AT THE HEART OF THE ROAD TRANSPORT INDUSTRY.

Call our Sales Team on 0208 912 2120

A Simple and Efficient Window Lift.

9th June 1925, Page 8
9th June 1925
Page 8
Page 8, 9th June 1925 — A Simple and Efficient Window Lift.
Close
Noticed an error?
If you've noticed an error in this article please click here to report it so we can fix it.

Which of the following most accurately describes the problem?

T"COMPORT of passengers travelling in motorbuses, and, in fact, all saloon vehicles of the enclosed type, is dependent on several factors, but none is more important than that of ventilation. The usual type of ventilator of the hinged or swinging pattern which is fitted over the main lights meets the need in this direction up to a point, but it possesses certain drawbacks mid certainly makes a little difference to the interior air on a hot day.

It is becoming recognized to an increasing extent that the surest and best way in which to secure thorough ventilation On buses is by the use of drop lights which can be regulated and fixed in any desired position. Moreover, apart from this important consideration, passsengers appreciate an unobstructed view to the sides in good weather.

Many types of window lift of this description have been marketed, but some of them are complex in design and working, and do not lend themselves to general application. These charges cannot be levelled against the Rawlings window lift as manufactured by the Rawlings Manufacturing Co., Ltd., 1-11, Larch Road, Balham, London, S.W., for, from personal inspection and trial of a specimen window, we can vouch for its extreme simplicity both in construction and use.

The general features of the Rawlings window lift can be gathered from our drawing, which is partly cut away to reveal the working parts. In the main. the device consists of a roller, the axle of which is carried in brackets screwed to the garnish rail. The roller itself has three springs, for adjusting, the tension of which a pawl and ratchet device at the right is provided. The degree of tensiou controls the ease with which the glass is raised or lowered.

.A tabled steel wire is secured to the roller, its ends being turned over and firmly gripped, and it is carried round small pulleys attached to brackets secured to the underside of the channel in which the glass is held. The cable is of such a length that several coils remain on the roller when the glass is fully lowered, so that stress on the points of attachment is minimized. It is worthy of note that the

cable is tested to lift 600 lb., whilst the use of pulleys has been proved to provide a better means of equalizing the strain than was the case when slotted brackets were employed, and thus a smooth and even lifting and lowering action is obtained.

The upward movement of the window is, of course, automatically accomplished NG soon as the pressure of the rubber blocks on the glass is released, but for lowering a finger bracket is attached to the top channel. In our drawing the control of the window is shown to be by a lever, but it can also be operated by a screw or a key. In the first two cases the control is effgrted by passengers, but in the last-named instance by the conductor.

The rubber pads which hold the glass firmly against the fence plate (it is fixed through the medium of a brass strip insert) are parried on the upturned ends of a centrally fulcrumed rocking frame which, when the locking handle is depressed, forces the pads against

the light. The glass runs in velvetcovered rubber channel. In the channel on the underside of the top member of the frame strips of felt are fixed, and at the bottom of the frame are two rubber buffers upon which the glass rests when lowered to the full extent.

From the description we have given, and by reference to the illustration, it will be seen that there is no mechanism whatever below the garnish rail. Apart from the fact that this makes for the utmost accessibility, it also eliminates a frequent source of rattleā€”an irritating feature non-existent in the Rawlings window lift.

The simplicity of the Rawlings window lift and the ease with which it can be operated and controlled have contributed to its success amongst vehicle makers and bodybuilders alike.

Tags

Locations: London

comments powered by Disqus