806 



Timing 



Popular Science Monthly 



Automobile Speed Demons 

 with a New Device 



^-<trfT7^-^_, 





'mjm 



lime. If the speed limit has been 

 i-xceedcd, the central operator, 

 by means of the telephone, 

 orders the third man to arrest 

 the speeder. This he does by 

 displaying a red lantern and 

 illuminated sign, reading 

 "Police." As a rule, the mo- 

 torist has no idea that he is 

 being timed until he is "flag- 

 i;ed" and arrested. 



A number of cities on the 

 Pacific Coast have adopted 

 llie system, one of which in 

 one day collected fines 

 amounting to over half the 

 [)urchase price of the system. 



The end operators are equipped with push-buttons and tele- 

 phones connecting with the stop-watches at the central station. 

 A third man flags the offender with an illuminated signal 



IF THF; inxenlion of E. H. Pendleton is 

 wideh' introduced, automobile dri\"ers 

 may no longer break the speed laws and 

 escape punishment through lack of evidence. 

 Pendleton's device consists of a neat wood- 

 en box containing a telephone, two push- 

 buttons, and two stop-watches, regulated to 

 the tick of a second. The three men re- 

 quired to operate it are located along a 

 given road at points six hundred and sixty 

 feet apart. An operatt)r is stationed at tiie 

 central point with the instrument. End 

 operators have telephonic communication 

 with this central station, and are also 

 equipped with push-buttons connected by 

 electric wires with the stop-watches at the 

 central station. 



When an automobilistwho is going faster 

 than the law allows, approaches from 

 either end, the 

 ojK'ralor presses 

 the ijush-buiton, 

 and the stop- 

 watches si.x 

 hundred and 

 sixty feet 

 away are set 

 in motion. 



W h e n I 

 a u lf>m o I) i I i s t 

 reaches the point 

 where ihi- watches 

 are located, the 

 operator there in- 

 stantly stops the 

 watches, thu> 

 registering the 



The drivinR is accomplished by the friction between 

 the rear wheels and the metal drums of the motor 

 crankshaft, which is carried crosswise of the frame 



Novel Method of Drive for 

 Light Cycle-Cars 



DRIVING through the 

 peripheries of the rear 

 wheels and steering through pixoted axles, 

 the novel method of combined driving and 

 steering shown in the accompanying sketch 

 should pro\e of %alue to the designers of 

 light c>cle-cars and the like. The driving is 

 accomplished by the friction between the 

 rear wheels and metal drums on the opposite 

 ends of the motor crankshaft, which is 

 carried crosswise of the \ehiclc frame. The 

 steering is done through the use of pivoted 

 axles front and rear, the opposite ends of 

 which are connected by two cross wires 

 manipulated h\ means of a crankshaft and 

 arms fastened to the vehicle frame. 



In turning corners, the friction drum on 

 the outside of the curve is released from its 

 contact with the rear tire, while that on the 

 insiiie of the curve presses with greater 



Brake action is 

 secured by con- 

 structing each of 

 ihe metal friction 

 tlrumsof two tele- 

 scoping parts with 

 coned surfaces. 

 The outer part 

 of the drum, which 

 is cylindrical 

 on the outside 

 where it comes 

 into s t ead \ 

 contact with 

 the tire, is 

 forced in or out 

 of the clutch- 

 actioii by means 

 of a fork. 



lorce agamst its tire. 



