US1666979A - Fusible switch - Google Patents

Description

J. SACHS FUS IBLE SWITCH April 24,. 1928.

Filed Jan. 25. 1923 Patented' Apr. 24, 1928.

UNITED STATES JOSEPH SACHS, 0F HARTFORD, CONNECTICUT.

IUSIBLE SWITCH.

Application led Ianuary, 1923. Serial No.` 614,848.

rIhis invention relates to the class of knife blade switches which carry enclosed fuses. In this type of switch the switching member comprises two conducting elements mechanically joined but electrically separated "by insulating material, with clips for receiving an enclose/d fuse designed to electrically connect the elements, one element being pivoted to a clip fastened to an insulating base and the other element being adapted to be swung -into and out of engagement withanother clip fastened to the base.

One object of the persent invention is to provide a very simple and inexpensive construction for. the switching elements which will insure an efficient electrical connectionl between the fuse clips and the terminal clips.

Another object of the invention is to provide a very strong and inexpensive insulating construction for connecting the conducting elements' constituting the ends of the switching. member.

In the accompanying drawings Figure 1 shows a `top view of one switching member provided with clips for a knife blade type of fuse constructed accordin to this invention. Fig. 2 is aside elevation of the same with the base and terminal clips in section. Fig. 3 is a view of one end of the structure. Fig. 4 is a .view of the other end of the structure. Fig. 5 is a section on the plane indicated by the dotted line 5-5 on Fig. 2. Fig. 6 is a section similar to Fig. 5 but showing the fuse clips shaped for receiving a ferrule type of enclosed fuse. Fig. 7 us a detail showing a modified manner of uniting the conductor elements and the insulating connection.

Only one switching member is illustrated. The invention is applicable, however, to switches having two or more poles. The base 82 which is desirably porcelain, is made of a size necessary to receive the number of switching members to be used. A switch terminal clip 9 is' secured to the face of. the base near one end by a screw 10 and a switch termiiial clip 11 is secured to the face of the `base near the opposite end by a screw 10. The switching member is held at one end between theears of the clip 9 by a pivot stud 12 while'the other end of the switching member is formed to swing into and out of engagement with the ears'of the clip 11. The switchin member comprises two separated end con uctor elements 13 and 14.

`Aa has been heretofore proposed for switches of this general class each ofthe conductor elements 13 and 14 is formed of two similar plates of conducting material which are arranged and adapted to fit between and engage at their outer faces with the ears of the respective terminal cli s 9 and 11. In accordance with one phase o the invention I depart from prior practice by placing the two plates constituting each conductor element 13 or 14 indirect face to face contact with each other instead of spacinnf them apart as has been heretofore deemed necessary. The two plates of each pair are respectively provided with integral extensions which are so shaped andarranged as to constitute pairs of clips 18, 18 for receiving the terminalcportions of a fuse. The clips ymay be shaped `as shown in Fin. 5 for receiving the terminals of a knife bla e be shaped as shown in Fig. 6 for receiving the terminals of a ferrule contact type of enclosed fuse.

Insulating means is provided for connecting the pairs of conducting plates'and holding them in fixed relation to each other to form a unitary switch member.

By making the two conducting plates relatively thin and placing themin direct contact as described I am enabled to provide conductor or blade elements which are of the ordinary or standard thickness and which are thus adapted to' engage standard sized terminal clips; and at the same time the relatively thin plates by their described upward extensions form fuse clips of the required degree of ilexibilit In addition to adapting the conductor e ements' for 'engagement with standard cli s and in addition to providing the desire flexible clips I v element 13 is formed with an ear 13 extendin longitudinally toward the element 14 an the said element 14 is provided with connected by I Yl5,iiiconjunction-withihlo,QlllliCtig receivingclips, and two spaced'plates of.

an ear 14 extending longituidnally toward element 14 at the swinging end of the the element 13. i

The two elements '13 and 14 are preferably which .is fastened an insulating piece 20 two spaced strips or plates 15 provided'with a slot 21 for receiving a rod of insulating material which engage the op- 22 by means of which the switching member posite outer faces of the said conductor elemay be manipulated. inents at ortions thereof other than the The switching blades and fuse clips of the portions which are engaged by the terminal construction described may be rapidly and clips .9 and 11, that is, at the opposite outer cheaplystamped to shape from sheet metal faces of the said ears 13a and 14a. These by'simplel tools. They are easily put toplates 15 are secured to the said ears by gethcr and attached tothe insulation which means of rivets 16 as shown. The provision mechanically connects but electrically sepof two spaced plates secured to the outer aratesthem. As the switchingblades and face ofi the conductor elements instead of a fuse-.clips are integral the electrical eiiciency singlerentrally disposed plate gives greatly of the 'connections from the fuse to the increased strength without a corresponding switch-clips is high.

increase in the total amount or thickness of The invention, claimed is:

the insulating material. vln an electric switch of the knife blade The two spaced plates 15 are particularly type, the combination with a base and two 'advantageous when each of thel conductor separated clips secured to the base in alignelements comprises two conducting plates in ment with each other and each having ears direct face to face contact as already dewith'standard spacing between them, of a scribed. By providing the two connectzngpivotally mounted switch member comprisplates in combination with the two conducting four thin plates of conducting material ing plates I attain not only the advantages arranged in pairs with the inner faces of the described as beingincident to the positionplates of each pair in direct contact with ing of the said conducting plates in contact, each other and with their combined thickbut I avoid any necessity for specially forniness such as to adapt them to fit between and ing the saidconducting plates to receive or electrically engage at their outer faces with engage the connecting insulating means. the earsof the corresponding terminal clips,

Notwithstanding the advantages inciopposed integral extensions onthe plates of dental to the use of the two connecting plates the respective pairs forming pairs of fuse plates, it is nevertheless possible, ifwdesirediiiilating material-connecting the conductto provide a single conducting .plate 17 as ing plates and respectively secured to and illustrated in Fig. 7, and at the same time engaging the opposite outer faces of the said switching member has an extension 19 to retain some of the advantages which areinplates at portions thereof other than the cident to the use of two contacting conductterminal clip engaging portions. f'

ingznplates, such as 14:.

the device illustrated the conductor JOSEPH SACHS.

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