US802741A

US802741A - Trussed board or support.

Info

Publication number: US802741A
Application number: US17470503A
Authority: US
Inventors: John J Dennis
Original assignee: EDWARD T FILER
Current assignee: EDWARD T FILER
Priority date: 1903-09-26
Filing date: 1903-09-26
Publication date: 1905-10-24
Anticipated expiration: 1922-10-24

Description

PATENTED OCT. 24, 1905,

J. J. DENNIS. TRUSSED BOARD 0R SUPPORT.

APPLICIATION FILED SEPT. 26, 1903.

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ON E-HALF TO TIET EDWARD T. FILER, OF CHICAGO, ILLINOIS.

TRUSSED BOARD OR SUPPORT.

Specification of Letters Fatent.

Patented Oct. 24, 1905.

Application filed September 26,1903. Serial No. 174,705.

in a, whont it Til/(Ly concern.-

Be it known that I, JOHN J. DENNIS, a citizen of the United States, and a resident of Chicago, Oook county, Illinois, have .invented certain new and useful Improvements in Trussed Boards or Supports, of which the following is a specification.

This invention relates to a new article of manufacture consisting of a jointed truss structure particularly designed and adapted for use as scaffold boards, circus seats, shelves, ladders, and the like.

Primary objects of the invention are to provide a stucture for the designated and similar uses which will combine the features of great strength and lightness and which may be folded so as to occupy a comparatively small space, thus providing for conveniently carrying and storing the same.

Broadly stated, my invention may be described as a folding truss structure comprising a jointed tie member, tension and com pression members pivotally connected to each other, one of which is pivoted to said tie member, and means to secure the other thereof to said tie member at opposite sides of the oint therein.

The invention also consists of the various features, combinations of features, and details of construction hereinafter described and claimed.

In the accompanying drawings, in which :my invention is shown as embodied in a scaffold-board, Figure 1 is a side view of a scaffold-board embodying my invention, showing the same extended. Fig. 2 is a bottom plan view thereof. Fig. 3 is an enlarged sectional elevation. on the line 3 3 of Fig. 1. Fig. 4- is an enlarged detail view. Fig. 5 is a side view of the scaffold-board in folded po sition; and Fig. 6 is a plan view of the said scaffold-board folded, showing the truss members in dotted lines.

A structure, scaffold -board, circus seat, shelf, ladder, or other article embodying my invention comprises sections 1 and 2, hinged or articulated to each other, so that they may be folded together. When extended, said sections together form what may appropriately be described as a jointed tie member of a truss structure. Pivoted to the under side of said tie member, preferably at the hinge thereof, is a compression memher 3.

is obvious that the sections 1 and 2 and the compression member 3 will all be pivotallv movable about the same point. lvotally connected to the outer end of the compression member 3 are tension members 6 and 7, the opposite ends of which are adapted to be connected to said tie member at opposite sides of and against movement toward the pivotal point of said sections 1 and 2.

In the preferable construction shown the outer ends of said tension members 6 and 7 are pivoted 'to rods 8, provided at their outer ends with sleeves 9, which. engage guide-rods 10, rigidly secured to the under side of said tie member. The outer ends of the guiderods 10 may be secured to said board or tie member in any desired manner. The inner ends thereof are threaded or otherwise secured in holes or openings formed in plugs 11 said plugs 11 being threaded to suitable holes or openings in said board or tie member so as to be rigidly secured therein and to project a desired. distance at the under side thereof.

The relation of parts is preferably such that when the sections 1 and 2 of the board or tie member are fully extended the sleeves 9 will rest in contact with the plugs 11., which will thus form stops limiting the movement of the outer ends of said tension members 6 and. 7 inwardly and will thus operate to support said sections 1 and 2 in extended position with their upper surfaces substantially level.

To provide for folding the sections 1 and 2 of the tie member closely together, the tension members 6 and 7 are disposed out of alinement with each other, and one of said tension members, as shown the member 7, is longer than the other, the relation being such that when. the sections 1 and 2 are in folded position the tension members 6 and 7 will lie side by side and the rod 8, to which the outer end of the tension member 7 is at tached, will extend beyond the outer ends of the guide rods 10, to which the tension member 6 is connected. Suitable means are also provided to secure the sections 1 and 2 of said board or tie member in extended position against accidental folding, as in handling. As shown, said means consist of spring-clips 12, secured to the under side of said tie member and adapted to engage the rods 8 to which the outer ends of the tension members 6 and 7 are pivoted.

I claim as my invention- 1. As an article of manufacture, a scaffold board or the like, comprising a support formed of hinged sections, a compression member, pivots connecting said sections to each other and to the compression member, guide-rods secured to the sections of said support, tension members slidably connected to said guide rods at one end and at the other pivoted to the outer end of the compression member and stops which limit the inward sliding movement of said tension members on said guide-rods, substantially as described.

2. As an article of manufacture, a scaffold board or the like, comprising a support formed of hinged sections, pivotally-connected compression and tension members, said compression member being pivoted to the under side of said sectional support, guiderods secured to said sectional support, slidable connection between said tension mem bers and said guide-rods and stops which limit the inward sliding movement of said tension members on said guide-rods, the opposite tension members being disposed out of alinement with each other.

3. As an article of manufacture, a scaffold board, or the like, comprising a support formed of articulated sections, pivotally-connected compression and tension members, said com ression member being pivotally connecte to the under side of said sectional support, guide-rods on said sectional support, slides mounted on said guide-rods to which the outer ends of said tension members are connected, and stop-plugs or projections attached to said support to which the inner ends of said guide-rods are secured, substantially as described.

4. As an article of manufacture, a scaffold board, or the like, comprising a support formed of articulated sections, pivotally-connected compression and tension members, said compression member being pivotally connected to the under side of said sectional support, guide-rods secured to said sectional support, slides mounted thereon, connection between said slides and said tension mem bers, and stops which limit the movement of said slides, the opposite tension members being disposed out of alinement with each other and one thereof being longer than the other, the relation being such that when in folded position the slide to which the longer tension member is connected will extend outside of the guide-rods to which the shorter tension member is connected, substantially as described.

5. As an article of manufacture, a scaffoldboard, or the like, comprising a support formed of articulated sections, pivotallyconnected compression and tension members, said compression member being pivotally connected to the under side of said sectional support, and said tension members being slidingly connected to said sectional support, stops which limit the sliding movement of said tension members inwardly, and means located adjacent to said stops to secure said tension members against outward movement, substantially as described.

6. As an article of manufacture, a scaffoldboard, or the like, comprising a support formed of articulated sections, pivotallyconnected compression and tension mem bers, said compression member being pivotally connected with the under side of said sectional support and said tension members being slidingly connected to said board, stops which limit the sliding movement of said tension members inwardly and springclips secured to the under side of the support for securing said tension members against sliding movement outwardly, substantially as described.

7. As an article of manufacture, a scaffold board or the like, comprising a support formed of hinged sections, a compression member consisting of a bent rod, the bent ends of which form the pintles of the hinges connecting the hinged sections, guide-rods secured to the sections of said support and tension members pivoted at one end to the 1 JOHN J. DENNIS.

Witnesses:

EDWARD T. FILER, XV. H. COTTON.