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PATENTS SUMMARIZED.

28th November 1918
Page 22
Page 22, 28th November 1918 — PATENTS SUMMARIZED.
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Which of the following most accurately describes the problem?

A Ton-mile Recorder.

With the vastly increased use which is now being made of commercial motor vehicles, the need for a more compreheneive system of recording details of their operation is becoming mere apparent. It is not enough in these days of efficient engineering merely to record mileage, although this was sufficient in the case of passenger-carrying vehicles. With a motor lorry another factor calls for consideration and for record, namely, the load carried, and in addition it is of equal importance, in some cases: of even greater consequence, to know the time occupied in loading and unloading. W. E. Kemp, an American engineer. has evidently devoted-considerable etudy to this coming need of commercial motor uses, and in specification No. 119,583 he describes an improved recording,instrumeet which he has invented whereby it is possible to secure a record including the following data :—(1) The time at which the vehicle is started in motion, and the peiieds of time during which it is in motion ; (2) the point or points of time at which the moving vehicle comes tea stop and the time during which the stop continues; (3) the speedeof travel, and atso the changes of speed; (4) the distance travelled by the vehicle; (5) the weight ot the load carried by the vehicle in relation to the time and the distance; (6) the time consumed in loading, enloading, or partially unloading the. vehicle.

Broadly speaking, the invention consists of a record-tape carrier operated by clock mechanism, with two markers, one of which is operated by one of the wheels of the vehicle, and the other one by the depression of the vehicle body under its load. Mose of the details of the mechanism which this apparatus embodies are known in various forms. It is important to note that the inventor has dispensed with the use of the flexible

revolving shaft of the type pnpulaTly employed in connection with speedometers. Instead, the tension member of a mechanism of the I3owden type is used, the road wheel of the vehicle having fixed to it a cam whereby this flexible member is operated once per revolution. Through the medium of ether earns and gearing this is recorded on the drum as a distance travelled : the base of the diagram representing tune.

A description of the details of this mechanism will be found in full in the specification to which we refer. The diagrams, of which there are many, include some typical specimens of records made by the machine. The load-recording apparatus i8 in the form of a. balance interposed between the body of the vehicle and the chassis.

Detail Improvements.

The time necessary to fill the numerous grease cups 'on a ehassie should ba • shortened considerably by the UM of grease capsules, as described in specification No. 119,624. by L. G. Copeinan.

A. Se Welply -describes in No. 119,616 a form of priming cep, which can also be utilized, when so desired, temporarily to reduce the compression pressure in the cylinder, as when attempting to start a. heavy engine.. •

A cartridge for containing calcium carbide to facilitate the use of that material in acetylene generators is the subject of No. 119,584, by Fallowlite; Ltd. Q. B.. Bragg has invented in No 119,603 an improved form of " scotch." The ordinary triangular block of wood is supplemented by a pair of handles, and means are also provided for carrying it from the chassis when it is not required for use.

, A somewhat complicated-lookiug are.-raugenit 'of bylimiers for an internalcombustion engine is illustrated in conjunction with specification No. 119.552 (by' P. Challis), the principal objective being theefacility of adjusting the volume of compression space and combustion stroke in accordance with varying requirements 'from any cause.

R. W. Maudelay and the 'Standard Motor CO., Ltd:, patent, in No. 119,564, an improved arrangement of filler mid depth recorder for a petrol tank. Both the cap for the filling orifice and the depth recorder -are carried within one casting, so thee rapid access for replenishing the supply of fuel in the tank is possible by means of a spring lid to the orifice; by removal of the whole casting, a large hole is discovered into which the hand and arm may be inserted for the purpose of cleaning out the, insides of the tank.

A special type of differential gear for chain track vehicles is the subject of No 119,563, by G. M. Blackstone and. others. When the tractor is required to travel in a straight line, the differential gear is locked, but manipulation of this gear is the Means of changing the direction of travel,

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People: W. E. Kemp

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