Abstract: A combination plumb/level device for removable attachment to a try square of magnetizable material to enable the square to be used as a level or a plumb. The device comprises a spirit level, and a holder for the level. The holder has a magnet associated therewith for magnetically gripping one face of a standard, unaltered leg of the try square with the level oriented relative to the face. The magnet associated with the holder is engageable with an edge of the standard, unaltered leg and orients the level with respect to the edge, enabling flatwise application of the other face and edges of the try square to a surface whereby the try square may be used to ascertain level or plumb positions. Other embodiments, including those directed to a device adapted for removable attachment to a try square of non-magnetizable material, are also disclosed.

Abstract: Stroller apparatus for converting a child's car seat having a supporting base into a mobile stroller unit in which the stroller apparatus includes a base frame, front and rear wheel sets mounted on the base frame for movement between an extended stroller position and a retracted car seat position within the base frame, an actuating lever for selectively operating the wheel sets between the extended and retracted positions, a latching mechanism for releasably interlocking the car seat supporting base to the stroller apparatus, and an extensible handle movable between an extended stroller position and a car seat position.

Abstract: A combination toy and game apparatus for two or more players having two sets of distinguishable metal scoring pieces with scoring indicia thereon, first and second spaced stations for holding said scoring pieces, and magnetic means for transferring said scoring pieces from said first station to said second station in which the magnetic means is adapted to be manually movable in vertical and horizontal planes to selectively and sequentially transfer the scoring pieces.

Abstract: A tiltable rear bed portion of a flat bed vehicle including a pair of slotted restraining arms disposed under and along a pair of parallel, spaced bed supporting frames. The arms are pivotally attached on their rear ends to vertical support arms suspended from the frame members on the rear bed portion and are slidably disposed through rectangular slots in a pair of vertical support arms suspended from the frame members on the horizontal forward bed portion. The restraining arms are slotted on the underside of their forward end portions to securely lock within the forward vertical support arms when the rear bed portion is in the horizontal load carrying position.

Abstract: A track circuit signalling system for an electrified rapid transit system using significantly fewer components is provided. Instead of a transmitter and receiver at each track circuit boundary, alternate boundaries have transmitters only; and the intermediate boundaries have two receivers. The coupling units for the two receivers are more economical than the prior art coupling unit for coupling the transmitter-receiver combination. The transmitters on each side of a receiver pair transmit signals on different carrier frequencies. Each transmitter transmits in both directions from its location. Of the two receivers at a given boundary, one is tuned to respond to signals from the transmitter on one side, while the other receiver of the pair is tuned to respond to signals from the transmitter on the other side. For special applications using overlapping track circuits, selected transmitters may be omitted and a single receiver used on each side of the omitted transmitter.

Abstract: A tiltable rear bed portion of a flat bed vehicle including a pair of slotted restraining arms disposed under and along a pair of parallel, spaced bed supporting frames. The arms are pivotally attached on their rear ends to vertical support arms suspended from the frame members on the rear bed portion and are slidably disposed through rectangular slots in a pair of vertical support arms suspended from the frame members on the horizontal forward bed portion. The restraining arms are slotted on the underside of their forward end portions to securely lock within the forward vertical support arms when the rear bed portion is in the horizontal load carrying position.

Abstract: A system for maintaining a diesel engine is disclosed herein. The system includes a timing light and tachometer.

Abstract: A diesel engine timing system including a pressure transducer coupled to the fuel injection line and an oscilloscope for visual display of the fuel pressure waveform. A timing light and tachometer are also responsive to the fuel line pressure.