US2261217A - Trestle - Google Patents

Description

Nv. 4, 1941. C. H. BOND 2,261,217

TRESTLE Filed Oct. 2l. 1959 2 Sheets-Shea?l 1 lhmentor CZinar?. f7. Bond,

Y ttor-neg NOVA, 1941. .H BOND 2,261,217

TRESTLE Filed 0011221, 1939 2 Sheets-Sheet 2 nvenfor CZi'nan H. .59nd,

Patented Nov. 4, 1941 UNITED srariss i HPATE Nr i ori-"ICE y l -ilms'rr-,li Clinton H. BoyndQCedar Falls, Iowa, assignorf to l Wagner Manufacturing Company, Cedar Falls, Iowa, a corporation of Iowa Application October 21, 1939, .Serial No. ,300,680 A 2 claims. (o1. soi-5) lMy invention relates to uimprovements in trestles, and an object of my improvements is to furnish in such a device, a like associated Vpair of medially hinged legs or standards, with. upper terminal and cooperating gripping means for a wooden beamseated between them forl penetration thereof at opposite sides, and with laterally oppositely directed parallel clamping members to embrace the beam between them to prevent looseness or rocking movements between the terminations of the beam and the clamping members.

Another object is to locate pluralities of such penetrating means above and below said clamping'members respectively, to reinforce each other in combination with said members to together assure rigidity of the joints between the beam ends and said penetrating and clamping devices.

I have in actual practice accomplished the above purposes, and by the means which are hereinafter illustrated in the accompanying drawings, described in the specication and claimed in the claims.

Fig. 1 is an end elevation of one of the'trestle supporting devices with the lower parts of its limbs spread apart by limiting collapsible connections, and with their upper gripping and penetrating parts rigidly seating between them terminally an end of a wooden reach or beam, releasably. 4

Fig. 2 is a like elevation of one of the supporting devices as collapsed. Fig. 3 is a side elevation of one of the limbs, with upper end contacting a beam part. Fig. 4 is an inner face elevation of one of the limbs. Fig. 5 is a plan view of the under face of one of the at discoidal terminations of the limb ends. Fig. 6 is a modication of the arm hinging means.

Referring to said Figs. 1 and 2, the numerals I and I a, denote like but relatively reversed leg members, preferably as shown inwardly troughed of metal for lightness and rigidity. To prevent injury to a floor or subsidence into an earthy base, these leg members are provided with at discoidal bases 2 and 2a. respectively, alike, but the lower ends of the troughed leg members are beveled, so that when the legs are spread apart as in Fig. 1, the parts 2 and 2a are in horizontal alinement.

The leg members I and la are preferably hingedly connected together substantially medially of their length, by arm sections 3 and 3a thereacross, having their outer ends pivotecl to these members as at 4 and 4a. The inner ends of the members overlap and are connected by a bolt and nut'v at the` latter having Vopposite arms 9. As shown'in 2, when the members I'yand Ia are broughtinto close proximity, a rectangular notch Shin thejarm 3a seats within it alfixed pin`3c'on theI other arm member 3. y WhenV the members Al A'anal-Icare spread apart horizontally against downward subsidence.

The upper parts of the members I and Ia are pivoted'together at 5 at overlapped shoulders. Above the shoulders the side walls of I and Ia are cut back and shaped along their opposed edges with medial projections 6 and 6a, in alinement at right angles with said members projecting` oppositely and have holes 6b (see Figs. 3 and 4) through which nails or screws may be passed if necessary. Above and below these projections 6 and 6a the inner edges of the members have pluralities of teeth 'I and 'Ia respectively. In Fig. 1 is shown an end part of a horizontal 4wooden beam I0 which seats in the hollow of the members I and Ia of a spaced pair of the devices, whereby when the members I and Ia are spread apart below, the teeth 'I and Ia penetrate the opposite sides of the beam Il), at the same time that the iiat projections E and 6a compressingly contact flatly with the opposite side faces of the beam. These projections in extending oppositely along the beam, prevent rocking of the members in said seat, so that the teeth and projections together stabilize the ends of the beam in the seat. The trestle thus supplied will sustain'heavy loads, and resist torsional strains Whilein use, without coming apart.

If desired, a pad, flat or cupped, made of rubber or other yielding material may be seated about the discoidal terminal parts 2a to prevent scratching of a floor or sliding of the device.

The trestle thus supplied will supportitself under strain in use,4and the end devices when removed from the beam, may be collapsed and stacked in small compass for storage or transportation, or used together with another beam.

In Fig. 6 is shown a modication of the hinged joint between the arms 3b and 3c. The inner ends, overlapped, of said armslare pivoted together by a pintle I I. Semicircular notches I3 and Ia are provided in the lower edges of arm 3c equidistantly oppositely from the pintle H, and a short stud l2 is nxed on the amfsb to extend into the notch I3 on the arm 3c when the legs I and Ia are spread apart, thus locking the arms together beyond a dead. center, and against collapsing or subsiding downwardly.

When the legs I and la are collapsed together, the stud l2 seats in the notch I3a, whereby the legs l and la are locked in their upward position. The stud l2 is short, flat, and the stud springs into either notch position due to the resiliency of the arms permitting enough spreading to allow the stud to spring into either notch when the legs are either extended into alinement, as shown in Fig. 6, or when the legs are brought together, respectively.

In Fig. 6, I have shown also, disks of rubber or other substance of yielding character at 2b secured on the discoidal metal feet 2 and 2a by rivets or other means of fastening. The pads thus furnished may be of any Vother shape desired, and may be of larger diameter than the feet 2 and 2a, or may be secured upon said feet by inturned rims or other means.

I claim:

1. In a device of the character described, a

body between them, and hinging arms whose outer ends are pivoted respectively to opposite medial parts of said members and having their inner ends overlapping and pivoted together, one arm having downwardly opening recesses positioned at opposite sides of their pivotal connection and equidistantly therefrom, and a stud on the other arm spaced from said pivot and adapted to enter one or the other recess when said leg members are either spread apart beyond a dead center, or when the arms are collapsed together upwardly.

2. In a device of the character described, a

` beam, a pair of leg members having their upper parts pivoted together a distance below their terminations, said terminations having spaced serrated facing edges for gripping the beam between them, said members having apertured oppositely directed alined wings, clasping the opposite upper parts of the leg members between them, hinging arms whose outer ends are pivoted respectively to opposite medial parts of said members with their inner ,ends overlapping and pivoted together beyondor on a dead center, the lower part of one arm ,having spaced recesses at opposite sides of and equally spaced from the pivotal connection, and a lateral stop on the other arm releasably seating in the outermost recess of the rst arm when both are extended.

CLINTON H. BOND.

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