|Publication number||US1586254 A|
|Publication date||May 25, 1926|
|Filing date||Nov 14, 1924|
|Priority date||Nov 14, 1924|
|Publication number||US 1586254 A, US 1586254A, US-A-1586254, US1586254 A, US1586254A|
|Inventors||Lovejoy Alfred A|
|Original Assignee||Lovejoy Alfred A|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (8), Classifications (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
May 25. 1926. A. A. LOVEJOY SEESAW FiledNov, 14. 1924 Patented May 25. 1926.
UNITED STATES PATENT OFFICE.
.AIJ'BED A. LOVEJOY, 01 SOUTH BEND, INDIANA.
Application filed November 14, 1924. Serial No. 749,888.
in such manner that adjustment of the board for different weights or heights of persons may bejeffected without materially changing'the normal angle of inclinations. of the board or see-saw per se. 1
With these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.
In the accompanying drawings,- Figure 1 is a view partly in elevation and partly in section showing an embodiment of my invention, and Figure 2 is a plan view partly broken away.
y improved see-saw structure includes a base frame 1 which may be provided with rubber knobs or feet 2 located adjacent to respective ends thereof. Secured upon the base frame 1 near respective sides thereof and in proximity to one end, are plates or bars 33 each having elongated slots 4. The base portion of standards 5 are located u on the plates or bars 3 and are adjusta ly secured to the latter by means of headed "screws 6 and thumb nuts 7,
whereby said standards may be adjusted in directions arallel with the longitudinal" axis of the use frame 1 for a purpose hereinafter explained.
The see-saw board is shown at 8 and has secured to it's'under face to one side'of the longitudinal center of the board, a bearing plate 9,4-0118 of such bearing lates being located in proximity to each si e edge portion of the board. The bearing plates 9 are provided with elongated slots 10 for the pas sage of headed screw boltsll, said bolts alsopassing through the board 8 and re-' ceivi ng'; thumb nuts 12 at their lower ends, washers 13.v being located between said thumb nuts and the under faces of the plates 9. The plates 9, which are thus adjustable relatively to the board, are provided intermediate of their ends with depending perforated enlargements 14. Vertically disposed, threaded bars 15 pass through the upper portions 16 of the standards 5 and 'screw 25 passes, said screw also through cross-bars 17 in said standards and are retained at any desired vertical adjustment by means of nuts 18 and 19.- The threaded bars 15 are provided at their upper ends with perforated heads 20- which align with the perforations of the depending enlargements 14 for the passage of a transversely disposed fulcrum rod 21, and in this manner the see-saw board is pivotally supported upon the vertical threaded bars 15. An eye 22 is secured to the board 8 near the forward end thereof and to this eye one end of a counter-balancing spring 23 is attached. The, lower end of this spring has secured thereto a nut 24 through whlch a passing through the base 1 and having a head 26 at its lower end countersunk into the said base frame, and a clamping nut is located on said screw and engages the upper face of the base-frame 1. The rear end portion of the board 8 provides a seat 27 for which a back and hand hold 28 is provided.
The base 29 of a post 30 is secured upon the board 8 in front of the seat ortion 27 thereof'and to the upper end portion of this post a. handle bar 31 isclamped or otherwise secured. The board is also provided forwardly of its seat portion with stirrups or foot rests 32.
With my improvements the see-saw board- 8 may be read ly adjusted through the medium of the vertical-threaded bars 15 to accommodate children of different heights and when thus adjusted, the connection of the spring 23 with the base frame may also be adjusted so as to maintain the proper angle of inclination'for the board. By adjusting the standards 5 and their connec-- tions with the base frame and the board 8 in directions toward one or the other end of the frame and board, the latter may be adapted for use of children of different weights Without necessity of changing the tension of the counterbalancing sfrin 23 and without changing the angle 0 inclination of the board to an appreciable extent. To avoid changing the angle of inclination to any extent when the adjustments above mentioned are made, the connection of the.
spring with the base frame may be slightly adjusted.
Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is I '1. In a see saw, the combination of a base member, bars secured on the base longitudinally thereof .and provided with longitudinal slots, standards resting on said bars, fastening devices carried by the lower ends of the standards and engaged through the slots in said bars, threaded bars fitted in the standards to be adjusted vertically, a seesaw board, plates secured to the bottom of the see-saw board and adjustable longitudinally thereon, pivot connections between said lates and the upper end of the threaded ars, and a spring connection between one }95nd of the see-saw board and the basemem- .2. In a see-saw, the combination with a base member, and a see-saw board, of bars secured on the base and'disposed' longitudinally thereof, standards resting on said bars, means tor securing the standards to the bars at selected points in the length of thebars, threaded bars fitted in the standards to be adjusted vertically, slotted plates adjustably secured to the see-saw board,v
pivot connections between said slotted plates and the vertically adjustable bars, and a sprin between one end portion of the board In testimony whereof, I have signed this specification.
ALEBED A. LOVEJOY.
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