US1213702A - Governor for electric-lighting generators for motor-cars. - Google Patents

Description

H. C. H. SMYTH.

GOVERNOR FORELETRIC LIGHTING GENERATORS FOR MOTOR CARS. APPLICATION HLED 091.26. 191 5.

1 21 3,702. Patented Jam 23, 1917.

'B F B2- Witnesses HERBERT CHARLES HUMPHREY SMYTH, OF LONDON, ENGLAND,

GOVEBINOR FOR ELECTRICPLIGHTING GENERATORS FOR MO 'Ill'OIl3.-(L.\.RS

To all whom it may concern:

Be it known that I, HERBERT CHARLES HUMPHREY 'SMYTH, a subject of the King of 'England, residing at London, in the Kingdom of England, have invented anew and useful Governor for Electric-Lighting Generators for Motor-Cars, of which the' following is a specification.

' In motorcar lighting apparatus, the varying speeds of the car affect the output of the generating dynamo, and it is usual to provide means for controlling the output by opening or closing. extra. circuits through which current can flow, and also by openmg and closing the external circuit of the (iyniuno at predetermined speeds of .the armature.

, It is the object of this invention to provide a centrifugal governor capable of be ing regulated, during working, for any speed and consisting of a single weighted lever arm pivoted to a support on the armature shaft and acting on a co-axial pin whichslides in a stationary support in contact with multiplied leverage under adjustable springcontrol for the purpose of making or breaking an electric circuit.

My invention is shown in the accompanying drawings, in which 2-.-

Figure 1 a side elevation, partly in section, of the device with the regulating spring omitted for the sake of clearness; Fig. 2 an end view of the statlonary support for car ,rying the regulating spring and electrical contacts;,Fig. 3, a diagram showing the positions of the electrical contact blocks arranged for breaking the electrical circuit at predetermined speed.

The regulating device is of the centrifugal type, that is to say it is operated by a weighted centrifugal lever W pivotally secured at H to a support D which is fixed to the armature shaft A of the generating dynamo; the end of the lever W, when subjected to centrifugal force, acts against a sliding pin or plunger which in turn presses against a lever L The pin or plunger P is mounted in an' aperture in a stationary. support or plate F which also carries the said lever L and other parts of the device. The lever Ifl'is pivoted at l-Pradially' toward the pin P and engages a lever L near the pivot H. This le, er L is diametrically-v Specification of Letters Patent.

Patented Jan. 23, 1917.

Application filed October 26, 1915. Serial No. 58,078.

pivoted at H and is fitted with a pin E i which carries the contact block B which latter may be so disposed as to normally rest in contact with the stationary contact blocks B and B The said levers L and L are kept pressed against the pin or plunger P by means ofa coiled spring O, see Fig. 2, which with'the end 0 engages the lever L and with the other end 0 is fixed to the spindle Q, on which the spring is coiled.

The action of turning thesquared end Q? of the spindle Q, in the one direction or the other will either increase,.or decrease, the tension of the spring, said spindle being locked by a screyv S. It will be evident that when the weighted lever .W is under centrifugal force, it presses against the pin P and by means of the multiplied leverage will shift the contact block B and so break the electrical contact with the blocks B and B .The multiplied leverage is provided so as to which'is subjected to centrifugal force, is the weighted lever V. The regulating spring 0 does not move or revolve and therefore can be adjusted while the dynamo is in operation and as it is not attached/co the shaft A, it is not affected by the heat generated in the armature.

The foregoing description refers to the arrangement of contact blocks B, B and B when the device is required to break electrical contact at any predetermined speed of the armature shaft, but it will be clear from the alternative arrangement shown in Fig. l that when the contact block B is normally held apart from B and B, the device will serve. to'make electrical contact when the predetermined speed is attained. It is to be naturally understood in both cases that the stationary blocks B and B are insulated and form part of an electrical circuit.

I claim:

1. A centrifugal governor for electrical generators comprising a centrifugal lever rotating with the dynamo-shaft and separate contact-operating mechanism carried on is that the only part of this mechanism anadjacent stationary supporting plate within the generator, said mechanism consisting of a sliding pin co-axial with the pin,

ary supporting plate, a radially disposed le-' .ver pivotallymounted on the latter and controlled at its free end by the said sliding a contact lever pix oted diametrically opposite the radial lever and controlled thereby at its free end, a fulcrum-pin fast Jon the contact lever; an electric contact block seated on said fulcrum-pin, a pair-of contact blocks fast on the stationary support within the path of the fulcrumed contact A block, and means for keeping the contactoperating mechanism in constant cooperation with the said centrifugal lever, as described.

QQHI a centrifugal governor for electri cal generators which comprises-a single Weighted centrifugal lever carried by the dynamo shaft and separate pin operated multiplying lever mechanism on a stationary support for electrical contacts, the combination with said multiplying mechanism

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