US1367912A - Safety panel-box - Google Patents

Description

H. F. KRANTZ.

SAFETY PANEL BOX.

APPLICATION FELED FEB. 11. 1919.

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SAFETY PANEL BOX.

APPLICATION FILED FEB. II. l9l9.

Patented Feb. 8,1921.

3 SHEETS-SHEET 2.

H. F. KR ANTZ.

SAFETY PANEL BOX.

APPLICATION FILED FEB-H.19l9.

Patented Feb. 8, 1921.

3 $HEETSSHEET 3.

UNITED STATES PATENT OFFICE.

HUBERT F. KRANTZ, OF BROOKLYN, NEW YORK, ASSIGNOR TO KRANTZ MANUFAC- TURING COMPANY, INC., OF BROOKLYN, NEW YORK, A. CORPORATION OF NEW YORK.

1,367,912. Original application filed April e, 1916,

To all whom itimag concern:

Be it known that I, HUBEn'r F. KRANTZ, residing at Brooklyn, in the county of Kings and State of New ,York, have invented certain new and useful Improvements in Safety Panel-Boxes, of which the following is a specification.

This invention is a division of the invention shown and described in my co-pending application Serial No. 89,350, filed April 6, 1916, and relates to a switch mechanism for controlling electrical circuits, and more particularly to an electro-mechanical means for controlling the operation of the switch.

An object is to provide a safety switch boX, and magnetically operable means to controlthe door lock.

A further object is to provide a safety switch box, and an overload device to control the door lock.

A further; object isto provide'a switch with the door swung into its vertical open mechanism, including a container, and combining, with means to prevent opening of the container while the switch is on, a magnetic control for the switch, and further to provide, in the combination, an auxiliary, key-operable means to. operate the switch.

A further object isto so mount the switch that it is bodily movable into and out of co operative, relation with the magnetic control by movement of the door.

A further object is to provide a magnetic device for effecting off movement of the switch, and to provide a toggle arranged to stand in made position to hold the switch on and to be broken by the magnetic con trol topermit theswitch to move off.

Anotherobject is to provide a switch mechanism adapted to.' operate automaticallyby a change in the load of the circuit, in conjunction with a special key arrangement whereby an unauthorized person may not operate the same, together,v with means affordingthefreest possible inspection of all of the working parts while at tlie saine time insuring that they wjll be deadiidn-ring such periods of inspection or repair; "'1

Other objects will'be in part obvious from the annexed drawings, and in part indicated in connection therewith. by the following analysis ofthis invention.

Specification of Letters Patent.

SAFETY PANEL-BOX.

\ Patented Feb. 8, 1921.

Serial No. 89,350. Divided and this application filed February 11,

1919. Serial No. 276,348.

This invention accordingly consists in the features of construction, combination of parts and in the unique relations of the members and the relative proportioning and disposition thereof, all as more completely outlined herein.

To enable others skilled in the art so fully to comprehend the underlying features hereof that they may embody the same by the numerous modifications in structure and relation contemplated by this invention, drawings depicting a preferred form have been annexed as a part of this disclosure, and in such drawings, like characters of reference denote corresponding parts throughout all the views; of which Figure l is a sectionalside elevation of this mechanism showing parts in full lines in the door-locked close-circuit position of the switch.

Fig. 2 is a top view of this arrangement position.

Fig. 3 is an inverted section with the base of the box removed andlooking upwardly as indicated by the arrowsimarked III in Fig. 1.

The form in which the various elements have been illustrated will suflice to typify the modifications which they may assume.

Thus, A indicates a structure in the nature of a housing or casing adapted normally to obstruct access to the operating elements. Here, this casing assumes the form of ,a box formed of a base 1, the end walls 2 and 3,

' the side walls i and 5 and the stationary'top 6."'This top is provided with a cut-away portion providing an opening 7 for the purpose of affording access to the parts to en- "abl'e' them to be replaced orinspected, This opening is normally closed'by means of a door or cover B arranged to be readily displaced from its closing position as by being "l'iinged at 8 to 'the stationary top. A poran obstructing position, operating as a barrier to prevent the hand from contacting hand.

ed that it will be shifted into a more accessi-- ble position whenever the door is opened, and a convenient manner of doing this is to mount the same directly on said door. Thus, this switch device consists of a frame D, positioned on the cover B by means of studs 12, so that the swinging switch blade or brush F may make contact with the mainline terminal C on the one hand and with the branch-line terminal E on the other This brush F is preferably pivoted as by being clamped to a rocker 13 which swings about a pivot 14. The blade F is of laminated construction, being formed of successive layers of copper sheets. clamped together near their middle by means of rivets 15 and thereby secured to the rocker 13. A

spring 16, tends constantly to throw the switch into its neutral or off position as indicated in dotted lines in Fig. 3, and this movement may be prevented by means of a toggle formed of links (1? and H. Link H swings about the fixed pivot 17 and is connected by means of the moving pivot 18 to the floating link G which in turn is connected at 19 to the rocker 13. The pin 20 serves to limit movement of the toggle in made position. When the toggle is in made position it holds the switch blade flexed against the terminals C and E. The tendency of the resilient blade to unfiex serves to hold the toggle made.

By reason of the resiliency of the blade no difiiculty arises when the switch device is displaced bodily since this construction precludes the necessity of accurate alinement of parts.

The toggle may be broken or erected by means of a special key 29 adapted to be inserted through the key-hole 22 from the exterior of the door B. In breaking the toggle the swinging extremity of the key will impact the shoulder 21 of the link H thereby swinging it anti-clockwise (Fig. 3) over its dead center, and this will then allow the spring 16 to exert itself and throw the toggle into full broken position, as seen by the dotted lines in Fig. 3; thereby moving the switch into its open circuit position. On the other hand, with the parts in off position, the free end of the key may swing against the surface 23 by a reverse movement and restore the toggle to its made position. The angular relation of the shoulders 21 and 23 to each other provide spaced legs, as of a bell-crank upon the link l-I; so that the key is free to play within the space between the legs and is operable to swing the bell-crank in either direction according as the key is turned against one leg or the other.

It will be observed that when the brush F is in the closed circuit position. the door cannot be opened, because the end of the brush adjacent the terminal E lies underneath the lip 24 of the stationary cover which would obstruct its upward rise. lVhen in open circuit position. however. the brush clears said lip and the door may readily be opened. I

The over-load control device, above referred to, includes a solenoid coil K made up of a few turns of heavy copper wire arranged in series with the branch line circuit and the terminal E. A core, or plunger. L. is mounted to slide within the coil K and is connected at its outer end to one end of a lever M. The lever M is pivotally mounted intermediate its ends. as at upon a frame 26 which is stationary within the casing.

Should the current through the coil K become excessive. the core L would be drawn to the right, (Fig. 1) and cause the remaining end, 27, of the lever M to swing to the left against the extension 28 of the link H. swinging the link H about its pivot 17 so as to break the toggle. I

It will be observed, from this construction, that since the switch blade constitutes the door lock, and that since the position of this door lock is controlled by the position of the toggle, the magnetically operable over-load device constitutes also a magnetically operable means to control the door lock.

In this connection it is interesting to note that if the key 29 for operating the toggle should become lost while the door stands locked, yetthe switch blade may be thrown off and the door unlocked by passing an excessive current through the coil K. thus avoiding necessity for destroying or deranging any of the parts of the box or of the switch mechanism. This feature is of importance particularly since to force the door open, in this structure where the switch blade itself is the element resisting the force, is extremely likely at least to result in destroying the switch blade. Itis, of course, to be observed that the toggle in its made position, serves to lock the switch blade in position overlapping the part 24 of the easing, and that this arrangement cannot be destroyed while the toggle remains-made except by injuring, or breaking some element of the device.

The adjacent ends of the parts 27 and 28 are shown beveled. This is to prevent the lever 27 from interfering with the closing of the door and at the same time to insure the bringing of the partf28 into proper cooperative relation with the part 27 when the door is swung closed. It is to be noted that the magnetic control is not movable with the door but that it remains stationary within the casing and that the switch mechanism, which is movable with the door, is adapted to be swung into and out of cooperative relation with the magnetic control by the swinging of the door.

As many changes could be made in this construction without departing from the scope of the invention as defined in the following claims, it is intended that all matter contained in the above description or shown in the accompanying drawings, shall be interpreted as illustrative only and not in a limiting sense. i

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. An electrically operated switch combining a housing having a cover; a key actuated switch blade in said housing; a solenoid for throwing said blade' and means for antomatically locking said door closed when said switch is in its closed circuit position.

2. An organization of the nature disclosed combining a switch mechanism; an electrical device for automatically actuating the same; a structure embodying a displaceable cover for inclosing all current-carrying elements; a lock normally holding said door closed; and a connection for releasing said lock automatically when said device has actuated said mechanisms.

3. A housing; a door hinged to close an opening thereof; a key actuated switch mechanism connected with said door so as to be bodily shifted thereby when said door is displaced; and an electrical device for auto matically actuating said switch mechanism.

4. A housing; a door hinged to close an opening thereof; a switch mechanism connected with said door so as to be bodily shifted thereb when said door is displaced; an electrical evice for automatically actuating said switchmechanism; and a connection holding said door locked until said de vice has operated said switch mechanism.

5. A housing; a door hinged to close an opening thereof; a switch mechanism connected with saiddoor so as to be bodily shifted thereb when said door is displaced;

an electrical evice for automatically actuating said switch mechanism; a connection holding saiddoor locked until said device has operated said switch mechanism; and a detachable key adapted to operate through said door to move said switch mechanism into its closed circuit position.

6. A device of the class described comprising a housing, the housing having a door giving access there1nto,a lock for the door,

magnetically operable means for controlling said lock, and said lock comprising a switch mechanism connected to be moved into on and off positions by said magnetically operable means.

7. A device of the class described comprising a housing, the housing having a door giving access thereinto, a switch mechanism within the housing movable into on and off positions and having a part constituting a lock for the doorwhen the switch mechanism is in on position, and an overload device connected with said switch mechanism and operable to unlock the door upon occasion of an over-load in the circuit.

8. A device of the class described compris ing a housing, the housing having a door giving access thereinto, a switch mechanism within the housing movable into on and off positions and having a part constituting a lock for the door when the switch mechanism is in on position, and an overload device connected with said switch mechanism and operable to move the switch mechanism off and to thereby unlock the door upon occasion of an over-load in the circuit.

9. A device of the class described comprising a housing. the housing having a door giving access thereinto, a switch mechanism within the housing movable into on and off positions and having a part constituting a lock for the door when the switch mechanism is in on position, an overload device connected with said switch mechanism and operable to move the switch mechanism ofi' and to thereby unlock the door upon occasion of an over-load in the circuit, and said switch mechanism comprising also an auxiliary key-operable means for moving said mentioned part.

10. A device of the class described comprising a casing, a switch mechanism within the casing movable into on and off positions, magnetic control means for said switch. mechanism, and means whereby said switch mechanism is mounted to move into and out of cooperative relation withsaid magnetic control means. I I 11., A device of the class described cont prising a casing, a switch mechanism therein movable into on and off positions. an over-load control for said switch mech anism, and means whereby said switch mechanism is mounted to move into and out of cooperative relation with said over-load control. I

. 12. A device of the class described comprising a casing having an opening thereinto a closure member for said opening, a switch mechanism within the casing movable into on and off positions, magnetic control means for said switch mechanism, and means whereby movement of said closure member is adapted to move said .switch mechanism into and out of cooperative relation with said magnetic control means.

13. A device of the class described comprising a casing having an opening thereinto, a closure member for said opening, a switch mechanism within the casing movable into on and off positions. magnetic control means for said switch mechanism, and said switch mechanism being mounted upon said closure member to be moved into and out of cooperative relation with said magnetic control means by movement of said closure member.

14. A device of the class described comprising a switch mechanism including a switch blade movable into 011" and off positions and a toggle connected to stand in made position for holding the switch blade on and to permit movement of the switch blade off when the toggle is broken, and a magnetic control for said toggle.

15. A device of the class described comprising a switch mechanism including a switch blade movable into on and oiV-positions and a toggle connected to stand in made position'for holding the switch blade on and to permit movement of the switch blade off when the toggle is broken, and an over-load control for said toggle.

16. A device of the class described comprising a switch mechanism including a switch blade movable into on and off positions and a toggle connected to stand in made position for holding the switch blade on and to permit movement of the switch blade 01f when the toggle is broken, and

an over-load control having a part operable to break the toggle upon the occasion of an over-load in the circuit.

17. A device of the class described comprising a switch mechanism including a switch blade movable into on and 0H positions and a toggle connected to stand in made position for holding the switch blade on and to permit movement of the switch blade off when the toggle is broken, magnetic control means for the toggle, and means whereby the switch mechanism is mounted to move into and out of cooperative relation with said magnetic control means.

18. A device of the class described comprising a casing having an opening thereinto, a closure member for said opening movable into open and closed positions, a lock for said closure member movable to open and closed positions, a toggle included in said lock movable into made and broken positions, and adapted, when in made position, to hold the lock in closedposition, a switch blade also included in said lock, a contact with which said switch blade cooperates, and an over-load device to control said toggle.

19. A device of the class described comprising a casing, the casing having an opening thereinto, a. closure member for said opening movable into open and closed positions, a switch mechanism within the easing, a switch blade included in said switch mechanism having a part movable into and out of a position serving to retain said closure member closed, a toggle also included in the switch mechanism for so moving the switch blade, a contact with which the switch blade cooperates, and magnetically operable means for actuating the toggle.

20. A device of the class described comprising a casing, the casing having an opening thereinto, a closure member for said opening movable into open and closed positions, a switch mechanism within the casing, a switch blade included in said switch mechanism having a part movable into and out of a position serving to retain said closure member closed, a toggle also included in the switch mechanism and movable into made and broken positions for'so moving the switch blade, a contact with which the switch blade cooperates, means to manually move the toggle into one of its positions,

and magnetically operable means to move the toggle to its other position.

21. A switch mechanism comprising a housing having an opening therein, a movable cover for closing the said opening, a switch member movable to open and to closed position and adapted, when in closed position, to hold the door closed, and electromagnetic means for opening the switch member.

22. A switch mechanism comprising a housing having an opening therein, a movable cover for closing the said opening, a switch member movable to open and to closed position and adapted, when in closed position, to hold the door closed, key-controlled means for manually operating the switch and for holding the switch member in closed position, and electro-magnetic means for operating the said key-controlled means whereby the switch is moved to open position.

23. A switch mechanism comprising a housing having an opening therein, a movable cover for closing the said opening, a switch member movable to open and to closed position and adapted, when in closed position, to hold the door closed, key-controlled means for manual-1y operating the switch and for holding the switch member in closed position, and electro-magnetic means for opening the switch.

24. A switch mechanism comprising a housing having an opening therein, amovable cover for closing the said openin a switch member movable to open an to closed position and adapted, when in closed position, to hold the door closed, electromagnetic means for opening the said switch member, and manually operable means for operating the switch member independently of the electromagnetic means.

25. The combination with a circuitbreaker mechanism and a housing having a mo 'able cover preventing access to the live elements of the mechanism when in closed position, of a means for electrically operating the said mechanism, and a means for holding the cover closed, said means being ,responsive to the electrically operated means.

26. Switch mechanism comprising a housing having an opening therein, a movable cover for closing the opening, separate current-conducting terminal members, switch mechanism movable to open and to closed position for connecting the terminals and for holding the cover in closed position when the mechanism is in closed position,

and electrically operated means for actuating the switch mechanism.

27. Switch mechanism comprising a housing having an opening therein, a movable,

cover for closing the opening, separate current-conducting terminal members, switch mechanism movable to open and to closed position for connecting the terminals and for holding the cover in closed position when the mechanism is in closed position, and means operated by'current in the circuit controlled by the switch mechanism for actuating the switch mechanism.

In testimony whereof I afiix my signature inthe, presence of two witnesses.

HUBER-T F. KRANTZ.

\Vitnesses S. L. WHITLOCK, J. A. NEWTON.

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