US2001920A - Motor driven switch mechanism - Google Patents

Description

May 21', 1935. G. oGURKowsKl MOTOR DRIVEN SWITCH MECHANISM Filed May 24, 1928 INVENTOR cf A' TTORNEY Patented May 21, 1935 i UNITED STATES PATENT OFFICE MOTOR DRIVEN SWITCH MECHANISM Georg Ogurkowski, Zug, Switzerland, assignor to Landis & Gyr, A-G., a limited joint-stock company, Zug, Switzerland Application May 24, 1928, Serial No. 280,312 In Switzerland June 11, 1927 1 Claim.

The invention relates to new and useful improvements in motor-driven switch operating and attained by means of the instrumentalities and combinations pointed out in the appended claims.

The invention consists in the novel parts, construction, arrangements combinations and improvements herein shown and described.

VThe accompanying drawings, referred to herein and constituting a part hereof, illustrateV one embodiment of the invention, and together with the description, serve to explain the principles of the invention.

Of the drawing:

Fig. 1 is a top plan of a mechanism embodying the invention;

Fig. 2 is a side elevation looking at Fig. 1 from the top 0f the sheet; with certain parts shown in outline only, and with the front frame plate removed, for the sake of clearness.

Fig. 3 is a fragmentary horizontal section, taken on the line 3-3 of Fig. 2, with certain parts omitted; and

Fig. 4 is a vertical transverse fragmentary section taken substantially on the line 4-4 of Fig. l.

Referring now in detail to the embodiment of the invention illustrated by way of example in the accompanying drawing, a pair of parallellyarranged side plates I and 2 constitute a supporting frame for the mechanism, and these plates are held in place by a plurality of spacing and binding rods 3, 4, and 5. The switchactuating motor may be of any known and suitable form, but as preferably embodied herewith, an induction motor is provided having a field coil I0 and field poles Il and I2 formed on a core 9. The core 9 comprising the poles II and I2 is mounted on the frame plate 2 by suitable means, such as a plurality of spacing studs I3, and a plurality of clamping or holding screws I4. The rotor I1 of the induction motor has its shaft I8 journaled in supports I9 and 2U, fixed on the respective side plates I and 2 of the switch mechanism.

(Cl. 20D-92) Mechanism is provided for very greatly reducing the speed between the rotor shaft I8 and the switch-actuating devices, and as embodied, a pinion 23 is fixed on rotor shaft I8, said pinion meshing with a gear 24, fixed on a shaft 5 25, journaled in the side plates and 2. Fixed also on shaft 25 is a pinion 26, which meshes with a gear wheel 2l, fixed on a shaft 28, which shaft is likewise journaled in the frame plates I and 2. wheel 30, with which cooperates a pawl 3l, pivoted at 32 on the frame, and which is acted on by a spring 33. This prevents any backward movement of the mechanism. Fixed on shaft 28 is a pinion 38, which meshes with a .i5

gear wheel 39, later to be described.

In accordance with certain features of the invention, the driving motor is utilized to wind a spring-operated mechanism, the spring-operated mechanism in turn under the control of 20 delayed-operation devices serving to actuate the controlled switch mechanism. rIhe mechanism as exemplified operates also to open the controlled switch on one cycle and to close it on the next. invention for automatically stopping the driving motor after a single actuation of the switch mechanism, and as embodied, said mechanism cooperates with, and is structurally interconnected with, the spring-driven switch-actuat- ..30

ing devices. In the present preferred embodiment of said means, the gear wheel 39 is formed on a cylindrical casing 4I) within which is a fiat coiled spring 4I. The outer end of spring 4I is fixed to the interior of the casing 40, and V35 the inner end thereof is fixed to a hub 42, which hub is fixed to a shaft 43, journaled in the side frames I and 2 of the mechanism. Fixed to the open side of cylinder 40, by suitable means such as screws 41, is a disk-like plate or closure r4.0

48, having a hub 49, eccentrically and loosely mounted on the shaft 43.

The delayed action starting and stopping means for the spring acting switch-actuating mechanism, comprises a two-armed lever 5l, with its 45 arms 58 and 59 preferably a quadrant apart. The lever arms are fixed to a hub S3, which hub is loosely mounted on the eccentric hub 49 of the casing for the spring 4i. Means for effecting a spring buffer action in the stop mechanism is 50 preferably provided, and accordingly a spring 6I has its inner end seated in a notch 62 in the hub GG, and has its outer end pressing against a pin 63, projecting laterally from the side of a lever 54, which lever is fixed on the shaft 43.

Fixed also on a shaft 28 is a ratchet 110 Means are likewise provided by the ,25

starting and stopping the motor, as will now be Y described. The embodied form of said mechanism comprises devices, interposediin the power circuit of the motor, andincludinga contact carrying plate or arm which is engaged and moved by the arm 64 to break said power circuit and thereby stop the motor, and alsol on a sequential reverse movement of said Contact carrying plate or arm on the next subsequent cycle of the mechanism, to similarly break the power circuit and again stop the motor. Y

e Reierring new in detail Sto vthe embodiment of the said lautornatically-operated stopping means inthe motor circuit, a supporting plate i5 eX- tends transversely between and is mounted on the frame plates l vand 2. On this supporting cross plate '1:5 is mounted a block of insulating material .75, whichV carries three conducting plates 11, .'58 and 19,. which plates are each formed at an end thereof with corresponding circuit terminals 35,8? and 82. The plate il Vhas a contact piecet on 'which the plate 'i3 is seated by meansof :a spring B8, yAbar 39 of insulating material, a contact piece 9b, land the plate le carries -aspringgi 1p-rcnzided with ra contact piece 2. The

parteci.,- 88, .35, im, Sii and 92 'form an yauxiliary switch for the motor operating Vin the marinera-lreadyT described.; The contacts 3T! and S2 fmay be in parallel inthe motorpower circuit and the 'Contact '35 is :alternately 'rn closing Vcircuit with Vthese :on .successive cycles of the mechanism, and

inv eachinterwening movement breaks the circuit and stops the motor. Y e

'The contact carrying bar :or plate Sebas its outer end vin the path of movement .of the arm Sii Y (which isfxed on shaft d3) ,so asto be engaged,

moved and held by the flatter `on one cycle of the mechanism `as 'shown 'in broken vlines' Fig. 4. When onl the next succeeding -cycle arm 25@ moves on and releases bar'89, the contact ,piece YSi!) then moves against the contact piece 31. rIhe motor `circuit is thus momentarily broken during the movement of bar 39, thereby stopping vthe motor. The circuit is again made however 'when lcontacts 87 and fil@ are made, tand the main switch can again sta-rt the motor.

' Referring now vto the embodied form of an actuated switch in any controlled circuit l(such as fthat of `a clock or relay) land connection-s whereby "the .actuating ,devices of the vpresent invention move said 'actuated switch, Van arm lili is'Xed to an exterior end o'f 'thesha'it i3 outside the frame plate 2. -Fixed -to arm ylili is a pin .m2 which `.pro-

jects through .an elongated slot in a lever arm '193. Lever larm H33 yis pivotedat lii to the outer end of a lever m5,v which .in `turn is pivoted at |05.

viixed with the other endl of the .lever IE5 is laterally-projecting actuating arm mi.

Vis adapted to engage with and to move a bent Y This varm spring H33 icarrying'a'contact -liil adapted to cooperate with aiixedcontact i !ii,to openand close the `controlled fc'ircuit for a clock, relay or other Jdevic'e. The stop imechanismpreviously described -`is adapted, fon successive cycles, toimpart ,a semirotation to -slraft v473, .byireason :of 'thearm 55.8 engaging successively with the stop pins E9 and iii. It will be seen that on one semi-rotation oi shaft 53, considered as starting from the position of Fig. 4, the controlled switch terminals lie and il@ will be opened. On a successive semi-rotation of shaft E3 (bringing it back to the position shown in Fig. 4)V the switch terminals and lit or" the controlled circuit will be again closed as shown in said ligure. Y Y

In the operation of the mechanism as described the main control switch for the motor islnot shown, but may be either manually operated or automatically operated by a clock mechanism or otherwise,V When the main controlling switch for the motor driving circuit is closed (the mechanism being considered as in the position vshown in Fig. e) themotor through Athe pinion and gear train described rotates the' gear Se, and thereby winds up the spring il 'Thereis however, nov motion of the s haft 'due to the Varmoe being held bythe spring @i to the arm 59 of stop lever 5?, which flatter is held `by the stop p'inf. A Y However, due to thefrotation ef the cylindrical housing it with the V'gear' 3e, eccentric hub @i9 is rotated on shaft 133,' and `while spr-ing 34H is `being-placed under greater tensiondue to the rotation of gear 39, arm 53 is gradually being withdrawn longitudinally irom'behin'd stop pin 69 due toA the-rotation v'o-i. the eccentric hub Il@ upon which the arm is mounted. When arm 58 is thus released from stop pin 59, it immediately a half-revoluticn'at the'same time rotating lupon the eccentric bushing 4or hub i9 A(which has made a half revolution) and arm 58 Vtlfiereby moves doutward longitudinally and is 'then "stopped by stop pin li), as shown in broken lines the `impulsion of the spring iii, and arm L54 cornes to rest inthe broken line position shown lin Fig 4. The lactuation ofthe control-led switch |69, HD during each half revolutionV of Shaft 33 has already been described. jn this position it :has engaged and moved the bar or platefrom the solid tothe broken lineY position of Fig. Vll, thereby breaking vthe motor circuit during said movement and stopping the motor.

Thus when Vthe main motor switch is Athrown again, by hand or Aby -anysuitable automatic control, and the motor thereby started, the 'cycle of operations already described will `again take place, however with the parts a half-rotation ahead, and with the stop mechanism startingV will-after 4a half revolution, retract and releasel stop yarm 53 from stop pin 7i), and arm '64 rotating Afrom the broken line to the solid line position of Fig. 4 will release the bar or plate, and

will break the .circuit for the motor, thereby ,stopping it. Stop arm 58, now rotating on eccentric hub t9V will be Vradially projected, and will .again be stopped by stop pin 69, and the controlcircuit Contact l E9 and il!) will be closed.

The invention in its `broader aspects is not limited tothe speciiic mechanism shown and described but departures maybe made therefrom' within the scope of the accompanying claim withoutxfdeparting from the principles 'of the :inventioniand without `sacrificing .its chiefv ad- W vantages.

feo

What I claim is:-

Switching mechanism including in combination side frames, a shaft rotatably mounted in said frames to be driven by a motor` mounted 5 between said frames, stop pins on one side frame, a stop arm mounted eccentrically on said shaft, a spring connected to said arm and shaft to drive said arm from said shaft, a switch and operating means therefor controlled by said arm, said switch and operating means being positioned between said frames and between said shaft and motor.

GEORG OGURKOWSKI.

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