US1991237A - Library conveyer system - Google Patents

Description

Feb. 12, 1935 c. c. WAITE 1,991,237

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Patented Feb. l2, 1935 UNITED STATES PATENT OFFICE IJBRARY CONVEYER SYSTEM Application April 17, 1931, Serial No. 530,777

18 Claims.

This invention relates to library conveyers, and certain of its objects and advantages will be clear from the following.

Heretofore, in library conveyors it has been the practice to use two chains between which the carriers for the books have been supported. Among the disadvantages of this arrangement are the following: A relatively deep conduit or shaft is required to house the conveyer and loading must be accomplished first by movement through a suitable opening, in a direction at right angles to the plane of the oppositely moving sections of the chains, followed by a movement at right angles to the first movement, i. e., by a movement in a direction parallel to the said plane. Unloading has to take place in a direction parallel to said plane, and in addition suitable space must be provided to the side of the shaft for the unloading platform and book receptacles. Loading and unloading is, therefore, relatively inconvenient, and. substantial space which might be otherwise utilized is required. Furthermore, the chains lengthen or stretch, unevenly cocking the carriers and introducing operating difficulties which render this type of conveyer relatively unsatisfactory.

By the present invention these difficulties are overcome and the expense of the installation very materially reduced. I propose to provide a conveyer employing a single chain with the carrier suspended from a side of the chain sothat loading and unloading may take place in a direction perpendicular to the plane of the oppositely moving sections of the chain. This not only facilitates loading and unloading but reduces the size of the shaft necessary. The shaft may be located. in the wall, and the only space required for the unloading platform or receptacle is that which is immediately in front of the shaft. Stated in another way, the shafts may be very shallow as compared to the shafts required in the construction previously described, and no space need be provided in the wall to accommodate unloading devices or to provide room for the attendants.

My invention also contemplates the provision of a novel conveyer chain especially adapted for use in conveyer systems of the character described.

'Another object of the invention is the provision of a conveyer system in which books or the like may be automatically discharged at preselected points in the system.

More specifically, it is an object of the invention to provide a conveyer system having a central distributing station and a plurality of discharging stations, any one of which may be Stlected for the discharge of books to be distributed by control from the distribution station, thus enabling the distribution of books to various points in the system to be at the command of a single operator.

A further object resides in the provision of a conveyer system having carriers adapted to selectively actuate automatic unloading devices located at various points in the system.

The invention also contemplates apprising an operator of operating conditions in the system.

Another object of the invention is the provision of a conveyer system in which the carriers for the books being handled are mounted in a novel manner to prevent displacement of the books as the carrier traverses the system.

Among the more specific objects of the invention are the provision of novel devices of the folfollowing character: Selector devices, a selector setting device, a control device for the setting device, unloading. devices, devices for restoring the selector devices to normal position, safety devices to prevent injury to operators as well as to the system, an overload device, a take-up device, re-

' ceptacles for books discharged from the system,

signal devices, and, motor control devices. Various objects and advantages, as well as the operation of the above devices, will be readily understood as the description of the invention proceeds.

How the foregoing, together with such other objects and advantages as may hereinafter appear, or are incident to the invention, are realized, is illustrated in preferred form in the accompanying drawings, wherein- Fig. 1 is a plan section diagrammatically illustrating the old type of two chain conveyer referred to above.

Fig. 1A is a plan section diagrammatically illustrating the single chain conveyer of my invention.

Fig. 1B is a diagrammatic perspective view illustrating a general layout of a conveyer system in accordance with the invention.

Fig. 2 is a diagrammatic fragmentary elevational view of a portion of a conveyer system constructed in accordance with the invention.

Fig. 3 is a front elevational view of a selector setting device.

' Fig. 4 is a cross section taken on the line 4-4 of Fig. 3 with a selector member illustrated in dot-and-dash lines in its normal position and in its set or selective position.

Fig. 5 is a sectional elevation view of what may be termed the reading or delivery room station of the system and illustrating the manner of con-

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