US1116671A

US1116671A - Truck.

Info

Publication number: US1116671A
Application number: US80715713A
Authority: US
Inventors: Ewan Cameron
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-12-17
Filing date: 1913-12-17
Publication date: 1914-11-10
Anticipated expiration: 1931-11-10

Description

E. UAMERUN,

TRUCK.

APPLICATION FILED n30.17.1913.

Patented NW. 10,1914.

Inventor Swan ea 0 K a a j a Attorneyl.

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TED STATES PATENT OFFICE.

IEWAIN' CAMERON, OF WASHINGTON, NEW JEMEY, AfiSIGNOR TO JOHN ROBERT TAYTMR, O]? BROOKLYN, NEW YORK.

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To all whom it may concern:

Be it known that T, Ewan CAMERON, a citizen of the United States, and a resident of Washington, Warren county, and State of New Jersey, have invented a certain new and useful Truck, of which the following is a specification.

This invention relates to trucks of the type which are adapted to be used with platforms, said platforms having tops and sides. These platforms are employed in quantities in factories, store-rooms, etc. The truck is adapted to be wheeled under the platform and a sub-frame on the truck is elevated, raising thesides of the platform from the floor. The truck, with the platform, is then wheeled to the position desired and the platform lowered until the sides thereof rest upon the floor, and then the truck is wheeled out from under the platform.

The objects I have in view are to simplify the construction of this kind of truck, to make it more useful by being; made capable of turning in a circle of small radius, to make its operation more easy by having the operating parts for raising and lowering the platform within reach of the operator so that he can actuate the same without bending down, and to form an automatic and efficient lock for holding the platform in elevated position. These and further objects will more fully appear from the following specification and accompanying drawings, considered together or separately.

The drawings illustrate one embodiment V of the invention.

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In the drawings: Figure 1 is a front elevation'of a completed truck showing a platform thereon, the sub-frame being in elevated position. Fig. 2 is a section of the same on the line of Fig. 1. Fig. 3 is a plan view of the device, but with the platform removed. Fig. 4 is a section on the line li of Fig. 1, but on an enlarged scale, showing the details of the elevating and locking mechanism; and ltig. 5 is a section on the line 5 5 of Fig. 4-, showing the details of the sub-frame elevating devices.

lin all of the views, like parts are designated by the same reference characters.

'lteferring to the drawings, n: represents the top of the platform, and 7) represents the sides of the same. This platform made preferably of wood of such a size and,

specification of Letters Patent.

Application filed December 17, 1913.

Patented Nov. 10, 1914. Serial No. 807,157.

height that the truck may be wheeled under t, and the sub-frame being elevated above the main part of the truck will lift the platform clear of the floor. The articles to be transported are either piled directly on the platform or are arranged in trays or other supports carried by the platform.

The truck comprises a frame 1 and a sub-frame 2. The frame is made as follows: It has a'lower horizontal angle frame 3, rectangular in plan. Above this frame is an upper horizontal angle frame f of the same size and shape. At one end, designated in this specification as the front end, is a vertical frame 5. The upper part of this frame is of such a height that the operator can take hold of it, and without bending, can push or pull the truck and turn it around. The frame has caster supports 6, 6 at each end. Upon these supports are casters 7, 7. On the middle of the frame, half way between the casters, are the

side wheels

8, 8. These wheels are supported upon a shaft 3.1, and the shaft is supported in brackets 9. Between the upper and lower horizontal frames are

shaft bearing plates

10, 10. These plates serve to hold the upper and lower frames in position with relation to one another. The frames are also held together by means of the caster supports 6, 6, and the vertical frame 5. In addition, uprights 32, opposite to the corners occupied by the vertical angle frames, are employed.

The means for supporting and elevating the sub-frame are as follows: In connection with the shaft bearing plates 10 is a rear shaft 11, and front shaft 12. Each shaft carries two

arms

13, 13. In connection with these arms are standards 14. These standards have bifurcated ends, shown in Fig. 5, connected by pins 33, to the ends of the arms 13. These standards have reduced cylindrical portions which pass through openings in the side members of the upper horizontal angle frame 4, and engage with and are connected to the sub-frame. For the purpose of osci-llatin the

shafts

11 and 12, the shaft 12 is provi ed with a long arm 15, and the shaft 11 is provided with a short arm 16. The arm 15 is connected to the shaft so that the portion extending below the shaft is equal in length to the arm 16. A link 17 connects these two arms so that they move together. For the purpose of THO moving the long arm 16, a screw shaft 18 is provided and is connected to this arm by means of a link 19. This construction is best shown in Fig. 1. The screw shaft '18 engages with an internally threaded hollow shaft 20. This shaft is mounted in a bearing 21 on a horizontal "channel 22. A split keeper :23 is attached to the inner side of the channel and engages with grooves in the outside of the internally threaded hollow shaft and keeps it seated against its bearing 21. For the purpose of rotating the shaft 20, a pulley 24: is provided. This pulley is engaged by a chain 25, which passes over a pulley 26. The pulley 26 is carried upon a horizontal brace 27, and is provided with a crank 28. The purpose of employing two pulleys and a chain is to raise the crank to a position where the operator can turn it without bending down, and thus avoid the fatigue incident to constant bending.

The sub-frame 2 comprises side members 29 of flat strip material having the front ends bent up as shown, and the rear ends bent down, so that they will slide readily under the platform. The bent up ends areconnected together by an angle iron 30. This angle has a part of its web cut away so as to allow the arm 15 to swing to the extreme backward position, as shown in dotted lines in Figs. 2 and 1. The side members 29 of the sub-frame are connected to the standards 14, by any suitable connection. The connection illustrated is made by passing the standards through threaded holes in the sub-frame.

The operation of the device is apparent from the foregoing description. The operator turns the crank 28 in one direction or the other. This has the eflect of turning the internally threaded hollow shaft 20 and moving the threaded shaft 18 in one direction or the other. Through the agency of the link 17, both rock shafts will be oscillated to the same amount, and both ends of thesub-frame will be elevated or depressed. The pitch of the thread on the shaft 18 is such that, irrespective of the weight upon the sub-frame, the shaft 20 will not be turned thereby. Y One feature of the invention is illustrated in Fig. 1. It will be observed that the threaded portion of the hollow shaft 20 is of limited extent compared to the length of the shaft, and this threaded portion is located at the extreme rear end of the shaft. The effect of this is that the shaft 18 will never project beyond the front end of the shaft 20 when the shaft 18 is in the extreme forward position, and at the same time, only enough screw-threads will be employed in the shaft 20 to get a proper engagement with the shaft 18. If the shaft 20 were threaded throughout its entire length, there would be too much friction upon the shaft 18 when the shaft 18 were in the extreme forwardmost position.

In accordance with the provisions of the' patent statutes, I have described the principle of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is merely illustrative and that the invention may be carried out in other ways.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A truck having in combination a frame, a vertical member rigidly secured to one end of the frame, a sub-frame, standards supporting the sub-frame and carried by the frame, rock shafts carried by the frame and connected to the standards, a screw-shaft, connections between the screwshaft and the rock shafts, a hollow threaded shaft associated with the screw-shaft and means for rotating the hollow shaft.

2. A truck having in combination a frame, a vertical member rigidly secured to one end of the frame, a sub-frame, standards supporting the sub-frame and carried by the frame, rock shafts carried by the frame and connected-to the standards, a screw-shaft, connections between the screwshaft and rock shafts, a hollow threaded shaft associated with the screw-shaft, a wheel to turn the hollow shaft, a second wheel adjacent to the top of the member and a chain connecting the two wheels.

3. A truck having in combination a frame, a vertical member rigidly secured to one end of the.frame, a sub-frame, standards supporting the sub-frame and carried by the frame, rock shafts carried by the frame and connected to the standards, a

screw-shaft, connections between the screw shaft and rock shafts, a hollow threaded shaft associated with the screw-shaft and means for rotating the hollow shaft, the said hollow shaft being threaded for a portion of its length only, and adjacent to the end next to the sub-frame.

4. A truck having in combination a frame, a vertical member rigidly secured to one end of the frame, a sub-frame, standards supporting the sub-frame and carried by the frame, rock shafts carried by the frame and .connected to the standards, a screw-shaft, connections between the screwshaft and rock' shafts, a hollow threaded shaft associated with the screw-shaft, means for rotating the hollow shaft and a split keeper associated with the hollow shaft.

5. A truck having in combination a frame, a. vertical member rigidly secured to one end of the frame, a sub-frame,standards supporting the sub-frame and carried by the frame, rock shafts carried by the national frame and connected to the standards, a screw-shaft, connections between the screwshaft and rock shafts, a hollow threaded shaft associated with the screw-shaft, a wheel to turn the hollow shaft, a second wheel adjacent to the top of the member and a chain connecting the two wheels, the said hollow shaft being threaded for a portion of its length. only, and adjacent to the end next to the sub-frame.

6. A truck having in combination a frame, a vertical member rigidly secured to one end of the frame, a sub-frame, standards supporting the sub-frame and carried by the frame, rock shafts carried by the frame and connected to the standards, a screw-shaft, connections between the screwshaft and rock shafts, a hollow threaded shaft associated with the screw-shaft, a wheel to turn the hollow shaft, a second wheel adjacent to the top of the member, a chain connecting the two wheels and a split keeper associated with the hollow shaft.

7. ill. truclr having; in combination a main frame, a member rigidly secured to one end of the frame, said member forming a handle to manipulate the truck, a sub-frame movable relatively to the main frame, standards carried in the main frame and supporting the subfraine, rock shafts jonrnaled in the main frame and connected to rock in unison, arms carried by the rock shafts and pivoted to the standards, a pulley having a tubular hub, a nut in one end of the hub, a circumferential groove in the hub, a split plate secured to the member and engaging the groove, a screw-shaft engaging the nut, connections between the screw-shaft and roclr shafts for oscillating the latter, and means carried by the upper part of the member for rotating the not.

This specification signed and witnessed this 2nd day of December, i913- EWAN CAMERON,

Vl itnesses 2 'lnos, W. :HALUEMAN, 'fnos. Daemon.

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