US1718270A - Fastening means - Google Patents

Description

June 25, 1929. c w wYMAN 1,718,270

FASTENING MEANS Filed Sept. 10, 1924 2 Sheets-Sheet l 30 fastening device.

. as of Fig. 3.

Patented June 25, 1929.

UNITED STATES PATENT OFFICIE.

CHARLES 'W. WYMAN, F CLAREMONT, NEW HAMPSHIRE, ASSIGNOB T0 SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

FASTENING MEANS.

Application filed September This invention relates to fastening means for fuse plugs, hand hole covers, or the like.

It has for its object to provide an im-' proved fastening means. Afurther object is to provide improved fastening means having a plurality of elements and each having cooperating securing elements. A further object is to provide an improved means for securing a removable element, which means employs a plurality of cooperating elements of which at least one is rotated when opened but is held against rotation, when fastened, by its cooperating element. A further object is to provide an improved fastening means which when applied to a plurality of elements to be fastened can positively fasten all of said elements by a single means.

In the accompanying drawings I have shown for purposes of illustration three embodiments which my invention may assume in practice.

In these drawings,-

Fig.1 is a plan view of a plurality of hand hole covers embodying my improved fastening means.

Fig. 2 is a side elevation of the structure shown in Fig. 1 partly broken away to show details of construction.

Fig. 3 is a modified form of my improved Fig. 4 isa side elevation of the structure shown in Fig. 3, partly broken away to show details of construction.

Fig. 5 is a transverse section on line 55 Fig. 6-is a further modification showing a fuse plug with my associated therewit f Fig. '7 is a view similar to Fig. 6 with the plug fuse removed:

ig. 8 is a partial transverse-section on line 88 of Fig. 6.

Fig. 9 is a partial transverse section on line 9-9 of Fig. 7.

In one illustrative embodiment of my invention, I have shown a frame or box structure 1 within which is disposed any suitable mechanism, such as a commutator for an electric motor, valve mechanism, or any other mechanism which it is desired should not be tampered with in an unauthorized manner. Access to this mechanism can be had through anfopening 2 over which a plate 5 is disposed and bolted to the frame by suitable cap screws 6 which may be sealed improved securing means 1 10, 1924. Serial No. 736,875.

in any suitable manner to prevent unauthorized removal. This plate 5 comprises a series of threaded apertures 7, 8 and 9, although it will be understood that a greater or less number may be used. PrO ecting upwardly from the opposite ends of said plate are apertured lugs 10 and 10. Disposed within the openings 7 and 8 are substantially identical covers 12 and 13 each having an arcuate recess 14 formed in the periphery thereof, the curvature. of the arcuate recess being the same as that of the periphery of flanges 15 of said covers. The last cover 11 is not provided with an arcuate recess, but instead has an apertured lug 16 extending upwardly from its flange 15.

In the operation of this form, assuming that all of thecovers are removed, the cover 12 will first be screwed into place and so positioned that the arcuate recess 14 will be as positioned in Fig. 1. The adjacent cover 13 is then screwed into place, which can be accomplished due to the fact that the curvature of the recess 14 .onforms to the periphery of the flange 15 of the adjacent cover. Said cover 13 is screwed into place with its recess 14 positioned as shown in Fig. 1; after which the final or master cover 11 will be screwed into place, and positioned so that the aperture in the lug 16 will be in alinement with the apertures in the lugs 10 and 10. A rod 17 having one end-bent as at 18 and the. other end straight will be inserted through the several apertures in the lugs, and a padlock or other suitable locking means 19 passed through a suitable opening in the straight end of the bar 17. Thus the single cover 11 controls or fastens the remaining covers, thus necessitating only a sin le locking device. It will be observed, owever, that a padlock could be passed directly through the lugs 10 and 16, but by passing a bar across the face of the covers any at tempt to remove one by force or otherwise will necessitate bending of the bar 17 and thus be a clear indication that an unauthorized attempt has been made to break into the interiorof the frame 1.

In the modification shown in Figs. 3 to 5 I have shown aplate 25 adapted to cover the opening 2 in the frame 1. This plate has a plurality of threaded apertures 26 which receive flanged threaded covers 27, each having a pair of upstanding apertured lugs 28. When in the position shown in Fig. 3, the 110 vice it will also be seen that there is a certain cooperation, as in the form shown in Figs. 1 and 2 between the various elements to be fastened in that fastening one element necessitates the fastening of the other. It is also to be observed that the bow of a padlock could be passed directlythrough the adjacent lugs 28 on each of the covers 27.

In Figs. 6 to 9 I have shown my improved securing means combined with a fuse plug with the purpose of positively securing the fuse plug in place before a switch can be thrown into closed position, thus providing means for positively holding the plug in place in case the same should explode which -would ordinarily eject the same from its socket. For purposes of illustration I have shown a case 35 having a recess 36 into which laterally projects a yieldingly pressed plug latching device 37. Extending longitudinally of the recess 36 and disposed above the same is a slot 38 adapted to receive a flange 39 extending upwardly of a periphery from the fuse plug 40 which is slidably received within the recess 36. The flange 39 has two arcuate recesses 41 and 42 which are arranged "so as to be in alinement with two transverse bores 43 and 44 respectively when the plug 40 is pushed into place. These bores project into the slot 38, a distance equal to one-half their diameter. Securing rods 45 and-46 are disposed within the bores 43 and 44, respectively, and each rod has a transverse slot 47 extending to a depth equal to one-half the diameter of the rod so that when the same are rotated to the position shown in Fig. 7, the uncut portion of the rods will be clear ofthe slot 38 and thus permit the insertion into the recess 36 of the plug 40 which will be held in its position by fastening member 37. It is to be understood that a suitable switch such as a knife switch could be connected to the securing rod 46; and to positively insure that the fuse plug will be held in the recess 36 before the switch is closed I have provided the pair of securing rods with flanges 48 each having an arcuate recess 49, the curvature of which is the same as that of the periphery of the flanges 48. A spring pressed pin 50 is also adapted to engage the transverse slot of the locking rod 46 as shown in Fig. 7 when the fuse plug is removed.

In the operation of this form of device, the fuse will first be inserted, the fastener 37 serving to hold the same in position. During this-insertion, the pin 50' will be forced out of engagement with the bar 46. The bar 45 will then be rotated, causing the uncut portion thereof to extend into the recess 41, thus doubly insuring that the fuse plug cannot be thrown or forced outwardly. When the arcuate recessvin the flange 48 of the locking rod 45 is adjacent the flange of the rod 46, the latter can then be turned to close the switch which it controls, it being noted that before the switch is adapted to be closed the fuse is doubly secured. It is also to'be noted that the pin 50 is assisted in holding the rod 46 against rotation, when the fuse plug is removed, by the flange 48 of the rod 45 extending within the arcuate recess formed in the flange of the rod 46,'

thus insuring that the switch cannot be closed until the plug is inserted.

While I have in this application specifically described three forms which my invention may assume in practice, it will be 'understod that these forms of the same are shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of the appended claims.

What I'claim as new and desire to secure by Letters Patent is:

1. In an interlocking mechanism, a grooved rotatable member, .a removable member relative to which said grooved member is rotatable, a plunger movable relative to and controlled by said removable member and receivable in said groove, and a I second grooved rotatable member rotating on an axis parallel to said first grooved rotatable member and constituting securing means thereforx 2. In an interlocking mechanism, a

grooved rotatable member, a removable 4 member relative to which said grooved member is rotatable, a plunger movable relative to and controlled by said removable member and receivable in said groove, and a second grooved rotatable member rotating on an axis parallel to said. first grooved rotatable member and constituting securing means therefor, said removable member being provided with a plurality of grooves with which said rotatable members cooperate in one position.

3. In combination, a removable member having a cutaway portion, a rotatable memher, a second rotatable member, said rotatable members each having arcuate portions andcutaway portions, the arcuate portion of the first of said rotatable members interfitting with the cutaway portion of the sec- 0nd, and the cutaway portion of the first being adapted to interfit with a portion of the removable member, a portion of the first rotatable member also'bemg adapted to fill the cutaway portion of the removable member to secure the same or to be moved out of said cutaway "portion so as to release the removable member.

.means for securing said slidable element comprising a plurality of movable members each adapted in one position to interfit with a portion of said slidable element, said movable members interengaging between themselves when both are in interfitting relation with said slidable element.

5. In combination, a principal member, a removable member having a cutaway portion, and means for fastening the removable member to the principal member comprising a plurality of rotatable elements one of which is adapted to engage said cutaway portion and thereby fasten said removable member when said rotatable elements are rotated to fastening position, a pair of said rotat able elements interengaging in said fastening position due to each having arcuate peripheral portions and cutaway peripheral portions and the arcuate portion of one of said members interfitting with the cutaway portion of the other.

6. In combination, a removable member formed with engaging portions, and mechanism adapted to interfit with said engaging portions for securing said member comprising two or more rotatable elements each having a securing portion adapted to be rotated into engagement withsaid removable member, said elements having other portions which interfit when said elements are in fastening position.

7. In combination, a removable member formed with engaging portions, and mechanism adapted to interfit with said engaging portions for securing said member comprising a rotatable element having a securing portion adapted to be rotated into engagement with said removable member and an in 40 terlock portion, and a rotatable element having a securing portion adapted to be rotated into engagement with said removable member and another portion adapted to move into interlocking relation with the corresponding portion of the first mentioned element upon rotation of said second mentioned element into securing position.

8. Means for fastening a removable member comprising a pair of elements, one of said elements having a latch portion mov' able into one position for fastening the memher and removable into another position for releasing the member, each of said elements having an interlock portion engageable by the other of the elements but engagement taking place only alternatively, engagement of one interlock portion taking place-when the latch portion is in one of its positions, and engagement of the other interlock portion taking place when the latch portion is in the other of its positions.

9. In combination, a removable member formed with engaging portions, and mechanism adapted to interfit with said engaging portions for securing said member, comprising rotatable elements each having a securing portion adapted to be rotated into engagement with said removable member, one of said elements having a positioning portion, said positioning portion being engaged by another of said elements upon rotation of the latter element, whereby the former element is held in securing position.

In testimony whereof I aflix my signature.

CHARLES WV. WYMAN.

CERTIFICATE OF CORRECTION.

Patent N... 1,718, 210.

Granted June 25, 1929, to

CHARLES W. WYMAN.

It is hereby certified that error appears in theprinted specification of the above numbered patent requiring correction as follows: Page 2, ll'I'lQS 29 and 30, strike out the words "of a periphery from the" and insert instead from the pen-- phery of a"; page 3, line 33, claim 6, fori"fastening" read secur ng and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this-30th day of July, A. D. 1929.

(Seal) M. J. Moore, Acting Commissioner of Patents.

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