US729934A - Automatic paralleling device. - Google Patents

Description

No. 729,934. PATENTED JUNE 2, 1903.

B. M. HEMPHILL & E. BEIBER. AUTOMATIC PARALLELING DEVICE.

APPLICATION IILED DBO.24,1902.

HO MODEL.

' UNITED STATES Patented Juries, 1903.

PATENT OFFICE.

ELI M. HEMPHILL, OF AVALON, AND EDWARD BEIBER, OF PITTSBURG,

PENNSYLVANIA.

AUTOMATIC PARALLELING DEVICE.

SPECIFICATION forming part of Letters Patent N 0. 729,934, dated June 2, '1903.

. Application filed December 24, 1902. Serial No. 186,444. (No model.)

To all whom, it may concern:

Be it known that we, ELI M. HEMPHILL, residing at Avalon, and EDWARD BEIBER, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, citizens of the United States of America, have invented certain new and useful Improvements in Automatic Paralleling Devices, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in automatic paralleling devices, and has for its object the provision of means whereby two alternating-current generators adapted to run in parallel are automatically placed in parallel as soon as the generators are in step or synchronism. Heretofore and before our invention this has generally been done by the use of two or more lamps connected between the transformers and termed synchronizing-lamps. lVith such a system it is necessary that these lamps be watched by a man at the board until they go out entirely, and the operator then throws in the switch. Thus it requires the service of two men, one at the switch to observe the synchronizing-lamps and one at the engine to vary the speed. By the aid of our invention it requires no operator or watcher at the board, as the switch is automatically thrown in as soon as the generators are in step or synchronism.

In describing the invention in detail reference is had to the accompanying drawings, forming a part of this specification,and wherein like numerals of reference indicate like parts throughout the several views,in which- Figure 1 is a diagrammatical view showing the circuits to the transformers and switch. Fig. 2 is a plan view of the indicator, which is located at the engine (not shown) with the front plate or dial removed. Fig. 3 is a horizontal sectional view of the same. Fig. 4t is a front elevation thereof. Fig. 5 is a detached detail perspective view of the switch and perating-magnet. Fig. 6 is a sectional view of a part of the indicating-mechanism magnet or solenoid, showing the mercury-cup and the segment mechanism.

Our device embodies a solenoid located at the engine and in circuit with a small magnet located at the switchboard and also in circuit with the transformers, and an indicatingpointer is mounted adjacent to this solenoid and controlled thereby. We preferably arrange the mechanism at the engine within a suitable casing, and though this is not essential we have so shown and will describe the same. To this end we have shown the solenoid 1 arranged in a circular casing 2, which latter may be mounted in any suitable manner at a desired'point on or near the engine. (Not shown.) To the inner face of the back plate of this casing is attached a f rame-bar 3, connected to a front frame-bar 4 by arbors 5, 6, and 7, respectively. The arbor or shaft has mounted thereon a segment 8, provided with a threaded shank 9, on which is mounted a regulating-weight 10. A link 11 connects the segment 8 to the core or armature 12 of solenoid 1. The'toothed segment 8 meshes with a pinionl i, mounted on the arbor or shaft 6, which arbor or shaft carries a contact 15, adapted to make contact with a mercury-cup 16, whereby to complete the circuit and operate the switch when the generators are in step or synchronism. This mercurycup 16 is supported by and insulated from the arbor or shaft 7, and the throw of the arbor or shaft 6 is limited by a stop 17, carried by the arbor or shaft 6. The arbor or shaft 6 extends through the front frame-bar 4E and has mounted on its forward end an indicating-pointer 18, provided with an adjustable weight 19. Circuit-wires 20 21 connect from binding-posts 22 23 on the casing 2 through the synchronizing-lamps 24 with the trans formers 25, connected to the machines to be synchronized, respectively, these bindingposts being connected by wires 25 26 with binding-posts 27 28, to which the windings ot' the solenoid 1 are connected.

On the switchboard 29 is mounted supporting-posts 30, in which is pivoted an armature 31, the upper end of which has acatch 32 to engage with a plate 33,0arried by the switch 34, which is connected in the main circuit leading from the generators. This switch is pivoted in a clip 35, carried by the switch board 29, and when the catch end of the armature is released from the plate 33 a spring 35 forces the switch up into engagement with roe the clips 36, which is connected in the main. circuit, leading off the current from the generators. This spring we preferably make in the form of a yoke, as shown, coiling the same near its ends and inserting the ends through keepers. Located below the supports 30 is a magnet 37 in circuit with the exciter or generator through wires 38 39, connected to binding-posts 4O 41. These binding-posts are con-.

nected, respectively, by wires 42 to the rear bar 3 of the frame and by wire 43 to a switch 44. The contact 15 is'thus electrically connected to wire 42 through the frame.- The contact 45 of this switch is adapted to engage when the switch is closed with a contact 46, this contact46 being connected by wire 47 with the mercury-cup 16. The switch-handle 44 carries the indicating-signs On and Off,

and the front plate of the casing is provided with an aperture 48, so that said indicatingsigns may be observed to indicate or denote the position of the switch. The upper part' or portion of the front plate of the casingis made of transparent material, and an indi-; eating-scale 49 is preferably provided to indicate the amount of current.

In operation when the switch-handle 44 is off orin the position shown in Fig. 1 the currentl indicating the advance of one genorator over the other flowing through the transformers 25 and the wires 20 21 will energize the magnet 1 and. draw inward its core, which will in turn cause the pointer 18 to rise, and the vibrations of this pointer will' indicate, approaching synchronism of the' generators driven by said engines. As the pointer indicates the approaching synchronism the engineer throws switch-handle so as to move contact 45 in engagementwith contact 46 and as the contact 15 engages in the mercury-cup 16 and completes the circuit through Wires 42 43 wires 38 39 to energize the magnet 37 and attract armature 31, thereby releasing switch 34 and allowing spring 35 to force said switch into engagement with its clip 36 to close the satne, thereby throwing the current of the generators into the same circuit.

In order to cushion the armature or core 12, we preferably provide a spring 50, carried on a disk 5, which latter is mounted on a screw 52 in the lower end of solenoid 1.

To operate by hand, the operator will simply throw in the switch when pointer 18 comes to rest.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is 7V 1. A device of the type set forth comprising in combination with transformers adapted to be connected with generators to be synchronized, synchronizing-lamps connected to the transformers, a solenoid electrically connected with said lamps, means secured to the core of said solenoid for establishing a circuit to actuate a main switch upon the synchronizing of the generators, indicating means connected therewith, and a main switch adapted to close the circuit between the generators, substantially as described. i

2. A device of the character described, comprising a main switch, a circuit for leading off the current of two synchronized generators controlled thereby, an electrically actuated means for actuatingsaid switch, a circuit leading from said means, a switch for :said lastnamed circuit, means forcompleting said circuit on the synchronizing of the generators comprising a mercury-cnp connected in said circuit, a pivoted contact-piece therefor carrying a pinion, a pivoted arm carrying a segment meshing with said pinion, a solenoi d, a core therefor secured to said pivoted arm, adapted to actuate the saute, synchronizinglatnps electrically connected with the solenoid, and with transformers, said transformers being connected with the generators, and means actuated by the solenoid-core for indicating approaching synchronizing of the generators, substantially as described.

A device of the type set forth comprising in circuit with transformers, synchronizinglamps, a solenoid connected therewith, means actuated by the core thereof to complete a second circuit, means for indicating synchronism actuated thereby, a switch for the second circuit, a main switch adapted to be actuated upon the closing of said last-named circuit, and a circuit adapted to conduct off the current from the synchronized generators, upon the closing of the said main switch, substantially as described.

In testimory whereof we aflix our signatures in the presence of two witnesses.

ELI M. I-IEMPHILL. EDWARD BEIBER.

W'itnesses:

A. M. WILSON, E. E. POTTER.

ICO

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