US1209881A

US1209881A - Teeter-board.

Info

Publication number: US1209881A
Application number: US10762816A
Authority: US
Inventors: George Stephen Polley
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-05
Filing date: 1916-07-05
Publication date: 1916-12-26
Anticipated expiration: 1933-12-26

Description

G. S. POLLEY.

TEETER BOARD.

Atto rnys@ G. S. POLLEY.

TEETER BOARD.

APPLICATION FILED IULY 5. i916. l 209 l. Patented Dec. 26,1916. I, g 2 SHEETS-SHEET 2` Witnesses lnven'cox;o

. d l y '/.f/ I by www Mural Y Attorneys a Y WEEE@ STATES PATENT FFQE.

GEORGE STEPHEN POLLEY, 0F ASI-ITABULA, OHIO.

TEETR-BOARD.

To all whom it may concern: A

Be it knownthat I, GEORGE S. PoLLEY, a citizen of the United States, residing at Ashtabula, in the county of Ashtabula and State of Ohio, have invented a new and useful Teeter-Board, of which the following is a specification. j

The present invention appertains-to teeter boards or seesaws, and aims to provide a novel and improved deviceof that character.

It is the object of the invention to provide a teeter board or seesaw which is substantial in construction and which is adjustable to various vertical heights.

Another object of the invention is the provisionvof a teeter boa-rd having novel means forcontrolling the equilibrium and operation thereof, whereby to enhance the utility of the device for the amusement, entertainmentand exercise of children.

A further object of the invention is ythe provision vof novel means for counter balancing the vdevice when the persons at the opposite ends are of different weights.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein ldisclosed can be made within the scope of what is claimedv without departing-from thespirit of the invention.

The invention is illustrated in the accompanving drawings, wherein:

, Figure 1 is a side elevation of the improved teeter board. Fig. 2 is a diagrammatical side elevation illustrating the lever arrangement for the over balancing weight. Fig. 3 is a fragmental plan view of the device, portions being removed. Fig. 4 is a vertical section taken on the 'line 1 -4 of Fig. 3. Fig. y5 is a detail view illustrating a means for adjusting the axleA vertically.

, The teeter board proper or rocking member embodies a pair oflongitudinal bars 1, which are mounted intermediate their ends upon a pipe or tubular bearing member 2 disposed transversely and mounted for rotation upona transverse axle rod 3 terminally supported by a pair of standards or posts 4 carried by a suitable base 5. The standards 4 have vertical series of apertures 6 for the Specification of Letters Patent.

Patented nec. 2o, raie.

Application ined July 5, 1916. serial no. 107,628.

reception of the terminals of the axle rod 3, whereby the axle rod can be adjusted vertically for supporting the teeter board in various vertical positions. Thebars 1 are connected by tie rods 7 and have disposed therebetween spreaders or spacers 8 against which the bars 1 are clamped by the tie rods 7, and braces 9 are preferably disposed between the bars 1 for reinforcing the structure.

In order to truss the bars 1, vertical bars or truss members 10 are fitted upon and secured to the bars 1 intermediate their ends and adjacent the axle, as at 11, and the lower ends of the bars 10 are connected by a cross ends of the bars 10. The

truss elements

15 and 16 can be rods, wire, or the like, and in connection with the bars 10 serve' to thoroughly truss the rocking member.

Suitable seats 17 are disposed between the opposite ends of the bars 1 Aand are pivoted or fulcrumed thereto, as at 18, and said seats are provided with backs 19 and with depending arms 20. The arms 20 are connected b v the links 21 with the lower arms of pairs of levers 22 fulcrumed or pivoted` as at`23, to the bars 1 in front of the seats 17 which face toward 'the center of the structure. Foot boards 24 are secured upon the links 21 and provide a foot rest for each seat 17. The seats andlevers 22 are thus linked' together to swing in parallelism. VThe pairs of links 21 are connected b v pairs of links 25 with pairs of ,levers 26 lfulcrumed, as at 27, to the bars 1 between the seats and center of the structure. A pendulum 28 is mounted loosely upon the tubular bearing 2 between the bars 1 for swinging or rocking movements between said bars towardy and away from the seats, and the upper and lower arms of the pendulum 28 are connected by links 29 with the levers 26. The lower end of the pendulum V'28. carries a suitable over-balancing weight 30 controlled by the seats 17 and levers 22. j

Buffer springs 31 are. preferably secured to the' ends of the bar 1 to 'contact with buffer plates 82 upon the ground or iioor, whereby to avoid shocks due to the ends of the board striking the ground or floor.

As a means for obtaining the balanceof the rocking member should the persons seated upon the seats 17 be of `unequal weights, a pair of tanks-'33 for holding water or otherliquid is mounted between and carried by the bars 1, said tanks being carried by the opposite arms of the rocking member at opposite sides of the fulcrum or axle thereof. The bottom portions of the tanks 33 are connected by a pipe 34 provided with a valve 35 having the controlling arm 3G, land cords or other operating elements 37 are attached to said arm 36 and extend to the seats, A'being preferably -connected to certain of the levers 22 whereby the cords can be readily grasped for operat- 39 for a shaft 40upon .which cables 41 water to iow winding the cables upon or unwi ing the valve. The tanks k3L", are partially filled with water or other liquid, and to balance the rocking member, this can be done when the lighter arm thereof is lowermost, by o-pening the valve 35 to permit-thc from the uppermost to the lowermost tank until a balance is obtained, in which event the valve 35 is closed. Said valve can be readily operated from the seats 17 by means of the cords 37.

As a convenient meansl for adjusting the axle to raise or lower the rocking member, straps 38 are secured upon the upper ends of the standards 4 and are provided with seats are secured and adapted to be wound. Said cables 41 have hooks-42 engageable-with the axle, and the shaft 40 has a crank 43 at one end whereby it can be rotated by either ding them from the shaft 40 Jfor raising or lowering the axle. The shaft 40 can be readilyapplied to the standards, and when its useV has passed, it can be readily removed.

In operation, supposing the children to be seated upon the seats 17 with the lrocking member properly balanced, when the rocking member is in horizontal position, the pendulum 28 will be 1n vertical' position,

with the over-balancing weight 40 below the axle of therocking member, and with the levers 26 and 22 las well as the arms 2O vertical. The equilibrium ofthe rocking member is destroyed 'by themovement of the` weight 30, assisted by the movements of the operators in the ordinary manner. Thus, supposing that the foot boards 24 at vthe lett hand end are moved inwardly while the foot boards at the right hand end aremoved outwardly, the motion will be transmitted by means of the links 25, levers 26 and links 29 to the pendulum 28, and the over-balancing weight 30 will be moved toward theleft,

thus over-balancing the left arm of the rocking member, wherebyV theleft arm. will swing downwardly to raise the right arm, it being noted, in this connection, that during this movement ofthe rocking member, the left hand seat 17 will swing outwardly, while the right hand seat will swing Ainwardly so that the shifting of the bodies oli the operators will assist in the swinging movement of vthe rocking member.

of such movement, the movement ofthe foot boards 24 is reversed, and they are shifted toward the left, thereby moving the counter balancing weight 30 to the.right, and the seats 17 swinging toward the-f right, will shift the greatest weight tothe right arm of the rocking member, lwhereby to check the movement of the rocking member, to avoid asudden jar by the left arm thereof striking the ground, and the nmovement of the rocking member will be reversed so ythatthe right arm moves' downwardly while the left arm is raised. Thus, bythe operation of the foot boards 24, the rocking member is tilted irst in one direction. and then in the other. The operationfof the Yover-balancing weight can be conveniently effected bythe operators resting against the backs of the seat and pushing with their feet against the foot boards 24, to swing the backs 19 outwardly and force the foot boards 24 inwardly, and the operators can grasp the upper arms of the levers 22 to swing said levers to assist in the operation yof the device.

The ends of the rocking member can-be provided with'extra seats if desired, and the rocking memberV can be providedfwitha runningl board extending from oneseat to the other for convenience in permitting the children to conveniently mount the device.

Having thusdescribed the invention, what is claimed as new is: -Y

1. A teeter device embodying fa pair of standards, a vertically adjustable vaxle carried thereby,l a rocking member mountedbetween its ends upon-said axle, the upper ends of said standards having seats, a winding memberseatable in said seats, and cables attached to saidwinding member and having means for engaging the axle, lsaid winding member being removable.

loo

2. A teeter device embodying a rocking l member fulcrumed between its ends, seats movably carriedby the ends of said member, an over-balancing weight movable toward and away from the ends of-said member for over-balancing the arms thereof, and means for .operatively connecting said weight and seats.

3. A teeter device embodying a rocking -member fulcrumed between its ends, seats carried by the ends of said member, a pendulum having an over-balancing weight and mounted-adjacent the fulcrum vof said member, said weight being movable toward and away from the ends of said member, and means for operating said pendulum from the seats.

4. A teeter device embodying a rocking member fulcrumed between its ends, seats pivoted to said members adjacent the ends thereof, an over-balancing Weight movable toward and away from the ends of said member, and operative connections between said seats and weight for moving it.

5. A teeter device embodying an axle, a rocking member mounted upon the axle between its ends, seats pivoted to said member adjacent the ends thereof, a pendulum carried by` said axle and having an over-balancing weight movable toward and away from the ends of said member, and operative connections between said seats and pendulum.

6. A teeter device embodying a rocking member fulcrumed between its ends, an overbalancing weight movable toward and away from the ends of said member, seats pivoted to said member adjacent the ends thereof and having downwardly projecting arms, levers pivoted to said members adjacent the seats, foot rests pivotally connected with said arms and levers, and operative connections between said foot rests and weight.

7. A teeter device embodying an axle, a rocking member mounted between its ends upon said axle, a pendulum carried by said axle and having an over-balancing weight movable toward and away from the ends of said member, seats pivoted to said member adjacent the ends thereof and having downwardly projecting arms, levers pivoted to said members adjacent the seats, foot rests pivotally connected with said arms and levers, and operative connections between said foot rests and pendulum.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

GEORGE STEPHEN POLLEY.

Witnesses:

WHITNEY CARR, G. F. FERGUSON.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D C.