US1087301A - Bracket-arm. - Google Patents

Description

P. P. KOBERT.

BRACKET ABM.

APPLIOA'PION FILED JAN. 31, 1913.

III/II INVENTOR Rank P; Kobert,

v BY

1,087,301, Patented Feb. 17, 1914.

srarns a rib FRANK P. KOBERT, 0F HAVEN, CONNECTICUT.

BRACKES-ARM.

To all whom it may concern Be it known that I, FRANK I. Konnn'r, a citizen of the United States, and residing at New Haven, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Bracket-Anus, of which the following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same.

This invention relates to brackets and bracket arms for use as supports for electric cables in man holes and other places, and the object thereof is to provide an improved device or devices of-this class involving an upright support and a bracket arm or arms adjustably connected therewith. the construction of the entire device and. especially of the bracket arms being such as to give said arms the greatest possible strength in proportion to the'amountof material em ployed; and with these and other objects in view, the invention consists in the construction, combination and arrangement of parts hereinafter described and claimed Theinvention is fully disclosed in the following specification of which the accompanying drawing forms a part, in which the separate parts of my invention are designated by suitable reference characters in each of the views, and in which Figure 1 is a longitudinal central vertical section through a bracket arm made ac cording to my invention and through the support thereof; Fig. 2 a horizontal section on the line 2-2 of Fig. 1; Fig. 3 a plan view of a blank from which the main part of the bracket arm is made; Fig. & aview similar to Fig. 3, but showing theffirst step in the process of making the bracket arm from the blank shown in Fig. 3; Fig, 5 a side view of that part of the bracket arm shown in Fig. 4; Fig. 6 a view similar to Fig. 3, but showing a blank from which a heel piece forming .part of *the bracket arm is made;

Fig. 7 a back and end view of said heel piece as formed read for use from the blank shown in Fig. 6; Fig. 8 a back or bottom-view. of the bracket arm complete, as

shown in Figs. 4 and 5, with the heel piece Specification of Letters Patent. Patented Feb; 1",? 1914 I Application filed January 31, 1913. Serial No. 745,330.

supporting bracket arms on which are placed electric cables, and in Figs. 1 and 2, I have shown at I) my improved bracket arm for this purpose. The suppdrt a consists of a piece of channel-iron which, in practice is secured in a vertical position to a suitable frame work or other support placed in a. manhole, and said channel-iron is provided at intervals with transverse slots oropenings c having downwardlydirected extensions (1. of less transverse dimensions than the slots or openings c and the bracket arm or arms b, any "les'ired number ofwhich may be employed, are provided with heads 5 adapted to be passed backwardly through the slots or openings a and said heads are provided with necks 6 adapted to be dropped downwardly into the extensions a of the slots or openings a and by this means the bracket arm or arms Z) may be quickly and easily connected with and detached.

tudinal groove c, this groove extends from the heel portion of the arm, or from adja cent to the head 11 of the central part of said arm to. within a predetermined distanoe from the free end thereof, as shown at 0 and the heel portion 0 o' 'said groove is much'deeper than the rest thereof, and the bottom of said groove tapers in depth from the heel portion 0 to the outer end portion t 'ereof or to the outer end portion of thearm, as'clearly shown in Fig. 1. In forming the groove 0 a corresponding rib c is formed on the bottom of the blank c and in forming said groove and rib in the die mechanism, as hereinbefore described, the sides of the stripe are contracted or drawn in, as shown at c in Fig. 4, and this contraction or drawing in of the sides of the said strip or blank extends from the head portion of the arm at c to the outer endof the groove-c at 0 I also provide the ,heel portion of the arm with a heel reinthat shown in Fig. 6, and formed by means of a suitable die device or mechanism, as shown in Fig. 7, said, blank being bent into a U- shaped form "in cross section having side flanges (Z The blank (Z from which the heel piece cl is formed is preferably the same in thickness as the blank 0, and when formed in the manner described, the said heel piece is placed on back of the heel portion of the arm I), as shown in Fig. 1. and as is also shown in Fig. 8, and is welded to said arm, after which the arm is placed in a finishing or shearing die and sheared off along the la dh'tted lines :0 of Fig. 8, and so as to form the head 6 as clearly shown in Fig. 2.

When the heel piece has been applied, as shown and desribed, and the arm connected with the support a, said heel piece bears on said support and a bracket arm made as above described and as shown in the acof an inch thick and 10 incheslong will support over 200 lbs. at its outer end, andthis. is about four times as much as such' arms will support as usually constructed. It is also customary, in'practice, for work men, in going into and climbing out of manholes, to use the bracket arms that support cables, andin this waysaid arms are frequently broken down, thus causing great damage and frequently'causing injury to the workmen, but with my improved bracket armor arms made, and supported in the manner described, such accidents or results are obviated. Of course, the strength of the arm will depend upon the length there of and the thickness of the material employed in its construction, but the great strength of my improved bracket arm or arms-over other devices of this clam as usually constructed, is the result of the tapered groove 0 formed therein and the corresponding rib c on the back or bottom of the arm, it being also understood that the employment of the heel piece (Z also adds materially to the strength of the arm and the strain on the free end portion of the arm operates in the same manner as the strain on the arch. My invention is not limited however, to the heel piece (Z nor to the length thereof, but in all cases where the greatest possible strength is required in the arm, the heel piece (5 should be employed. It will be observed that the free end of the arm 6 is curved upwardlyslightly, as shown at If, and this result is produced at the same time that the groove and rib c are formed. 1

Havlng fully described my invention what I I claim as new and desire to secure by Letters Patent is A bracket arm of the class described the.

Vided with a heel piece which is welded to the bottom thereof and the form of which,

in cross section, is similar to the form of the heel portion of said arm, said heel piece being adapted to bear on the support ,of said, arm substantially as shown and do scribed.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this 30th day of January 1913.

FRANK P. KO'BERT. Witnesses:

G. MULREANY, ANDRE S,

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