Patent GB-234143-A (GB)
Title: Improvements in and relating to refrigerating cabinets
IPC: F25D11/04
Filed: 1923-11-22
Abstract: 234,143. Marks, E. C. R., (Nizer Laboratories Co.). Nov. 22, 1923. Refrigerators, domestic, shop and like; refrigerating, compression machines for.- Apparatus for use in retail shops for storing food, particularly ice-cream in brick form and in cans, comprises an insulated cabinet fitted with a brine tank 25, a number of pairs of receptacles 27, 28, 29 for the ice cream &c. in the tank, and a compression refrigerating machine 39, preferably of the kind described in Specificacations 200,539 and 201,116, removably mounted in a compartment at the side of the tank, the evaporator 37 of this machine being disposed transversely between adjacent pairs of receptacles. The cooled brine may be circulated by a pump 78 mounted on a bracket 80 at one end of the cabinet and driven by an electric motor 79, and may be supplied to the brine tanks of other cabinets. The evaporator comprises a header 36 with depending loops of pipe 38, and the vapour space of the header is in communication with a bellows 47 for actuating automatically the switch of the compressor and brine pump motors according to the vapour pressure and the temperature of the brine. The connections between the compressor and condenser unit and the evaporator include separable couplings, the supply pipe 46 to the evaporator and the pipe connection 44 to the bellows being small enough to permit closure by pinching when the machine is to be removed, whereby loss of refrigerant is avoided. The larger return pipe 45 from the evaporator is provided with a shut-off valve 52 on each side of its coupling 50 for a similar purpose. The frame of the cabinet is formed of standard bars 4 - - 8, Fig. 13, the upright corner angle bars 8 being united to the top and bottom side members by stamped and bent corner pieces 10 riveted to the bars. The open sides of the frames are closed by boards 12, 14, Fig. 11, those boards near the pieces 10 being suitably cut away. Within the boards are placed slabs of cork 17 or other insulating material, and the partition between the compressor compartment and the brine tank is similarly formed. The side walls are covered by enamelled metal sheets 61, 62 removably secured by screwing to the angle bars, Monel metal strips 64 being placed at the corners. The top comprises a number of heat-insulated and wood sections covered with a single Monel metal sheet, apertured for the reception of the tops of the ice-cream receptacles and removably secured by screwing. The compressor compartment is fitted with a removable side comprising a plate 56, Fig. 4, having an angle, bar 57 notched at its ends to form a fastening by engagement with the corner members, while the top of the plate is secured by a bolt 58, Fig. 1. The brine tank preferably rests on a moisture-collecting tray 26 directly supported by the base of the cabinet, and may be made of sheet-copper. The cream &c. receptacles are in the form of open-ended sleeves 28<a>, Fig. 12, having stiffening beads 27<1>, 27<11> at top and bottom and flanges engaging and soldered to the outside surfaces of the brine tank. At the bottom of each receptacle is a tray 30 which takes the impact of the cans of cream &c. as they are unloaded into the receptacles, and at the upper end the receptacles are fitted with split liners 31 extending to the top of the cabinet. The lids of the receptacles are formed of wood rings 35<a> enclosing cork insulation 35d and covered with sheet metal. The receptacle 28 is intended for ice cream bricks for immediate sale and is shaped rectangular in cross-section. It is fitted with a metal closure 34 at the level of the tank top and above this closure is a split ring 32 forming a shoot. The receptacles are arranged in two longitudinal rows with the evaporator set transversely.