US2787829A

US2787829A - Safety razors

Info

Publication number: US2787829A
Application number: US460813A
Authority: US
Inventors: Thomas W Bayne
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-10-07
Filing date: 1954-10-07
Publication date: 1957-04-09
Anticipated expiration: 1974-04-09

Description

T. W. BAYNE Aprl 9, 1957 SAFETY RAZORS v 2 Sheets-Sheet Filed Oct. 7, 1954 m a \S N) E w II IllII I I I Il T. W. BAYN E SAFETY RAZORS April 9, 1957 2 Sheets-Shet 2 Filed Oct. 7, 1954 United States Patent- SAFETY RAZORS Thomas W. Bayne, A'cola, Saskatclewan, Canada Application October 7, 1954, Serial No. %0,813

4 Claims. (Cl. 30-43) The inventon relates to electric razors and an object of the invention is to provide a head unit for an electric razor having a large cutting area and wherein provision is made for maintaining the movng parts well lubricated and for effectively cutting both long and short hairs.

A further object is to provide a razor head unit having relatively few parts, all of which can be produced and assembled at low cost and which can be readily demounted for inspection, cleaning and other purposes, as required.

A more detailed object is to provide a head unit wherein the head plate is of a spread, inverted U-shape having transverse rows of closely spaced, narrow slots formed therein, the end slots of the rows extending down- Wardly into the side fianges of the plate and wherein the cutter nounted for reciprocation within the plate is supplied with spaced transverse cutting blades adapted in the reciprocation of the cutter to sweep across the rows of slots in the head plate.

A further detailed object is to supply a base block secured to the side flanges of the head plate and which block is provided with spring pressed ball bearings on which the base of the cutter rides and which bearings also serve to press the cutter contintously into close contact with the head plate.

A further object is to provide the blades of the cutter with oil pockets throughout their length and which pockets drain to lengthwise channels provided in the lower part of the cutter sides and all of which serve to keep the cutter well lubricated at all times.

A further object is to supply the base block with a central slot to admit a lever for cutter reciprocating purposes and with end channels to receive clips supplied by a casing for mounting the unit.

With the above more important and other minor objects in View, which will become more apparent as the description proceeds, the invention consists essentially in the arrangement and Construction of parts hereinafter described, reference being had to the accompanying drawngs, in which:

Fig. 1 is an enlarged vertical sectional View, centrally and longitudinally through the unit.

Fig. 2 is an eniarged vertical sectional View, centrally and transversely through the unit.

Fig. 3 is a perspective view showing a portion of one end of the head plate and the contained part of the base block.

Fig. 4 is a perspective View of one end of the base block.

Fig. 5 is a perspectve view of one end of the cutter.

Fig. 6 is an enlarged perspective view showing the oil pockets formed in the blades of the cutter.

Fig. 7 is an enlarged vertical sectional view through a portion of the base block and showing one of the tapered holes theren together with the ball hearing and spring within the hole.

Fig. 8 is a plan view of one end of the casing and showing the location of the spring clips.

ICC

Fig. 9 is an enlarged perspective view of a portion of the head plate and showing the slots therein and particularly the end slots of the rows.

In the drawings like characters of reference indicate corresponding parts in the several figures.

The razor unit comprises three major parts, a head plate A, a base block B and a reciprocatng cutter C.

The head plate is of a spread, inverted U -shape presenting a curved, face engaging, body portion 1 and downwardly extending,

opposing side flanges

2 and 3. The body portion is formed with a plurality of similar, spaced, transverse rows of narrow slots 4 and it will be observed that the end slots of the rows, specifically indicated at 4', extend well down into the flanges (see Figs 3 and 9) for a purpose later apparent.

Between the lower edges of the

fianges

2 and 3, I insert the base block B which is of the same length as the head plate and is secured thereto in any suitable manner such as by

cross rods

6 and 7 in the form of elongated rivets. The ends of the base block are supplied with similar cross channels S for a purpose later disclosed. Adjacent each end, the base block is also provided with a pair of similar, spaced, tapered holes B' the upper contracted end of each of which retains an inserted ball hearing 9 pressed upwardly by an underlying coil spring 10, the lower end of which is seated on suitable lugs ii formed at the lower end of the hole. The upper surface of the ball hearing projects beyond the hole as shown.

Within the area between the attached head plate and base block I locate the open centered cutter C. The cutter is for the greater part shaped complementary to the head plate, but of less length, so that it can be reciprocated :herein without becoming projected beyond the ends thereof. 'The base part 12 of the cutter continuously rides the ball bearings and it carries a plurality of similar, spaced, upstanding, transverse cutting blades 13, the outer faces, of all of which, are in slidng contact with the inner face of the head plate. Actually the spring pressed ball bearings hold the cutting blades under continued pressure against the transversely slotted upper part of the head plate. The cutting blades are narrow and closely spaced and slidingly contact not only the upper part of the head plate but have their down going ends 13 immediately within the side flanges of the head plate, so that their cutting edges 13' and 13 sweep across all slots formed in the head plate.

The outer surfaces of the blades are all formed with oil pockets 14 (see Fig. 6) and the lowermost oil pockets open to side channels 15 provided in the sides of the cutter.

The base block is supplied with a central slot 16 and immediately above it, the base 12 of the cutter is provided with a narrow slot 17, such slots receiving a pivoted finger or lever 18 mounted on a pivot pin 19. The finger or lever is reciprocated to actuate the cutter.

When the several formed parts are assembled, they form a razor head unit for mounting in the upper end of a casing 20 and which is herein shown as supplied with fastening means comprising pairs of depressible springs 21 provided with tits 22 adapted to enter the end channels 8 of the base block and hold the unit seated in the casing. Obviously when so secured, the head plate and base block remain stationary with the casing and the cutter is free to become reciprocated by the lever 18.

It is common knowledge that casings, such as that 20, are made from mating parts shaped to Conveniently fit the hand and to house and mount internally, an electric motor utilized to reciprocate a lever, such as that 18; and aecordingly no further description of' suchis' given;

It will be--observed that-the-upper curved face of thehead plate and the co-actirg cutter, give a relatively large area for cutting short' hairs and that the down going 'end siots-'of the-plate;- together with the-e1tended co-acting' blades' of` the cutter 'p'ermitone to readilyandeffectively cut long hairs=when-sueh as desired Itw-l be also seen -that`-the cutter i's= mounted on the ball 'bearings for easy rding', that the bearings maintain-the cutterwithin and contacting the head-plate and presenting trans verse, spacedblades' adapted to sweep across the Slots of the-head plate' h*the-reciprocation of the cutter, said bI'ades of the cutter being provided with oil' pockets throughout` their lengths'.:

2. i 'Ihedevice as'claimed in claim 1 wherein the'cuttcr is' supplied with side Channels crossing the oil pockets at theends of i the blades.

3. In a razor head unit, in combination, a head plate presenting a transverse, curved body portion having downturned side flanges and provided with spaced, transverse rows of spaced slots extending across the body portion and downwardly into the flanges, and a cutter within and complementary to the head plate and presenting, spaced transverse blades adapted to be swept across the head plate slots in the reciprocation of the cutter, said blades being supplied` throughout their lengths with a series of oil pockets.

4. The deviceas" claimed in' claim 3 Wherein side channels are provided in the cutter and communicate with the end pockets of the respective blades.

References Cited in the file of this patent UNITED STATES PATENTSL 2,1983118 K'napp Apr. 23; 1940' 2,259,002 Knapp Oct. 14, 1941` 2 ,317,177 Carissimi Apr. 20; 1943-