US1805725A - Fuse block attachment - Google Patents

Description

May I9, 1931. J. SACHS 1,805,725

FUSE 'BLOCK ATTACHMENT Filed June 3, 1926 4 Sheets-Sheet l May 19, 1931. J. sAcHs v 1,805,725

FUSE BLOCK ATTACHMENT Filed June 5, 1926 4 Sheets-Shee 2 :gli W JUSQU/7 555/75 May 19, 1931. J, SACHS 1,805,725.

FUSE: BLOCK ATTACHMENT Filed June 3, 1926 4 Sheets-Sheet 3 34a 23a ./'Hygar JUSQU/7 55C/75 @Y if {Mf/ l @UPNW I/Iqlyl 19,1931. J. SACHS 1,895,725

FUSE BLOCK ATTACHMENT Filed June 3, 1926 4 Sheets-Sheet 4 Patented May 19, 1931 PATENT OFFICE JOSEPH SACHS, OF HARTFORD, CONNECTICUT FUSE BLOCK ATTACHMENT Application filed June 3, 1926. Serial No. 113,492.

In meter service installations it is common to provide an electrical connecting and circuit controlling appliance by means of which the circuit to the meter and the connected load may be properly connected and controlled by manual operation as Well as automatically by means of fuses. Such connecting andy controlling devices have been incased in a suitable housing provided with 1'0 means for its protective relation and placement in connection With the meter itself. The housing is usually sealed so that the devices inside of it are inaccessible except by breaking the seal, thus providing security against tam- 35 pering and unauthorized manipulation or connection With the circuit ahead of the meter.

In'conjunction ywith installations such as described, it is frequently desirable to provide 29 devices or attachments adapted to be carried by or directly associated With the housings or cabinets and adapted for holding auxiliary fuses in position to be accessible tothe customer from the outside of the cabinets and also adapted for the connection of branch circuit Wires in series with the fuses. The present invention relates particularly to devices or attachments of this general character, al-

though as to some of its features it is not so 30 limited.

A device or attachment of the type to which the invention more particularly relates comprises a body, ordinarily of insulating inaterial, secured to or adapted to be secured to or immediately adjacent one Wall of the cabinet so as to at least partly close an opening therein. Carried by the block in position to be accessible externally of the cabinet are complemental contacts for receiving and holding one cr more fuses. One or more terminals respectively connected with the fuse receiving means are carried by the block so as to extend through the said opening in the f Wallkand to be available for establishing a connection with the load side of the circuit controlling appliance inside of the cabinet, and one or more other terminals respectively connected with the fuse receiving means in f series with the lirst said terminals are positioned for connection with conductor Wires ordinarily forming parts of branch circuits.y A very simple form of device of the class described is shown in my patent for incased circuit connecting and controlling device, N o. 1,465,688, dated August 21, 1923. As disclosed in this patent, each device or attachment is provided with means for holding a single fuse and both of the terminals are so located as to be accessible only from the interior of the cabinet. n

Another device of the same general type is disclosed in my patent for inclosed switch attachment, No. 1,597,484 dated August 24, 1926. The device as shown in this later patent embodies several improvements over the device as shown in the earlier patent. Instead of being adapted for holding only a single fuse, it is adapted for holding a plurality of fuses, and it is provided with terminals whereby a single device can serve for providing fuse connections for both legs of a branch circuit. Furthermore, the device as shown in the later'patent is particularly constructed so as to be adapted to be located in an open-side or U-shaped opening such as is commonly provided in a meter service cabinet.

A `device embodying the present invention is of the type already described and already exemplified by the devices shown in the said patents. In accordance with the invention,

however, several important improvements are incorporated as will presently appear.

One object of the invention is to provide as a part of the attachment one or more continuous terminals, Which may be flexible Wires, and Which are permanently connected With the fuse receiving means on the attachment so as to be adapted to extend into the cabinet for connection directly to conducting parts of the circuit controlling appliance Withinthe cabinet, thus eliminating the necessity for using separate conductor Wires for electrically connecting the attachment to the appliance.

A further object of the invention is to provide one or more terminals connected with the fuse receiving means and so located as to be accessible from the outside of the cabinet and adapted for the direct connectionl of conductor wires located entirely outside of the cabinet.

A still further object of the invention is to provide improved means for connecting the attachment to the cabinet with which it is associated.

Additional objects of the invention will be apparent from the drawings and from the following specification.

In the drawings I have illustrated several of the many possible embodiments of the invention, but it is to be understood that these embodiments of the invention are shown merely for purposes of illustration and are not to be construed as defining or limiting the scope of the invention, the claims forming a part of the specification being relied upon for that purpose. It will be further understood that the invention may be embodied in an attachment as a separate unit or in the combination of a cabinet and its contained appliance with an attachment.` l

Of the drawings:

Fig. 1 isaY front view showinor a part of a meter, a cabinet associated with the meter and having a circuit controlling appliance therein, and a fuse block attachment embodyin the invention, the front covers for the ca inet and the attachment being omitted.

Fig. 2 is a side view of the parts shown in Fig. 1, but with the coversV included.

Figs. 3 and 4 are respectively top and front views on an enlarged scale and showing one form of block which may be used.

Figs. 5 and 6 are views similar respectively to Figs. 3 and 4, but showing a somewhat different block. v

Fig. 7 is a front view on an enlarged scale showing the attachment separately from the cabinet.

Figs. 8 and 9 are vertical sectional views taken respectively along the lines 8 8 and 9-9of Fig. 7, the block being ofthe form shown in Figs. 5 and 6.

Fig. 10 yis a detail view showing a disk for Vholding the flexible terminal conductors.

Fig. l1 is a perspective view of the complete attachment as a separate unit.

Fig. 12 is a fragmentary viewV similar to Fig. 1, but showing a different wiring connection. l

Fig. 13 is a fragmentary view similar to Fig. 1, but showing an'attachment adapted for use with two, instead of four, branch circuits. j

Fig. 14 is a perspective view similar to Fig. 11, but showing the attachment appearing in Fig. 13. Y

Fig. 15 is a front view similar to Fig. 1, but showing a different fuse block attachment embodying some 'of the features of the in vention. l j

Fig. 16 is a side view of the parts-shown in Fig. 15.

load conductors.

associated with a meter and containing a me- 'j ter circuit controlling appliance. As concerns the details of the meter service equipment I do not in any way limit myself but for the purposes of illustration I have shown in Figs. 1 and 2 one form of equipment which may be used. As illustrated, there is a cabinet 1, preferably formed of sheet metal, and having` a back wall 2, side walls 3, 3,'a bottom wall 4, a top wall 5 and a movable cover 6 preferably hinged to thebottom wall. Located within the cabinet is av meter circuit controlling appliance represented as an entirety by 7. The details ofthe appliance 7 can be variedwidely, but the appliance as shown includes terminals 8, 8 and 9 adapted to be connected with incoming service wires, terminals 10, 10 and 11, 11 adapted to be connected with the meter and terminals 12, 12 and 9a adapted to be connected with the Interposed between the terminals 8, 8 and 10, 10 are fuse contacts 13, 13 and also interposed between these terminals are switch blades (not shown) which are operable by means of a handle 14 located on the exterior of the cabinet.

rlhe meter is' represented at 15 and preferably this is mounted in immediate co-op erative relationship with the cabinet, a part ofY the "meter projecting downward through an opening provided therefor in the end wall 5 of the cabinet. Thus the conductor wires connecting the appliance 7 with the meter are entirely enclosed within the cabinet.

The several terminals already,r referred to are preferably provided with auxiliary contacts adapted for the 'attachment of meter testing devices as well known in the art, and preferably the contacts 11, 11 and 12, 12 are respectively connected by means of movable testing blades 15a, 15a.

It will be seen that when the cover G is in closed position and sealed, the entire circuit controlling appliance 7, together with the fuses at 13, 13 and the several conductors and terminals are entirely protected from i so as to at least partly close an opening therein. As shown in Figs. 1 and 3 to 6, there is a block 16 Whichk is adapted to be mounted adjacent the bottom Wall 4 of the cabinet so as to at least partly close a circular opening therein, and preferably it is constructed to close the front portion of the opening leaving an unobstructed space at or near the rear of the opening. As shown the block lis provided With a. U-shaped recess 17 closed at the front and at both sides and open at the rear` end and at the end adjacent the cabinet. This recess registers with the opening in the cabinet Wall when the block is in place and provides space for conductor terminals as will presently appear.

Preferably there is a projection on the block which is adapted to extend into the opening in the cabinet Wall, the aforesaid recess 17 being located to extend into the projection. .As illustrated in Figs. 3 and 4 the projection 18 may be formed integrally with the bloclr and it is of such size and shape as to entirely close the opening in the cabinet Wall except for the recess 17. rlChe projection 18 is preferably utilized as a means for holding the bloclr in place, means being provided for engaging the projectien for this purpose inside of the cabinet, The projection is shoivn as being formed with external screiv threads 19 adapted to be engaged by nnt for the purpose not only of holding the block in place on the cabinet Wall but also of forcing it toward the cabinet with a clamping action.

Instead of making the projection 18 integral with the main body of the block, as shcivn in Figs. 3 and 4, I have found it ordinarily preferable to make the projection separate and to form it of metalor other material less fragile than the porcelain of Which the bloclr is usually formed. In Figs. 1, 5, 6 and 7 l have shcvvn a projection in the form of ay bushing 2O which is'separate from the main body of the block. Suitable means are provided as Will hereafter be described in detail for connecting the body of the block with the bushing. The bushing 2O is esternally threaded at 21 so as to be adapted to be engaged by a nnt 22. llVhen the separate bushing 20 is provided, the body of the block is preferably provided With a smaller projection 18a which is located inside of the bushsiderable amount of turning about the axis of the projection is prevented.

As already stated, the fuse receiving contacts are so located as to be accessible eX- ternally of the cabinet when the block is in place.v This makes the fuses available for renewal or replacement by the customer, notwithstanding the fact that the service fuses at 13, 13, and in fact the entire circuit controlling appliance 7 and its conductors, may b e sealed against access as already explained. The fuse receiving' contacts may be of any usual or preferred type and the invention in its broaderl aspects is not limited to contacts of any one type. I preferably construct and arrange the receiving contacts so that the fuses are removable in a direction at a considerable angle from the plane of the back cf the cabinet so as to be more easily accessible froin the front than they Would be if hey were removable in a direction parallel with the said plane as has heretofore been the practice. I have shown contacts adapted for the reception of fuses of the screwv plug type, and when provision is made for receiving fuses of this type, the fuses are held with their aires at a considerable angle from the plane of the back of the cabinet. Preferably, and as shown, the axes are perpendicular to the plane of the back of the cabinet and parallel to the cabinet Wall Which supports the attachment.

Figs. 1, 7, 8 and 9 show in detail an attachment having four pairs of contacts for receiving screw plug fuses, these being repre: sented at 23, 23 and 24, 2e. These are arranged With their axes positioned as described and with two pairs at each side of the center of the block.

For electrically connecting one Contact cf each pair With a conducting part of the appliance Within the cabinet at least one terminal is provided as already stated. Preferably when there are tivo or more pairs of contacts, two snch terminals are arovided in order that the attachment may form a part of a three Wire circuit, seme of the pairs of contacts being connected with one terminal and the remaining ones with the other. As shown in Fig. 9, the center contacts of the pairs 23, 23 are connected together by a conducting strip 25 in a groove at the back of the block. rlChe center contacts of the pairs 2e, 24 are similarly connected together by a conducting strip 26 in another groove at the back of the block. The said grooves communicate with the U-'shaped recess 17 and the before mentioned terminals are respectively connected with these strips 25 and 2G and are positioned to extend into the cabinet when the block is in place, so as to be available for establishing a connection with conducting parts of the said appliance within the cabinet.

Preferably each of the terminals is permanently connected to the block and with the llO corresponding fuse contact or contacts 'and is in the form of a continuous terminal conductor long enough to extend through the said opening in the cabinet vvalland to directly and of itself engage and connect With a conducting part of the appliance Wit-hout the use of any separate Wires or other intermediate conductors. Thee terminals are included as composite elements ot' the completertuse blockattachment at the time of its manufacture and prior to its connection With the cabinet. They are not intended to be removed or disconnected at any time. Preferably, and as shown,'the terminals are in the torni of flexible Wires 27 and 28 which are permanently connected respectively With the strips and 26 Vand which are located inthe recess 17 so as to extend through the bushing 20 and into the cabinet when the block is in place. These flexible terminal wires may be respectively connected directly to theterminals l2, l2 of the appliance 'l' as shown in Fig. l. It will be observed that the connection ot each terminal to the block and to the corresponding the strips 25 and 26 and containing the connection with the terminal Wires 27 and 28 are iilled with ysealing Wai; or other similar material as indicated at 2f). 'As shown the sealing Wai; also extends into the recess i7.

ln order to provide a neutral path or coni nection for the attachment l preferably provide another terminal conductor similar in tunction and in Jform to thoser already described. W`hen the terminal conductors are in the form ot flexible Wires as shown, a neutral terminal conductor 30 is located in the recess i7 in grouped relation With the other conductors and extends into a groove in the bacl; of the block, as shown in Fig. 8. As shown in Fig. l this terminal conductor 30 may be directly connected to the neutral terminal 9 on the appliance When flexible conductors are provided and when a metal bushing 20 is provided l preterably provide insulating means, supplemental to their own insulation, for holding the conductors out of Contact with bushing at the rear 'waere the recess l? is open. As shown in F l0 this means is a plate or disk 3l of insulating material having one or more closedside openings through which the conductors entend. rlhis dish engages the end of the projection 18a and is seated Within the bushing 2O which may be provided With an in- Ward exte'iding flange to hold the disk in place.

As shown in Figs. 1l and l2 the tWo terminals 27 and 28 may consist of a single continuous piece of Wire permanently connected to the block at its ends asdescribed. When a continuous or looped terminal is thus provided affurther `advantage is obtained inV as sho'vvn in Fig. l2. In this case the terminal 30 is connected yto the other terminal 12. This looped arrangement makes it possible for the installing Workman to connect both terminals simultaneously, not only saving time but providing ya neater and better connection. n

The remaining contacts of the pairs of fuse contacts, in the construction shown these being the outer threaded shells, are connected respectively to circuit Wire connecting terminals. Preferably and in accordance With one phase oi the invention these terminals arev positioned to be accessible from the outot' the cabinet. when the block is in place and they are adapted for the direct connection ot circuit Wires located entirely outside ot' the circuit. These terminals are shown at 32, and 33, 33. The outside location of these terminals makes it unnecessary to carry the branch circuit connections back into the cabinet as Was necessary in the constructions shown in my aforesaid patents.

When a i neutral connection is provided there is a common neutral terminal 34 for the Wires of all ot the branch circuits. this neutral terminal 34 is located in a recess in the front of the block and is connected by means of a screw 35 With the terminal conductor 30. Preferably the joint between the screw 35 and the conductor 30 is covered With sealing` Wax or similar material as shown at 29a. Y

I preferably provide means such as a plate for covering the connections for the terminals 27, 28 and 30 and rendering such connections inaccessible even When the attachment is not connected to a cabinet. By preference this plate constitutes the rear Wall of a boX 36 which encloses at least a part of, and ordinarily a major portion of,the block and parts carried thereby.

The box 36, as shown, is constructed to enclose substantially the entire block 16, but it is provided with an opening inthe top Wall through which the bushing 2O and the projection 18a extend. The box has amovable,

inner surface oi* the top Wall of the box, and

thus the box serves as a means for connecting the bushing to the body part of the block. Preferably the collar 39 is square, or otherwise non-circular, and fit-s a similarly formed recess in the top of the body part of the block. In this Way the bushing is interlocxed with the body part of the block to prevent rotation. rlfhe bushing 2O is engaged by the nut 22 as already described and these parts, therefore, constitute common means for clamping both the block and the box to the cabinet Wall. The rear wall of the box is preferably flush with the rear Wall ofthe cabinet When the attachment is in place and thus both the box and the block are held against rotation about the axis of the bushing.

The box is provided with conveniently located knoclr-outs which may be removed to permit the passage of branch circuit conductor Wires connected with the terminals 32, 32, 33, 33 and 34. As shown conduit pipes are connected to the box at the several knockout openings.

The box 36 may be provided with a removable auxiliary interior cover 40 as shown in Figs. 7, 8, .9 and 11. This cover serves as a so-called dead front to prevent accidental contact with the terminals and conductors inside the box, and it is provided With openings through which the fuses may 'be removed orput in place. The details of the construction and mounting of the ,cover 40 form no part of the present invention.

Preferably vsmall insulating bushings 4()Ll are mounted in holes in the cover 40, these bushed holes providing means whereby test Wires may be inserted to engage the respective Wire receiving terminals on the block.

In Figs. 13 and 14 I have shown an embodiment of the invention adapted for `use when only tivo branch circuits are required. The construction is otherwise similar to that shown in Figs. 1, 2 and 5 to 12 and repetition of the detailed description is unnecessary. The attachment comprises a block 16l similar to the block 16 except that it is provided With only two pairs of fuse receiving contacts 23l and 24a. Terminal conductors 27, 28a and 30a are provided similar to the conductors 27. 28 and 30 and there are also provided load wire receiving terminals 32", 33* and 34,

The block is enclosed in a box 86a similar toV the box 36 except as to size. In Figs. 15 to 19 I have shown an attach i ment which is different in appearance and in detaiis of construction from the attachments already described, but which nevertheless embodies some of the features of' the invention.

The attachment comprises a block 41 having a projection 42 which is shaped and adapted to extend through and fit an openside notch in one side Wall of the cabinet and extending from the front thereof.` Carried by the block are one orfmore pairs of fuse receiving contacts, the said contacts being accessible from the outside of the cabinet when the block is in place. As shown, there are tvvo pairs of contacts 43, 43 adapted for receiving fuses of the screw plug type With their axes parallel. to the supporting Wall of the cabine j Connected respectively with the pairs of fuse receiving contacts are terminals 44, 44 which extend inward through recesses 45, 45 in t-he projection 42. In the present-instance the terminals are not adapted to directly and of themselves engage and connect with a conducting part on the appliance Within the cabinet, but they are nevertheless so position-ed as to be available for establishing connection-s with such conducting parts.

Also connected respectively with the fuse receiving vcontacts in series with the said terminals 44, 44 are terminals 46, 46 which are mounted on the block in position to be accessible from the outsidev of the cabinet when the block is in place so as to be adapted for the direct connection of branch circuit vconductor Wires located entirely outside of the cabinet. Wire receiving holes or recesses 47 extend through the block adjacent the terminais 46, 46.

Connected with the block 41 is a box -48 which is in position to engage the supporting Wall of the cabinet when the block is in normal position as shown. The box 48 does not enclose the entire block, but yit provides a chamber adjacent the rear surface of the block, this chamber being adapted for the reception of branch circuit Wires which are connected to the said terminals 46, 46. -The box 48 is provided With one or more knock-outs adapted to be used for the admission of the said Wires to the box and for the connection of conduit pipes.

As shown in the drawings the box 48 serves not only toenclose the end parts of the circuit Wires as stated, but it also serves as Ia means for the attachment of the block to the cabinet Wall. The cabinet Wall and the adjacent Wall of the box are provided with screw holes-so that a screw 49 may be insert-ed for the purpose of clamping the box against the cabinetv Wall and thus holding the entire device in place in the openside notch. The screw 49 t-hus constitutes a common means for clamping both the box and block to the cabinet Wall.

Preferably a hinged cover 57 is provided at .1.2.

the front side of the block for enclosing the fuses.

As shown in Fig. 15 the Wiring is for a two- Wire system and the attachment provides fuses in both legs of a branch circuit. Two attachments are shown secured to one cabinet in order to provide for tvvo branch circuits. It will be understood, however, that different Wiring connections may be provided so that a single attachment may provide a fuse in one leg of each of two branch circuits, whether two-wire or a three-wire system be used.A

When the attachment is so wired a neutral wire may be led into the box 48 through a mounted immediately adjacent a wall of the said cabinet so as to at least partly close an opening therein, a pair of complemental fuse receiving contacts on the block accessible ex-l ternally of the cabinet when the block is in place as aforesaid, a circuit wire connecting terminal electrically connected with one of the fuse receiving contacts on the block, and a continuous conductorhaving a permanent electrical connection with the other fuse receiving contact on the block so as to be included as a composite element of the complete fuse block attachment prior to its connection with the said cabinet and being long enough to extend through the said opening in the cabinet wall and to directly and of itself engage and connect with a conducting part of the appliance within the cabinet when the block is in place as aforesaid.

2. A fuse block attachment for an electric appliance containing cabinet comprising in fuse block attachment and being long enough to extend through the said opening in the cabinet wall and to directly and of itself en gage and connect with a conducting part yof the appliance within the cabinet when the block is in place as aforesaid, and a box connected with the block so as to enclose at least a part thereof and serving to render the electrical connection between the said. conductor terminal and the corresponding fuse contact inaccessible prior to the connection ofthe attachment to the said cabinet.

3. A fuse block attachment for an electric appliance containing cabinet comprisingV in combination, a block adaptedto be externally `mounted immediately adjacent a wall kof the said cabinet so as to at least partly close an opening therein, a pair of complemental fuse receiving contacts on the block accessible yexternally of the cabinet when the block is in place as aforesaid, two circuit wire connecting terminals of which one is electrically conits connection with the said cabinet and all being long enough to extend through the said openingin the cabinet wall and to directly and of themselves engagevand connect with conducting part-s of the appliance within the cabinet when the block is in place as aforesaid.

4. A fuse block attachment for an electric appliance containing cabinet comprising in combination, a block adapted to be externally mounted immediately adjacent a wall of the said cabinet so as to at least partly close an opening therein,`the said block having a narrow recess in the back thereof open at one end so as to register with the said openingin the cabinet wall, a pair of complemental fuse receiving contacts on the block accessible externally of the cabinet when the block is in place as aforesaid, a circuit wire connecting terminal electrically connected with one of the fuse receiving contacts on the block, and a continuous terminal conductor having a permanent electrical connection with the other fuse receiving contact on the block so as to be included as a composite element of the complete fuse block attachment prior to its connection with the said cabinet, the said terminal conductor being positioned in the said recess so as to extend through the said opening inthe cabinet wall when theblcck is in place as aforesaid and being long enough to directly and of itself engage and connect witha yconducting part of the appliance within the cabinet. 2

5.k A fuse block attachment for an electric appliance containing cabinet comprising in combination, a block adapted to be externally mounted immediately adjacent a wall of the said cabinet so as to at leastpartly close an opening therein, a pair Vof complemental fuse receiving contacts on the block accessible externally of the cabinet when the'block is in place as aforesaid, a circuit wire connecting terminal electrically connected with one of the fuse receiving contacts von the block, and a continuous flexible terminal conductor wire having' a permanent electrical connection Awith the other fuse receiving contact on the block Vso as to be included as a composite element ofthe complete fuse block `attachment prior to its connection with the said cabinet and being long enough to extend through the said opening in the cabinet wall and to directly andfof itself engage and connect with a conducting part ofthe appliance within the cabinet when the block is in place as aforesaid.

6. A fuse block attachment for an electric appliance containing cabinet comprising in combination, a block adapted to be externally mounted immediately adjacent a wall of the said cabinet so as to at least partly close an opening therein, two pairs of complemental fuse receiving contacts on the block accessible externally of the cabinet when the blocl is in place as aforesaid, two circuit wire connecting terminals each electrically connected with one of the fuse receiving contacts of one of the pairs of such contacts on the block, and a continuous flexible looped terminal conductor wire having permanent electrical connections at its respective ends with the other fuse receiving contacts of the pairs of such contacts on the block, the said terminal conductor wire being included as a composite element of the complete fuse block attachment prior to its connection with the said cabinet and being long enough to extend through the said opening in the cabinet wall and to directly and of itself engage -andconnect with one or more conducting parts of the appliance within the cabinet when the block is in place as aforesaid and the said terminal conductor wire being adapted to be cut between its ends for a three wire circuit or to remain intact between its ends for a two wire circuit.

7. A fuse block attachment for an electric appliance containing cabinet comprising in combination, a block adapted to be externally mounted immediately adjacent a wall of trie said cabinet so as to at leastpar-tly close an opening therein, two pairs of complen'iental fuse receiving contacts on the blockaccessible externally of the cabinet when the block is in place as aforesaid7 three circuit wire connecting terminals of which two are electrically connected respectively with two of the fuse receiving contacts of the two pairs of such contacts on the block, a continuous flexible looped terminal conductor wire having perman-ent electrical connections at respective ends with the other fuse receiving` contacts of the pairs of such contacts on the block, and another continuous flexible conductor wire having a permanent electrical connection at one end with the remaining circuit wire connecting terminal, both ofthe said terminal conductor wires being included composite elements of the complete fuse block attachment prior to its connection with the said cabinet and both of them being long enough to extend through the said opening in the cabinet wall and to directly and .of themselves engage and connect with conducting parts of the appliance within the cabinet when the block is in place as aforesaidA and the lirst of the said terminal conductor wi being adapted to be cut between its ends for a three wire circuit or to remain intact between its ends for a two wire circuit.

8. A fuse block attachment for an electric appliance receiving cabinet comprising in combination, a block adapted to be externally mounted immediately adjacent a wall of the cabinet so as to at least partly close an opening therein, a pair of complemental fuse receiving contacts on the said block accessible externally of the cabinet when the block is in place as aforesaid, a terminal connected. with oney of the fuse receiving contacts and positioned on the block to extend through the said opening and to be available for establishing a connection with a conducting part of the appliance within the cabinet when the block is in place as aforesaid, and a second terminal on the block connected with the other fuse receiving contact and positioned to be accessible from the outside of the cabinet when the block is in place as aforesaid so as to be adapted for the direct connection of a circuit conductor wire located entirely outside of the cabinet.

9. A fuse block attachment for an electric appliance receiving cabinet comprising in combination a block adapted to be externally mounted immediately adjacent a wall of the cabinet so as to-at least partly close an opening therein, a pair of complemental fuse re ceiving contacts on the said block accessible externally of the cabinet when the block is in place as aforesaid, a terminal connected with one of the fuse receiving contacts and positioned on the block so as to be adapted to extend through the said opening and to be available for establishing a connection with a con ducting part of the appliance within the cabinet when the block is in place as aforesaid, a second terminal on the block connected with the other' fuse receiving contacts and positioned to be accessible from the outside of, the cabinet when the block is in place as aforesaid so as to be adapted for the direct connection of a circuit conductor wire located en tirely outside of the cabinet, and a box connected with the block and substantially enclosing the said block and also enclosing the fuse contacts and the last said terminals.

10. A fuse bloclr attachment for an electric appliance receiving cabinet comprising in combination a block adapted to be externally mounted immediately adjacent a wall of the cabinet so as to at least partly close an opening therein, a pair of complemental fuse receiving contacts on the said block accessible externally of the cabinet when the block is in place as aforesaid, a continuous terminal conductor having a permanent electrical connection with one of the fuse receiving contacts so as to be included as a composite element of the complete fuse block attachment prior to its connect-ion with the said cabinet and being long enough to extend through the said opening in the cabinet wall and to directly and of itself engage and connect with a conducting part of the appliance within the cabinet tion of a circuit conductor Wire located en tirely outside of the cabinet.

ll. The combination of a circuit controlling appliance and the service and load conductors therefor', a cabinet enclosing the appliance and conductors and adapted to be sealed for protecting them against unauthorized access, a block, nieans for exteri'ially securing the bloclr to a Wall of the cabinet adjacent an opening therein so as to at least partly close the same, a pair of complement-al fuse receiving contacts on the said block accessible externally of the cabinet, a terminal connected With one of the fuse receiving contacts and positioned on the block to extend through the said opening and to be available for establishing a connection With a conducting part of the appliance Within the cabinet, l and a second terminal on the block connected with the other fuse receiving contact and positioned to be accessible from the outside of theA cabinet so as to be adapted for the direct connection of a circuit conductor Wire located entirely outside of the cabinet.

l2. A fuse block attachment for an electric appliance receiving cabinet comprising in combination, a block adapted to be externallyn'iounted immediately adjacent a Wall of the cabinet so as to at least partly close an opening' therein, a box enclosing a or portion of the said block, a common means for clamping both the block and the box to the said wall of the cabinet, a pair of fuse receiving contacts carried bythe said block inside the box and accessible externally of the cabinet when trie block and rbox are in place as aforesaid, a terminal connected with one of the frise receiving contacts and positioned on the block so as to be adapted toextend through the said opening inthe cabinet Wall and to be available for establishing va connection with a conducting part on the ap- `liance Wit iin,V the cabinet, and a second other fuse receiving contactV and positioned to be accessible from the outside of the cabinet so as to be adapted for the direct connection of a conductor wire,

i3. A fuse block attachment for an electric appliance receiving cabinet comprising in combination, a block adapted to be externaliv mounted immediately adjacent a Wall of the cabinet and having a projection extending into and approximately litting an opening therein, a box enclosing a major portion of the said block and having an opening in one wall through Which the said projection extends, means adapted to be located Within the cabinet for engaging the projection to hold ninal inside the box connected with the both the block and the box in fixed relation to the said Wall ofthe cabinet, `a pair of fuse receiving contacts carried by the said block inside the box and accessible externally of the cabinet When the block and box are in place as aforesaid, a terminal connected with one of the fuse receiving contacts and pos; ioned on the block so as to be adapted to extend through the said opening in the cabinet Wall and to be available for establishing a conneet-ion with a conducting part on the appliance Within the cabinet,` and a second terminal connect-ed with the other fuse receiving contact and adapted for the connection of a conductor Wire.

lll, A load circuit fuse attachment for an electric appliance receiving cabinet comprisi `g in combination, a bloclibody adapted to be externally mounted immediately adjacent a Wall of the cabinet so as to at least partly close an opening therein, a pair of fuse receiving contacts on the said block body accessible externally of the cabinet When the body is in place as aforesaid, a terminal connect'ed with one fuse receiving Contact and positioned on the body so as to be adapted to extend through the said opening in the n Wall and to be available for establishing a connection Witha conducting part on th-e appliance Within the cabinet, a second termi nal on the block body connected With the other fuse receiving contact and adapted for the connection of a conductor Wire, a bushing separate from the block body surrounding .the first said terminal and adapted to project through the said opening in the cabinet Wall, means for connecting the bushing to the body,

and means for engaging the bushing inside of the cabinet to secure the body in place as aforesaid.

15K. A load circuit fuse attachment for an electric appliance receiving cabinet comprismg m combination, a block body adapted to ybe externally mounted immediately adjacent a Wall of the cabinet so as to at least partly close an opening therein, a pair of fuse receiving contacts on the said block body accessible externally of the cabinet when the body is in place as aforesaid, a terminal connected With one fuse receiving contact and positioned ony the body so as to be adapted to extend through the said opening in the cabinet wall and to be available for establishing a connection With a conducting part on the appliance Within the cabinet, a second terminal on the block body connected With the Y other fuse receiving contact and adapted for the connection of a circuit conductor Wire, a box enclosing a major portion of the block body and also enclosing the fuse contacts and the last said terminal, the said box having an opening in one Wall adapted to register With the opening in the cabinet Wall, a bushing separate from the block body surroundf ing the lirst said terminal and extending through the opening in the box Wall and being adapted to project through the opening in the cabinet Wall, the said bushing having a collar inside of the box engaging both thev ing in combination, a block adapted to be externally mounted immediately adjacent a Wall of the cabinet'and having an attaching means adapted to extend into an open-V ing therein, a pair of fuse receiving contacts on the said block accessible externally of the cabinet when the block is in place as aforei said, a terminal connected With one fuse receiving contact and positioned on the block Vso as to be adapted to extend through the said opening in the Wall and to be available for establishing a connection with-a conducting part on the appliance within the cabinet, a second terminal on the block connected With the other fuse receiving contact and adapted for the connection of a conductor Wire, and a box enclosing a major portion of the block and also enclosing the fuse contacts and the last said terminals, the said box having an opening therein for the said attaching means and being constructed so that its rear Wall is ilush With'the rear Wall of the cabinet when the attachment is in place thereby preventing rotation of the box and block about the axis of the attaching means when the cabinet is mounted on a iiat'supporting Wall. l

17. The combination of a circuit controlling appliance and the service and loadl conductorsy therefor, a cabinet enclosing the appliance andrconductors and adapted to be sealed for protecting them against unauthorized access, a block externally mounted immediately adjacent a Wall of the cabinet so as to at least partly yclose an opening therein, a box enclosing a major portion of the said block and having one wall in contact With the said Wall of the cabinet, there being an opening in the lastsaid box Wall registering With the opening in the cabinet Wall, a

common means for clamping both the block and the box to the said Wall of the cabinet, a pair of fuse receiving contacts carried by the said block inside the box and accessible ing contact and positioned to be' accessible from the outside of the cabinet so as to be:

adapted for thedirect connection of a circuit conductor wire.

JOSEPH SACHS.

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