US1797543A - Stirrup and socket structure for trestles - Google Patents

Description

G. A. BRYAN 1,797,543

STIRRUP AND lSOCKET STRUCTURE FOR TRESTLES March 24, 1931.

Filed Feb. ll, 1929 Patented Mar. 24, 1931 UNITED STATES GEORGE A. BRYAN, or SPRINGFIELD, kILILrivoIs STIRRUP AND SOCKET STRUCTURE ron'frnnsrnns Application flied February 11, 1929.`vl serial No. 339,175. f

My invention relates to improvements in sockets for trestles such as are used by carpeuters,masons,plasterers,and other mechan ics. The present invention is a modification and improvement of the invention set forth in United States Patent No. 1,542,367 granted to me June 1G, 1925, for wrought metal socket Jfor legs or standards or the like.

The objects of my improvement are: first, to provide a complete pair of sockets pressed from a single sheet of metal and completed without welding any part of the structure; second, to provide a one-piece sheet-metal socket structure, pressed from a single blank,

I adapted to hold securely the legs of the trestle spread laterally relative to the beam, and also spread in the direction of the length of the beam; third, to provide acne-piece sheetmetal socket structure 'adapted for righthand attachment on the beam, and also adapted for left-hand attachment of the same socket structure on the same beam, without any change in the socket structure itself; fourth, to provide a one-piece sheet-metal Ii D '2 unitary stirrup and socket structure (not to scale); Fig.V 2 is a plan view of the sheetmetal blank from which the unitary structure is formed and completed; Fig. 3 is a top view of the partly formed structure, approximately as it appears after the first pressing of the sheet-.metal blank; Fig. 4 is a top view of the completed structure; Fig. 5 is a fragmentary end view of a trestle, showing the beam in place inthe stirrup and the legs in 7 )lace in the sockets Fig. 6 is afra mentar side view of a trestle, at one end thereof, showing the beam and legs in place.

Similar numerals refer, to similar parts throughout the several views. v

My stirrup and socket structure is made socket structure pressed from a single square from a single rectangular piece of sheetmetal. It is 4formed and completed without welding anypart'of the structure at -any'stage of the construction. Different gauges of sheet metal;v may be used, according to the size of sockets y and the use intended'.V

A typical socket structure of convenient n th'ejlines19, 20.5 The result of'thi'sjoperation if is *app)roximatelyA shown in 3.

The second "pressing-'operation consists in bending theside members upward, on the lines 21 and`r22. l'Ihistresults inthe iinished article as shown in plan byFig. `4:,in end elevation byl Fig. 5, and inside Velevation by Fig.6. i 'y *y In its completed form,- the structure consists of two socket members 23, having inte-, v gral flanges' 24, joined at the bottom by plates 25. Thelflanges24 and bottom plates 25 form two stirrupsrin lwhichthe beam 26 of the trestle rests. `The bottom of each stirrup' is secured to ythe 'beam'Y by a wood screw. 28 which passes through hole V13. The stirrup and socket structure is prevented from spreading by the bolts 29 which are accom'- r 4modated in the holes-14 and pass through the beam at pointsnearervthe top than the bottom Vof the stirrups. Y Y

The side walls 30 ofthe socket members 23 are inclined outwardly from the Vertical sur-y face of the beam, to provide the proper' spread of the legs, as shown in Fig. 5. The two end walls 31 and 32 of a given socket member are not parallel, but are inclined with` respect to eachother, tol form a tapered socket; and

the center-line bisecting the angle between these two end walls is inclined lengthwisev of 'the beam asshown at 33 in Fig, 6.

The present unitary socket structure is dened as universal in the sense that it is adapted for selective placement at either end of the beam, thus obviating the necessity for making either the socket elements or the legs `What I claim as new and desire to secure i by Letters Patentl is: y

1. In a unitary stirrup and socket structure, the combination of: a pair of'stirrup members having substantially parallel Hat side elements with sloping edges; and a pair of socket members having flat longitudinal side Walls shorter at the top than at the bottom, -and substantially flat transverseV end' walls trapezoida-l in shape with top and bottomfedges upwardly sloping from the side elements of said stirrup members; all adapted to be formed l-y bending alat rectangular sheet-metal blank. f r

2. A unitary stirrup and socket structure for the attachmentjof legs t'o the beam of a trestle, comprising: tWo tapered socket members adapted to receive blunt-topped legs tapered on three sides, and adapted Vto permit the tops of sai'd'legs to'protrude 'above saijd socket members, the said socket members having three tapered sides, each ofwhich en-` gages 'a tapered lsideof saidlegs; horizontal 'Hat members underlyingl thebeam of the trestle; and upright members having aligned holes adapted `to 'receive fbolts extending through said upright'members and through said beam.` Y l 3. A Wrought metal "stirruzr and socket structure for trestles comprising: apair of tapered socket members having 'end Walls of trapezoi'dal form inclined toward each other andi having theirtop and'bottom edges up. wardly inclined from the beam ofthe'trestle perforatedx'fertiealwings integral With and Y Y extending outivardlyfrom the respective end Walls; horizontal `connecting elements integral With the respective Wings; and a pair of bolts adapted topass'through thebeam and thel perforations in vsaid Wings. i

signal afsplingele, ruinoiaaiis mi day of February', 1929.7 'i A i t Y Y GEORGE A BRYAN

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