US999781A - Means for controlling electric circuits. - Google Patents

Description

W; HART. MEANS'POR CGNTROLLING ELECTRIC CIRCUITS.

APPLICATION PILEI) FEB. 21, 1910.

Patented Mg: 8,19%.

T KEFWW APPLIOATION FILED FEB. 21, 1610.

Patented Aug. 8, 1911.

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G. w. HART MQTANS FOR CONTROLLING ELECTRIC CIRCUITS.

APPLIOATIOH FILED PERM, 1910.

- Patented Aug. 8, 1911.

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ling; electric circuits and has for its object wind ing' (YE WEE? HZ LEZTFQRYJ, CONNECTICUT, ASSIGNOR TO THE HART MAN- i .ZABJJFGE F}, CONNECTICUT, A CORPQRATIONOF NEW Miilr'ihllii 7: 93, OGTNTEGLLING ELECTRIC GIBGU'ITS.

Specification of Letters Patent.

Pzitented Aug. 8, 1&1 hpplieation filed. February E1, 1910. Serial No. 5425,15Q.

Qio oldie/Loni may concern: i ings 11 and 12. An arm 13 extends from its it t ALB W. I RT, the spring plate 7 through the slot 3, so as citizen or. {All residing at to be engaged by the two ends of a spring lVest county of i srtliord State i i surrounding a sleeve 15 upon the shaft oi Connection" have inxented certain new 6. and usctnl. improvements in Means for (Jonirttord.

, The sleeve 15 has rigidly secured to it n, rock arm 16, having at its opposite ends trolling .lille. 'ic lircuits, of Villlfill the fol renrwzirdly projecting studs 11-18. These lowing 3 a full, clear, and exact description. studs 1718 are adapted to be engaged by lily invention relates to moons for controlhooks i9-f20 of a gripping member 21, which is carried by the actuating member being pivoted thereto at 2].. This actueiiicient 11182318 of conto produce new mu lIl 'ljlliilg on: in electro-mngncticnliy sting member is provided with a restraining by current from the circuit controlled. plate or extension 23, which hes in the path of a projection or detent 2 1 upon the detent plate 8, the projection 24- extending through the slot etin the rear of the supper-t1. The arm 25 oi. the detent plate is bent inward so as to travel in the same plane as the rear portion. of the support 1, and engage the ex trei'nities of the sl t ,4 at each end of its throw thereby definitely limiting the movement of the shaft (3 in each direction. The actuating nien'iber is provided with a slot 22*, through which the shaft 6 passes, and at its lower end is provided with magnetic cores 29 which extend into a solenoid 30. This solenoid is inclosed in an iron box 31 having an iron cover 32, and so are ironclad The cores 29 pass through openings in the cover. The actuating member 1 also carries a projection 33, which passes through an opening in the cover and engages a spring 34, which spring returns the actuating member 22 to initial position when the winding is decncrgized.

The rock arm 16 carries it spring engaging urn: 1(3, ends of the spring 1st. The switch arm 9 when in one position engages stationary circuit contacts 35-e36 carried by supports 535 30, and in its other position engages contacts SET-'38. The contact. 37 is carried by the support while the contact 33 is curried by an independent support 38. The switch arm 10 when in one position ongages contacts 39 carried by supports 39. The distance between contacts 2-37) and 37 and between contacts 36 and S8 is such that it further hes for its object to provide incensfor doi. it this throi'lgh single windins and to pro is means whereby this can be energized whether the switch is opened or closed, but will. be opencircnited by the subsequent action of the switch in either instance.

further lliLS for its object to provide Yo. us in; tor controlling said winding.

iho polio-sing; is it description of on eml bodhnent of my invention reference being bad to the accompanying di -wings, in .i'hich,

lligure 1 shows a front elevation of a switch 'incc ninisin adapted to be used to carry out my invention. Fig. 2 shows a side clevntion oi? the same, without the stationl my contacts. Fig. 3 shows a longitudinnl section of the some. Fig. 4 shows in detail a spring plate. Fig. 5 shows in detail the detent restraining the switch arms from niovei'ncnt while their actuating spring is being putundcr tension. Fig. (3 shows in detail the actuating member. Fig. 7 shows in detail the grab hook. Fig. 8 shows diagrsnnnntically one embodiment of my invention. Fig. 9 shows (lingrnunnnticnlly a. modification of the some.

\"crlhrring more particularly to the drzrw 1 the support tor the switch mechanism having on one side curved slots 2-3 end on the other side a. curved slot 4-. for the pur 'iosc hereinafter described. Journulcd in the support 1 n shaft 6, having on one end n spring plate 7 and on the other end i dctcnt plate 8. The ends of the shaft pass the lll'lll l) breaks engagement with 535 and 36 through rectnn uhir openings in these before making engagement Will) 37 and 38.

and \ice verse. I

The upper end of the slide Plan. 23 ttmruis the are of a circle, which, wiien the slide plate is depressed, has as its center plates and are headed over so as to seci-lre thcin rigidly thereto. The plates 7 and S are on opposite sides of the support 1. To the plates and 8 respectively are secured switch arms 9 end 10 by insulating bushl y l l which also lies between the the axis of the shde 6, and whose radius is equahto the distance between said axis and the in most part of the detent. The engagement of the detent with the upper end of the slide plate 23 prevents the slide plate from m0ving longitudinally toward its initial position, so that the member when dc pressed, is held depressed .until the switch arm has completed its full throw. Tension is thus maintained on the spring 14: until its work is completed.

The above mechanism operates as follows: When the wimling 30 is energized, the cores 29 are pulled downward, thereby moving the actuating member 22 and the hook member 21 downward. If the hook 19 is in engagement with the pin 17 at this tim e, as shown in Fig. 3, it causes the rock arm ltl to turn to'the right, puttingi the spring 14. under tension. The spring plate 7 is, however, prevented. from movement, so long as the detent .24: engages the vertical side of the ri training plate ,Vhen the actuat- Ling member has moved down sutticiently to cause tl e'restraining plate 23 to pass out of the path of the detent 24, the detent 24 passes 23, and a t the same switch arms 9 and 10, being all rigidly connected to the detent 8, turn through a corresponding angle under the impulse of the spring i i. lrhen the winding 30 is dcenergized, he spring 254; returnstthe actuating memberl to normal position, where upon the projection 17 engages the lower portion 19 of the gripping member 52, causing it to tilt toward the right until the hook 20 grips the projection 18 upozrthe rock member 16. In Fig. 3, the pin 18 has engaged the lower portion 20* of the gripping member, and caused the nook 19 to engage the pin 17. When the hook 20 has engaged the pin 18, the energizing oil the winding 30. will cause the actuating member 22 to more downward, carrying with it the gripping member 21, which will cause the rock arm 16 to turn toward-the left, placing the spring 14- under tension in the opposite direction, the shaft 6 and the switch airlns 9 and 10 being meanwhile prevented from movement by the engagement of the detent 24 with the right hand vertical face of the restraining plate 93. When the restraining plate 23 has reached its lowermost position, the detent 24- will move over the top of the plate 23 in a direction from right to left, to gether with the shaft 6 and the switch arms connected thereto under the impulse of the spring 14-. hen the actuatingmembcr is again returned to normal position by the spring 34, the pin 18 will engage the lower surface 20" of the gripping member and tip it toward the left untilthe hook it) engages the pin 17, as shown in Fig. 3.

Fig. 8 shows the switch mechanism above described connected to circuits so as to emover the top of the restraining plate. time the shaft 6 and the l i f l l l l 1 l body my invention in a double-"pole switch. in this figure, A.-B are branches of a circuit supplying translating devices, L-L. i a source of current. The winding 30 has one terminal permanently connected to the source of currentat a point on the generator side of the switch. Its other terminal is connected to contacts E-Ff of local circuit controllers FF. The second contact G of the local controller F is permanently connected by the conductor 9 to the main A. The second contact G of the local controller F is connected by the conductor 9 to the contact 38, and through the switch arm 9 when the main circuit is open to the contact 37, whiph is permanently connected to the main A.; The circuit bctween the contact G and the main A is therefore opened and. closed according to the position of the switch arm 9. The local. controllers FF have pilish buttons H-l:l,i

gether by a pivoted lever l, which is normally held by a spring J in a position such that there is no electrical connection between the contacts E and G or E and G. When the main switch is closed, pushing the button H so as the contacts I) and (1 produces no result, since the local circuit in which these contacts are situated is broken at the switch arm 9. If, however, the button H is pushed, the contacts E cally connected and the circuit is completed through the coil 30. This pulls down the actuating member 22 carrying the grab hook 91, causing the rocking lever to turn in a direction to open the switch. as the switch opens, the circuit through the coil 30 is broken at the switch arm 9 and the coil becomes deenergized, permitting the actuating member to return to normal position as sooiras the detent has passed across its upper end. A subsequent push of the button H produces no result, since the circuit through the coil is now broken at the switch arm 9. The throwing of the switch mechanism not only actuated the switch arm 9, but also actuated the arm 10 so as to cause it to disengage the contacts 39-39, thus interrupting at two pointsthe circuit between the translatin devices and the source. 'The movement also brings arm 9 into engagement with contacts 37 38, completing a conducting path between the contacts E, G. When, therefore, the button H is pushed, with the switch arm .9 in open position, a local circuit is completed through the coil 30, again actuating the switch mech anism, the arm 9 being in engagement with the contacts 37 and 38. The grab hook 21 engages the rocking member so as to cause it to rotate in the opposite direction, and thus throws the switch mechanism in the opposite direction, causing it to open the to electrically connect and G are electri As soon.

ilie coniac switch n'iechaz'iisin may also he controlled than w ujillSZlC' push buttons he provided conn c. vely to the eonduo tors leading our the conlec'ls l5 and (i and adapted L0 be aloseil whenlhe hell; of a door lock is ihrown. being situated the door jainh for that purpose. 'l"

byv other means t th e r l. i

The U. of 11s is that if the switch arms 9 and Lu are in closed position. and door the room is locked. as to throw the bolt, the coil will he energized so es to open the switch. .ln case the. main six-itch is open and the bolt. M. is so thrown, no effect-is produced since 'the circuit which would otherwise he made through the coil 30 is open at the switch arrn 9. Moreover, the conductors, connected "to the contacts l1) and 6%", may also he connected to conta N and N controlled by a co tact: 0 carried a core O or a solenoid 1 which connected to one oi the mains or ill. so as to he in series with the lamps i. ll lll S\ltCll arms 9 and 1.0 are then in closed position, and for any reason the circuit. becomes over loaded by reason of anythinq which takes place on the translating device side oil-the switch, the soleiniid core will lifted so that the contact. C (JYREIHQQS the contacts N and ll, thus completing the llie coil and operating; the switch RIICCl1- nnisni to throw the switch wins 9 and ii) to open position. There may be a plurality of local circuit controllers such as F S? connected in multiple at various points, usindioatcd at F l, so that the switch mechanism can be controlled from any desired number or points lay the of simple tortrolling; circuits andlocal circuit controllers. The switch mechanism may also he cont rolled by a time mechanism, ill (licalcd at Q. in which clockwork rotates a switch arm ll electrically connected to the outs-aide terminal of the winding 30 and gida' the Contact. ll." connectconnected to the circuit g These contacts R and ll can be located in. any position. ll the suilch is open when the arin'll en gages the contact ll, it will he automatically closed. ll it. is closed when the arm ll ci'igages the contact R it will he auto 'matlcall x' opened. An extended cont-act B may he connected tothe conductor o through a switch ll so that the switch can not be permanently closed for a considerable time, {lurin which um arm passing over The clockmechanism can )0 entirely out out by the switch. ll, or either part of it by one of the switches ll. 3 ln llie modification shown in Fig". 9, the

some switch mechanism is shown connected to employ both switch arms to prothe same results in a. single pole switch. 's arrangement, the switch arm 9 does I carry the load current and may he con- T of any size that will euahle it to function oil cont-rolling a local cir by engaging the contacts Ell -and 3S lch are connected to the circuit so as to in series with the local controller Fwhen engaged by the switch arm 9. 3e and are idle, and may if desired, be omitted. lhe result of this that when the switch open the coil 30 can he energized so as to throw the switch mechanisn'rclosed by pushing the button of the controller F, but cannot; becil'ec-ted by that push button after the switch is closed, since the circuitbet'v'een the contact G and the source is interrupted at. the contact hen the switch is closed, the coil can be energized by pushing the button F, and when so cner' gised the switch will be opened. When. however. the. switch is open, pushing the button ll" produces no effect thereon since the circuit between the contact G and the source is interrupted by the disengagementol the switch arm 10 with the contacts 39. In this simple manner, the proper open circuiting of the controlling circuits is obllllllflfl with single pole switch. In this form, one terminal of thewvinding 30, here shown with its two parts in multiple; is connected to the main A, and the local controlling circuits are connected to'the main ll. The other parts are the same in Fig. 8, with slightly different locations, which, l1OWGVQ1,.ClG not all ect the action or result. The two parts off the solenoid Winding are preferably connected. together so as to be simultaneously energized, the series connecr tion being preferred. When connected they form part of a common conducting path extcnclingctrom the contacts E l l to one of the mains A B.

ln the arrangement shown in Fig. 8, the

i my! du ce switch arm 10 may be omitted and the switch. thus reduced to a single pole switch. Without interfering with its control over the local circuits.

My invention permits of various other modifications which are within its spirit and which will be evident to those skilled in the art.

With. the arrangements shown, the switch mechanisms of a building may he grouped sta central point, such as a panel hour-(L the main and controlling circuits only hei. led to the rooms where the translating devices are located. Various means of control located at various places may be employed,

and the manually actuated controlling means an be lllllllllpllml at little trouble or expense.

W hat I claim is: 1. In a means for controlling electric circults the combination of a switch inecha The contacts nism having :i-switch arm, a pair of main circuit terminals, and a solenoid for actuat mg said switch mechanism to both open and close said circuit, said switch arm being electrically connected to one main circuit ter minal when said circuit is both open and closed and to the other when said circuit is closed only, and a supplemental contact engaged by said switch arm when the main circuit is open only, a local circuit for said solenoid connected to one branch of the main circuit and to the su plemental contact and a local circuit controiler in said local circuit.

2. In a means for controlling electric circuits, the combination ofa switch mechanism luvinga switch arm, a pair ofJnain circuit terminals, and a solenoid for actuating the sameto both open and close said circuit, said switch arm being electrically connected to one main circuit terminal when said circuit is both open and closed and to the other when said circuit is closed only, and a supplcn'iental contact engaged by said arm when the circuit is open only,"a local circuit for said solenoid connected to one branch of the main circuit and tothe supplemental contact and a local circuit controllcr in said local circuit, a second local circuit for saidsolcnoid connected to one branch of the main circuit and to the other branch on the translating device side of said switch, and a local circuit controllcrin said second local circuit.

3. in a means for controlling electric circuits, the combination of a switch mechanism having a switch arm, a pair of main circuit terminals, and a solenoid for actuating the same to both open and close said circuit, said switch arm being electrically connected to one main circuit terminal when said'circuit is both open and closed and to the other when said circuit is closed only, and a supplemental contact engaged by said arm when the circuit is open only, a local circuit for said solenoid connected to one branch of the main circuit and to the supplemental contact and a local circuit controller in said local circuit, a second local circuit for said solenoid connected to one branch of the main circuit and to the other branch on the translating device side of said switch, and a' local circuit controller in said second local circuit, the solenoid winding constitutingla portion of a conducting path common to both of said local circuits.

4. In means for controlling electric circuits, the combination of a double pole switch mechanism having two switch-arms,

a plurality of pairs of nmin-circhit contacts engaged by said switch-arms when in closed position, a solenoid for actuating said switch to both open and close the same, one switcharm of said switch mechanism being electrically connected to one of a pair of said main circuit contacts when in both open and closed position, a supplemental contact engaged by said switch-arm when in open position, a local circuit for said solenoid having one terminal connected to one of the mains on the generator side of said switch mechanism, and the other connected to said supplemental contact, and a local circuit controller in said local circuit.

5. In means for controlling an electric circuit, the combination of a' switch mocha;- nism for controlling a main circuit, a solenoid for actuating said switch mechanism, two local circuits in relative multiple relation to each other, one connected to one branch of said main circuit on the translating device side of said switch, and the other connected to said branch through said switch mechanism when in open position, local circuit controllers in said local circuits, and means whereby said switch mechanism interrupts said last mentioned local circuit when the switch is closed, said solenoid being connectedv across the branches of said main circuit and in series with (moot said multiple local circuits when the main circuit is opened and the other when it isclosed 6. in means for controlling an clccl :ir-- cuit, a switch having two switch arms ineehanically connected together, quick acting means for actuating thev snare, and a pair oi stationary contacts for each switch :zrm adapted to engage the opposite ends illt 'HOf, one pair of contacts beingdispiace' relatively to its arm so as to be out oi engagement therewith when the other arm is i lIl engagement with its pair of contacts and vice versa, in combination with an actiuil'ing solenoid, two normally open local circuits for said solenoid, said normally open local circuits each having an additional break coir trolled by the switch so that one ol said, breaks is opened and the other closed by the n'iov'cment thereofwlicncvcr citlicr l-Kffil circuit is closed so as to actuate said switch and normally open local circuit coulrmlcrs in said local circuits respectively.

GERALD \V. HART.

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