US1817966A

US1817966A - Safety razor

Info

Publication number: US1817966A
Application number: US462267A
Authority: US
Inventors: Jacques G Coleman
Original assignee: Gillette Safety Razor Co
Current assignee: Gillette Co LLC
Priority date: 1930-06-19
Filing date: 1930-06-19
Publication date: 1931-08-11
Anticipated expiration: 1948-08-11

Description

Aug. 11,

J. G. COLEMAN SAFETY RAZOR Filed June 19. 1930 Qrr- 51 INVENTOR BY C 5: ATTORNEY Patented Aug. ll, @3531 stares innate J'AGQ'UES G. COLEMAN, WOODMERE, HEW 5203K, ASSI GN OB, BY ASSIGWKENTS,

TO GILLETTE SAFETY RAZQB CSIdlANi', E BOSTON, MASSACHUSETTS, A CQRPQEA- Lennon.

Application and time 19,

The present invention relates to that class of safety razors in which two clamping members, a guard member and a blade backing member, are provided, and a thin Q flexible blade is clamped between the guard and backing members to retain the cutting edges of the blade in shaving relation to the giiard teeth. The invention pertains more particularly to that type of the above- El mentioned class of safety razors wherein the blade backing member is hinged or pivoted to the guard member.

The main object of the present invention is to generally simplify the construction of razors or" the type above referred to, and to so design the blade backing element its swinging into blade clamping position centers the blade on the guard member, thereby automatically bringing. the positioning 29 stud receiving apertures in the blade into registry with the said studs as the latter are being moved toward the blade.

Another object or" the invention is to provide a safety razor of the type above re- 25 ferred to, wherein the blade backing element is made of two sections, which are hinged to the guard member and are com.- bined with means for shifting the same toward and for maintaining them in blade 39 clamping position.

A fur her objected the invention produce blade for co ogceration is zor or a,

With which T of the int" same consists in construction of parts herein? pointed out the 1 1 m 1 i ii ustr ateo oninan ing is be accomiesa. Serial at; 462,267.

Fi ure l is an end View, partly in section,

of a razor constructed in accordance with the present invention; Fig. 2 is. a section taken on line '2-2 of Fig. 1; Fig. 3 is a top plan-view of the improved razor; Fig. iis a top plan View of the guard member of the construction; Fig. 5 is a top plan View of one oi the blade backing member sections; Fig. 6 is a plan View of the improved blade; Fi '3' is a fragmentary per- SQQCiDiVG View of the blade and the means for shifting and maintaining the blade backing elements in blade clamping positicn; and Fig. 8 is a section taken on line 8-8 oi Fig. 3 with the blade backing elements and their shifting means in other positions.

the drawings the numeral 10 indicates a guard member, provided with suitable guard teeth 11 in its opposite longitudinal edges. From the underi ace of this guard member extends centrally a tubular handle 12,- the bore of which is in alignment with a central hole 13 in said guard member. in its longitudinal axis, the said guard member is provided on each side of central hole 13 with an opening The openings 1d are equidistantly spaced from the hole 13. To the guard inem. er

attached by pivots 15 two blade baclring elements 16, each blade backing element be g associated with two registering pivots which extend in parallel relation to the longitndinal axis or the guard member and are disposed on the transverse edges of the latter adjacent the longitudinal edges thereof. The blade hacking sections are thus pivoted adjacent their outer longitudinal edges, heir inner longitudinal edges meeting in the longitudinal center line of the guard member when in blade clamping position (Figs. 1 and Each of the blade baclring sections is provided adjacent longitudinal edge with two down nro ecti g lugs J, throug which Lid underface of the latter two positioning studs 19, the studs on one of said elements being, transversely of the guard member, in alignment with those on the other and being adapted to be extended through the guard openings 14 without contacting with the edges of the latter. Each oi. the blade backing sections is provided centrally in its free longitudinal edge with a notch 20, said notches being in alignment with one another and with the hole 13 in the guard member when the said blade backing sections are in their blade clamping positions, shown in Figs. 1 to 3, inclusive, of the drawings. With each notch 20 are associated in the upper face of the respective blade backing sections recesses 21, adapted to receive the head 22 of a spindle 23, which extends slidably through the handle l2. @n this spindle is rotatably mounted a knurled sleeve 24-, which is oscillatahle upon the lower? or free end of said handle, the connection between the said elements being made by two pins 25, which are fixed upon diametrically opposite portions of the lower end of the handle 12 and'provided with heads 26, the latter projecting beyond the outer face of the handle and being seated in cam slots 27 in the said sleeve. As appears from Fig. l of the drawings, the central hole 13 in the guard member is of non-circular configurw tion. That portion of the spindle 23 which extends through the said hole has a corre sponding cross-section, so that rotation of the spindle on the guard is prevented. The spindle is provided within the handle 12 with a shoulder 28. Against this shoulder and the pins bears a helical spring 29, which is coiled about the said spindle and has a tendency to lock the spindle .23 in its inner and outer positions, hereinafter to be described.

The blade 30, to be mounted upon the 12 Z02 above described, is of the thin flexible type, having two cutting edges 31, and is provided with an aperture 32 which is in the form of a central longitudinal slot. This slot is provided with a central transverse enlargement 33, through which the head 22 of the spindle 23 is adapted to pass. This enlargement is, when the blade is mounted upon the razor, in alignment with the cen tral hole 13. The blade slot is furthermore provided on either side of the said central enlargement with. a transverse enlargement the last-iiicntioned enlargements being )1' disposed ad acent the ends or the slot and adapted to take each two rcgiing beingpositioning studs of the two bladc baclzing clement sectio s. The last-mentioned cularpruwuts a. 1 adapted to receive c .'lii1 lricul {HF} (lillcilc tvpc of XlGl he blacc.

The blade blade 15 in each cornei or t e estates provided a cut-away portion 35, into which the lug 17 on a blade backing member section is adapted to enter.

When the blade is to be mounted upon the razor, assuming that the razor elements are in the positions indicated in Figs. 1 to 3, inclusive, of the drawings, the sleeve Ql is turned in the proper direction on the tuba la r handle 12 whereby the spindle 23 is raised to the position shown in Fig. 8 of the drawings. -The backing element sections are then swung around their pivots into the positions shown in dotted lines in Fig. 8 of the drawings, the razor being then adapted to receive a blade. The blade is mounted upon the razor by extending the head 22 of the spindle 23 through the central transverse enlargement 33 of the blade slot, the blade being placed upon the guard member of the device. That portion of the spindle which 'co-operatcs with the central transverse enlargement 33 of the blade slot has a trans verse cross-sectionto cause the blade to assume a substantially central position on the guard member. The said blade, however, is not brought into shaving position on the guard member due to the fact that in the mass production of razor blades fractional allowances for the variations to the standard dimensions must be ma'de,'and also the blade could not be properly flexed if the transverse enlargement of this slot would fit exactly V the transverse cross-section of the spindle. Consequently, the blade must be centered upon the guard member to bring it into shaving relation to the guard teeth and also to receive the positioning lugs on the blade backing element sections. This centering of the blade is etl'ccted automatically by shifting the blade backing element sections from the positions shown in dotted lines in Fig. 8 of the drawings into the position shown in full lines therein.

As the said blade backing element sections are shifted in the directions of the arrows shown in Fig. 8, their cam faces 18 engage the blade at the edges 36 of the cutaway portions and thereby bring its cutting edges into shaving relation to the guard teeth and also placing the transverse enlargements 34 of the blade slot into the exact positions in which they are adapted to receive the positioning studs 19. The said cam. faces are so shaped that, before the spindle head 22 is seated in the recesses 21 in the outer faces of the backing clement sections and imn lately after the positioning studs have .ed the transverse culargt *nts 31' blade slot. the mm faces are discngr from the cdg ll} oi" the cut-away poikoi 351d the blade, so that, in the further downward movementof the positioning s uds, the latter keep the blade in sharing tion on. the guard. is: the spindle is moved downwards, it causes Ill? lib.

,, which is underthe action of-the spring 29, malntaining the blade backing element sections and the blade in shaving position on the guard mcmbcr.- he blade is, obviously, flexed inrthe ordinarym'anner while it is being clamped between the guard member and the backing element. In order to remove the blade, the operations abovedescrlbcd are 7 performed in the reverse order.

'lVhat I claim is 1. A safety razor, comprising a guard mcmbena handle thereon, two blade backing elements pivotally mounted upon said guard member to meet in the longitudinal center line of the latter, a blade adapted to be clamped between said guard member and said blade backing elements,*said blade having positioning stud receiving apertures, two positioning studs adjacent the free longitudinal edge of each of said blade backing elements adapted to enter said blade apertures, and means mountedo'n saidhau dle for locking said blade backing elements in blade clamping position.

2. A safety razor comprising a guard member, atubular handle thereon, two blade backing elements pivotally' mounted upon said guard member to meet inthe longitudinal center line of the latter, a blade adapted to be clamped between said guardmember and said blade backing elements, said blade having positioning stud receiving apertures, two positioning, studs adjacent the free longitudinal edge of each of said blade backing elements adapted to enter said apertures, and means extending through said handle for locking said blade backing elements in blade clamping position, said blade having an aperture through which said last-mentioned means is adapted to pass.

3. A safety razor according to claim 1, comprising means on said blade backing elements for centering said blade onsaid guard member before said positioning studs enter said apertures.

i. A safety razor according to claim 2, comprising means on said blade backing elements for centering said blade on said guard member before said positioning studs enter said positioning stud receivingapertures. V

5. in a safety razor according to claim 1, comprising means on said blade backing elements for centering said blade on said guard member before said positioning studs enter said apertures, said centering means being disengaged from said blade after said positioning studs have entered said apertures.

6. A safety razor according to claim 2, comprising means on said blade backing elements for cente'ringsaid blade on said guard member before said positioning studs enter said"po sitioning stud receiving apertures, said centering means being disengaged from said blade after said positioning studs have. entered said apertures.

7. A safety razor comprising a guard member, a handle thereon, two blade backing elements pivotally mounted upon said guard member to meet in the longitudinal center line of the latter, a blade adapted to be clamped between said guard member and said blade backing elements, said blade having positioning stud receivin apertures and a cut-out portion in each'ot its corners, two positioning studs adjacent the tree longitudinal edge of each of said blade backing elements adapted to enter said blade apertures, n1eans mounted on said handle for locking said blade backing elements in blade clamping positions, and lugs on said blade backing elements adapted to enter the cut-out portions of said blade, said lugs having cam faces for co-operation with the blade to center the latter on said guard member prior to the entry of said positioning studs into said apertures.

8. in a safety razor according to claim 7, said cam faces being shaped to release said blade as soon as said positioning studs commence their positioning operation.

9. A safety razor comprising a guard member, a handle thereon, two blade backing elements pivotally mounted upon said guard member to meet in the longitudinal center line of the latter, a blade adapted to be clamped between said guard member and said blade backing elements, said blade having positioning stud receiving apertures, two positioning studs adjacent the free longitudinal edge of each of said blade backing elements adapted to enter said blade apertures, means mounted on said handle for maintaining said blade backing elements in blade clamping positions, and lugs on said blade clamping elements having cam faces for co-operation with the blade to center the latter on said guard member prior to the entry of said positioning studs into said apertures.

10. in a safety razor according to claim 9, said cam'taces being shaped to release said blade as soon as said positioning studs commence their positioning operation.

11. A safety razor comprising a guard member, a handle thereon, two blade backing elements pivotally mounted upon said guard member to meet in one of the center lines of the latter, a blade adapted to be clamped between said guard member and said blade backing elements, said blade having positioning stud receivin apertures, po-

sitioning studs on said blac e backing elements adapted to enter said blade apertures, and means mounted on said handle for mainclamping position,

15 me d y of a 12. A safety 1 2mm" eceerc'ting "50 eisim 11 comprising means 0111 said blade backing e lements for centering said blade on saicl guard member before said pesisioning studis enter said apertures. A

13. A safety mzer according t0 claim 11 comprising means on said blade backing" elements for-centering said Made on said guard member before ssicl pesitiening semis enter said apertures, said centering means being disengaged from said blade seid pa sitioning studs have entered semi apertures.

Signed at New Y 0T1: Ciel the eeumzy of New York ef New 1 0E13 this emme