US1454151A - Electric hair drier - Google Patents

Description

May 8, 1923 R. H. BRCDWN ELECTRIC HAIR DRIER Filed Feb. 24 1921 a Sheets-Sheet 1 May s-{ wza R. H.- BROWN ELECTRIC HAIR DECKER Filed Feb; 24, 1921 2 Sheets-Sheet 2 Patented May 8, 1923.

UNITED STATES RICHARD H. BROWN, 01' NEW YORK, N. Y.

ELECTRIC HAIR DRIER.

Application filed February 24, 1921. Serial No. 447,377

To all whom iii may concern:

Be it known that I, RICHARD H. BROWN, a subject of the King of GreatBritain, residing at 1236 Grand Concourse, New York Hair Drier,

city, in the county of New York and State of New York, have invented certain new and useful Improvements in an Electric of which the following is a specification.

My invention relates to a new and improved hair drier.

Devices of this kind have been known for many years and they consist essentially of a heatmg element adapted for heating a current of air passing over it and means for forcing a current of air over such element.

One of the objects of my invention is to prevent the burning out of a heating element which is heated by electricity, as this .may happen if the air current is produced by means of an electric motor and the electric current is passed through the heating coil while the motor is out of circuit.

Another object of my invention is to provide an improved regulation of the temperature and volume of air delivered by the device. 7

Another object of my invention is to provide a ready adjustment of the device so as to direct the current of .the heated air at varying angles.

Another object of my device is to enable the motor to be operated independently of the heating element and to regulate the action of the device by a switch which is actuated in the same direction, in a series of separate movements.

Other objects of my invention will be disclosed in the following description and drawings which illustrate a preferred embodiment thereof.

Figure 1 is a side view, the cap of the housing being shown as partially broken away.

Flgure 2 is an end view of Figure 1.

Figure 3 is a vertical central section. a Figure 4 is asectional view showing the heating element.

Figure 5 is a section along the line 5--5 of Figure 4.

Figure 6., is an end view of the right-hand side of Figure 4.

Figures 7, 8, 9', 10, and 11 diagrammatically illustrate the electrical connections for re lating the action of the device.

he device consists of a pedestal 35 upon which the electric motor casing 9 is mounted. The feed wires 10 serve to connect the switch mechanism in housing 12 to a source of current and the wires 11 serve to carry the current to the wire 26 on element 17 which is held in the nozzle 18 of the device, as clearly illustrated in Figures 1 and 4.

An ordinary fan having blades 20 is mounted directly upon the shaft 21 of the motor and the cover 7 of the housing has a perforated part 22 as clearly illustrated in Figure 1, through which air can be sucked into the housing 1 to be expelled by the fan through the nozzle 18 and the extension 15 thereof, which is pivotally connected at 14 to the nozzle 18.

The portion 23 of the extension 15 may be made of flexible tubing and this can be caused to rest upon the holder 16 secured to the housing 1, as illustrated in Figures 1 and 2.

The air is thus sucked in through the perforated net work 22 and forced over the heating element 17 to be directed upon the hair of the person being treated.

The element 17 has a coil of wire 26 wound thereon, this wire being made of any suitable metal or alloy, so that it can become very hot under the action of a current without oxidizing or melting. This wire may be of any standard kind well known to the art and hence it requires no description, and

the element 17 is, of course, made of insu-' lating material in the well known manner. The two terminals 27 and 28 of the coil 26 .are connected to the binding posts 29 and 30 as indicated in Figure 4 and the two branch wires 11 are suitably secured to these binding posts.

The element 17 is held in place by a spider 31 having a central portion 32 which closes up the bore of the core of the said element,

so as to' prevent any air from passing ber of difierent positions, one of them being illustrated in dotted lines in Figure 1.

The left-hand flange 8 of the housing 1, as shown in Figure 3, is provided with a resilient conical member 34 which fits somewhat loosely upon the stationary hub 35' which surrounds the shaft 21 of the motor. A collar 36" may be forced against the resilient conical ring 34 b means of the rews or bolts 37, whose t readed ends fit into suitable threaded recesses in the. hub 35 so that the flange 8 is forced by means of the resilient ring 34, against the end wall of the motor casing 9, so as to be frictionally held in any position that it may occupy in the plane pe endicular to shaft21.

The cover of the housin 1 is held in position by means of the pin 5 provided with wings 6. The pin 5 is internally threaded so as to cooperate with externally threaded pin 5', so that-when the parts are in 'the position shown in Figure 2, the cover 7 is held in position by the clamp 38 which is forced into the locking position by turning the wings 6. By loosenin the pin 5 and revolving the pin 5' aroun its pivot 4 into the position shown in Figure 1, the cover 7 o the housing may be readily removed.

The regulation of the device is diagrammatically illustrated in Figures 7 to 10, the object being to accomplish this regulation by means of a revoluble switch having a head 41. It is desired that the first turn of this switch head 41 to the right shall cause the motor having the brushes 35 and 36 to operate, while no current is forced through the heating coil 26. At the next turn of the switch head 41 to the right, the motor will be actuated so as to run at relatively low speed while heating currentis sent through the coil 26. At the next. turn of the switch head to the right, the amount of current sent through the coil 26 is somewhat diminished, and the motor is driven at a higher speed so that the temperature of the air being forced through the nozzle is lowered as a smaller amount of heat is supplied to a greater volume of air. At the next turn of the switch head 41 the current sent to the series motor'in casing 9 is relatively increased,

1 and that sent through the heating coil is relatively diminished so that a larger and relatively cooler air current is produced. At the next turn of the switch head 41 to the right, the currentis switched off the heating element and the motor. It is, of course, understood that each turn of the switch head 41 is onl for a fraction of a revolution and the be ore mentioned operations commence at the next movement of the switch, so as to provide a continuous cycle.

As illustrated in Figure 7, the motor is directly connected by means of one of its brushes 36 to the coil 26 of the heating element and it is also connected through this coil 26 to the terminal H of the switch. The motor in 9 is also connected through the Same brush 36 to'the two regulating resistances R and R which are connected in se ries to the terminal 1 of the switch. A shunt Wire connected between the resistances R and R is also connected to the terminal 2 of the switch and another shunt wire 34 is connected to the terminal 3 of the switch.

One of the mains 10 is connected to the other brush 35 of the motor and the other wire 10 is connected to the terminal 36" of the switch. 7

The switch is mounted revolubly upon 37 and it has a bearing or contact surface designated by 38.

Inthe sition shown in Fig. 7 which may be'ca led the first position, the current passes through the bearing surface 38, and the two resistance coils R and R by means of the. terminal 36.

Since the motor is a series motor, the motor in casing 9 is caused to revolve at a relativellia low speed and to send a current of cool air t rough the nozzle 18 because the coil 26 has no current passed through it.

In the next position which may be called the second-position and shown in Fig. 11, the switch has been turned so that the bearing surface 38 is connected to the terminals 36, 1 and H. In this position the current passin to the motor flows along two paths, one o coils R and R therein an the other path having the heating coil 26 therein. Hence the coil 26 causes the air passing through the nozzle 18 to be intensely heated and the motor revolves more rapidly than in the first position of the switch.

The next or third position of the switch is shown in Fig. 8 in which the bearing sur-. face 38 contacts with the terminals 36, 1, H and 2. The resistance coil it is new short circuited and the current passes to the motor in two paths, one of these paths having the resistance coil R therein and the other having the heating coil 26 therein.

Hence the motor is caused to revolve still morerapidly than in the previous positions of the switch and the resistancecoil 26 still operates to heat the air passing through the nozzle 18.

The next position of the switch, which may be called the fourth position is shown in Fig. 9 in which the bearing surface 38 contacts with the terminals 36, 1, H, 2 and 3. Both resistance coils R and R are thus cut out of the circuit and the current passes to the motor through the heating coil 26.

In the next position of the switch shown in -F ig. 10, the bearing surface 38 no longer co tacts with the terminal 36' and the device is out of operation.

What I claim is:-

1. In an electric hair drier or the like, a

heating element adapted to be heated by the' these paths havin 'the resistance heated thereb and controlling means including switc mechanism for controlling the current sent to both said heating element and the said driving means, the first movement of said switch in the'operation of said device being adapted to cause a current to be sent only through the said driving means, the next movement of the said switch being adapted to cause the current to be fed both to the said heating element and the said driving means, the next movement ofi the said switch being adapted to cause more current to be fed to the said driving means without interrupting the current to the said heatin element and the next movement of the sai switch being adapted to cause still more current to be fed to the said driving means without interrupting the current to the said heating element, whereby a current of air is first pased over the said heating element without being heated thereby, and, a progressively increasing current of air is then caused to be passed over the said heating element.

2. In an electric hair drier or the like, a heating element adapted to be heated by an electric current, an electric motor adapted to drive means for sending a current of air over the said element to be heated thereby, and controlling means including switch mechanism for controlling the current sent to both said heating element and the said -motor, the'said switch mechanism having five terminals adapted to be contacted with by the contact head of the movable member of the said switch, one of said terminals being connected to one of the mains, the .next terminal being connected with one of the brushes of the said motor through resistance means, the next terminal being connected to the before mentioned brush through the heating coil for the heating element, thenext-term'inal being. connected to said brush through a part of said resistance means, and the next terminal being connected substan tially directl to the said brush so that the current can sent to the said brush without passing through the said resistance means, the contact head before mentioned being of suflicient length to simultaneously contact with the said five terminals.

3. In an electric hair drier, a heating element adapted to be heated by the passage of an electric current, an electric motor adapt ed to drive air-driving means combined therewith for sending a current of air over the said element to be heated thereby when an electric current is passed through said element, controlling means including a switch mechanism and adapted to control thetemperature of the air issuing from the said drier, said switch mechanism having a plurality of contacts and movable bearing means adapted to be actuated through a plurality of consecutive movements and occupy a plurality of different positions with respect to said contacts, the first position of said bearing means being adapted to cause a current to be sent only to said motor, the succeeding consecutive positions of said bearing means being adapted to cause electric current to be passed through said heating element also and also cause a lowering of the temperature of the air issuing from said drier by increasing the velocity of revolir tion of said motor in proportion to the amount of current supplied .to said heating element.

4. In an electric hair drier. the Combina tion of a hollow core located in the-nozzle thereof and having a coil of wire wound upon the exterior thereof, switch means for causing current to be sent through the said coil of wire, the said coil being held at one side by a spider which closes up the hollow of the said coil and being held at the other side by a bridge.

In testimony whereof I hereunto afiix my signature.

RICHARD H. BROWN.

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