US994470A - Hair cutting and shearing machine. - Google Patents

Description

- P. KOBER.

HAIR CUTTING AND SHEARING 111101111115.

APPLICATION FILED MAY 13,1910.

Patented June 6,1911.

, head of a screw other blade put in its place.

PATENT OFFICE.

FRITZ KOBER, OF SUHL, GERMANY.

HAIR CUTTING- 'AND SHEABING MACHINE.

Specification of Letters Patent. Patented 11118 6, 1911.

Application filed May 13, 1910. Serial No. 561,082.

To all whom it may concern:

Be it known that I, FRITZ KOBER, a subject of the King of Prussia, German Empire, residing at Suhl, Thiiringen, Germany, have invented certain new and useful Improvements in Hair Cutting and Shearing Machines, of which the following is a specification.

This invention relates to hair-cutting machines, shearing machines and the like.

Under my invention the hair-cutting machine or shearing machine is so constructed that it'is possible to change the shearing blade without having to take the machine to pieces, that is tosay, the change can be effected in a more simple and more convenient way than hitherto possible. This result is attained by the use of a flap which is adapted to carry the interchangeable shearing blade, and is so hinged or attached to the body of the machine that it can be turned around. This flap) is held in position by the olt which passes through the body of the machine, and it can be released by giving the bolt a quarter of a turn. When this turn of the bolt is given and the flap released from engagement with the head thereof, a-spring acts upon the flap and causes it to spring into the open position. When it is in that position, the shearing blade can be taken out very easily and an- The bolt only turns through 90, so that its square head can be. introduced without any difliculty into a notch or slot cut in the flap, and accessible when i the flap is raised, and by turning the bolt, the head "thereof can be engaged with the flap. When that has been done, the; .flap is drawn against the body of the apparatus by giving further turns to the screw nut, and the interchangeable shearing blade is thereby brought into position against the upper knife. To facilitate this, and render it possible for the interchangeable blade to lie close against the upper knife and make a faultless cut, the formeris held or attached at i'MO or more points lying in a straight line and not by three points forming a rigid triangle.

In order that my invention may be clearly understood, a hair-cutting machine, made in accordance with my invention, is shown in the drawing, by way of-example.

Figure 1 is a side View of the machine. Fig. 2 is a plan view of the same showing the flap d in open position. Fig. 3 is a front I means of a spring which is wound around its axis of rotation. (In Fig. 1 the open position is shown in dotted lines.)

The flap d has a long four-sided opening 6 cut in its under side, and into this opening, the head of the screw bolt g, (which passes through the body of the apparatus 6) can enter. The head of the bolt 9 is made of suitable form for this purpose, and, by turning it, it can be made to engage in the opening. The screw bolt 9 is provided with projection h and can make only one quarter of a turn, its movement being limited by its projection h which works in the recess formed in the body I). On the screw bolt there is a nut z, knurled on the, edge, and between this nut and the body 6 an arched fiat spring k is provided. The interchangeable shearing blade 0 is secured on two pins Z provided on the flap d, and it is held fast thereon by means of a small turn bolt m.

The points of attachment of the shearing blade 0 taken altogether do not form any rigid system, as theywould do in a triangular hearing, but they lie in a straight line, and so it is possible for the under shearing blade 0 to turn about an axis drawn through these points of attachment, and, conselquently, to lie close against the upper cutt1ng blade.

When it is desired to change the blade 0, i

the nut '21 is turned to the left z'. e. the dl? rection for unscrewing the nut from the" bolt. During this rotation the nut i will come against the pin a which passes transversely through'the screwbolt 9. On further rotating the nut i, the nut will press tifghtly against the pin a and in consequence o the friction set up through this turning, the bolt 9 will itself be rotated and consequently" its head f will come into its other end position parallel to the opening am the flap d. The flap is thereby released and under the action of its spring, opens as shown in dotted lines at Fig. 1. In this position the shearing blade can be easily taken out and another put in its place. When this has been effected the flap d is raised up again, and the nut which still bears against the pin n is turned around to the right i. e. in the direction in which the nut is screwed on to the bolt. At the beginning of this turning the bolt head f in consequence of the friction between the nut i and the pin n makes a quarter of a turn and engages in the opening 6 of the flap d. All that is now required is to turn the nut 11 further around thereby compressing the spring la so that the two cutting blades will press against each other. The apparatus is now ready for use.

Having now fully described my inven- The combination in a hair-cutting or the body, a cutting blade removably and ad-4 justably secured to the hinged flap, a slot in the flap, a screw bolt (g) having a head en-- gaging 1n the slot and retainin the flap in the closed position and a nut 11) and stop pin (n) on the bolt whereby movement of the nut in the one direction presses the cutting blades together while movement in ,the other direction partially rotates the bolt and releases the flap.

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

. FRITZ KOBER. Witnesses:

0. 11mm, Cum WAGNER.

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