US1350034A

US1350034A - Safety-razor

Info

Publication number: US1350034A
Application number: US269742A
Authority: US
Inventors: Parker Riley Herbert
Original assignee: Gillette Safety Razor Co
Current assignee: Gillette Co LLC
Priority date: 1919-01-06
Filing date: 1919-01-06
Publication date: 1920-08-17
Anticipated expiration: 1937-08-17

Description

R. H. PARKER.

SAFETY RAZOR. APPLICATION FI LED JANrG, 1919.

Piitented Aug. 17, 1920.

IIE HE a. III E i. A I 4 i 7 up: I m l: a

NITED STATES PATENT OFFICE.

RILEY HERBERT PARKER, OF WINTHROP, MASSACHUSETTS, ASSIGNOR TO GILLETTE- SAFETY RAZOR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF DELAWARE.

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SAFETY-RAZOTt.

Specification'of Letters Patent. Patented Aug. 17, 1920.

Application filed January 6,1919. Serial No. 269,742.

T 0 all whom it may concern:

Be it known that I, RILEY HERBERT PARKER, a citizen of the United States, residing at Winthrop, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Safety-Razors, of which the following is a specification.

My invention relates to safety razors of the type in which stops are provided for engaging the cutting edge of the blade and positioning it with respect to the guard, and resides in certain improvements hereinafter described in connection with the accompanying drawing, in which:

Figure 1 is a side elevation illustrating my razor as preferably constructed, with the parts in operative position;

Fig.2 is a similar view showing the holder opened to receive orrelease the blade;

Fig. 3 is an end View of the razor with the parts in the position illustrated in Fig. 1, and i Fig. 4 is a plan view of the end of the razor with the blade removed. I

The razor illustrated in the drawing comprises a handle 2, a head 3 secured to one end uof the handle and extendingtransversely thereto, and a guard 4 formed on the front edge of the head 3, these parts being of familiar'construction. At its rear edge the head 3 is provided with a pair of upwardlyextending portions 5 carrying at their upper ends a pmtle 6 extendingparallel with the guard, and on this pint'le is hinged the rear edge of a cap-piece 7 provided at the ends of its front or free edge with downwardlyprojecting stops 8 adapted to engage and overhang the front or cutting edge of the blade, which is shown at 9. Preferably the cap-piece is also provided near its front edge with a pair 'of lugs 10 extending downward from its ends,- the function of which is to' position the blade and cap-piece as described below. 11 indicates a stiff spring secured at one end to the head 3 and projecting upward above the latter at its free end, where it is provided with a seat 12 adapted to receive and support the rear edge of the blade 9 and located slightly above a plane drawn tangent to the guard 4 and including the pivotal axis of the cap-piece 7. T 0 insert the blade the cap-piece 7 is swung upward'to about the position shown in Fig 2, the front edge of the blade is enin the closed position shown in Fig, 1, in.

which the edge portion of the blade rests-on the top of the guard 4, the lugs 10 lie outside of the ends of the head 3 and the stops 8 occupy spaces provided therefor at the ends of the guard. During the closing movement of the cap-piece the rear edge of the blade pivots in the seat 12, and the normal or free position of the spring 11 is such that as the cutting edge of the blade moves toward the guard the seat 12 is forced backward against the resistance of the spring. In consequence; when the holder is closed the spring exerts a pressure on the rear edge of the blade whereby the latter is held against the stops 8, and since the front edge of the blade is below the dead-center position with respect to the axis of the cap-piece the spring also holds the blade in contact with the guard, thereby maintaining the parts in position for use until the holder is opened by swinging the cap-piece 7 upward: During the closing and opening movements of the cap-piece the blade is prevented from moving endwise by the lugs 10, which are located near enough to the free edge of the ca -piece to overlie the ends of the blade in al posipiece such as might result from looseness or wear at the pint In the specific construction illustrated the cap-piece 7 is so shapedthat when the holder is closed the front edge of the ca J-piece, between the stops 8, bears upon an reinforces the blade a short distance back of its cut ting edge, thus providing a backing which is advantageous in case the blade employed is so thin that such reinforcement is necessary or desirable. If the blade employed is so stiff that such a backing is not needed, the cappiece 7 may of course have any desired configuration between the stops 8.

Th advantage gained by positioning the cutting edgeof'the blade by means of stops formed on the pivoted cap-piece is that the blade can be engaged with the stops and then rear edge may be swung down upon the, guard without danger of injuringits cutting edge,"i-whereas in prior razors in which the stops are permanently located at the ends of the guard it requires considerable care to engage the "blade with the stops without dulling its cutting edge by contact with the guard. Other-ad vantageous features of my invention reside in the formation of the seat for the rear edge of the blade on the free end of the spring whereby the holder is kept closed,

and'in the provision of the cap-piece with downwardly-extending lugs so located as to prevent endwisemovement of the blade.

in all positions of the latter, as well as lateral play of the cap-piece when the holder is closed, but various other means for. positioning the blade and supporting its employed if preferred. .I claim p 1. In a safety-razor, a holder comprising a guard, a cap-piece pivotally mounted on an axis parallel withfthe guard and provided with stops adapted to engage and position the cutting edge of a blade, and means for maintaining the blade in operative position when the holder is closed.

2. In a safety razor,.a holder comprising a guard, a cap-piece pivotally mounted on an axis parallel with the guard and provided with stops adapted to engage and position the cutting edge of a blade, a seat .adapted to support the rear edge of the I a guard, a cap-piece pivotally" mounted on blade and a spring whereby the holder is maintained in closed position. Y

, 3.-In a safety razor, a holder comprising an axis parallel with the guard and provided with stopsadapted to engage and position the; cutting edge of a blade, and a spring providedwith a seat adapted to receiveand support the rear edge of the blade, said seat being located above the dead-center' position of the blade with respect to the pivotal axis of e cap-piece and arranged to press the blade against said stops when the holder is closed.

5. In a safety razor, a holder comprising a handle, a head secured thereto and provided with a guard, a cap-piece hinged to the head on' an axis parallel with the guard and provided with stops adapted to engage and position the cutting edge of a blade, downwardly-extending lugs carried'by the cap-piece near said stops and adapted to embrace the ends of the head when the holder is closed, and means for supporting the rear edge of the blade and for maintaining the holder in closed position.

6. In a safety razor, a holder comprising a handle, a head se'curedthereto and provided with a guard, a cap-piece hinged to the head on an axis parallel with the guard and provided with stops adapted to engage and position the cutting edge of a blade, and a spring fixed at one end with respect to the handle and provided at its free end with a seat adapted to receive and support the rear edge of the blade at a point above the dead-center position of the blade with respect to the pivotal axis of the cap-piece, said spring being arranged to press the blade against said stops when the holder is closed.

7. In a safety razor, a holder comprising a handle, ahead secured thereto and provided with a guard, a cap-piece hinged to the head on an axis parallel with the guard and provided with stops adapted to engage and position the cutting edge of a blade, a

spring fixed at one end and provided at its free end with a seat adapted to receive and support-the rear edge of the blade at a point above the dead-center position of the blade with respect to the pivotal axis of the cappiece, said spring being arranged to press the blade against the stops when the holder is closed, and downwardly extending lugs carried by the cap-piece near said stops and adapted to embrace the ends of the head when the holder is closed.

Signed at Boston, Mass, this fourth day of January, 1919.

RILEY HERBERT PAR-KER.