US2032326A - Oscillatory motor - Google Patents

Description

Feb. 25, 1936- H. LELAND OSCILLATORY MOTOR Filed Nov. 10, 1930 2 Sheets-Sheet l INVENTOR b GEORGE/9.1.51.4 0.

his ATTOR E K Feb. 25, 1936. a. H. LELAND OSCILLATORY MOTOR 2 Sheets-Sheet 2 Filed NOV. 10, 1930 D. .N P w w: M m a W m /m .M h a w W x 2/0. a 2

Patented Feb. 25, 1936 PATENT OFFl-CE 2,032,326 osoram'ronr Moron George H. Leland, Dayton, Ohio, assignor to The Leland Electric Company, a corporation of Ohio Application November 10. 1930, Serial No. 4%,570

37 Claim.

This invention relates to an automatic circuit breaker and closer and more particularly to a circuit breaker and closer of the type employed for causing the circuit to be closed through one or more lights at predetermined intervals and which is commonly known as a flasher. In devices of this kind in which the circuit breaking and closing element comprises a mercury tube switch, which is moved in one direction by electrlcally operated means and is moved in the other direction independently of the electrically operated means, it is necessary to retard or so regulate the movement oi. the circuit breaking and closing element as to provide a relatively slow and uniform movement thereof. Heretoiore it has been customary to employ a dash pot for this purpose but this has not been entirely satisfactory because it has been found impractical to prevent all leakage of fluid from the dash pot and after amore or less extended operation the retarding action of the dash pot will vary and the timing of the circuits will be altered.

One object of the present invention is to provide improved means for regulating the return movement of the circuit breaking and closing element in an automatic circuit breaker and closer.

A further object of the invention is to provide an automatic circuit breaker and closer of this character in which the movements of the circuit breaking and closing element will be regulated by an inertia controlled device.

A further object of the invention'is to provide a circuit breaker and closer of this type which will be simple in its construction. and which will operate indefinitely without variation in the timing of the circuits.

Other objects of the invention will appear as the device is described in detail.

In the accompanying drawings Fig. 1 is a front elevation of a circuit breaker and closer embodying my invention; Fig. 2 is a top plan view of the same; Fig. 3 is a section taken on the line 1-3 of Fig. 1; Fig. 4 is a rear view showing the cushioning device; Fig. 5 is a detail view oi! the arm which acts on the cushioning device; Figs. 6, 7, 8 and 9 are detail views of different forms oi. mercury tube switches which may be used in the apparatus; and Fig..l is a circuit diagram.

In these drawings I have illustrated one embodiment of my invention and have shown the same in connectionwith a switch for controlling lamp circuits but it will be understood-that this particular embodiment has been chosen for the purposes of illustration only and the device may take various terms and may be used {or various purposes without departing from the spirit of the invention.

In canying out my invention I provide a. tiltable circuit breaking and closing element, preferably a mercury tube switch, which is moved in one direction by suitable electrically operated means and is moved in a reverse direction independently 01 said electrically operated means, this return movement being preferably eflected either partly or entirely by gravity. Connected with the tiltable circuit breaking and closing element for movement in unison therewith is an inertia element which regulates the movement 01 the circult making and'breaking element in such a manner that these movements are efIected at relatively slow speed and with absolute uniformity. The apparatus may take various forms and the inertia element may be actuated either directly by the electrically operated means, and thus constitute the driving element for the circuit breaking and closing element, or it may be independent of the electrically operated means.

In that particular embodiment here illustrated the circuit breaking and closing element comprises a mercury tube switch l0 having, in the present instance, threecontacts, as shown at ll I2 and I3. This mercury tube switch is mounted in clips H carried by a supporting member it which is here shown as an arm pivotally mounted at one end on a'fixed stud lo and-having at its other end a toothed segment IS. The toothed segment [8 meshes with a pinion l1 rigidly secured to and, in the present instance. forming a part of a shaft [8 to which is rigidly secured a disk N. In the present form of the apparatus this disk constitutes a part of an induction motor and is arranged between the pole pieces of an electro-magnet, the coil oi which is shown at 2|.

The magnet as a whole is pivotally mounted, as

shown at 22, so that the pole pieces may be adjusted with relation to the periphery of the disk to vary the power which is applied to the disk and to control the speed at which the disk is driven. The direction of rotation of the disk by the electro-magnet is such that when the magnet is energized the supporting member iii will be moved upwardly by the action of the pinion ii on the segment it. The circuit for the electro-magnet is so connected with the mercury tube switch that the upward movement of this switch. along with the supporting member, will break the circuit through the magnet. thus deenergi zing the same and releasing the inertia wheel and supporting member for movement in a reverse direcon; The supporting member and the mercury position but I prefer to supplementthe weight of these parts, and to make the supplemental weight adjustable with relation to the supporting 10 member so that it may be adjusted to vary the actionof gravity on the'supporting member and mercury tube. As here shown, an arm 23 is pivotally mounted on the supporting member i5 between the ends of the latter and is 'frictionally 5 held'in adjusted positions and this arm is provided at its lower or outer end with a weight 2i. When this weight is moved toward the free end of the supporting member it will materially in crease the weight of that structure and when it is moved toward the pivoted end of the supporting member it will decrease that weight, and if moved beyond the axis of thesupporting member, as shown in dotted lines in Fig. 1, it will tend to counterbalance theweight of the supporting 25 member and the mercury tube.

To avoid the shock or jar which would result from the sudden stopping of the supporting member and mercury tube I have provided a cushioning device which will yieldably check the move- 30 mentof those parts in both directions. This cushioning device preferably comprises an endless band 25, such as a'helical spring; which,-in the present arrangement, is supported about the axis of the inertia wheel and the axis of the sup- 35 Porting member, the supports for the endless band being of such a diameter that the two stretches of the band will be spaced some distance apart. Rigidly connected with the supporting member 'i s and, in the present instance formed integral there- 40 with,isanarm2l having atitsfree endatransverse finger 28 which extends between the upper and lower stretches of the yieldable band 28 and will contact with one or the other of those stretches as the tube supporting member appreaches the limit of its movement in either direction, thus yieldably checking that movement. The contraction of the band-after it hasbeen enaged by the finger," will tend to impart a reverse movement to the fing'er and thus facilitate the initial movement of the tube supporting member in the opposite direction. Preferably the part or finger 2| .is adjustable lengthwise of the arm 21 andoftheslidable band llsoastovarythe distance traveled by the finger upon each oscilla- 55 tion of the supporting member. As here shown,

the, fingeris formed separate from the arm and is secured thereto in adjusted positions by means of a screw 2! which extends through-a longitudinal slot II in the arm. The upper and .lower so portions of the yieldable band are normally spaced apart a imiform'distance and by adjusting the finger it can be caused to eng ge oneor the other of these portions of the band earlier or later in the movement of the tube supporting member.

65 It is also desirable to provide means for positive ly checking the movement of the arm 21 and the supporting member after the finger has engaged the band. For this purpose Iprefer-toprovide parts'extending lengthwise of the band and form- 70 ing stops, the two stops diverging in a direction awayfrom the axis of the arm 11. In the present construction the supporting' member and the inertia wheel ll are mounted on a vertically ar. ranged base plate ll. One endof the shaft of 75 the inertia water is mounted in a b aring a:

mounted in the plate 3i and extending beyond that side thereof opposite the inertia wheel and the other end of the shaft is journaled in a hearing 33 carried by an arm 34 rigidly mounted in a terminal block 35 which in turn is rigidly secured to the base plate. The end of the stud ita on which the supporting member is mounted projects beyond the rear side of the plate 3i and the endless band is mounted about collars 36 sup ported, respectively, by the projecting ends of the bearing 32 and of the stud lid. The plate Si is provided with an opening 31 through which the finger 28 extends and the upper and lower, edges of this opening diverge away from the stud I50 and constitute the stops which positively limit the movement of the arm 21 and of the supporting member, alter the finger has contacted with the resilient band. The size of the opening 31 is such that in all operative positions the finger 28 will engage the band before it engages the fixed stops. The angular arrangement of the fixed stops is such that with any adjustment of the finger on the arm 21 the arm will move the same distance and will occupy the same angular position when the finger engages the fixed stop. When the finger is positioned near that end of the arm remote from the axis the finger will engage the yieldable band earlier in the movement of the arm than itwill when the finger is closetotheaxisofthearmandthebandwillbe placed under greater tension. with the result that it will impart a quicker return movement to the arm, thus speeding up the action of the switch. The positive stops are not necessary.to the operation of the device and are used only to prevent the segment from being moved out of mesh with the pinion.

Referring to Figs. 1 and of the drawings it will be noted that the central contact ll of the mercury tube switch. is connected by a conductor 38 with a terminal 39 which in turn is connected to one side, 40, of the power line. The contact at one end of the tube, in the present instance the right hand contact i2, is connected by a conductor ll with a terminal 42, which terminal is connected by-a conductor 48 with one,

end of the-magnet coil 2| and the other end of the-coil is connected by a conductor 44 witha terminal (I which is connected by a branch 46 with the other side, 41, of the power line. The terminal I2 is also connected by a conductor 48 with a lamp or group of lamps, as shown at 4!, which lamp is connected with the line 41.

The left hand contact I! of the tube is con-- nected by a conductor II with aterminal 5i which is connected by a conductor 52 with a second lamp. or group of lamps, as indicated at 53,

and this second lamp is also connected with the line 41. It will be apparent, therefore, that when the mercury tube is in the position shown in Fig. 4 the circuit will be closed both through the elec trically operated device or magnet coil 2i and through the first lamp-ll. when the'mercury tube is tilted inthe other direction the circuit will be broken through the electrically operated device or magnet coil and'through the lamp 4! and will be closed through the second lamp-or group ofiamps '3. This arrangement closes the cir-' cults through the two lamps-alternately and if it is desired merely to make and break the circuit through one lamp the connection with the contact- I! may be eliminated or a two contact tube may be employed, as shown in Figs; 8 and 8. Iprefertouseacurvedcontacttubebutthis isnotessentiai andastralahttubesuchasis shown in Figs. 6 and 7 may be preferable for certain purposes.

When the mercury tube switch is inclined in the direction shown in Figs. 1 and 10 the circuit will be closed through the electrically operated device and upward movement will be imparted to the tube, thus tilting the same in the opposite direction. Thls'tiiting movement will result in the breaking of the circuit through the electrically operated device before the tube has completed its movement and the disk I! will then function as an inertia. wheel to assist in the completion of the movement of the tube and its supporting member. When the upward movement has been completed and checked by the cushioning device, the tube and its supporting member will move downward by gravity, but in so doing must overcome the inertia oftthe inertia wheel I! and the action of this inertia wheel will cause the tube to move downwardly at a relatively slow and uniform speed. -The tube will be tilted toward its first mentioned position sufficiently to again close the circuit" through the electrically operated device before the tube completes its downward movement, but due to the action of the inertia wheel the downward movement of the tube will be continued against the action of the electrically operated device, which will then function as a brake to retard and finally stop the movement of the tube. After the downward movement of the tube has been stopped the electrically operated device must overcome the inertia of the inertia wheel before the tube again begins its upward movement, thus preventing the sudden starting or jerking of the tube. Due to the lag of the mercur'y in the curved tube the angular position to which the tube must be moved to open the circuit is substantially higher than the position to which it must be moved to close the circuit. Consequently the electrically operated device or motor will not begin to function until the tube has completed the major. portion of its downward movement and will then continue to function until the tube has completed the major portion of its upward movement. The speed at which the mercury tube is tilted from one position to the other may be varied slightly by adjusting either the pole pieces of the electro-magnet or the weight 2 or by a proportionate adjustment of both these parts, but mainly by adjusting the linger on the arm of thecushioning device. By varying the power exerted on the supporting member to impart return movement thereto, as

by adjusting the weight 2'4, with relation to the power of the electrically operated device. the timing of the switch may be varied, that is, the circuit may be retained closed for a longer or shorter period of time with relation'to the period that it remains open.

While I have shown and described one embodiment of myinvention I wish it to be understood that I do not desire to be limited to the details thereof as various modifications may occur to a person skilled in the art.

Having now fully described my invention what I claim ,as new and desire to secure by Letters Patent, is:

1. In a device of the character described, a mercury tube switch mounted for oscillating movement under electrical power controlled by its own, circuits, and an inertia wheel operatively connected with said switch to control the frequency of said oscillations.

2. In a device of the character described, an

inertia "wheel; "ii-Them tube switch mounted for oscillating movement in unison with said inertia wheel, and adjustable power means for varying the amplitude and'frequency of said oscillations.

8. In a device of the character described, an

inertia element, a mercury tube switch mounted for oscillating movement in unison with said inertia element, and opposed power means controlled by said switch and individually adjustable to vary the frequency of said oscillations and the relative duration of the on and oil time of the circuits controlled by said switch.

4. In a device of the character described. a mercury tube switch, a supporting member for said switch pivotally mounted for movement in one direction by gravity, a weight connected with said supporting member and adjustable with relation thereto to vary the action of gravity thereon, electrically operated means for moving said supporting member in the other direction, said electrically operated means being adapted tobe so connected with said mercury tube switch that the circuit through the same will be broken by a predetermined movement of said supporting member in the last mentioned direction, and an inertia element connected with said supporti ir member'and adapted to impart further movementthereto after said circuit has been broken and to retard the reverse movement thereof by gravity.

5. In a device of the character described, a

mercury tube switch, a supporting member for saidswitch pivotaily mounted for movement in one direction by gravity, electrically operated means'for moving said supporting member in the other direction, said electrically operated means being adapted to be connected in circuit with said mercury tube switch, said switch being so arranged that the circuit will be broken before said supporting. member completes its movement in the last mentioned direction and will be closed before said supporting member completes its movement in the first mentioned direction,

and an inertia element connected with said supporting member and arranged to completethe movement thereof after caidcircuit has been broken and to retard the initial movement thereof in both directions.

6. In a device of the character described, a circuit breaker and closer mounted for movement in one direction by gravity, electrically operated means. for moving said circuit breaker and closer in the other direction, said electrically operated means being adapted to be so connected with said circuit breaker and closer that the'circuit through the same will be broken by a predetermined movement of said circuit breaker and closer in the last mentioned direction, an inertia element connected with said circuit breaker and closer to impart further movement thereto inthe same direction after said circuit has been broken and to control its movement in the other direction. I

7. In a device of the character described, a

.circuit breaker and closer pivotaily mounted for movement in one direction by gravity, electrically operated means for moving said circuit breaker and closer in the other direction, said electrically closer for movement therewith, a part connected operated means being adapted to be so connected operated means being adapted to be so connected with said circuit breaker and closer that the circuit through the same will be opened by a pre-. determined movement of said circuit breaker and closer in the last mentioned direction, an inertia element connected with said circuit breaker and closer for movement therewith, a part connected with said circuit breaker and closer for movement therewith, a yieldabie device' having portions arranged on opposite sides of said part for engagement thereby when said circuit breaker and closer approaches the limit of its movement in either drection, and means for adjusting said part tow! and from the axis 01' said circuit breaker ar loser.

9. In a dwice oi the character described a circuit breaker and closer pivotally mounted for movement in one direction by gravity, electrically operated means for moving said circuit breaker.

and closer in the other direction, said electrically operated means being adapted to be so connected with said circuit breaker and closer that the circuit through the same will be opened by a predetermined movementoi said circuit breaker and closer in the last mentioned direction, an inertia element connected with said circuit breaker and closer for movement therewith, a part connected with said circuit breaker and closer for movement therewith, a yieldable'device' having portions arranged on opposite sides of said part for engagement thereby when said circuit breaker and closer approaches the limit of its movement in either direction, means for adjusting saidpart toward and iromthe axis of said circuit breaker and closer, and fixed stops arranged on opposite sides 0! said part and diverging from the axis of said circuit breaker and closer.

10. In a device of the character described, 'a circuit breaker and closer pivotally mounted for movement in one direction by gravity, electrically operated means for moving said circuit breaker and closer in the other direction, said electrically operated means being adapted to be so connected with said circuit breaker and closer that the circuitthrough the same will be opened by a predetermined movement of said circuit breaker and closer in the last mentioned direction, an inertia element connected with said circuit breaker and closer for movement therewith, a part connected with said circuit breaker and closer for movement therewith, and an elastic bandhaving upper and lower stretches arranged on opposite sides of and in the path of said part1 11. In a device of the character described, a

circuit breaker and closer pivotally mounted for movement in one direction by gravity, electrically operated means for moving said circuit breaker and closer in the-other direction, said electrically operated means being adapted to be so connecte l with said circuit breaker and closer that the cir cuit through the same will be opened by a predetermined movement of said circuit breaker and closer in the last mentioned direction, an inertia-- element connected with said circuit breaker and closer for movement therewith, a. part connected with said circuit breaker and closer for movement therewith, a vertical base plate on which said circuit breaker and closer and said inertia element are mounted, said plate having an. opening therethrough, the upper and lower edges of which diverge, a part connected with said 'circuit breaker and closer for movement therewith.

and extending through said opening, and a cushioning device supported on that sideot said base plate opposite said circuit breaker and closer and having resilient members arranged on opposite sides of and in the path of said part.

12. In a device 01 the character described, a clrcuit'breaker'and closer, an oscillating inertia element operatively connected with said circuit breaker and closer, and electrical power means movement, electrically-operated means ior imparting initial movement to said circuit breaker and closer, said circuit breaker and closer being --connected in circuit with said electrically operated means and arranged to break the circuit therethrough at the end of said initial movement,

-' and an inertia wheel connected with said circuit breaker and'closer to impart iurther movement thereto in the same direction atter the circuit has been broken through said electrically operated means and to retard the initial movement thereof in the opposite direction.

14. In a device of the character described, a circuit breaker and closer mounted or tilting movement and movable in one direction by gravity, electrically operated means for imparting initial movement to said circuit breaker and closer in the other direction, said circuit breaker and closer being connected in circuit with said electrically operated means and arranged to break the circuit therethrough at the end of said -initial movement, and an inertia element 'connected with said circuit breaker and closer to impart further movement thereto in the same direction after the circuit has been broken through said electrically operated means and to control its movement in the opposite direction.

15. In a device oi the character described, a circuit breaker .and closer mounted for tilting movement and movable in one direction by gravity, electrically operated means for imparting initial movement to said circuit-breaker and closer in the other direction, said circuit breaker and closer being connected in circuit with said electrically operated means and arranged to break the circuit therethrough at the end or said initial move-.

ment, and an inertia element connected with said circuit breaker and closer to impart further movement thereto in the same direction alter the cir.- cuit has been-broken through said electrically operated means, and to retard the initial movement of said circuit breaker and clow by'gravity in the reversedirection. 1

18; In a device of the character described, a

, circuit breaker and closer. mounted for tilting movement and movable in one direction by gravity, electrically operated means for moving said circuit breaker and closer in the other direction, said circuit breaker andcloser being connected in circuit breaker and closer mounted for tilting movemen and movable in one direction by grav-' ity, electrically operated means for moving said circuit breaker and closer in the other direction,

said circuit breaker and closer being connected in circuit with said electrically operated means and arranged to break, said circuit when it has been moved a predetermined distance by said electrically operated means and to close said circuit when it has been moved a predetermined distance by gravity, and an inertia element connected with said circuit breaker and closer to retard the initial movement thereof by said electrically operated means, to complete the movement thereof after the circuit has been broken through said electrically operated means, to retard the initial movement thereof in a reverse direction by gravity, and to regulate the speed at which said gravity movement is completed.

18. In a device of the character described, a circuit breaker andcloser mounted for tilting movement and arranged to move in,one direction by gravity, an electrically operated device to move said circuit breaker and closer in the other direction and connected in circuit therewith, rind an i inertia element connected'with, said circuit breaker and closer and arranged to cause the same to move at substantially a uniform speed in both directions.

19. In adevice of the character described, a circuit breaker and closer mounted for tilting movement, an electrically operated device for actuating said circuit breaker and closer, and an inertia element operatively connected with saidcircuit breaker and closer and arranged to act on the same separately from said electrically operated device to move said circuit breaker and closer in either directiom 20. In a device of.the character. described. a

circuit breaker and closer mounted for tilting.

movement and movable in one direction by grav ity, electrically operated means for moving said circuit breaker and closer in the .other direction, said electrically operated means being so connected with said circuit breaker and closer that the circuit through the same will be broken by the movement of said circuit breaker and closer in the last mentioned direction, an inertia wheel movable in both directions by inertia, and means for causing the movement of said wheel in either direction to be transmitted to said circuitbreaker 'and closer.

21. In a device of the character described, a mercury tube switch, a supporting member for said switch, pivotally mounted for movement in one direction by gravity, electrically operated means for moving said supporting member in the other direction, said electrically operated means being adapted to be so connected with said mercury tube'switch that the circuit through the same will bebroken by the movement of said supporting member in the last mentioned direction, and a balanced inertia wheel operatively connected with said circuit breaker and closer to move the same in both directions independently of said electrically operated means.

22. In a device of the character described, a mercury tube switch, a supporting member for said switch moimted for tilting movement, a balanced inertia wheel, a constantly operative connection between said inertia wheel and said supporting member to cause the same to move in unison. and electrically operated means for moving said supporting member and said inertia wheel in one direction, said electrically operated means being adapted to be so connected with said switch that the circuit through the same will be broken by the movement of said .sipporting member. by

said electrically operated means.

23. In a device of the character described, a

mercury tube swith, a supporting member for said 'switch mounted .i'or tilting movement, an induction motor comprising a rotatable disk and an electro-magnet for rotating said disk, said disk being arranged to function as, an inertia wheel when said electro-magnet is deenergized. and means for operatively connectingsald .disk with raid supporting member, said electro-magnet being adapted to be so connected with said switch that the circuit through the same will be broken by the movement of said supporting member in one direction and said disk caused to 'function as an inertia wheel to control the movement of said supporting memberafter said circuit has been broken.-

p 24.1n'a device of the character described, a

mercury tube switch. a supporting member for said switch pivotally mounted for downward movement by gravity, an induction motor comprising a rotatable diskand an electro-magnet ior rotating said disk, said disk being arranged to function as an inertia wheel when said electromagnet is deenergized, and-means for causing saidsupporting member to move in unison with said disk, whereby said electro-magnet when energized will impart upward movement to said supporting member, said e1ectro et being adapted to be so, connected with said switch that the circuit through the same will be broken by tt,he upward movement of said supporting memer. s i

25.'In a device of the characted described. a mercury tube switch, a supporting member for said switch pivotally mounted. for downwm'd movement by gravity, an induction'motor comprising -a rotatable disk and an electro-magnet for rotating said disk, said disk'being arranged .to function as an inertia wheel when'said elecporting member completes its downward movement.

26. In a device of'the character described, a

mercury tube switch, a supporting-member for said I switch pivotally mounted' for downward moveme'ntbygravity. an induction motor comprising a rotatable disk and an electro-magnet for rotating'said disk, said disk being arranged to function as an inertia wheel when said electro-magnet is deenergized, means for-causing said supporting member to move in unison with said disk, wherebysaid electr'o-magnet when energized will impart upward movement to said supporting member, said electrc-magnet being adapted to be so connected with said switch that the circuit through the same will be broken by the upward movement of said supporting member, and a weight carried by said supporting member and adjustable to vary the action of gravity on said supporting member.

27. In a device of the character described, a.

- mercury tube switch,-a supporting member for .be so connected with said switch that the circuit through the same will' be broken by the movement of said supporting member, an arm I carried by said supporting member and adjustawheel will retard the intial movement of saidble, with relation thereto, and a weight carried by said arm.

28. In a device of the character described, a circuit breaker and closer mounted for pivotal movement and having means acting normally to move the same in'one direction, an. electrically operated device connected in circuit with said circuit breaker and closer and adapted to act thereon to move the same in the opposite direction, and an inertia element connected with said circuit breaker and closer and arranged to retard the initial movement thereof in both directions.

29. In aidevice of the character described, a mercury tube switch, a supporting member for said switch pivotally mounted for movement in one direction by gravity and having at one end a toothed segment, 'an'inertia wheel mounted for rotatory movement, a pinionrigidly connected with said inertia wheel, andihaving .constantly operative engagement with said toothed segment, and electrically operated means for moving said supporting member in the other direction and so connected with said switch that the circuit through the same will be broken by a predetermined movement of said supporting member in the last mentioned direction and said inertia supporting member by gravity.

30. In a device of the character described, a mercury tube switch, a tiltable supporting member for said switch having a toothed segment, at one end thereof, an inertia wheel mounted for oscillatory movement, a pinion rigidly connect edwith said. inertia wheel and having constant operative engagement with said toothed segment, and electrically operated means for, moving said inertia wheel and 'said supporting member in one 'direction, said supporting member and said inertia wheel being movable in the other direction independently of said electrically operated means, said electrically operated means being adapted to be so connected with said switch that the circuit through the, same will be broken when said supporting member is moved a predetermined distancein the first mentioned direction and said inertia wheel will retartbthe initial movement of said supporting member in the last mentioned direction.

81. In a device of the character described, a circuit breaker and closer, an inertia wheel mounted for oscillatory movement and operatively connected with said circuit breaker and closer, and yieldable reversing means arranged to act on said inertia element during the final pertion only of its movement to gradually interrupt said movement, said reversing'means being adiustable to regulate the frequency of the oscillations of said inertia wheel.

83. In a device of the character described, a

circuit breaker and closer, an inertia element mounted for oscillatory movement and operative ly connected with said circuitbreaker and closer,

and yieldable reversing means arranged to act on said inertia element during the final portion only of its movement in one direction to gradually interrupt said movement and during the initial portion only of the movementof said inertia element in the other direction to accelerate said initial movement. I l

3,4. In a device of the character described, a circuit breaker and closer, an inertia element mounted for oscillatory movement and operatively connected with'said circuit breaker and closer, and yieldable'reversing means arranged to act on said inertia element only while it is near the limit of itsmovement in one direction or the other,- to gradually interrupt said movement and to accelerate the initial movement thereof in a reverse direction. t

35. In a device of-the character described, a mercury tube switch, an inertia wheel mounted for, oscillating movement and operatively connected with said mercury tube switch to impart movement thereto, and electrical power means to maintain the oscillations of said inertia wheel,

' said mercury tube switch being, adapted to control said electrical power means.

36. In a-device of the character described, an

inertia wheel mounted for oscillatory movement,

and a mercury tube switch operatively connected with said inertia wheel for movement thereby and adapted to alternately close and open electrical circuits in unison with the oscillation of said inertia wheel.

87. -In a device of the characterdescribed, an inertia element, a mercury. tube switch mounted for oscillating movement in unison with said inertia element, electrical power means controlled by said switch for maintaining the oscillations of said mercury tube switch, and adjustable yieldable reversing means arranged to act on said inertia element only while-it is near the limit of its movement in onedirection or the other to gradually interrupt said movement and to vary the frequency of said oscillations.

GEORGE H. mm

CERTIFICATE OF CORRECTION. 7

I te t No. .3,0C I,326r February 25, 1936.

GEORGE H, LELAND It is hereby certified that the above numbered patent was erroneously issued t "The Leland Electric Company, a corporation of Onio", as assignee of the entir interest in said invention, whereas said Letters Patent should have been issued to the inventor, George H. Leland and The Leland Electric Company, a corporation of Ohio, said corporation being assignee of one-half interest only in said invention, as shown by the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 51st day of March, A. D. 1936'.

Leslie Frazer (Seal) Acting Commissioner of Patents.

CERTIFICATE or CORRECTION. 7-

Patent No. 2,032,326. February 25, 1936.

GEORGE H, LELAND It is hereby certified that the above numbered patent was erroneously issued to "The Leland Electric Company, a corporation of 0hio", .as assignee of the entire interest in said invention, whereas said Letters Patent should have been issued to the inventor, George H. Leland and The LelandElectric Company, a corporation of Ohio, said corporation being assignee of one-half interest only in said invention, as Shown y the records of assignments in this office; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 51st day of March; A. D. 1936".

i eslie Frazer Acting Commissioner of Patents.

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