US1372140A - Electrical switch - Google Patents

Description

B. D. HORTON.

ELECTRICAL SWITCH.

APPLICATION FILED NOV. 10, 1917.

1,872, 140. Patented Mar. 22, 1921.

46 FIG I 40 I .6 5 iv FIG 21, 42 QZZT UNITED STATES BRYSON D. HORTON, OF DETROIT, MICHIGAN.

ELECTRICAL SWITCH. 9

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed November 10, 1917. Serial No. 201,219.

' Z '0 all whom it may concern:

Be it known that I, BRYSON D. HORTON, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Electrical Switches, of which the following, taken in connection with the accompanying sheets of drawings, is a full, clear, and concise description thereof.

This invention relates to electric fuseholding switches and with regard to certain more specific features thereof to fuse-hold ing switches of the double pole doublethrow type.

It is one of the objects of the present invention to' provide a simple, compact and inex ensive switch of the character above set orth.

Another object of the invention lies in the provision of contacts so constructed and arranged that an inclosed fuse may be quickly and conveniently attached or detached without the necessity of mechanically unbridging the switch parts.

Other objects will be in part obvious and inpart pointed out hereinafter.

The invention accordingly consists of the various features of construction, combination of elements and arrangements of parts which will be exemplified ,by the construction hereinafter set forth and the scope of the invention ofwhich will be indicated in the following claims.

In the drawin s, wherein is shown one of various possib e embodiments of themvention,

Figure 1 is a 'plan view of a switch comprising features of the invention,

Fig. 2 is a view in section taken on the line 2-2 of Fig. 1; and

Fig. 3 is a view in section, taken on the line 3-3 of Fig. 1.

- Referring now more particularly to the drawings, there is indicated at 1 a base block of insulating material. Mounted on this base block are three contact pairs 33', 44' and 5-5. In the embodiment shown these contacts are all of clip constructionthat is, each comprising spaced substantially parallel blade engaging jaws or walls. Each contact of the pair H is adapted for connection to a terminal 6 and each contact of the pair 55' is connected to a terminal 7 A carrier or bridging element 10, of frame construction, is provided with blade-like extensions or arms 11, portions of which are adapted to enter the spaces between the opposed walls of the contacts 33', and be pivotally connected thereto by means of pivot screws 12. Running parallel with these blade-like arms 11 for a portion of their length, are connector strips 13, the latter being offset as at 14, providing a fork which straddles one wall of each of the contacts 33", and also straddles an attaching portion 15 of a fuse-holding contact clip 20. The pivot screw referred to passes through the walls of the base contact, the blade 11, the attaching portion of the fuseholding contact and taps into the offset extension 14 of the connector 13. A spring washer 19 is provided between one of the walls ofthe base contact and the head of the pivot screw which may be sufliciently compressed to afford good electrical contact between all the parts without any undesirable binding.

The contacts 3-3 are identical, each consisting of a flat attaching portion 21, upstanding side walls 22, bowed inwardly at 23 and continuing in the form of spaced parallel jaws Q4. The fuse-holding contact 20 is substantially of the same form except that it is further provided with lips 25 to facilitate the operation of attaching the fuse. It will be noted that the contact 20 is mounted at right angles to the contact 3.

The carrier frame 10 has fixed thereon near its free end a pair of spaced apart double- throw switch contacts 30 and 31.

adapted to cooperate respectively with congiven a movement of substantially 180 degrees from a position of contact engagement with the base contacts 4-4 to a position of contact engagement with the base contacts 55. Fuse-holding contacts 40 are mounted on either side of the carrier near its free end'and in electrical communication with the blades 30 and 31, respectively. These fuse-holding contacts are similar in general construction to the fuseholding contacts 20 heretofore described, and they extend at right angles to the contacting blades in order to permit lateral introduction of the fuses. From the construction so far described, it will be obvious that the carrier frame is provided with a pair ductivity, permitting the carrier or bridg-' ing element 10 to be moved at will to conof fuse-holding contacts at either side; that Preferably the fuse is of the cartridgetype having a shell or body 44 of suitable insulating material and metal end caps 45. Projecting beyond the end caps 45 at either end are flattened knife blade terminals 46 adapted to be urged between the contact jaws of the contacts 20 and 40 and held in good electrical and retaining connection therewith, the blade 11 and connector strip 13, together with their'associated parts and pivot screw, provide simple .and highly eflicient pivotal means of good electrical contact with either of the opposite pairs of contacts 44 and 55 without undue friction and with good electrical contact.

In electrical communication with the contact pair 3 3 thereare terminals 50 corresponding 1n shape and construction to the terminals 6 and 7. J I

As many changes could be made in the above construction and as many apparently widely different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter set forth in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

What is claimed is:

1. In a fuse-holding switch, in combination, a base, a contact thereon having an.

upstanding blade, a carrier having a projecting fork of electrical conductivity adapted to straddle said blade, a fuse-receiving contact having a fiat attaching portion also straddled by said fork, means comprising a pivot member whereby said fork and fusereceiving contact are secured to said upstanding blade for movement relatively thereto, and a second fuse-receiving contact mounted on said carrier and insulated from the first said fuse-receiving contacts being adapted to receive a fuse for completing the circuit therebetween.

2. Ina fuse-holding switch, in combination, a base, a clip contact mounted thereon comprising a flat attaching portion and side walls bowed inwardly forming spaced contact jaws; a carrier having a projecting fork of electrical conductivity adapted to straddle one of said jaws, a fuse-carrying contact comprising a fiat attaching portion straddled by said fork and having inwardly bowed side walls forming spaced contact jaws, means for securing the fork and fusecarrying contact to the first said contact for relative pivotal movement thereon, a pair of contacts, one on said base and one on said carrier, adapted to be engaged and disengaged by movement of said carrier, and a second fuse-receiving contact mounted on said carrier insulated from the first said fuse-receiving contact but adapted to be connected'thereto by the insertion of a fuse between them.

- 3. In a fuse-holding switch, in combination, a base, a clip contact mounted thereon comprising a flat attaching portion and side walls bowed inwardly forming spaced contact jaws; a carrier having a projecting fork of electrical conductivity adapted to straddle one of said jaws, a fuse-carrying contact comprising a fiat attaching portion straddled by said fork. and having inwardly ;bowed side walls forming spaced contact jaws, means 'for securing the fork and fusecarrying contact to the firstsaid contact for relative pivotal movement thereon, a pair of contacts, one on said base and one on said carrier, adapted to be engaged and disengaged by movement of said carrier, and a second: fuse-receiving contact mounted on said carrier insulated from the first said fuse-receiving contact but adapted to be connected thereto by the insertion of a fuse between them, the carrier contact of said pair of contacts comprising a double-throw knife blade.

4. In a fuse-holding switch in comblnation, a base, a fixed contact comprising a BRYSON HORTON.

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