surface being disposed so that it compensates for excess pressure of the guard on the skin.
2. A safety razor comprising a means for holding a blade, a sharpened blade in said means, a guard in advance of and below the blade edge and having a curved skin-engaging surface, the leading part of said surface having a radius approximately equal to the distance between the blade edge and the point of said surface tangent to a line passing across the blade edge, the skin engaging surface having a curved trailing surface with a radius much smaller than the radius of the leading surface and tangent to said line.
Octavtus Victor Rodrigues.