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parts A G G L M G C D G X-X X-X X-X Fig1 Fig1 L A2 A' A L G B M B' D C F Fig2 Fig2 B2 M C H B H J I L L I' F J I' L I J L E2 G I E' G E G I Fig3 Fig3 J K L J K E2 F L J K L J L K 1 2 3 4 Fig4 Fig4

Razor with Square Blade

PatentUS1582707

InventionSafety Razor

FiledMonday, 2nd May 1921

PublishedTuesday, 27th April 1926

InventorDavid H. Trevor

LanguageEnglish

CPC Classification:   
B26B21/20
  • B26B21/20
    Safety razors with one or more blades arranged transversely to the handle involving blades with more than two cutting edges; involving disc blades
  • B
    Performing Operations; Transporting
  • B26
    Hand Cutting Tools; Cutting; Severing
  • B26B
    Hand-Held Cutting Tools Not Otherwise Provided For
  • B26B21/00
    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
  • B26B21/08
    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
  • B26B21/14
    Safety razors with one or more blades arranged transversely to the handle
  • Y
    General Tagging Of New Technological Developments; General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc; Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [Xracs] And Digests
  • Y10
    Technical Subjects Covered By Former Uspc
  • Y10S
    Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [Xracs] And Digests
  • Y10S76/00
    Metal tools and implements, making
  • Y10S76/08
    Razor blade manufacturing

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A PDF version of the original patent can be found here.

Patented Apr. 27, 1926. 1,582,707
United States Patent Office.

David H. Trevor, of Newark, New Jersey. Safety Razor Application filed May 2, 1921.Serial No. 466,020. Renewed September 28, 1925.

To all whom it may concern:

Be it known that David H. Trevor, citizen of the United States, and resident of Newark, county of Essex, and State of New Jersey, has invented certain new and useful Improvements in Safety Razors, of which the following is a specification.

My invention relates to safety razors and the object of my invention is to provide a razor that embodies four cutting edges formed on a single plate and means for identifying the respective cutting edges or blades.

A further object is to provide means to hold the blades in proper relation to the holder.

Referring to the drawings which form a part of this specification.

Fig. 1 is a perspective view of a razor construction embodying my invention;

Fig. 2 is a sectional view taken on line X—X of Fig. 1;

Fig. 3 is a perspective view of the top plate razor plate and guard plate of the razor.

Figure 4 is an elevation of the blade.

A indicates a handle having a threaded socket A′ formed in one end thereof and provided with a flat annular surface A2. B indicates a screw which engages the thread in the socket A′ and is formed with a shank B′ of smaller diameter than that of the threaded portion thus providing a shoulder B2 against which the guard plate E is held by a screw D which extends through the central opening E′ therein. A similar opening E2 is formed in the razor plate F so that the screw B may hold all three plates together on the handle.

The top plate C and guard plate E are formed in the shape of a rectangular pyramid, the outer edges G—G—G—G respectively of which are disposed on a common plane. They are formed by a die and pressed from thin sheet metal and are rendered stiff and unyielding by the operation of pressing and, are consequently adapted to maintain their shape when finished.

The top plate is provided with pins H—H respectively which pass through holes I—I respectively formed in the razor plate F and guard plate G to hold them in proper relative position.

The razor plate F is flexible and is slotted as indicated at J—J—J—J respectively to permit the blades K—K—K—K to bend and conform to the surface of the guard-plate as will be readily understood and the razor plate is provided with two additional holes I′—I′ respectively so that all four cutting edges L—L—L—L respectively may be brought successively opposite any side of the guard plate and the respective numbers 123 or 4 thereon brought opposite the opening M in the top plate so that the user may know which blade is to be used for the next shave, etc.

It will be observed that all the plates may be easily separated for cleaning and a new razor plate inserted when desired.

Having thus described my invention, I claim as new and desire to secure by Letters Patent :—

1. A safety razor comprising a handle, a blade member having a plurality of cutting edges, identifying numbers on the blade adjacent each edge thereof, a guard plate and a cap plate having an opening through which one of said numbers may be seen and means for clamping said blade member between said plates.

2. A safety razor comprising a handle, a blade having a plurality of cutting edges, identifying numbers on the blade adjacent each edge thereof, the blade having a hole adjacent each number, a guard plate having two openings therein and a cap plate having two projecting pins adapted to extend through the openings in the guard plate and two of the holes in the blade, said cap plate having an opening adapted to register with one of the numbers whereby the number may be seen.

Signed at the city of New York, in the county of New York and State of New York, this 30th day of April, 1921.

David H. Trevor.