Invention Injector Razor
Filed Wednesday, 12th September 1951
Published Tuesday, 19th January 1954
Inventor Charles E. Butlin
Owner American Safety Razor Corporation
Language EnglishCPC Classification:
Safety razors with one or more blades arranged transversely to the handle of the magazine type; of the injector type
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
For a full resolution version of the images click here
A PDF version of the original patent can be found here.
Parts not referenced in the text: None
Parts not referenced in the images: None
This invention relates to injector razors and has for its object to improve and simplify the construction of such razors. The injector razor in common use today comprises a back plate terminating in a forwardly extending blade-clamping cap, and a blade platform and guard on a cam plate depending from the rear edge of the platform, articulated to the back plate and held with the blade platform in contact with the cap and back plate by means of a spring, the whole being mounted on a handle. Blades are fed to such a razor from an injector magazine which is provided with a forwardly extending cam finger designed to be inserted between the cam plate and the back plate and, by separating the two, to release the clamping pressure upon the blade on the platform, whereupon the topmost blade of a stack of sharp blades in the magazine is fed forward between the cap and the platform, discharging the dull blade as the sharp one moves into shaving position.
In the common injector razor the cam plate is articulated to the back plate by means of a tongue struck up from the latter and extending forward through an opening in the cam plate. Two additional tongues are bent forward from the back plate to form stops or supports for the lower edge of the cam plate. The S spring which presses the cam plate backward and upward so that the blade platform is held against the cap and back plate, is riveted to the back plate near its lower end. The upper end of the spring is bifurcated to engage a tongue struck from the blade platform and extending downward. The back plate extends downward below the rivet and into a ferrule to which it is permanently attached, and the ferrule is fixed upon the upper end of the handle.
In accordance with the present invention I eliminate the three tongues which support the lower edge of the cam plate and articulate it to the back plate, and hold the blade platform and its depending cam plate in position by means of the spring alone. This spring is shaped like a question mark. Its curved, upper end is provided with a tongue which enters a slot at the intersection of the blade platform and the cam plate, and its straight, lower, depending end is provided with a shoulder pressed out just below the curve to allow for play of the cam plate while holding it in place. The back plate is provided with a lower depending end of the same size and shape as that of the spring and the two are held together in juxtaposition during assembly by a button pressed up from the depending end of the back plate and fitted within a corresponding hole in the depending end of the spring.
After the cap, blade platform, and spring, constituting the head of the razor, have been assembled as just described, they are mounted within a slot in the upper end of the handle, the juxtaposed lower ends of the back plate and spring making frictional engagement with the sides of the slot. The upper, slotted end of the handle is encased within a metal ferrule the outer end of which is suitably slotted to receive the head of the razor.
In the accompanying drawings I have illustrated a preferred embodiment of my invention. In these drawings
The injector razor illustrated in these drawings comprises a handle
The upper end of the handle
The razor just described is assembled as follows: The blade platform
The injector razor just described operates in general like any injector razor. When it is desired to remove a dull blade and insert a sharp one the cam finger
It will be noted that the blade platform
1. An injector razor comprising a blade platform, a cam plate depending from the platform, a blade-clamping cap overlying the platform, a back plate depending from the cap, a spring pressing backwardly and upwardly at the intersection of the blade platform and its cam plate, a tongue on the upper end of the spring, an aperture at the intersection of the blade platform and the cam plate into which the tongue extends, a depending extension on the spring, an outwardly projecting shoulder on the extension below the lower edge of the cam plate, a depending extension on the back plate in juxtaposition with that on the spring, and a handle having a slot within which the depending juxtaposed extensions on the spring and back plate are frictionally held.
2. An injector razor comprising a blade platform, a cam plate depending from the rear edge of the platform, a blade-clamping cap overlying the platform, a back plate depending from the the
Charles E. Butlin.
References Cited in the file of this patent
UNITED STATES PATENTS