Popular Science Monthly 



611 



is greatly reduced. These jacks are easily 

 made and they are inexpensive to build. 

 The size of the jack given is for a 30-in. 

 wheel. For larger wheels the height should 

 be 2 in. more than the height from the hub 

 to the floor. — A. R. Colburn. 



'IPt CAP 



5WNG 



PLUNGia 



A Lubricator for Automobile 

 Steering Pivots 



THE accompanying sketch shows a 

 simple self-feeding grease-cup which 

 any mechanic can assemble without diffi- 

 culty. This cup 

 may be applied 

 without any 

 alterations to 

 the automobile 

 axle. It consists 

 of a brass tube 

 threaded at both 

 ends and of the 

 proper size for 

 the pipe thread 

 in the tapped 

 hole of the axle. 

 One end screws 

 into the axle, and 

 on the other end 

 a pipe cap with 

 a hole in it for 

 the plunger rod 

 is fitted. The 

 plunger and rod 

 with a light 

 compression-spring are assembled as shown. 

 This spring should not be too strong lest 

 the grease be forced out of the bearing 

 and wasted. 



The proper size spring will make this 

 lubricator far more economical than the 

 compression type of grease-cup. The 

 height of the plunger above the cap indi- 

 cates the amount of grease which is in 

 the tube. — W. Burr Bennett. 



A grease-cup made of 

 a pipe and pipe-cap 



A Soda Mixture for Quickly 

 Removing Varnish 



A GOOD varnish remover can be made 

 as follows: To three quarts of luke- 

 I warm water, add one quart of good caustic 

 1 soda. When thoroughly dissolved, apply 



with a coarse sponge. This is much better 



than using oil because varnish should not be 

 , applied on an oily surface. If oil is used, it 



should be thoroughly rubbed out with 

 ; soapy water and dried with turpentine 



or alcohol. — L, E. Fetter. 



A Free End Hacksaw- Blade for 

 Difficult Work 



AVERY handy hacksaw useful in 

 repair work is one having a free end. 

 Such a saw can be made from a broken 



Broken hacksaw in a pistol- 

 grip to make a free end saw 



blade clamped in a pistol-grip handle, as 

 shown in the illustration. The clamp part 

 consists of two L-shaped pieces held 

 together with bolts. — John W. Shank. 



An Adjustable Stand Helper for the 

 Blacksmith Shop 



THE usual standard form of helpers 

 with one leg seldom gives perfect 

 satisfaction as it is so likely to topple 

 over when the work is pulled or pushed 

 over the anvil. The illustration shows a 

 different type of a helper in which there are 

 two standards, each with two feet, mak- 

 ing it very substantial and firm. The 



A helper for the blacksmith shop that 

 will not topple over with the work 



material used consists entirely of ordinary 

 stake iron with dimensions as shown. 



