US1710391A

US1710391A - Heater for engine water circulating systems

Info

Publication number: US1710391A
Application number: US289794A
Authority: US
Inventors: Carl F Walz
Original assignee: DURKEE ATWOOD CO
Current assignee: DURKEE ATWOOD CO
Priority date: 1928-07-02
Filing date: 1928-07-02
Publication date: 1929-04-23
Anticipated expiration: 1946-04-23

Description

(3. F. WALZ HEATER FOR ENGINE WATER CIRCULATING SYSTEMS April 23, 1929.

Filed July 2, 1928 Pia, i

Inventor CARL F. WALZ B M WWW Attorneys Patented Apr. 23, 1929 UNITED STA" FFICE,

CARL F. WALZ, F MINNEAPOLIS, MINNESOTA, ASSEGNOR TO DURKEE-ATWOQD GOM- PANY, 0F MINNEAPOLIS, MINNESOTA, A CQRPQRATION 0F MINNESOTA.

HEATER FQR ENGINE WATER CIRCULATKN'G SYSTEMS Application filed July 2, was. Serial lilo. 839,794.

This invention relates to improvements in heaters for water circulating systems of 111- ternal combustion engines, whereby the cooli ing medium may be kept Warm in cold weather, when the engine is not running, and also whereby the circulating cooling medium of the engine may be heated to warm the en gine before initially starting the latter, thereby facilitating engine starting.

An object of the invention is to provide a heater for engine Water circulating systems adapted to be connected in a pipe of the circulating system and having means for laterally adjusting it with respect to the pipe, in 16 which it is connected, to facilitate the installation of the device on the engine.

A further object of the invention is to provide a heater for engine water circulating systems, comprising a tubular supporting member having a suitableheating means mounted therein and adapted for attachment with an electric light socket, or other source of electrical energy, and the supporting member having eccentric means being provided at each end thereof, permitting lateral adjustment thereof with respect to the water circulating pipe in which it is connected, so that the axis of the heater supporting member may be off-set from the axis of the pipe without interfering with the operation of the heater, such adjustment of the heater being necessary when installed in some circulating systems because of the lack of room or clear ance between the water circulating pipe and the engine block.

A further and more specific object of the invention is to provide an electric heater for engine water circulating systems, comprising a tubular flexible supporting member having an eccentric bushing inserted in each end thereof, each provided with an aperture adapted to receive an end of the water circulating pipe in which the heater is mounted, and a suitable clamping means being provided at each end of the supporting member for securing the heater in adjusted positions upon the pipe, and to contract the parts to prevent leakagebetween the joints thereof.

Other objects of the invention will appear from the following description and accompanying drawings and will be pointed out in the annexed claims.

In the accompanyingdrawings, there has been disclosed a structure designed to carry put the various objects of the invention, but 1t is to be understood that the invention is not confined to the exact features shown as various changes may be made within the scope of the claims which follow.

In the accompanying drawings forming part of this specification F gure 1 is a view illustrating a portion of an internal combustion engine with the invention applied thereto;

Figure 2 is an enlarged longitudinal sectional view of the improved heater, showing the means provided at each end thereof for laterally adjusting it; v

Flgure 3 is a perspective view illustrating one of the eccentric bushings removed from the device;

Figure 4c is an end elevation, showing the device mounted in a water-circulating pipe,

and the heater laterally adjusted with respect to the pipe because of lack of clearance between the pipe and the engine block.

in the selected embodiment of the invention here shown, for purposes of disclosure, there is illustrated in Figure 1, a portion of an lnternal combustion engine comprising the usual cylinder block 2, crank case 3, cooling rad1ator 4 having a pipe connection 5 connected with the lower portion thereof, and a pipe 6, connected to the cylinder block as shown 1n Figure 1.- The pipes 5 and 6 are usually connected together by means of a flexible hose connection to permit a slight movement of one pipe with respect to the other, caused usually by engine vibration. This is common practice in most automobile engines, because the radiator is not supported directly upon the engine, but upon the vehicle phassis, and the flexible connection usually interposed between the pipes 5 and 6, permits limited relative movement between the pipes, caused by engine vibration.-

The novel heater featured in this invention is adapted to be interposed between the pipes 5 and 6 in place of the usual hose connection, above referred to.

lhe invention comprises a tubular support ing member 7, preferably of flexible material, such as rubber hose, and has a suitable heating element 8 mounted therein and supported in a wall of the member 7, as shown in Figure 2. fhe heating element comprises a cylindrical casing 9 having a relatively smaller member 11 mounted therein which is provided with outwardly flared end portions 12, adapted to be fitted into the ends of the cylindrical easing 9 and secured thereto by such means as soldering or electric welding. The wall of the relatively smaller member 11 is spaced from the wall of the casing 9, to provide an annular space adapted to receive-the heating element 8. A threaded nipple 13 is suitably secured to the wall of the casing 9 and is adapted to be inserted through an aperture 14, provided in the wall of the support -ing member 7. Washers 15. are mounted on the nip le 13 and are placed respectively inside an outside of the wall of the member 7. The outer washer is en aged by a clamping nut 16 received in threaded engagement with the nipple 13, and which also forms a finishing cap for the nipple 13 as shown in Fi ure 2. The mpple is provided with a bore 17 a apted to receive the cable conductor 18 which has one end connected with the heating element 8,

and has its other end connected with a plug 19 adapted for connection with an electri light socket. I

An important feature of this invention resides in the novel means rovided for laterally adjusting the supporting member 7 with respect to the circulating pipes 5 and 6 of the engine cooling system. The means for thus ad usting the heater is best shown in Figure 2, and comprises a pair of eccentric bushings 21, one mounted at each endof the su porting member 7. Each bushing is provide with an aperture adapted to snugly receive the end of its complementary water pipe. A suitable hose clamp 22 is provided at each end of the su porting member 7 and provides means for 'in the water-circulating tig tlylclamping the parts against the pe-- ripheries of the pipes 5 and 6 to secure the heater in proper position thereon, and also to.

prevent leakage of the cooling medium between the pi es and the heater.

Figure 4 il in the water circulating pipes 5 and 6 are arranged relatively close to the crank case 3 of the en ine, When mounting the heater in the circu ating system of an engine having the pipes 5 and 6 thus arranged, the axisof the heater or tubular member is oil-set from the axis of the ipes 5 and 6, as shown in Figure 4, to provi e clearance for the supporting member 7 between the water circulating pipes and the engine crank case or block. It will therefore be seen that by means of the novel adjusting means provided at each end of the supporting member 7 of the heater, that the latter may be relatively adjusted with respect to the pipes 5 and 6 to facilitate installation system of the engine, and also whereby the eater may be conveniently fitted between the adjacent ends of the two pipes 5 and 6, regardless of whether they are in exact axial a-llnement or not.

lustrates an installation where-- The-eccentric bushings 21 are preferably of flexible material such as rubber, and are snugly fitted into the ends of the tubular supporting member 7. Thus, when the device is connected in the circulating pipes, as shown in Figure 2, and the hose clamps are tightened, the parts encircled thereby will be contracted against the peripheries of the pipes 5 and 6, which usually are of metal, thereby securing the heater in the circulating system, and, at the same time, providing means for readily removing the heater therefrom durin the summer months, if desired. Thedevice is,

very simple and inexpensive and may be mounted in any standard type of water eirculating system in a comparatively short length of time.

1 claim as my invention:

1. A heater for engine water circulating systems, including a supporting member adapted to be interposed in a pipe of the circulating system and having means therein for heating the water, and means for laterally adjusting the heater with respect to said pipe- 2. A heater for engine water circulating systems, including a supporting member adapted to be connected in a pi e of the circulating system, means in sai supporting member for heating the water, and eccentric means for laterally adjustin'gthe sup-' porting member with respect to said pipe.

3. A heater for engine water circulating systems, comprising a supporting member adapted to be connected in a pipe of the circulating system, heating means in said supporting member, and eccentric means at each end of the member for laterally adjusting it with respect to said pipe.

4. A heater for engine water circulating systems, com rising a flexible tubular supporting mem er, a heating unit mounted therein and having means for connection with a source of electrical energy, and an cecentric bushing inserted in each end of .the supporting member and each adapted to be connected with a pipe of the circulating system, said eccentrics providing means for laterally adjusting the heater with respect to said pipe.

5. A heater for engine water circulating systems, comprising a flexible tubular supporting member,'a heating unit mounted therein and having means for connection with a source of electrical ener y, an eccentric bushing inserted in each en of the supporting member and each adapted to be connected with a pipe of the circulating system, said with said jacket and radiator, of a water heatbushings to provide leak-proof joints beer and circulator, comprising a tubular memtween the bushings and pipes, said bushings ber adapted to connect together said pipes, being interchangeable whereby the heater 10 said tubular member having flexible bushings may be fitted to pipes of different diameters. 5 detachably mounted therein provided with In Witness whereof, I have hereunto set my apertures adapted to receive the terminals of hand this 28th day of June, 1928. said pipes, and means for contracting said CARL F. WALZ.