US1688229A

US1688229A - Antenna

Info

Publication number: US1688229A
Application number: US753730A
Authority: US
Inventors: Engebretsen Ragnvald
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-12-03
Filing date: 1924-12-03
Publication date: 1928-10-16
Anticipated expiration: 1945-10-16

Description

Oct. 16, 1928.

R. ENGEBRETSEN ANTENNA Filed Dec. 5, 1924 Patented Oct. 16, 1928.

PATENT OFFICE.

nAenVALn nnennnn'rsnn,

or BnooKLYn, NEW YORK.

ANTENNA.

Application filed December mounted upon a' base or pedestal for support ing the structure upon the roof of a building or the like.

A further object is to provide a globular antenna for use in either receiving or broadcasting wireless waves.

lVith these and other objects in view, the invention resides in certain novel construction and combination and arrangement of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claim, and are illustrated in the accompanying drawing, in which Figure 1 is a side elevation of my improved antenna.

Figure 2 is a vertical sectional View of the line 22 of Figure 1. g

Figure 3 is a horizontal sectional view on the line 33 of Figure 1.

Figure 4: is a detail view of a modified form of frame.

Figure 5 is a detail view of one of thccollapsible bands. I

Referring more particularly to the drawing, the reference numeral designates my improved antenna in its entirety and wh ch includes a globular cage 11, and a supporting structure 12. v

The globular cage 11 comprises a pair of opposed end plates 13, which are connected by semi-circular wires or arcuateshaped iiienibers 1 which extend radially'froni the vertical axis of the cage in equi-distantly spaced relation. Extending circumferentially and horizontally about the members or wires 14 are annular ringsor bands 15, which rings are arranged in equi-distantly spaced relation and intersecting the wires 14 at which points the wires are soldered together to provide a rigid structure. The wires l t and 15 are of copper material, it having been proven 3, 1924. Serial No. 753,730.

that such material produces the maximum result although any other suitable conducting material may be employed if desired,

The points of intersection of the wires 14:

and 15 are connected by cross wires .17 of a finer gauge material'than the

wires

14 and 15, winch increases the capacity of material as it has been found that a device of this nature constructed of approximately one-hundred feet of wire will produce the desired result. Cross wires 16are likewise soldered to the intersection of the wires 14: and 15. The supporting structure 12 above referred to comprises a base 17 having suitable openings therein for the passage of fastening elements such as screws for attaching the device to the roof of a building, and rising from the base is an upright or post 18 on which the cage is mounted. The mast is of insulating material to prevent wireless waves from being ground. The mast is also hollow for a portion of its length adjacent the top and receives a lightning rod 19 which projects above the top of the globular cage and which may be connected with the ground in any suitable manner. This rod serves to protect the cage from being struck by lightning, it being understood that lightning when it strikes usually strikes the highest point.

The lead-in wire 20 which connects the antenna with the receiving apparatus is formed with branches 21, one branch being connected to each of the respective wires or bands 14: adjacent the bottom of the cage, thereby providing a direct lead-in from the different radial directions of the cage.

From the foregoing description, it will be seen that my invention will be found convenient for use by amateurs in radio reception as the same may be easily placed in position upon a building without detracting from the appearance of the same. Of course, the cage can be increased in size and mounted upon a suitable tower for use when employed for receiving or broadcasting on an extensive basis.

In Figurese and 5, I have shown a slightly modified form in which each of the semicircular wires 18 has its ends formed with a disk, the disks being rotatably connected one over the other as at 22 whereby they may be spread to a radial position to receive the annular bands 14C, or moved together when not in use,

The bands 14 are formed of a pair of semicircular sections28 connected by'clips or the like 24, whereby they may be moved to a p07 sition one over the other when not in use, and when in use the same constitute an annular band similar to; ;t;-h;a-t shown in the preferred form. Any suitable means such as Wire connectors may be employed for holding the bands let in position upon the wires 13. This form of the invention will be found c'onvenient for shipping and storing purposes.

VJhi-le I have descri-hedwhat I deem to be the most desirable embodiment of my inventio11,' 'it is obvious that many of the details may be varied Without inany Way departing from the spirit of my invention, and I there fore do not limit myself to the enact details of constructionhei'ein set fortlrnor to anything less than the whole of my invention limited only by the appended claim. What is claimed as new is An antenna comprising a plurality of members and fixed-lyconnected thereto, cross 7 Wires connecting intersecting portions of said incmbersand said bands and llXGCl thereto, and lead-1n Wires 1o1n'edto' the rcspectlve arcua'te shaped members.

In testimony whereof I have aiiiXed my slgnature.

RAGNVALD ENGEBRETS'EN;