US 2837304 A
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Description (OCR text may contain errors)
June 3, 1958 A, 5055, SR 2,837,304
' TELEVISION ANTENNA MAST BASE Filed May 9, 1955 2 Sheets-Sheet 1 zz 1a 9 [G L 23 16 s 11 f3 INVENTOR Albert G. 6066 51'.
BY wwamm June 3, 5 A. a. 605$, 55* v 2,837,304 TELEVISION ANTENNA MAST BASE v FiledMay 9, 1955 '2 Sheets-Sheet 2 INVENTOR Alba? 6'. Goes 5;:
BY WOW rnLEvIsioN ANTENNA MAST BASE Albert G. Goss, Sn, Hammonton, Calif. Q Application May 9, 1955, Serial No. 506,877 1 Claim. (Cl. 248-44 This invention relates to and it is a major object to provide a novel base adapted for use to secure the 'lower end of a light-weight, guy-wire stabilized mast in connection with a roof; the base being especially designedbut not limited-for use with a television mast.
Another object of the invention is to provide a mast base which is arranged to span the ridge and engage saddle-like on a double sloping roof in matching relation to the pitch thereof; the base being adjustable so that it can be set to match roofs having different pitches, while at the same time disposingvthe included mast clampingunit in a perpendicular position for reception of the lower end of the mast.
An additional object of the invention is to provide a mast base, which-except for certain securing bo1tsis constructed entirely of sheet metal, yet is strong, durable, and capable of effectively supporting a mast at the lower end thereof.
It is also an object of the invention to provide a mast base which is designed for ease and economy of manufacture, and convenience of installation.
Still another object of the invention is to provide a practical and reliable mast base, and one which will be exceedingly effective for the purpose for which it is designed.
These objects are accomplished by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claim.
In the drawings:
Fig. 1 is a perspective view of the mast base before use.
Fig. 2 is a longitudinal sectional elevation of the mast base taken substantially centrally thereof.
Fig. 3 is an enlarged transverse sectional elevation of the mast base taken intermediate its ends and showing such base as mounted for use.
Fig. 4 is an exploded view showing the major parts-of the mast base in end elevation.
Referring now more particularly to thedrawings, and to the characters of reference marked thereon, the mast base comprises a pair of flat rectangular plates 1 disposed in alined but spaced relation transversely; such plates I normally extending in downwardly and outwardly diverging relation to each other whereby to rest in matching relation on a double sloping roof 2 on opposite sides of the ridge 3 thereof. The plates 1 each include a plurality of holes 4 through which screws 5 pass into the engaged portion of the roof, whereby to rigidly secure said plates in place.
Each of the roof plates 1 is formed at the ends with upstanding flanges 6, and at their inner or adjacent ends said flanges are extended in the form of flat overlapping discs '7.
Each pair of fiat overlapping discs 7i. e. the pairs at opposite ends of the devicehave matching central holes 8 through which a pivot bolt 9 extends; said pivot bolts 9 being axially alined and lying in a longitudinal vertical plane centrally between the adjacent or inner edges of the spaced roof plates 1.
' nited States Patent 0 Additionally, each pair of the fiat overlapping discs 7 is formed with matching arcuate slots 10 concentric to the pivot bolts 9. A locking bolt 11 passes through each pair of the slots 10 and normally but adjustably clamps the related pair of discs 7 against rotative rotation. With the foregoing arrangement the roof plates 1 can be readily adjusted to match the pitch of any particular double sloping roof 2 upon which the base is to be mounted.
A longitudinal cradle, indicated generally at 12, extends from, end to end of the device centrally of the sides thereof between the pairs of overlapping discs 7; such cradle being disposed at the bottom in clearance relation to the inner edge portions of the roof plates 1.
The cradle 12 comprises a longitudinal bottom plate 13 formed at the ends with flat, integral, upstanding ears 14 which bear flush against the adjacent one of the re-' lated pair of discs 7. Each such ear 14 includes a central hole 15, and directly therebelowanother hole 16; the related pivot bolt 9 and locking bolt 11 passing through said holes 15 and 16, respectively, whereby the cradle 12 is normally maintained in rigid relation to the remainder of the base. mounting or suspending the cradle 12 it can be readily adjusted, upon loosening of the bolts 9 and 11, to a position with the bottom plate 13 transversely horizontal, and in which position it must be set in order to properly support the mast.
The tubular masta lower end portion of which is shown at 17-is secured in connection with the cradle 12 in the following manner:
Upstanding, longitudinal reinforcing or stiffening flanges 18 are formed along opposite side edges of the bottom plate 13, and a mast clampingunit, indicated generally at 19, is disposed between the flanges 18 centrally of the ends of the device. The mast clamping unit 19, which seats on the bottom plate 13, comprises a pair of opposed, V-channeled clamping plates 20 connected together at opposite sides by transverse tension bolts 21 which extend through sidewings 22 of said clamping plates.
A relatively heavy-duty cross bolt 23 passes through and spans between the flanges 18; such cross bolt likewise passing through the lower portion of the clamping plates 20.
The lower end portion 17 of the mast engages in the mast clamping unit 19 between the plates 20; the latter then being clampingly engaged on said portion of the mast by tightening the bolts 21. With said lower end portion 17 of the mast thus secured in the clamping unit 19, and with the latter maintained against displacement from the cradle 12 by the cross bolt 23, the mastat its lower endis effectively secured in connection with the base. Of course, abovelthe base the mast is stabilized by the usual guy wires.
The described mast base, by reason of its ready adjustment of the roof plates 1 to match roof pitch, and the adjustment of the cradle 12 in order to maintain the mast clamping unit 19 perpendicular, provides a very practical and useful device for the intended purpose, yet with a structure which is relatively simple but durable.
From the foregoing description it will be readily seen that there has been produced such a device as will substantially fulfill the objects of the invention, as set forth herein.
While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations therefrom may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claim.
Having thus described the invention, the following is However, with the foregoing manner ofclaimed as new and useful, and upon which Letters Patent are desired: A
A mast base comprising an elongated cradle having a bottom plate provided with upstanding end ears and upstanding longitndinalside flanges, a transversely adjustable socket-like mast clamp unit upstanding from and seated on the bottom plate centrally of its ends, a cross bolt through the side flanges and the clamp unit adjacent the lower end thereof, and means to mount the cradle on a roof comprising a pair of roof plates disposed in side by side spaced relation, an upstanding flange extending along each end edge of each plate for the full width of such edge, the related pair of flanges extending toward each other and across the space between the plates in close overlapping relation, the cradle extending the full distance between the pairs of flanges with the ears engaging the relatively inner ones of the plate flanges in the zone of overlap with the outer flanges, each of said ears and the related flanges having matching and substantially centrally located bolt holes therethrough, a pivot bolt extending-through 'said holes; each ear having another References Cited in the file of this patent UNITED STATES PATENTS 1,486,594 Malone Marrll, 1924 1,643,689 Woodin, If. Sept. 27, 1927 1,672,625 Rose"; e;; n;; June 5, 1928 1,987,995 Doring T Jan. 15, 1935 2,556,460 Ballam et a1 June 12, 1951 2,597,733 Jackson May 20, 1952 2,611,566 Landis Sept. 23, 1952 2,628,796 Krizman Feb. 17, 1953 2,632,616 Heistand Mar. 24, 1953 p