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An Articulated Heavy-duty Crane DATENT No. 751,937 shows a vehicle intended

31st August 1956, Page 66
31st August 1956
Page 66
Page 66, 31st August 1956 — An Articulated Heavy-duty Crane DATENT No. 751,937 shows a vehicle intended
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Which of the following most accurately describes the problem?

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primarily for lifting crashed aircraft, which can equally well be used for other heavy duties. The patentee is H. Bernaerts, 97 Wilhelminasingel, Weert, The Netherlands.

The vehicle is articulated about a universal joint (1) and the front portion is the tractive unit, being furnished with engine and transmission.

The hoisting cable (7) is led along the jib and down the boom to a powered winch (8).

After use the assembly has to be hauled down again; a hydraulic actuator (9) does this, its cable terminating on pin 10. To provide stability, jacks (11) are provided; these can be swung outwards and can raise the wheels from the gfound.

DETACHABLE BRAKE DISCS

A MODIFICATION by which a disc

brake can be made much liglrer is shown in patent No. 752,101 (H. Butler and Dunlop Rubber Co., Ltd., 1 Albany Street, London, N.W.1). The proposed scheme is to fit a light disc to the hub without calling for heavy flange fittings.

In the drawing, the hub (1) is shown fitted to the bore of the disc (2), the two members meeting on the circle i3). They are both of the same thickness and the means for uniting them forms the subject of the patent.

Each member is notched to form square keyways (4) when in alignment. Square-shanked bolts are passed through to act as keys, whilst the nuts and the bolt-heads provide location in an endwise direction. Numerous holes (5) give lightness and prevent heat from being transmitted to the hub assembly.

A POWERED SIEERING SYSTEM A POWER ASSISTED steering I-1 scheme forms the subject of patent No. 751,809 (Monroe Auto Equipment' Co., .Monroe, Michigan, U.S.A.). Although illustrated as applied to a tractor, the scheme is said to be equally suitable for lorries and buses.

The power is supplied by a servo cylinder (I). The cylinder itself moves, the piston rod (2) being fixed to a frame bracket. The control valve mechanism is mounted inside the cylinder at the left-hand end and the hydraulic circuit is piped thereto. The valve is moved by a sleeve (3) surrounding the servo cylinder.

Initial movement of the steering wheel turns the rock-shaft in the usual way, but also moves arm 4 that turns on the power. The extending movement of the cylinder is transmitted via arm 5 which is freely mounted on the rock-shaft spindle, to the steering rodwork.

MAKING RESILIENT BUSHINGS VROM S. A. Andre Citroen, 117-167 Quai de Javel, Paris, comes patent No. 752,230, describing a novel method of producing resilient bushings. No mention is made of the purpose, but the illustration suggests that one use might be for the mounting of gear pinions.

Assembly I is the result of the process shown above it. The inner sleeve (2) and the outer member (3) are joined by a pair of rubber rings (4). These are initially placed on the male part of the tool which is then pressed through the conical cup, flattening the rings as it goes.

The metal parts need be only roughmachined because the rubber is rolled between them and does not have to slide. After assembly, the joint is then heated to complete the vulcanization of the rubber. A TRAY FOR DRAINING ENGINE

nRAIN1NG oil from an engine often

results in the garage floor being. fouled, either during the actual drainiag or when the full tray is pulled away. A tray designed expressly for thisilduty is shown in patent No. 752,456 (F. Taylor and Sons (Manchester), Ltd., Bolton Road, Pendleton, Salford, Lanes).

The tray is half-closed by a sealed lid the other 'half being covered by a sloping plate. The oil is discharged on to the latter and drains down into the interior, The tray can then be hauled out by its handle and carried away in the vertical position, the closed-in portion beinig large enough to recei:e all the oil.

A SELF-ADJUSTING HYDRAULIC TAPPET /

ADESIGN for a self-adjusting tappet the chief feature of which is simplicity, comes in patent No. 751,705 (Eaton • Manufacturing Co., Cleveland, Ohio, U.S.A.). The tappet works on.ine hydraulic principle.

The drawing shows a section of the operative part of the assembly, which comprises a cylinder and piston (1 and 2). The effective length is determined by the quantity of oil trapped in the closed space 3.

The interior (4) of the piston forms an oil reservoir and communicates with the working space via a spring-closed disc-valve (5). The spring of this is formed in one with its enclosing cup 6) thus forming a simple dual-purpose component. • In operation, the cylinder and piston arc pressed apart by a spring (7) to take up the slack in the valve mechanism. When the load is applied, the disc-valve closes and the tappet becomes a solid unit.


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