US1358748A

US1358748A - Portable turntable

Info

Publication number: US1358748A
Authority: US
Publication date: 1920-11-16
Anticipated expiration: 1937-11-16

Description

O. L. JONES.

PORTABLE TURNTABLE.

APPLICATION mm APR. 24. 1920.

1 353,748; Patented Nov. 16, 1920.

2 SHEETS-SHEET 1'.

I N VEN TOR.

Oscme L. Jo/vzs,

A TTORNE Y.

0. L. JONES.

PORTABLE TURNTABLE.

APPLICAHON mm APE/24, 1920.

1,358,748. Patented Nov, 16, 1920.

. r 2 $NEET5SHEET 2.

IN VEN TOR.

%%A TTORNEY.

OSCAR L. JONES, OF PENNVILLE, INDIANA.

PORTABLE TURNTABLE.

Application filed April 24,

7 '0 all whom it may concern:

Be it known that I, ()soan L. JoNns, a citizen of the United Statesj residing at lenuville, in the county of Jay and State of Indiana. lave invented certain new and useful Improvements in Portable Turntables, of which the following is a specication.

This invention relates to a portable turntable which is particularly adapted for use bv street, highway and building contractors. lleretofore, in the accomplishment of the above class of work-the carting away of the excavation and the hauling of the building materialwhere usually there exists insulricient space for turning the wagon or .truck around either before receiving the load or after discharging the material hauled in, much time is lost. and annoyance caused by the uewssity of backing the vehicle to a point where there is sufiicient room to 'enable the vehicle to be turned around. In

the case of building a street, and especially in building highways in the country, wagons and trucks must ofttimes be backed a distance amounting to as much as a quarter of a mile before reaching a cross driveway or lane where there is suflicient space in which to turn the vehicle. so that much delay and congestion of truilic, with much loss of time and with a corresponding increase in expense and operation results.

)ne of the objects of the present invention is to provide a pm-table turntablc which can easily and conveniently be moved along as the work of excavating the street or highway progresses and likewise may be moved along in bringing in the building material as the construction of the road or is particularly advantageous to bu lding contractors during the erection of buildings in cities where ground space is usually limitcd, and where considerable dirt nuist he excavated and removed, and the hauling in of dill'erent kinds of building material as the construction of the building progreases. y

A further object of the invention consists in the provision of a turntable of the above character wherein the "mechanism -for rotating the turntable is set. into operation Specification of Letters Patent.

Patented Nov. 16, 1920.

1920. Serial no. 370,225.

through the power derived from the traction wheels of a motor truck without requiring the operator to dismount.

There are other objects of the invention which will appear from a perusal of the following description and claims, and which are attained by means of the construction illustrated in the accompanying drawings, forming a part hereof, in which Figure l is a top or plan view of niy improved portable turntable. Fig. 2 is a side elevation of the construction shown in Fig. 1. Fig. 3 is a cross section on the line 3-3 in Fig. 1. Fig; 4 is a longitudinal sectional view on the line 44 in Fig. 1, the inclines to the turntable being omitted. Fig. 5 is an enlar ed detail sectional view on the line 5-5 in ig. 1. Fig. 6 is a fragmentary detail view in side elevation of the resilient stop device. Fig. 7 isa view partially in elevation and partially in section, on the line 77 in Fig. 6. Fig. 8 is a fragmentary detail view in elevation on the line 8-8 in of angle iron which may be suitably con-' nected together at their ends by the cross beams 161:0 form a rigid structure, and passing transversely through the central ortions of the beams 15 is an, axle 17 w ieh ported longitudinally and at right angles to the plane of wheels 18 by means of the wheels 20 which are mounted upon shafts 21. The inner end of each shaft 21 is provided with a keyed bevel pinion 22, these latter pinions meshing with correspondin pinion-9 23 which are keyed to shafts 24, t a latter ion shafts having their hearings in the beams 15. Each end of each of the shafts 24 is provided with a fixed drum 25 through which'movement'of rotation is imparted by the traction wheels of the truck to cause wheels 20 to roll along rail 12 and automatically rotate the turntable for turning the truck or other vehicle around. Arranged parallel to each drum 25 is an idler drum 26, and. the recess formed between the convex surfaces of each pair of drums provides a depression for defining the operative positions of the traction wheels of the motor car/when transmitting power in rotating a pair of drums 25 secured to one of the shafts 24. for imparting movement of rotation to the turntable. diate the drums 26 is a pair of parallel channel irons 30 which form a track over which the. wheels. of the wagon or truck rolls, whenmoving upon or off of the turntabl It will be noted in examining 4 the the turntable is balanced upon sha t l? and wheels '18 so that when a wagon or truck is in position to cause the turntable to be rotated, wheel 20 adjacent the traction wheels of the motor truck alone will be in contact with rail 12, while the remaining wheel 20 on the opposite side of the turntable will be elevated free from rail 12. This arrangement removes any opposition to the normal movement of the turntable, which would result if both whecls 20 were simultaneously in contact with rail 12. \Vhen the turntable has 'moved a sufiicient distance-48o dcgrees-to completely turn the wagon or truck around further movement of the turn table is prevented by means of a fixed post 35, secured to the edge of the turntable com ing into contact with a pair of stops 36 which are arranged a sufficient distance apart on the outer surface of rail 12 to permit the turntable to alternately move 180 degrees. comprise large Lheadcd bolts which slide loosely through bosses 37 secured to rail 12. Springs 38 are inserted bctu 'ccn the heads and bosses 37 to form a cushion tormodify ing the effect 'of the impact of the parts when the turntable reaches the 'end of its rotary trai'e]. \Vlicn the truck has been con] etely t'urncd around to the point where fartlier movement is arrested. by means of a resilient stop BGQtheoperator immediately reverses the direction of movement of the traction wheels of the mu-1;, the latter moving backward off of the drums 25 and down incline 40 to a point where it is desired to dump or receive a load. At this time when ,the direction of movement of the traction wheels of the motor truck is in reverse to Arranged interme- As shown in Fig (i the stops 36 the end of the operation of dumping the load or receiving a load the movement is reversed toagain move the truck up incline 40. With a little practice the operator can so increase the speed of the motor truck in climbing incline 40 to secure the necessary degree of momentum to cause the traciion wheels to roll idly over the adjacent drums 25 without impartin movement of rotation to the latter, thereby holding the turntable against further movement. When the traction wheels have passed over drums 25. adjacent to incline 40, the operator may then shift his gear mechanism so as to-posltively drive the truck from the turntable,

for the reason that the drumsv adjacent to incline 41 are not affected bythecontact of the traction wheels, the latter being positively held against rotation at this time by means of hereinbefore described awl 42 and ratchet wheel 43. The'turnta le now being free of the truck is left in proper po sition 3 for receiving the next oncoming truck. The succeeding truck mounts incline 41 and moves forward on the turntable, in the manner as heretofore described, until the power wheels rest within the recesses formed by the opposing convex surfaces of the

drums

25 and 26 so that continued rotation of the traction wheels imparts the necessary movement and direction of rotation to the drums 25. for moving the turntable around. will be noted that the turntable during each period of operation moves but one-half of its circumference-180 degrees-and that such movements are not in the same direction but alternate. first in one direction and then in a reverse direction. I prefer'to impart an oscillatory instead of anintermittent forward movement to the turntable for the reason that I can more easily arran e the heretofore described stop devices for ringing the turntable to a state of rest in deter mined positions.

It will be noted that the opposite ends of the under structure are provided with stasections 50 form the approaches for the rotating turntable and enable (lose fittin joints to be formed between their ad'acen edges and the movable turntable. J hese fixed sections of the platform also provide the means for pivotally mounting the incline approaches 49 and 41.

While I have shown the portable turntable mounted on the sled runners 10, which construction l deem mostdesirable for the reason that a firmer base can be secured thanby mounting the under structure on wheels,

have no desire to limit myself to the use of sled runners. The portable character and convenience of the present invention is up 'is arrested, the turntable bein parent when taking into consideration its use 1n connection with specific kinds of work heretofore enumerated, and to enable the structure to be readily moved, I provide a particular kind of a hitch which consists of a rope or chain 55 extending from the free end of incline 41 and may be attached to a hook or other fastening device mounted on the end of a wagon or truck body A. Intermediate the ends of the rope or chain 53 I attach a second rope or chain 56 which extends to and connects with the adjacent ends of the runners 10 of the turntable structure. By means of this attachment, when the wagon or truck A. moves forward, the first action of forward movement, operating through rope or chain 55, elevates the free end ofthe incline 41 above the surface of the ground, after which the line of draft is transferred ,to the rope or chain 56 extend-' ing to runners 10 for moving forward the entire turntable structure over the surface of the ground. A

The operation of the apparatus is as follows: The motor truck moves up incline and upon the movable portion of the turntable until the rear traction wheels of the truck occupy the recesses formed by the convex surfaces of the

adjacent drums

25 and 26, and through the continued rotation of the traction wheelsmovement of rotation is imparted to -drums 25 in a. direction as indicated by the arrow on one of the drums 26 (-Fig. 1). Drums 25 are keyed to shaft 24, and the latter operating through bevel pinions 22 and 23' cause ooved wheel 20 which is in contact with rall 12 to roll along the latter and -move the turntable in the direction'indicated by the arrow at the top of Fig. 1. When the turntable has moved a distance equaling one-half of its circumference, 180 degrees, fixed post 35 comes in contact with one of the resilient stops 36 y "wheels for alternately rotating the turnwhereby further movement of the turntable V in position to permit the driver to back 0 of the turntable and down incline 40 to the point of either receiving or dumping a load. To permit the truck to back elf of the turntable necessitates a reversal of movement of the traction wheels, and when this reverse movement takes place drums 25 are held against movement of rotation by means of the pawl 42 and ratchet wheel 43 topermit the traction wheels to easily roll clear of said drum.

When the operator starts forward after .dumping or receiving a load he moves up incline 40 with suflicitnt speed so that he is able to throw his power transmission mechanism out of gear and ermit the momentum of the truck to carry t e latter idly over the adjacent drums 25 without imparting movement of rotation to drums 25 and the movable turntable. After the traction wheels pass over drums 25 adjacent'to incline 40,

wheels at this time by means of the pawl I 42 and ratchet wheel 43. \Vhen the truck is clear of the turntable the latter is in position to receive the next oncoming truck. The next truck travels up incline 41 and and upon the turntable with the traction wheels occupying the recesses between the

adjacent drums

25 and 26, the drums 25 referred to are at this time occupying a position at the left hand end of the turntable in Fig. 1. Under the continued movement of the traction wheels of the truck shaft 22 and

pinions

23 and 24 are rotated to rotate grooved wheel 20 in a direction to rotate the turntable in the opposite direction from "gears 23 on the same side of beveled pinions 22, as clearly indicated in Fig. 1.

Having thus fully described my invention, what I desire to secure by Letters Patcut, 15-- 1., A turntable of the character described, dri'vin means arranged near the opposite sides or rotating theturntable in opposite directions, and means for tilting said turntable and effecting the disengagement of all but one of said driving means.

2. A turntable of the character described, drivin means arranged near the opposite sides or rotati the turntable in opposite directions, an means for tilting the turntable and moving out of operative position all but one of said driving means.

3. A turntable of the character described, driving means actuated by the vehicle table in opposite directions, and means for tilting the turntable and disen aging and throwing out of operation all ut one of said driving means.

4. A turntable of the character described, driving means actuated by rotation of the vehicle wheels for alternately rotating the turntable in opposite directions, means ror tilting and throwing out of operation all ,but one of said drivin means, and means' for mounting and ren eringsaid turntable portable.

5. A turntable of the character described, driving means actuated by rotation of the vehicle wheels for alternately rotating the turntable in opposite directions, means for tilting the turntable and throwing out of operation all but one of said driving means, and means for arresting the rotational travel of the turntable in determined positions.

6. A turntable of the-character described,

operation all but one of said driving means,.

means for arresting the rotational travel of the turntable in determined positions and means for resiliently checking and goinpletely arresting the rotary movement of the turntable in determined positions. 10

In witness whereof I have hereunto set my hand and seal at Indianapolis, Indiana, this 21st day of April, A. D., one thousand nine hundred and twenty.

OSCAR L. JONES. [11. s.]