US2687863A

US2687863A - Base mount for antenna masts

Info

Publication number: US2687863A
Application number: US223004A
Authority: US
Inventors: Howard D Vogt; Oliver J Kieffer
Original assignee: Individual
Current assignee: Individual
Priority date: 1951-04-26
Filing date: 1951-04-26
Publication date: 1954-08-31
Anticipated expiration: 1971-08-31

Description

Aug. 31, 1.954 H. o. voc-rr ETAL 2,687,863

7 BASE MOUNT FOR ANTENNA MASTS Filed April 26, 1951 2 Sheets-Sheet l Howard D'VO Z A Oliver J Kieffer .INVENTORS A 31, 1954 H. D. vos'r ETAL 2,687,863

BASE MOUNT FOR ANTENNA MASTS Filed April 26, 1951 2 sheets-sheet 2 Howard D. Vogi r Oliver JKieffer INVENTQRS Patented Aug. 31, 1954 UNITED STATES" PATENT OFFICE BASE MOUNT FOR ANTENNA MASTS Howard-D. Vogt and Oliver J. Kieffer, Flint, Mich.

Application April 26, 1951, Serial No. 223,004

1 Claim.

This invention relates to base mounts for antenna masts and more particularly to base mounts constructed and arranged to aid in the erecting and lowering of antenna masts.

The primary object of the invention is to provide an antenna mast mount for supporting an antenna mast and a lever held at an angle relative to one another for raising and lowering the antenna mast upon. lowering or raising of the lever.

Another object of the invention is to provide an antenna mast. mount as set forth above wherein pivotally arranged socket on the mount detachably receive ends of thevmast and lever and permit removal of the lever aftererection of the antenna mast.

A further object of the invention, is to provide an antenna mast mount in, accordance with the precedin objects wherein guy wires may be attached to the mast and to the roof of a building prior to erecting the mast for controlling the position of the mast 1 during erection,,, thereby eliminating the services of considerable manual help in erecting the mast. It is also an object of the invention to provide an antenna mast mount of the above-indicated character which simple and substantial in construction, which can be manufactured economical-1y, and which will bethoroughly efiicient and practical in-use.

These, together with'avarious auxiliary features and objects of the invention which will later become apparent as the following description pro-- ceeds, are attained by'th'e present invention, preferred embodiments of which have been illustrated, by way of examples only, in the accompanying drawings, wherein Figure 1 is a partial perspective view of a building showing the improved antenna mast mount in use with an antennama'st erected;

Figure 2 is a similar View of the same prior to the erection of the antenna mast;

Figure 3 is an enlarged perspective View of the mount and lever in the position shown in Figure 2;

Figure 4 is an enlarged perspective view of the mount in the position with the antenna mast erected and the lever removed;

Figure 5 is a vertical sectional view of the parts in the position shown in Figure 4;

Figure 6 is a vertical section taken on line 66 of Figure 5;

Figure 7 is an elevational and sectional view- 2 showing the mount attached to a side of an inclined roof;

Figure 8 is a perspective view of a modified form of the invention showing the mount attached to a roof and in the position before erection of the antenna mast; and

Figure 9 is a similar view of the form of invention shown in Figure 8 with the parts in posie tion after the antenna mast has been erected.

Referring now more specifically to the accompanying drawings wherein like numerals des ignate similar parts throughout the various views, attention is directed first to Figures 1 and 2 wherein it will be seen that there is indicated at 10 a building with a gable roof H upon which a base mount l2 and two sets of guy wires I3 and 14 support an antenna mast l5 in erected position, as shown in Figure 1, and during the process or erecting, as shown in Figure 2. Each set of guy wires 5 3 and I4 consists of four wires attached to the roof II by eye bolts I6, one every ninety degrees around the mast when said mast is completely erected. All ofthe wires I 3 are attached to a rotatable ring I! located on the mast at a higher elevation than another rotatable ring i8 located on the mast to which the wires 14 are attached.

The improved antenna mast mount 12 forming the subject matter of the invention illustrated in Figures 1 through 7 consists generally of a roofattachment base 19 rotatably supporting on a vertical axis a substantially U-shaped bracket 20 which pivotally supports between the opposite upstanding legs thereof on a horizontal axis, a pair of socket members 2! and 22 into one of which is received an end of the mast l5, and into the other, an end of a lever 23.

On the opposite end of the lever 23 from that received in the socket 22 is secured a cap 24 which has an eye 25 on the end thereof through which are passed a guy Wire l3 and a guy-wire 14 connected to the mast l5 and temporarily attached to the side of the lever 23 by a clamp 26. These two guy wires are the only ones that are not attached to the roof prior to erecting the mast, and it is these two guy wires that are used for the purpose of raising the mast upon lowering the lever. The other guy wires stabilize the mast during the erection thereof. Ropes 21 tied in eyes 28 on opposite sides of the cap 24 and in eye bolt IE on the roof 5 i support the lever 23 against side movement during a pull thereon to raise the mast and are disconnected after the mast has been erected. Another eye 29 on the cap 24 has a chain 30 attached thereto which is dropped to the ground, as shown in Figure 2, where it may be conveniently engaged for applying a pull thereto for lowering the lever and raising the mast. After the mast is raised to a vertical position, the pair of guy wires I3 and I4 clamped to the lever 23 are disconnected from the lever and are attached to their respective eye bolts I6 on the roof.

I The roof-attachment base I9 is constructed of a heavy plate bent in substantially inverted U- shaped formation, as indicated by the numeral 3|, and with outwardly directed feet 32 provided with a number of holes through which screws or bolts 33 are extended for attachment to the roof. Slots 34 are provided at the bends where the feet 32 connect with the opposite sides of the inverted U-shaped portion 3| of the attaching base for facilitating bending of the feet at proper angles according to the pitch or slant of the roof.

Welded or otherwise attached to the top of the inverted U-shaped portion 3| is a heavy reinforcing plate 35 which, together with the top wall of said inverted U-shaped portion and bight portion 36 of the U-shaped bracket 20, has aligned holes 31 therein through which a bolt 38 extends for rotatably attaching the U-shaped bracket 20 to the roof attachment base I9. A nut 39 with a lock washer on the lower end of the bolt 38 serves the purpose of binding the engaging faces of the plate 35 and bracket 20 against turning movement relative to one another.

On the inner surfaces of the opposite side legs 49 of the U-shaped bracket are secured by welding, or any other method, reinforcing spacers 4| that engage outer side faces of a forked extension 42 on the socket member 2|, while a single extension 43 on the socket member 22 is received in the forked extension 42. Through aligned openings in the side legs 40, spacers, 4|, forked extension 42, and extension 43, a bolt 44 extends for pivotally connecting the socket members 2| and 22 to the U-shaped bracket. A nut 45 with a lock washer is threaded on the bolt 44 for retaining said bolt in place. Extending downwardly from the interior of the socket 2| is a small port 46 for permitting drainage of rain water or other substances that may possibly enter said socket.

The walls of the sockets 2| and 22 have transversely aligned openings 4'! and 48, respectively, therein for alignment with openings in the antenna mast I and lever 23 and through which

bolts

49 and 59 are temporarily placed and retained by wing nuts 5| and 52, respectively, for preventing accidental disengagement of parts during erection of the mast. After the mast is secured in erected position, the

bolts

49 and 59, together with the lever 23, are removed, and a set screw 53 in the wall of the socket 2| holds the mast I5 against turning in said socket.

By referring now to the form of invention illustrated in Figures 8 and 9, it will be observed that the lever socket member, indicated by the numeral 22, instead of being pivotally connected to the U-shaped bracket 20 at the pivotal connection of the antenna mast socket member 2| to said bracket, is pivotally supported on the side of the socket member 2| by positioning the extension 43 of the socket member 22 between a pair of spaced lugs 58 on the socket member 2 I and extending a bolt 59 through aligned openings in the lugs 58 and extension 43*. With this arrangement, the socket member 22 may also be removed along with the lever 23 after erection of the antenna mast I5 by merely removing the bolt 59.

In operation, the base I9 of the mount is secured in proper position on the roof II by the screws or bolts 33 after which the mast I5 and lever 23 are inserted in the sockets 2| and 22, respectively, and secured in place by the

bolts

49 and 50. Three guy wires of each set I3 and I4 are attached to the rotatable rings I1 and I8 on the mast I5 and to the eye bolts I6 secured to the roof, while the other guy wire of each set I3 and I4 is passed through the eye 25 on the lever 23 and is temporarily secured to the lever by the clamp 26 for holding an angled relationship of the lever to the mast. Stabilizing ropes 21 for the lever are then tied to the eyes 28 on the lever and to eye bolts IS. The free end of the chain 39 is then dropped to the ground with the parts in the positions shown in Figure 2.

To erect the mast, a pull on the chain 30 will lower the upper end of the lever and raise the mast while the guy wires I3 and I4 attached to the roof and the ropes 21 also attached to the roof will stabilize the mast and lever during the erection of the mast. When the mast is in a vertical position, the guy wires I3 and I 4, temporarily clamped to the lever, are disconnected and secured to their respective eye bolts I6, thus completing the supporting of the mast in erected position. By then pulling the lever sidewise, the mast may be turned on the bolt 38 for pointing the antenna bars on the mast in directions for proper reception. Next, the nut 39 is tightened to hold the mast against further turning movement. By then tightening the set screw 53 and removing the

bolts

49 and 59 and lever 23, the erection of the mast is completed.

To lower or remove the mast for adjustments or repairs, the procedure just described is reversed; thus, it can be seen that two workmen may conveniently and effectively erect or lower the antenna mast with the least exertion and with less likelihood of an accident.

In view of the foregoing description taken in conjunction with the accompanying drawings, it is believed that a clear understanding of the construction, operation, and advantages of the device will be quite apparent to those skilled in this art. A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there are herein shown and described preferred embodiments of the invention, various changes may be made without departing from the spirit and full intendment of the invention.

What is claimed is:

An antenna mast mounting and erecting device comprising a base for attachment to a building roof or other structure, a substantially U- shaped bracket with its bight portion rotatably connected to said base for movement of said bracket about a vertical axis on said base and with the spaced legs of said bracket extending upwardly, a socket member having a forked extension thereon pivotally supported between the legs of said U-shaped bracket for movement about a horizontal axis while the socket thereof receives the lower end of an antenna mast, and a second socket member having an extension thereon also pivotally connected to said bracket and arranged between the forked extension of said first-mentioned socket member, said second-mentioned socket member being adapted to temporarily receive in the socket thereof one end of a lever which is temporarily connected to the antenna mast.

References Cited in the file of this patent UNITED STATES PATENTS 6 Number Name Date 2,628,796 Krizman Feb. 17, 1953 FOREIGN PATENTS Number Country Date 315,266 Germany of 1919 OTHER REFERENCES Catalog, Harco Steel Construction (30., May 4, 1945.