Radio-Telephone Aids Police
MOTOR PATROLMEN, through the latest development in police communication, perfected by Bell Telephone laboratories, can now carry on a two-way conversation with headquarters without leaving their cars. The radio car transmitter weighs but 20 pounds, has a power of 5 watts, and is crystal controlled. The sound of the patrolman’s voice automatically puts the transmitter on the air.
Young Detective Smashes Police Ring
MANY an officer saw stocky, youthful Wallace Jamie about the St. Paul police station the late winter and early spring of 1935 and laughed up their sleeves at his activities.
By midsummer that year, however, they wished sincerely in their hearts they never had heard of him.
TRICKS of the Filling Station Gyp Exposed
by MANLY S. MUMFORD WHEN a motorist asks for five gallons of gasoline at an oil station, he may get it. And he may not. He may get four and a half gallons of gasoline and a half gallon of kerosene, furnace oil or some other adulterated form of gasoline. There are many ways in which oil stations can, if they are so minded, bilk the public, and many of them do it.
By IRA KAMEN
In the battle for TV ratings crime will be the loser when WUHF broadcasts the line-up THE New York City police are using UHF-television as a weapon in their war against crime. Now, more than ten times the number of detectives can view and study the features and mannerisms of criminals at police line-ups than was previously possible—by watching a TV screen at their local precincts.
Police Inaugurate Two-Way Radio
THE first two-way police radio equipment in the United States is now in operation at Piedmont, a fashionable suburb of Oakland, California. Permission for this efficient new form of communication between police officers in the field and headquarters has been granted by the federal radio commission.
Electric Chair Powerless to Harm Wizard
THREE hundred and fifty amperes of electric current were powerless to affect the body of Bernays Johnson, electrical wizard, shown strapped to the electric chair in which the demonstration took place. The feat was performed at the recent Aero-Radio show in Boston.
Tear Gas Makes Weapon of Fountain Pen
AN INNOCENT-APPEARING fountain pen containing a charge of tear gas which makes it a most effective weapon has been perfected for the use of cashiers, bank tellers, and others likely, to be objects of robbery. The tear gas is carried in the pen in liquid form and when the trigger is released it spouts out of the pen as a vapor which will blind and disable anyone it is directed against. The release trigger is shaped like the conventional ink-filling lever, and in appearance the weapon cannot be distinguished from an ordinary writing tool.
Bullets from Same Gun Linked By Camera
PHOTOGRAPHIC evidence as to whether or not two bullets were fired from same gun is irrefutably supplied by a new comparison camera invented by Dr. J. H. Mathews, University of Wisconsin professor and criminologist.
The camera marks a sensational advance of science in the war against crime. By taking pictures of opposite sections of the two bullets being checked, the camera reconstructs a composite bullet of the two sections. The resulting photographic reproduction is enlarged between 64 and 256 times the size of the bullets, permitting positive identification before a courtroom jury.
The camera is really two cameras merging into one at the single plate holder. The bottom camera takes a photo of the base of one bullet while the upper camera registers the top section of the second bullet, the two halves appearing on the print as one.
Novel Door Lock Stops Gangsters
AN AUTOMATIC electric clock built for revolving doors such as are used in banks and department stores was designed by three Minneapolis inventors to thwart gangster attempts at wholesale robbery.
The device is concealed in the wall just above the axis of the door. In case of a holdup any employee can press the alarm push button. A small electric motor immediately engages notched clutches which prevent the door from turning.