Abstract: The control system for electrically operated brakes utilizes solid state electronic components to control the braking mechanism in a towed vehicle. Energy is provided by a pulsating voltage, the pulse width of which is varied by a pulse width modulator in accordance with the amount of braking effort desired for the vehicle being towed. The pulse width modulator has the width of its output pulse directly controlled by either a hand control, or by a foot pedal control, or in response to the brake hydraulic pressure for the hydraulic brake system of the towing vehicle. Protection against short circuit conditions in the towed vehicle is provided which disables the modulator from producing output pulses for a predetermined period of time. Adjustment of the ratio of braking effort in the towed vehicle to the braking effort in the towing vehicle is provided so as to compensate for different towed vehicle to towing vehicle weight ratios.

Abstract: A sliding roof assembly for motor vehicles or the like in which the assembly is mounted on the exterior roof portion of a vehicle adjacent an opening in the latter for sliding movement between a forward closed position and the rearwardly open position. The sliding panel member is secured in a latched position in which it is firmly engaged with a resilient seal which prevents the entry of moisture or air through the roof opening. In the unlatched condition of the panel it is supported relative to the seal to minimize friction for facilitating easy sliding movement of the panel.

Abstract: A hot air furnace having a fire box and a plurality of heat exchange units connected together in series, the front wall of said furnace being common to said fire box and said heat exchange units and the remaining walls of said furnace being spaced from said fire box and wall, the furnace employing a mechanical draft control system which simultaneously regulates an air intake to the fire box and an air intake to the exhaust duct from the furnace to uniformly regulate the temperature in the furnace.

Abstract: An underground conduit holder including a pair of identical conduit holding frames held together in spaced relationship by a pair of identical clamping structures. The clamping structures include latch portions which flex to facilitate easy attachment and detachment to holding frames without the requirement of special tools.

Abstract: A carburetor has a vacuum operated diaphragm type choke control device that acts in connection with a thermostatic control to permit the carburetor choke valve to be closed during starting but provides a controlled gradual opening of the choke valve after starting. An adjustable stop member permits adjustment of the opening by limiting the extent of movement of the diaphragm. The device includes purge feature for continual self-cleaning of the device. A one-way check valve device and precision by-pass means give exact control of the choke opening.

Abstract: A carburetion system wherein the choke opening is modulated in accordance with the ambient temperatures. A choke modulator mounted in the carburetion system's air cleaner employs a temperature sensitive provision to vary air flow to the choke thermostat and accordingly, varies the temperature at which the choke operates.The invention relates to improvements in carburetion systems.Carburetion systems wherein the choke opens too soon results in engine stalling. On the other hand if the choke remains closed or partially closed too long, the air-fuel mixture is too rich resulting in excessive undesired emissions, greater fuel consumption and even engine flooding.With the foregoing in mind, a new and different carburetion system is provided wherein the carburetor choke opening is modulated in accordance with ambient temperatures to obtain improved engine operation.

Abstract: A cable tension tester including a hang-on device having spaced clamping rollers and a central tang for bending the cable by lateral displacement through a predetermined departure .DELTA. from a straight line. A load cell connected to the tang measures the force required to maintain the departure. The tester comprises a frame, a slide body for clamping and bending the cable, a lever-type actuator and a spring connecting the actuator to the slide body so as to avoid local flattening of large diameter cables. In the illustrated form, the tester is part of a motor vehicle brake cable tension adjuster including a controller having one or more comparators for comparing measured tension to tension reference values. A difference signal is applied to a control valve to operate an air wrench which turns a nut on a tension adjustment shaft while the parking brake pedal is maintained in a fixed position.

Abstract: A combined fender and splash guard for a motorcycle comprises a single member injection molded of polypropylene and has a main fender portion and at least on splash guard integrally formed with the fender. The fender and splash guard can be doubled back on itself in a collision or spill without damage. Means are provided to attach the fender and integral splash guard to the motorcycle.