US1706114A - Switch truck panel - Google Patents

Description

March 19, 1929.

J. GORDON SWITCH TRUCK PANEL Filed July 27, 1925 In ventor JuLLus Gordon BY HLS Attorney Patented Mar. 1 9, 1929.

UNITED STATES PATENT OFFlCE.

- JULIUS GORDON, or sco'rm, NEW YORK, ASSIGNOR To GENERAL ELECTRIC comm,

A CORPORATION OI NEW YORK.

swncn 'rnuck PANEL.

Application filed July 27, 1825-. Serial No. 46,266.

5 switches include an oil switch for opening an incoming-three-phase circuit supported and closing a-circuit under load and an isolating switch whose contacts are separated when the truck is withdrawn from 1ts enclosing housing. While the circult or cir- 'cuits controlled by the switch may be rendered dead by opening the oil switch and in addition by partially Withdrawing the truck panel to open the isolating swltch contacts, a workman handling the controlled circults or apparatus connected therewith feels a greater sense of security if he can personally lock the truck panel and the oil switch in open circuit position to prevent by any possibility the circuit being inadvertently closed by another at this point An object of my invention therefore is .theprovision of 1mproved m ns whereby this result may be obtaine T My invention will be better understood ried by the truck panel is completely "isolated from the incoming and the outgoing lines and these lines are also completely isolated from each other.

Means have been provided heretofore for locking the truck' panel in its full-in position as shown by Fig. 3, which means comprises plates 11 secured at each side of the housing and having the stops 12 provided with the inclined faces 13. I have rovided an additional locking means fort e truck panel whereby it may be locked in a partially withdrawn or disengaged position as shown in Fig. 4, in which position the above described isolating contacts are separated.

This means comprises the stops 14 on the plates 11' and the gravity actuated pawls 15 pivoted to the plates 11 at 16 intermediate the stops 12 and 14. The cross rod 17 is attached by links 18 toangle irons 19 forming a part of the truck-panel 2 and are maintained in the elevated position illustrated by Fig. 1 by means of the springs 20 which enfrom the following description taken in connection with the accompanying drawing, and its scope will be pointed out in the appended claims. I I

Referring to the drawing, Fig. 1 is a' perspective view of the locking mechanism of a truck type switch panel lllustratlng my invention; Fig. 2 is similar to Fig. 1 showing a portion of the mechanism only and with the panel partially withdrawn; and Figs. 3 and 4 are side elevations of the housing and truck panel with the panel respectively pushed in and partlally wlthdrawn from the housing.

The housing 1 which encloses the truck panel 2 has the three busses A, B and C of at the rear b suitable insulators 3 arranged vertically. ocket connectors 4 carried by the insulators and in electrical connection with the respective busses are adapted to receive the plug connectors 5 of the truck panel. Arranged horizontally and below the socket connectors 4 are three similar socket connectors 6 carried by insulators 7 and adapted to receive plug connectors 8 of the truck panel. Each socket connector 6 has connected therewith a cable terminal 9 to which an outgoing cable 10 is secured. The above described contacts constitute isolating switches by which the apparatus carcircle the guide rods 21 and bear against blocks 22 pivoted to the links 18. The handle 24 is pivoted to brackets 25 on the inner side of the truck panel and to these brackets also are pivoted the links 26 which are notched to receive the rod 17 and which are actuated by the handle 24. Arms 27 operatively connected with a circuit breaker (not shown) carried by the truck panel have Slotted ends in which moves a pin 28 secured to the links 26. When the links are down the breaker is open. In movin the breaker to closed position, the arms 2 may move upward by reason of the pin and slot connection at their upper ends.

With the truck panel and the locking mechanism in the position shown in Figs. 1 and 3 the panel can not be withdrawn, being locked inthe housing by reason of the ends of the locking bar engaging the stops 12. To remove the truck panel completely the handle '24 is pushed upwardly, throwing the cross rod 17 down a sufficient amount to clear the stops 12 as the truck is slightly withdrawn. The handle being then released, the rod passes over the top of stops 14. This unlocking movement of the cross rod 17 is possible only under the condition that the circuit breaker is already open, as otherwise the arms 27 will be raised and will prevent downward movement of the rod 17.

When work is to be done on the outgoing lines 10 or on apparatus connected there with and it is deemed to take every possible precaution against the accidental energlzation of the circuit concerned, an attendant or the workman himself may partially withdraw the truck panel by first throwing the handle 24 to its upper position and looking it there by inserting a pin or the how of the padlock 30 in alinmg holes in the handle and an arm 31 on the truck panel. In its lowered position the cross arm will rock the awls 15 as it passes 'by and be arreste d by engagement with the sto s 14, the pawl being reset by gravity. he truck panel is now locked against movement in either direction, further withdrawal being prevented by the stops 14 and return movement being prevented by the pawls 15. In this position the contacts at the rear of the panel are all disconnected; Until the pin 'or padlock is removed the truck panel can not be pushed-in to cause the contacts to en gage, nor can it be removed to permit the insertion of another truck. The projecting truck panel, moreover, indicates that work is being done on the circuit controlled thereby. To completely remove the truck panel, the handle is first thrown up and then down, causing the cross rod to successively clear stops 12 and 14 as the panel is withdrawn. When the truck panel is pushed into the housing no operatlon of the handle is necessary as the cross rod will be automatically depressed by riding on the inclined faces 13 of stops 12.

While I have described only one embodiment of my invention, I do not wish to be limited to the particular form shown and described as it will be apparent that modifications therein may be made Without departing from the scope of my invention as set forth in the appended claims.

What I claim as new and desire to secure by Letters Patent of the United States is:

1. An electric switch comprising a housing, a truck panel arranged for relative movement in'said housing, cooperating contacts carried by the housing and the truck panel arranged to engage each other when the truck panel is in its full-in position, and locking means comprising cooperating members on the housing and truck panel constructed to come into locking engagement when the truck panel is withdrawn to a predetermined position at which the contacts are separated for preventing further withdrawal of the truck panel. or a return thereof to its original position, a

2. In an electric switch of the truck panel type havin coo erating contacts on the housing an true panel, the combination with a locking member adapted in one position thereof to secure the truck panel in the housing with the contacts in closed circuit position, of meansadapted to cooperate with said member in another position thereof to secure the truck drawn position with the contacts separated.

- 3. In an electric switch of the truck panel type having cooperating contacts on the housing and the truck panel which are adapted to engage when the panel is completely within the housing and which disengage when the truck panel is moved to a partially withdrawn position, locking members effective when the truck panel reaches said plosition to prevent movement thereof in eit er direction.

' 4. In an electric switch of the truck panel type having cooperating contacts carried by the housing and the truck panel and having cooperating locking members for securing the truck panel completely within the housing and with the contacts in engagement, means for locking one of said members in a position out of engagement with the other, and means effective upon the outward movement of the truck panel to a position at which said contacts are separated for preventing the return movement of the truck panel.

5. In an electric switch of the truck panel type having cooperating contacts carried by the housing and the truck panel and a locking cross rod on the truck panel, a stop on the housing, means for locking the cross rod in a position to engage the stop when the truck panel has been withdrawn to a position where the contacts are separated and a pawl on the housing adapted to engage the crossrod to prevent the return movement of the truck panel.

In witness whereof, I have hereunto set my hand this 25th day of July 1925.

JULIUS GORDON.

panel in a partially with

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