US851691A - Electric switch mechanism. - Google Patents

Description

No. 851,691. PATENTED APB 50 1907.

f C. NEWELL.

ELECTRIC SWITCH MECHANISM. APPLICATION FILED AUG. 2, 1905.

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wimisssss 4 SHEETS-SHEET 24 PATENTED APR. 30, 1907.

F. C. NEWBLL. ELECTRIC SWITCH MEGHANISM.

APPLICATION FILED AUG. 2, 1905.

Att' y.

PATBNTED APR. 30, 1907.

P. C. NEW'ELL. ELECTRIC SWITCH MECHANISM.

APPLICATION FILED AUG. 2, 1905` 4 SHEETS-SHEET 3.

32H5/WM 2%@ f P. C. NEWBLL.

ELECTRIC SWITCH MECHANISM. APPLIUATIQH FILI-:D AUG. 2, 1905.

PATBNTED APR. 30, 1907.

4 SHEETS-SHEET 4.

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.iNGHoUsEAiR Baai/m COMPANY, or riTTsBUac, PENNSYLVANIA, n eoRP-onATroN or rENNsYLvANiA.

ELECTRIC `SWETCH NlECHANiSNl.

Specification of Letters Patent. Patented April 80, 1907.

Application ned August 2, i905". sean No. 272,373.

Figure 4 is a plan viewlooking down on the magnet and switch terminals, and

Figure 5 is a diagram of the electrical circuits employed.

Referring now ures 1 to 4 inclusive, it will be seen that I have provided a main barrel or casing 6 having within its lower part a main spring 7 which operates upon a movable plunger 8 against a diaphragm device 9 that is exposed on its underside to fluid pressure through thepassage 10.

Wi thin the plunger 8 extending upwardly from the diaphragm 9 is a central rod 11 surrounded by a spring v12 employedfor the purpose of varying the range of the apparatus, and. at the upper end of the rod 11 is a T-bar 13 securely attached to suchrod so as to move therewith, and having below it a movablevhead or cross bar 14 which is slidably mounted upon the rod as shown, and held in relative position by means of the guide pins 15. The tension on the range varying spring 12 is adjusted by a range adjusting nut 16 which may be readily varied to suitthe requirements The tension on the main spring 7 may lie regulated by the main spring adjusting nut 17 provided with openings 18 for the applitation ot a Spanner Wrench thereto, such uadjusting nut 17 having engagement iyithtlie barrel o as shown.

Upon the axles 1Q' and 20 are mounted two coils, such coils being carried in spools marked respectively 21 and 22 (see Figure 3). The coils or spools are provided with magnetic projections 23 and 24 as shown in Figure 1, which on the oscillation or rotation of the j spools about their axles are adapted to come into'the position shown in Figure 1 where the l adjoining Jfaces of the projections 23 and Z4 l, are nearlyfbut not altogether in Contact. i Within the projections Z3 and 24, as indi- I cated in Figure 4. there Aare secured pieces of l, insulation marked respectively Z5 and 26 l, (see Figure 4), such insulated pieces carrying l l l l ucrgZtu71o1fn t nfl/ay "concern: Beitglgnownthat I, FRANK C. N EWELL, a citizen othefUnited States, residing at Wilipsbnrg-ingthe county oi AlleghenyT and p5 state, 'l-ennsylvania', have invented certain gagnante-,glad useful Improvements in Electric vyitch`/Mechanism, of which the following is a specification.

y,My invention has reference to certain improvements in electric switch mechanism y chas-'may beused for example in conjuncftf tion with, luid pressure Adevices for regulating the-supplyror quantity of fluid, .and is particulaydesigned for yservice in conjunction ML, [f5 lfit/li a? pump governor for controlling the acgg-tionof-an electrically driven pressure pump imsgich as isusedin air brake practice on many -aast-reet railway lines.

{ft-The iirst of the objects of this present in- Yzo vent-ion is` the provision of an l improved l mechanism of thecharacter specified in which fthe action ofthe main circuit terminals will be etlectively subject to control by the move- (ment of parts directly governed by the presl 2 5 `sure supply opposed to a spring under adzjustabletension, and to the combination ol' a certain arrangement of main circuit termi-- nalswith electro-magnetic means to aid in Abringing the terminals together and holding 3o them so with yielding forceand theelectro- I magnetic means for magnetically driving-the. v.,terminals. apartI and breaking'the circuit. A j further object of the invention is the combij j nationwith the main circuit terminals dej 35,scribed, of a certain arrangement of repuli jlsionfzterminals employed in conjunction j Q' therewith and with a repulsion coil for invducing the repellent' magnetization which k trates the terminals, all of which will ,4c hereinafter be more particularly described.A carrying out my invention I have em- ,Leithe Same in preferred form in a constructionillustrated in the accompanying Y, Uniting, wherein- Figure-1i is a vertical section through the apparatus, showing theaction of the fluid Wprssnre devices in conjunction -with the l 'aswitclix mechanism 5 ,Figurei- 2-is a' view showing the switch 'tgogp techanism proper, with the luid pressure n li'wzdelvi,ccsremoved;

v Figure 3,;.is a sectional view showing the i magnet arrangement;

copper terminals 27 and 2S, which are the contacting terminals for the main circuit,

The terminal 28 isv mounted so as to move motion ot rotation about its axle pin 19 (see ried upon a lever from a Julcrum point 29 about which .it moves, and has a slight range more particularly to Figwith the spool 21 to which it is secured in av Figures 1 and 2), while the terminal 27 is car' ,1, K C. NEWELL, OF WILKINSBURG, PENNSYLVANIA, ASSIGNOR TO'WEST- IOO of motion within the projection of th o o spool 2 as indicated. at the point marked 30. The purpose of this slight lost motionis to permit the main circuit terminals to come together with a kind of wiping action, it being apparent that such result will be produced in the difference iii cent-ers of rotation about which the said terminals 27 and 28 move.

Referring now more particularly to the diagram shown in Figure 5, it will be seen that l have therein indicated a dynamo 31 anda.v translating device 32 in a main circuit 33, having the main circuit terminals which. are the terminals 27 and 2 3 of the apparatus previously described, and in conjunction with suoli parts l have provided a shunt resistance 34 'wid ch having a movable contact connection35, and the coils mounted respectively on spools 22 and 21, which coils are marked 36 and 37, 36 .beingthe attracting coil and 37 being what i call the repulsion coil. Extending from one 'terminal of the coil 35 is a lead which i have marked 33, which in conjunction with the lead marked 39 which extends from a terminal of the coil 37 forms what l have called repulsion terminals, the purpose oi' these terminals being when they come in contact to close the circuit in the' repulsion coil Iand to produce like magnetization of the magnetic poles ci' the device and forcibly drive the main circuitterininals 27 and apart, thus breaking the circuits and dissipating the arc, at the'sanie time .having the eiiect by means of the wiring shown in the diagram of breaking the circuit in the repulsion coil, leaving thewiring dead. rllhe'ti'anslating device 32 is in driving connection with the pump 45, which supplies the air reservoir 46, by means ofthe pipe 47. From this reservoir a pipe 48 leads t'o the diaphragm i).

By reference todligure 1 it will be seen that the repulsion terminals' 38 land 39 are carried in blocks shown at 40, which are independently movable about the axles/19 and 20, and the ends oi the terminals are so arranged that when they come together, oscillating as they do aboutdii'l'erent centers, they' will contact` with a kind oi wiping motion to keep the contacts bright. I y

`lteiierring tos'figures 1 and 3 it will be seen that between the il-bar i3 and the movable head 14 there are providedsecured respectively to each of the coils, a couple of pins 41, while engaging the outer end or the T-bar at each side of the device there are a couple of additional pins-42 which serve as a means for 4imparting the motion of the T-bai to the repulsion terminals by engagement of the said pins 42 with tlie movable blocks 40 on which said repulsion. terminals are mounted.

The o 'ation oi: my device will be understooo acciai examination oi' Figure 1, in

seen that the 'air pressure the openin 10 and bearing ni device Q will act in opposition to the main spring 7 and tend to push upwardly on the central rod 11, moving with it the T-bar 13 and imparting pressure to the movable head 14, due tothe upward pressure against the range varying spring 12. This pressure upon the movable head 14 and pin41 will act in a direction to impart rotative movement to the two spools in a direction to separate the main circuit terminals 27 and 28, 'out such main circuit terminals while current is iioiving will be held together by magnetic attraction caused through current flowing through ,attraction coil 36, which, has the efl'ect of holding said mainy terminals together by the magnetization of the projections 23 and 24 against the resistance obtained by compression of the spring 12 through upward movement ofthe diaphragm. Until such time as the upward movement of the diaphragm through the T-bar13 .has produced the rotation of -the blocks 4l) carrying the repulsion' terminals 33 and 39 until the latter have come in contact withthe wiping motion as described,` and. the lcurrent then flows through the repulsion coil the magnetic terminals or projections 23 and 24, and forcibly drives them apart, aiding the action of the spring 12 which has been placed under'tension by thefluid pressure. l

After the circuit is broken and the pump has stopped the accumulation of pressure, the pressure reduces gradually, causing the diaphragm to travel downward The diaphragm carries with it Vthe'bar 13, thus separating the repulsion terminals and gradually Abringing the main circuit terminals 27 and 2S together until they' make contact, when 'the current will ilow as shown in thediagram, downward and be divided, part of it the attraction coil 36 I'may provideth-e ter- 35 with means for moving it to diferminal ent parts of the shunt resistance 34, so as to vary the amount of current which will travel through said shunt resistance, and to cause the attracting coil to take the larger or smaller proportion, as the conditions of service may require. i can get vsubstantially similar re- 4siilts by inserting diil'erent shunt resistances 34, having varying amounts of resistance, this making it possible to apply the apparatus to various classes of service without the' necessity of changing the windings in the attraction or repulsion coils. This shunt re'- sistaiice is indicated clearly in Figure 2' as weh as inthe diagrammatic Figure 5.

its soon as the terminals 27 and '28 come in i Contact, current flowing through the attrae ing coils produces magnetization effect on IIO IIS

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e c oil 36-,jwhi`ch forcibly pulls such main circuit terminals still closer together, allow-- 'illustrated its use, what I claim as new 'and 'desire to secureby Letters Patent, is the iol-- 'lcw1ng`: f' v l'. The combination in switch mechanism ci a pair of separable contact terminals having magnetizable parts, an energizing winding, means including-a switch whereby vthe current through the` winding may be governed so that the terminals will either repel each other to break the circuit or attract each other tc close such circuit and YHuid operatednieans adapted togoperate the said switch. :j I

.2. The combination switchmechanisni ci a pair of separable contact teririna'ls having magnetiZableparts, an energizing winding, means includingv a switch whercby the.

cu'rrent .through the` winding may be gov'- erned so that the'terminals will either repel each other to break the circuit er attract each otherto close suchcircuit 'and spring means for laccelerating the'. opening ci" the terminals.;v j

3. The combination in switch mechanism oi a pair of separable contact terminals havmagiietizable parts., an energizing winding, means includinga switch whereby the current'4 through the winding may be governed so that the terminals will either repel eachother to break vthe circuit or attract each other to .close such circuit, a spring for accelerating theopening of the terminals and means adapted to place the spring under tension during the closing of the switch.

4, The i combination in. switch mechanism et a pair of separable contact terminalslgiaving magneti'zable parts, an energizing winding, means including a switch whereby the current throughthe winding may be gov-n erned so that the terminals will either repel p each other to break the circuit or attract ii ii yeach otherto close such circuit, an operating member having a spring connection with the `terminals and asecond connection with the l switch so arranged that yielding pressure may be applied to'the terminal members tending to separate them before the switch is closed. '5. The combination in switch mechanism oi a pair of separable contact terminals having magnetizable parts, anenergizing winding, means including a switch whereby the current through the winding may be gov- 'erned so that the terminals willeither repel each other to break the circuit or attract them. A

6. rlhe combination in switch mechanism each other to close such circuit, and means for operating the switch and for applying pressure to the terminals tending to move of a pair of separable contact termina-ls having magnetizable parts, an energizing winding, means including a switch whereby the current through the winding maybe gov-l erned so 'that the terminals will either repel veach other to break the circuit or attract each other to close suchv circuit and means Jfor operating' the switch and for applying yieldingv pressure tending to. separate the contact terminals preliminary to the closing of the switch.

- 7. In combination7 separable contact terminals, eiiergi zing `windings for the termin als,

:means for operating the terminals, yielding `means between the operating means and the terminals, a pair ofcontact members for controlling theenergizing ofthe coils, a con'- nection whereby' the coils are energized to attract when the contact members are separated and means whereby the contact niem-4 bers aremade to engage after the yielding vmeans have been actuated.

8. Incombination, a pair of oscillatory terminals having magnetizable parts, an energizing winding and a pair of oscillatory switch members so arranged that when the switch members are separated the terminals are energized for attraction and y'when in contact tor repulsion, a reciprocatory spring supported means for oscillating the terminals out oi engagement, means for swinging the switch members into' contact and an operating means for moving such last means and the spring supported means `together. 9. in combination, a pair of 'oscillatory terminals having inagnetizable parts, an energizing winding and a pair of oscillatory switch members so arranged that when the switch members are separated the terminals are energized for attraction and when in contact for repulsion, a spring supported yoke having engagement with the "terminals, a second yoke having engagement with the switch members7 and a reciprocatory meinber having engagement with both yokes and adapted on a forward movement to first place the terminal members under a resilient opening pressure and on a further movement cause the engagement of the switch members.

in testimony whereof l have hereunder signed my name in the presence of the two subscribed witnesses.

FRAll'i C. NEW/TELL.

lV-itnesses l F, lt. Giiiriinn, Anciiwonin MAniiN.

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