US1359031A

US1359031A - Automatic hair-cutting machine

Info

Publication number: US1359031A
Application number: US226377A
Authority: US
Inventors: Samuel M Coffman
Original assignee: BARBERS ELECTRIC SPECIALTY COM
Current assignee: BARBERS ELECTRIC SPECIALTY Co; BARBERS ELECTRIC SPECIALTY COM
Priority date: 1918-04-03
Filing date: 1918-04-03
Publication date: 1920-11-16
Anticipated expiration: 1937-11-16

Description

S. M. COFFMAN. AUTQMATIC HAIR CUTTING MACHNE.

APPLICATION FILED Ams. IaIs.

1,359,031 Patented Nov. 16, 1920.

2 SHEETS-SHEET I.

WITNESS.- 2g INI/ENTQR.' Y

Z9 30 22 fam/ZM bj/7mm,

ATTORNEY.

s. M. COFFMAN.

AuToMAncyHAm cumm; MACHINE. APPLICATION FILED APR. 3, i918.

Patented Nov. 16, 1920.

IN VEN TOR.'

WI TN ESS i5 plate provided at its rear corners SAMUEL M. COFFMAN, OF KANSAS CITY,

MISSOURI, ASSIGNOR TO THE BARBERS ELECTRIC SPECIALTY COMPANY, A CORPORATION OF KANSAS.

AUTOMATIC HAIR-CUTTING MACHINE.

Specification of Letters Patent.

Patented Nov. 16, 1920.

App1cationli1ed April 3, 1918. Serial No. 226,377.

To all whom t may concern:

e it known that I, SAMUEL M. COFFMAN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Automatic Hair-Cutting Machines, cf which the following is a specification.

My invention relates to hair cutting' machines, and one object is to provide a new and useful. power driven device of this character which will enable barbers to cut hair more expeditiously and with less fatigue' than is possible with the handactuated cutters nowV in general use.

A further object is to provide a device of this character in which the cutter blades are capable of moving pivotally independently of the handle of the device, to the end that said blades can be readily adjusted to different angles and thus relieve the operator of the necessity of twisting his hand or wrist in uncomfortable positions while cutting hair with the device.

Another object is to provide a hair cutting machine which can be used equally :as well with the right or left hand.

Other objects of the invention will hereinafter appear, and in order that said invention may be fully understood, reference will now be made to the accompanying drawings, in which:

Figure 1 is a side elevation of the device.

ig. 2 is a plan view of the device.

Fig. 3 is an irregular vertical section on line III-III of Fig. 4.

Fig. 4 is a longitudinal section on line IV-IV of Fig. 2.

Fig. 5 is a vertical of Fig. l.

Fig. 6 is a cross section on line V I V I of Fig. 4.

Fig. 7 is an irregular section on line VII- VII of Figi 4. Y

In carrying out the invention, I employ a main member provided at its forward end with a head 3, and having a rearwardlyextending, tubular portion 5 provided with a handle 6, removably-held in place by a set screw 8.

The lower portion, of the head 3 terminates in a yoke 10 to which a blade holder 12 is operably connected by pivots 13. Said blade holder 12 consists of a rectangulalr witi section on line V-V nut 27 and the blade holder 12 thumb seats 15, whereby it may be rocked on the pivots 13 against the action of a retractile spring 16, which normally holds the plate against the lower end of a set screw 18 threaded through one of the arms of the yoke 10. The spring 16 is attached at its upper end to the set screw 18, and at its lower end to the blade holder 12 through the intermediacy of a screw 20.

The blade holder 12 is provided at its under forward side with a pair of oppositely-disposed dowel pins 22, which extend downwardly through the upper and

lower cutter blades

23 and 24, respectively, and coact with a screw 26 and a thumb nut 27 in securing said cutter blades to the blade holder 12. The dowel pins 22 extend through slots 29 in the upper reciprocatory blade 23 and through a snugly fitting hole 30 in the lower stationary blade 24.

The screw 26 has an angular head 32 countersunk in the central portion of the stationary blade 24, to keep from rotating in said blade when the thumb nut 27 is rotated. A spring washer 34 fitting over the screw 26, is interposed between the thumb to prevent said nut from becoming loose accidentally when tightened'to firmly hold the rear end of the stationary blade 24 firmly in engagement with a lug 35 at the rear central portion of the blade holder 12.

Reciprocatory motion is imparted to the upper blade 23 by a pitman 37, the lower end of which extends through a slot 39 in the blade holder 12, and an opening 40 in the reciprocatory blade 23. As disclosed by Fig. 4, the front and rear walls of the slot 39 are beveled downwardly andbackwardly to permit said blade holder 12 to be tipped to the dotted position without interfering with the oscillatory motion of the pitman 37.

The pitman 37 is provided at its upper end with a rearwardly-extending spindle 42, rockably-mounted in an eccentric bearing 44 adjustably mounted in the upper end of the head 3 to adjust the pitman laterally for the purpose of bringing the reciprocatory blade 23 into proper relation with the stationary blade 24. After the eccentric bearing 44 has been adjusted axially in the head 3 to eifect lateral adjustment of the pitman 37, said bearing is firmly locked in position by a set screw 45, threaded in the top of the head 3 and extending into an annular groove 47 in the forward portion of the eccentric bearing 44. The pitman spindle 42 is operably-retained in the eccentric bearing 44 by a retaining screw 49 threaded into the rear portion of said eccentric bearing 44 and projecting into a peripheral groove 50 in the spindle 42.

Oscillatory motion is imparted to the pitman 37 by a drive shaft 52 having an eccentric forward end 54 upon which an antifriction roller 55 is mounted. Said antifriction roller 55 fits within an elongated cavity 57 in the rear side of the pitman 37 and alternately engages opposite sides of said cavity 57 to actuate the pitman when the drive shaft 52 is in operation.

The rear end of the drive shaft 52 is provided with a fiXedly-inounted worm wheel 58 driven by a worm 59. The

worm gears

58 and 59 are arranged in a housing 61, containing a lubricant chamber `62 to hold a suitable lubricant for saidy worm gears and their bearings. The housing 61 is provided at its forward side with a tubular member 64, which in connection with the forward portion of the main member 1, constitutes bearings for the drive shaft 52. The tubular member 64 snugly lits within the tubular portion 5 of the main member 1, but is capable of rotating therein to allow free 9peration of the

worm gears

58, 59 and a flexible drive shaft 87 irrespective of any axial motion which may be imparted to the main member 1 and-the parts carried thereb yA peripheral groove 65 is formed at the inner end of the tubular member 64 to receive the set screw 8, whereby said tubular member 64 is operably retained within the tubular portion 5.

Access is had to the interior of the housing 61 through an opening in the rear side thereof, which is normally closed by a plate 66 removably-held in position by screws 67. Said plate 66 also serves as a thrust-,bearing for the rear end disclosed more clearly by Fig. 4. ln addition to the tubular member 64, the housing 61 has a tubular extension 70, projecting at right angles to the tubular member 64 and f 72 for the tubular provided` with a bearing 59, which 1s projournal v73 of the worm vided at its opposite end with a journal 74 mounted in a bushing 75 held in one end of the tubular member by a set screw 78, fitting within a peripheral groove 79 in said bushing. Longitudinal movement of the wom 59 is overcome by thrust-collars 81 yand 82 abutting the adjacent ends of the bea-ing 72 and the bushing 75, respectively.

The tubular journal 73 has a longitudinal slot 84. to receive a feather 86 on the end of the shift 87, which is pointed to readily enter said tubular `journal 73, to drive the same. Entrance of the end of the shaft 87 of the drive shaft 52, as

is further facilitated by the bearing 72, one end of which extends beyond the end of the journal 73 and is rounded to guide the end of the shaft 87 into said journal 73.

The shaft 87 is ilerrible throughout the greater portion of its length and adapted to be driven by an electric or other motor, not shown. lt extends through a flexible housing 90 provided at one end with a sleeve 91, having a spring 92 secured thereto and provided with a shoulder 93 to enter a groove 94 in the extension 70 and hold the end of the shaft 87 in the journal 73. On depressing the curved portion 96 of said spring 92, the shoulder 93 is disengaged from the walls of the groove 94, whereupon the shaft 87 can be disconnected from the journal 73.

ln practice the blade holder 12 is set at the proper angle relative to the handle 6, through the intermediary of the set screw 18. Further adjustment is then readily had as needed by pressing down upon one of the thumb pieces 15, which may be accomplished without relinquishing the grasp upon the handle 6. As the worm 59 is driven it drives the worm wheel 58 which rotates the drive shaft 52 and causes it, through the intermediacy of its eccentric terminal 54 and the antifriction roller 55, to operate the pitman 37, which in turn oscillates the upper plade 23.

he stroke of the pitman 37 is sullcient to cause the cutting edges of the blade 23 to pass back and forth over the cutting edges of the stationary blade 24, but should the bla-des wear or get out of adjustment with each other and prevent the cutting edges of the blade 23 from crossing the cutting edges of the bla-de 24 in both directions, the upper blade 23 can be adjusted longitudinally into proper relation with the'lower blade 24 through the intermediacy of the eccentric bearing 44, which may be rotated after loosening the set screw 45 to shift the pitman 37 laterally until the blades are in proper relation with each other as above specified. rlhus proper cutting of the hair without pulling is insured, Y

From the foregoing description, vit is apparent that l have produced a hair cutting machine in which all parts are readily ac- Y cessible and can be either quickly assembled or talren apart should repairs or replacements so require, and while lhave shown and described the preferred form of my invention, reserve the right to maire such changes in the construction, combination, and arrangement of parts as properly fall within the spirit and scope of the claims.

Having thus described my invention, what l claimV and desire to secure by Letters Patent, is:

V1. In a device of the character described,

a main member, a blade holderoperably se- Y cured to said main holder and capable of I adjustment to different inclinations while the device is in operation, a relatively stationary blade carried by said blade holder, a movable blade to coact with said stationary blade, and means for actuating said movable blade.

2. In a device of the character described, a main member, a handle therefor, a blade holder pivotally secured to said main member and capable of adjustment to different inclinations while the device is in operation, a relatively stationary blade carried by said blade holder, a reciprocatory blade mounted upon said stationary blade, and means for actuating' said reciprocatory blade.

In a device of the character described, a main member, a blade holder pivotally secured to said main member and capable of adjustment to different inclinations while the device is in operation, means tending` to l restore said blade holder to a given position,

a relatively stationary blade carried by said blade holder, a movable blade to coact with said stationary blade, and a pitman for operating said movable blade.

4;. In a device of the character described, a main member, a rockable blade holder secured to said main member, a relatively stationary blade carried by said blade holder, a reciproca-tory blade to coact with said stationary blade, and a thumb piece on the blade holder to rock the same.

5. In a device of the character described, a main member, a handle therefor, a blade holder rockably secured to said main member, a relatively stationary blade carried by said blade holder, a movable bla-de to coact with said stationary blade, a pitman for reciprocating said movable blade, a drive shaft having' an eccentric terminal to actuate said pitman, and an antifriction roller mounted upon said eccentric terminal.

6. In a device of the character described, a main member, a blade holder operably secured to said main member and provided near its forward side with depending pins and near its rear side with a depending lug, a relatively stationary blade bearing against the underside of said lug and provided with openings to receive said pins, a bolt extending through said stationary blade and the blade holder to secure them together, and a reciprocatory blade mounted between the stationary blade and the blade holder and provided with slots for the passage of the de )ending pins.

In a device of the character described, a main member, a handle therefor, a blade holder pivotally secured to said main member and having an oblique opening extending therethrough, a relatively stationary blade secured to said blade holder, a reciprocatory blade mounted between said stationary blade and the blade holder, and a pitman extending through the oblique opening in the blade holder and engaging the reciprocatory blade to actuate the same.

8. In a device of the character described, a main member having a depending yoke at its forward end, a blade holder rockably mounted in said yoke, a relatively stationary blade secured to said blade holder, a reciprocatory blade to coact with the stationary blade, means to limit the rockable movement of the blade holder and a resilient member to normally retain the blade holder against said means. 1

9. In a device of the character described, a main member, a blade holder rockably mounted on said main member, a set screw in the main member to limit the rockable movement of said blade holder, a spring 'to normally retain the blade holder against said set screw, and cutting blades rockably controlled by the blade holder.

10. In a device of the character described, rockable cutting blades, a handle, means for rocking said blades while the device is in operation, and mechanism operably-connecting said cutting blades and the handle.

11. In a device of the character described, a relatively stationary blade, a reciprocatory blade, a pitman for actuating said reciprocatory blade, and an adjustable support for said pitman whereby the same can be moved laterally t0 adjust the reciprocatory blade longitudinally of the stationary blade.

12. In a device of the character described, a relatively stationary blade, a reciprocatory blade, a pitman for actuating said reciprocatory blade, and eccentric means whereby said pitman can be adjusted laterally, to adjust the reciprocatory blade into proper relation with the stationary blade.

13. In a device of the character described, a relatively stationary blade, a reciprocatory blade, a pitman for actuating said reciprocatory blade,\a spindle projecting from said pitman, and an eccentric bearing adapted to adjust the spindle laterally to cause the pitman to adjust the reciprocatory blade into proper relation with the stationary blade.

14. In a device of the character described, a relatively stationary blade, a reciprocatory blade, a pitman for actuating said reciprocatory blade, a spindle projecting from said pitman, an eccentric bearing adapted to adjust the spindle laterally to cause the pitman to adjust the reciprocatory blade into proper relation with the stationary blade, a support for said bearing, and means for securing said bearing after adjusting the spindle.

In testimony whereof I aiiix my signature in the presence of two witnesses.

SAMUEL M. COFFMAN.

Witnesses:

F. G. FISCHER, L. J. FISCHER.