272 



Popular Science Monthly 



By pressing the foot-lever the door opens. By the use of 

 branched rods under the car both doors may be opened at once 



the car to be moved 

 toward the rear and with 

 it the curved bar and 

 the snap bolt, thus unlock- 

 ing the door. When the 

 pressure on the pedal is 

 released, the dash-pot on 

 the pedal lever forces the 

 door to close and lock 

 automatically. One device 

 can be used to open either 

 side door alone or both 

 doors simultaneously. 

 Each door is provided with 

 a knob on the snap bolt to 

 open it from the rear seat 

 independently of the foot 

 operated device. 



Automobile Doors May Be Opened 

 from the Driver's Seat 



REMAINING in his seat, the driver of 

 any two-seated automobile may un- 

 lock and open the rear or tonneau doors 

 with his foot, provided the 

 doors are fitted with the 

 simple device shown in 

 the accompanying illus- 

 tration. This consists of 

 a bevel-ended snap bolt 

 holding each door closed 

 by means of a coil spring, 

 the rear end of the bolt 

 having a pin working in 

 a slot in a downwardly- 

 curved bar positioned in 

 a curved recess between 

 the inside and outside of 

 the door. The rear end 

 of the bar is connected 

 with the rear end of a 

 long rod beneath the car 

 body and bent up through 

 a slot in the floor. The 

 forward end of this rod 

 is attached to the lower 

 end of a lever pivoted to 

 the floor of the driver's 

 cab, the upper end car- 

 rying a . pedal. A 

 dash-pot preferably 

 of the pneumatic 

 type, is carried 

 ahead of the lever 

 and connected with 

 its lower extremity. 



A push on the pedal 

 causes the rod under 



A — Latch. B — Barrel. 

 The thumb operates 



Shoot the Robber with Your 

 Pen-Knife Revolver 



A POCKET knife which has two blades 

 and an attachment that enables it to 

 discharge a twenty-two caliber short cart- 

 ridge, either blank or ball, 

 is one of the latest novel- 

 ties to be placed on the 

 market. It is said to be 

 practically as effective as 

 a regular twenty-two cal- 

 iber revolver of the short 

 barrel type. It is three 

 inches long and one-half 

 inch wide. 



You hold the revolver 

 in your right hand with 

 the back e'dge up. You 

 pull back a little latch on 

 the back of the knife, and 

 at the same time the 

 barrel is tilted forward 

 and opened with the left 

 forefinger. Then you in- 

 sert the cartridge and 

 latch the barrel securely. 

 The trigger is placed on 

 the side of the knife in a 

 raised position, ready for 

 firing. You hold the knife 

 in your right hand with 

 the end of the right 

 thumb on top of the 

 trigger. Press the trigger 

 down quickly and the 

 cartridge is exploded. It 

 is aimed in the same 

 way as any ordinary 

 revolver. 



C — Trigger, 

 the trigger 



