Other

George F Newell

James W Justice

Portable pallet carriers for lifting a pallet and converting it into a knock-down, portable truck that can be readily assembled to move a load about. Two pairs of carriers are detachably attached to a conventional pallet adjacent the four corners thereof. Each carrier has an elongated, rigid arm that is inserted into the pallet underlying the top or platform crosspieces of the pallet and is removably attached thereto without modification of the pallet. The support arm is provided with a guide slot normal to its longitudinal axis within which is slidably guided a guide plate connected to a caster mount that is moved to two terminal positions on opposite sides of the longitudinal axis of the support arm so that the support arm raises or lowers the pallet as the caster mount is moved to its terminal positions. In order to move the caster mount, an operating linkage connects the caster mount to the support arm. The linkage cams the caster mount to its two terminal positions under control of an operating handle which is one of the links of the linkage system. A caster wheel is mounted on the caster mount of the corresponding carrier.

Portable pallet carriers

Apparatus for transmitting and receiving a plurality of separate pictures or scenes on a single television carrier signal such that a different picture appears in each quadrant of a television receiving tube, and including means for blanking out all but one quadrant and for centering and expanding that quadrant to fill the entire screen of the receiving tube. This is accomplished by separating the sync signals from the video, followed by delaying the sync signals and recombining them with the video such that the video portion, representing one quadrant, is essentially centered between horizontal and vertical sync pulses. Expansion of the single quadrant after it is centered on the tube is achieved by increasing the amplitude of the vertical and horizontal sweep waveforms. In one embodiment of the invention, a special receiver is used for centering and expanding a quadrant; while in another embodiment, an adapter is employed which essentially demodulates an incoming signal, separates and delays the sync signals, and recombines them with the video; whereupon the altered video signal is modulated for application to the antenna terminals of a conventional receiver. The invention finds particular utility in educational television systems where a pupil, for example, is required to select a correct answer from one of four presented at the four quadrants of a receiving tube.

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Pittsburgh, PA, United States of America

George F Newell