US1324555A - Safety panel-box. - Google Patents

Description

H. F. yKRANTZ.

SAFETY PANEL Box.- APPLYH-JYON FILED SEPT. .V ISIS Patented-Dec. 9,199.

H. F, KRANTZ. 9

SAFETY PANEL BOX. APPLICAUQN man s'EPT. e. 191s. y 1,324,555., Patented Dee. 9,1919. SHEETS-SHEET 2.

The switch mechanism is substantially the f same as that illustrated in the above mentioned patent and copending application, and as more fully shown and described in my Patent Number 1,292,805, dated Jan. 28, 1919. It' comprises a swinging double ended blade 27 adapted to be swungr by the handle 24 for moving its opposite ends into and out of electrical engagement with the main line contacts 23 and the branch line contacts 29.

A toggle 30 is interposed between the handle and the blade adapted to hold the blade on when the toggle is made and to permit the blade to move oft under the impulse of a suitable spring, as 31, when the toggle is broken.

The branch line contacts are mounted upon an insulating base 32 which is fixed to the bottom wall 1 of the box and which also Vcarries suitable fuse clips 33 ttor supporting fuses 34- in association with the branch line contacts and in a position of accessibility when the hinged section 9 ot the front wall is swung open.

The main line contacts 23 are carried upon the under surface of an insulating block 35 which is in turn supported by a bridge piece H which extends .between the side walls 2 near the upper edge of said side walls. The bridge piece H is preferably of sheet metal and is provided with end flanges 3G lying flat against the inner surface ot the side Valls and rigidly connected thereto by suitable rivets or the like` as 3T.

The insulating block 35 may be connected to the bridge piece in any suitable manner and serves as stitening means tor the in termediate portion ot' the bridge piece. The bridge piece t-hus constitutes a. rigid and etlicient brace and reintorcemei'it 'for the side walls capable ot' holding them in a liXed and predetermined position relative to each other so that the screw receiving apertures 18 and 19 of the top wall and oi the brackets 20 properly mate with each other at all times.y The bridge piece prevents any bowing or bending ot' the upper edge. portion ot the side walls out ot' proper relation to each other. which bowing or bending'might be occasioned by inaccuracyv ot manufacture or by rough handling. ln thisI connection it should be noted that duringr manufacture, while the apertures 13 in the main section 8 may, ot course.` readily be spaced a fixed dista-nce 'from cach other, vet the apertures '19 which must mate with the apertures 18 in a. pre-deterniined position accordingto whether or not the side walls stand true and accurate. @ne ot the side walls may be bent inwardly to a slightly greater extent than the other. This would prevent proper mat-incr of the apertures. The bridge piece H, for carrying the main line contacts, however, 1s ot a fixed length may, or may not be and when fixed between. the side walls it positivelyA spaces the apertures 19 so that they correctly mate with the apertures 18o The use of the bridge piece., as a means to support the main line contacts, is very etlecf tive since the bridge piece not only conveniently supports said contacts in a proper position for cooperation with the switch blade but it also, together with the insulating block 35, constitutes a uard member over said contacts att-er the tront wall' has been removed. Accidental engagement of an operatorie hand, after the trent wall has been removed, with the live main line contacts, is thus to a large extent prevented.

In order to increase the safety afforded by the bridge piece to the main line contacts, said contacts preferably have their outer end portions, as 42., 'bent downwardly so as to support the wire terminals 43 in a more protected position.

A plunger 38 is formed as a part of the switch mechanism7 being preferably connected to the heel of the toggle as at 39 so that when the toggle moves on the plunger is while when the toggle This projected outwardly, moves ol-lm the plunger is withdrawn. plunger said latch 'from the switch mechanism inthe saine manner as fully shown and described in connection with my patent and application above referred to, namely, to cause the latch to stand in latching position whenever the switch is on and to cause ott movement ot the switch whenever the latch is unlatched. i c

A semi-circular retaining disk 41 is also provided upon lthe hinged section, or door 9 concentric with the hinge 1G adapted to travel into the path ot movement of the plunger 38 when the door is opened, thus to prevent on"` movement of the switch while the door is opened. in thesame manner as shown and described in my pending application Serial No. 158,957 above referred to.

It will be seen that since the main line contacts areinatixed position in front ot' the blades 27, said blades and contacts, when the switch is on, cooperate to prevent. detachment ot' the front walleven after the screws 12 and 1G have been removed.

lt should be also pointed out that the dangers 11` upon the two sections ot the liront wall serve to prevent any shitting of the front wall with respect te the remainder of cooperates with a link t() which is connected with the latch 21 tor operating.

co'nstructioriljy without departing from the scope ofthd'ginvention as defined in the following claims, it is intended that all matter containedv in the above description or shown in the accompanying drawings, shall be interpietedas illustrative only and not in a limiting sense.

Having thus described my invention, what l claim as new and desire to secure by Letters Patent is A device of the class described comprising a box having opposite side and end walls and having a removable front wall,

removable retaining means interengaging between the front wall and the opposite side walls to retain the front wallI in position, stiifening means'for said side walls extending therebetween adjacent' said retaining means for the purpose described, and said stiening means-beingof a character to suping carried and supported by said brace.

3. A panel box comprising opposite side walls spaced apart, a front wall, retaining means for the front' wall interengaging between the front wall and Said opposite side walls, switch mechanism within the box, a contact within 4the box for coperating with the switch mechanism, and means for said contact of a character to hold said side walls in position to facilitate application of said front wall retaining means.

4. A panel box comprising opposite side walls spaced apart, a front wall, switch mechanism within thebx, the front wall havin apertures formed therethrolgh and the side walls having parts providing apertures intended to mate the a'peituresof the front wall whereby to receive retaining vmeans for the iront wall through.s aid mating apertures, switch mechanism within thebox, a contact with which the switch mechanism coperates, and a support for said coni tact comprising means to retain the side walls in position with said apertures mating. 5. A panel box comprising a piece of sheet material bent into il cross section to provide a bottom wall and opposite side walls, a separatel formed front wall adapted to be conn necte to said side walls, said front wall'and side walls providingpmts having apertures intended to mate with each other for receiving the front wall retaining means theresupporting cooperates, and a support for said contactl comprising means extending between and connected to the side walls near their upper edges whereby to hold said side walls in position with the apertures thereof adapted to mate the apertures of the front wall.

6. A device of -the classdescribed comprising a box having a removable Wall, a

switch mechanism within the box, a contact also within the box with which the switch mechanism is adapted to coperate, and a supportV for said contact ixedf within the box in a .position intermediate said contact and said removable wall so as to serve as port for. said Contact disposed to serve as A guard means for the contact when said removabley wall is removed, the box having also opposite side walls, said support including a bridge piece extending between and reinforcing said sidewalls relative to each other, and an insulating block with which the contact is directly connected, said. insulating block being fixed to and reinforcing the bridge piece.

8. ln a device of the class described, a switch device including a switch blade element, an operating element for the switch blade element and a contact element with which the switch blade element coperates, a box for saidelements, said box having opposite side walls spaced apart, and a brace extending between said sidezwalls to reinforce said side walls and serving as a supporting means for atleast one of said switch device elements.

9. In a device of the class described, a switch device including aswitch blade element, an operatin element for the switch blade element an a contact element with which the switch blade element coperates, a box for said elements, saidbox having opposits side walls spaced apart, a brace extending between said side walls to reinforce said side walls and-serving as a supporting means for at least one of said switch device elements, said box also having a removable front wall, and said brace beino mounted independently of said front wa support the mentioned switch device element irrespective of the removal of said front wall.

10. A device of the class described comprising a box having a removable wall, a switch device within the box made up of a switch blade element, an operating element for the switch blade element and a contact element with which the switch blade eleiis ment coperaties, and a support for one of In testimony whereof I ex my Signature sald switch devlce elements Xed 'Wlthln the 1n the presence of two w1tnesses-` box in a aosition intermediate Said Inentoned elenllent and said removable Wall so HUBERT F' KRANTZ' as to serve as guax'd means for, said nlen- Witnesses:

tioned element when said removable wall BERTHA HEROLD,

is removed. MABEL D. SALTER.

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