Improvements in Air-pumps for Bicycles.
Year: 1897

page_text: I, ADOLPH PROSCHINSKY, resident of Leipzig Kohlgarten Str. 19, Manufacturer,
subject of the King of Saxony, German Empire do hereby declare the nature of this
invention to be as follows:-
Improvements in Air-pumps for Bicycles.
The invention described herein is an improvement in telescope shaped air-pumps
for bicycles, consisting of an arrangement to keep the piston-rod in position inside the
barrel, in an elevation on the bottom end of piston-rod or on the bottom of the pump-
barrel to hinder the leather bottom of piston-rod from coming into too forcible
collision with the bottom of barrel, and in an arrangement that the upper end
piston-rod is hollow and covered with a cap, and inside which another hollow tube
can be inserted and in which material for repairing the pneumatic india-rubber tyre
of bicycle can be kept.
On the accompanying sketches shows,
Fig. 1 the full view of the telescope shaped air-pump in which the piston-rod is
pushed nearly to the bottom of the barrel of pump;
Fig. 2 shows the air-pump closed;
Fig. 3 shows an air-pump in which the piston-rod is drawn out as far as is possible;
Fig. 4 shows the box which is to be placed into the top-end-piston-rod ;
Fig. 5 shows differently formed bands or rings, which are placed on the piston-rod
to insure its working straight up and down in the barrel with elasticity.
The barrel of the air-pump is marked on the sketch (a), the hollow piston-rod
working in same (b), the second piston-rod, also hollow which fits into the first hollow
piston-rod (b) is marked (6¹). On the bottom end of the pump barrel (a), and in
connection with the cover thereof (g) an elevation (h) for the piston (c) is placed for
the purpose of keeping the leather cap (f), which is fastened on the bottom of piston (c)
from touching the bottom of the barrel (g) thereby preventing the leather cap (f)
from being damaged. Around the piston-rods (b & b) movable between piston (c)
and the cover (e) is placed an undulated ring or band the two piston-rods (b & b¹) in
parallel position to the barrels, of course not mathematically exact but certainly greatly
contributing hereto.
The hollow (m) in the piston-rod (6¹) is for the insertion of the hollow tube or
box (n), this box (n) is meant to be a receptacle for materials for repairing-requisites.
The main covering is fitted with a handle (p), this cap is placed over the screw-
cap (e) and is closed by cap (1) which is shown more specially in Fig. 2.
As regards the elevation (h) at the bottom of pump-barrel, this can of course he
placed every where on the bottom or also on the front side of piston (c) as seen in
Fig. 3 marked (i).
The rings or bands which are to serve as guide-blocks for the piston-rods can be
used in many different forms as shown in Fig. 5.

page_text: Also, instead of the mentioned elevation (h) another loose corpuscle may be intro-
duced into the barrel in order to prevent the collision between the leather (f) and
the bottom (g).
FELIX F. LOEPER,
Dresden, Seestr. 5, Saxony.
Improvements in Air Pumps for Bicycles.
I, ADOLPH PROSCHINSKY, resident of Leipzig, Kohlgarten, Street No. 19, Manufacturer,
subject of the King of Saxony, German Empire, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :----
The invention described herein is an improvement in telescope shaped air-pumps
for bicycles, consisting of an arrangement to keep the piston-rod in position inside
the barrel, in an elevation on the bottom end of piston-rod or on the bottom of
the pump-barrel to hinder the leather bottom of piston-rod from coming into too
forcible collision with the bottom of barrel, and in an arrangement that the upper
end piston-rod is hollow and covered with a cap, and inside which another hollow
tube can be inserted and in which material for repairing the pneumatic india-rubber
tyre of bicycle can be kept. On the accompanying sketches (the drawings in
question are those left with the Provisional Specification) shows:
Fig. 1 the full view of the telescope-shaped air-pump in which the piston-rod is
pushed nearly to the bottom of the barrel of pump;
Fig. 2 shows the air-pump closed;
Fig. 3 shows an air-pump in which the piston rod is drawn out as far as is
possible;
Fig. 4 shows the box, which is to be placed into the top-end-piston-rod ;
Fig. 5 shows differently formed bands or rings, which are placed on the piston-
rod to ensure its working straight up and down in the barrel with elasticity.
The barrel of the air-pump, is marked on the sketch (a), the hollow piston-rod
working in same (b), the second piston rod, also hollow, which fits into the first hollow
piston-rod (b) is marked (61). On the bottom end of the pump barrel (a), and in
connection with the cover thereof (g) an elevation (h) for the piston (c) is placed for
the purpose of keeping the leather cap (f), which is fastened on the bottom of
piston (c) from touching the bottom of the barrel (g), thereby preventing the leather
cap (f) from being damaged. Around the piston-rods (b & 61) movable between
piston (c) and the cover (e) is placed an undulated ring or band (d & d¹), for the
purpose of keeping the two piston-rods (6 & 6¹) in parallel position to the barrels, of
course not mathematically exact but certainly greatly contributing hereto. The
hollow (m) in the piston-rod (6') is for the insertion of the hollow tube or box (n),
this box (n) is meant to be a receptacle for repairing requisites.
The main covering is fitted with a handle (p), this cap is placed over the screw-
cap (e) and is closed by cap (1), which is shown more spécially in Fig. 2.
As regards the elevation (h) at the bottom of pump-barrel, this can of course be
placed everywhere on the bottom or also on the front side of piston (c) as seen in Fig. 1
marked (i):
The rings or bands, which are to serve as guide-blocks for the piston-rods can be
used in many different forms as shown in Fig. 5.
Also instead of the mentioned elevation (h), another loose corpuscle may be

page_text: introduced into the barrel in order to prevent the collision between the leather (A)
and the bottom (g.)
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
On a one or more barrelled air-pump or telescope shaped air-pump for Bicycles
1. The arrangement of an elastic undulated ring, through which the air can pass,
made of metal or other material, which ring or band is placed around the piston rod
and lies between the piston and the cover of the barrel and which is intended to keep
the piston & piston rod in a position most parallel to the barrel;
2. The arrangement of an elevation on a certain point of the bottom of barrel or the
front end of piston for the purpose of stopping the leather cover of piston from being
damaged by coming into collision with the bottom of barrel ;
3. The arrangement of a hollow tube or spool which can be taken out fitting into
the upper end of piston-rod for the reception of material for repairing the bicycle.
Dated this 8th day of June 1897.
FELIX F. LOEPER,
Dresden, Seestr. No. 5.